JP2014053696A - Radio communication apparatus, control program, and control method for the radio communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform confirmation or decision of reception operation and increase frequency which can be applied to inspection.SOLUTION: A radio communication apparatus includes a reception level detection unit 12 for acquiring a frequency component of a tertiary intermodulation wave produced by nonlinearity of an amplifier, and a reception decision unit 15 for inspecting reception operation at a reception frequency band corresponding to the frequency component of the tertiary intermodulation wave.

Description

  The present invention relates to a radio communication apparatus, a control program, and a radio communication apparatus control method having a plurality of transmission frequency bands and one or more reception frequency bands.

  In recent years, wireless communication devices typified by mobile phones include not only functions for connecting to mobile phone networks, but also transmission / reception functions using wireless communication systems such as WLAN (Wireless LAN) and WiMAX, and terrestrial digital broadcast (DTV) wave reception. Some have functions.

  Such a wireless communication apparatus has an antenna that resonates in a transmission / reception frequency band corresponding to each of a plurality of functions. Conventionally, in the inspection of the reception operation of a wireless communication apparatus having a plurality of transmission / reception frequency bands, transmission equipment for inspection is installed according to the reception frequency (antenna) to be inspected.

  However, installing a transmission facility for each reception frequency (antenna) to be inspected causes an increase in inspection cost. Therefore, conventionally, in order to reduce the inspection cost, it has been proposed that the operation check of the receiving unit is performed by self-diagnosis in the wireless communication device (Patent Document 1).

  Patent Document 1 discloses that a DTV band frequency is generated by a mixed wave of a GSM (registered trademark) (Global System for Mobile Communications) transmission wave and a WLAN transmission wave, and the DTV reception operation is confirmed. ing.

International Publication No. 2008/132858 (published on November 6, 2008)

  However, the conventional technology as described above uses a mixed wave, and only uses the frequency of the difference between the transmission signal of the mobile phone function and the transmission signal of the transmission function of the wireless network communication function. Therefore, it has not been able to cope with inspections in various frequency bands.

  The present invention has been made in view of the above problems, and the object thereof is a wireless communication device, a control program, which can easily check or determine a reception operation and can increase the number of frequencies applicable to inspection. Another object is to realize a method for controlling a wireless communication apparatus.

  In order to solve the above-described problem, a wireless communication apparatus according to the present invention has a plurality of transmission frequency bands and one or more reception frequency bands, and includes a wireless amplifier that amplifies a reception signal in the reception frequency band. In the communication apparatus, a signal transmission unit that performs signal transmission in two different transmission frequency bands of the plurality of transmission frequency bands, and a transmission signal in the two different transmission frequency bands are received as reception signals, and the received signal Intermodulation wave acquisition means for acquiring a frequency component of a third-order intermodulation wave generated by nonlinearity of the amplifier in response to an input to the amplifier, and the reception corresponding to the frequency component of the third-order intermodulation wave Receiving inspection means for inspecting reception operation in the frequency band.

  In order to solve the above problems, a control program for a wireless communication apparatus according to the present invention includes an amplifier that has a plurality of transmission frequency bands and one or more reception frequency bands, and amplifies a reception signal in the reception frequency band A control program for a wireless communication apparatus comprising: a signal transmission step for transmitting signals in two different transmission frequency bands among the plurality of transmission frequency bands; and a transmission signal in the two different transmission frequency bands An intermodulation wave acquisition step of receiving the received signal as a signal and acquiring a frequency component of a third-order intermodulation wave generated by nonlinearity of the amplifier in accordance with the input of the received signal to the amplifier; A reception check step for checking the reception operation in the reception frequency band corresponding to the frequency component of It is characterized in.

  In order to solve the above problems, a method of controlling a wireless communication apparatus according to the present invention includes a plurality of transmission frequency bands and one or more reception frequency bands, and an amplifier that amplifies a reception signal in the reception frequency band. A signal transmission step of performing signal transmission in two different transmission frequency bands of the plurality of transmission frequency bands, and a transmission signal in the two different transmission frequency bands as a reception signal An intermodulation wave acquisition step of receiving and acquiring a frequency component of a third-order intermodulation wave generated by nonlinearity of the amplifier according to an input of the received signal to the amplifier; and a frequency of the third-order intermodulation wave A reception inspection step of performing an inspection of a reception operation in the reception frequency band corresponding to the component.

  The wireless communication device performs wireless transmission / reception. The wireless communication device has a plurality of transmission frequency bands and one or more reception frequency bands. The wireless communication apparatus includes an amplifier that amplifies the received signal received in the reception frequency band.

  The amplifier is a high frequency amplifier for amplifying a received signal, and for example, a low noise amplifier (LNA) can be adopted.

  According to the above configuration, the transmission is performed in two different transmission frequency bands among the plurality of transmission frequency bands, and the nonlinearity of the amplifier according to the input of the received signal in the two different transmission frequency bands to the amplifier The frequency component of the third-order intermodulation wave generated by the characteristics is acquired.

  Amplifier nonlinearity means that there is a nonlinearity between the input and the output. When a sine wave signal is input to the amplifier having such nonlinearity, harmonics are generated.

  Specifically, when signals having two different frequencies ft1 and ft2 (hereinafter referred to as fundamental waves) are input to an amplifier having such input / output characteristics, 2 × ft1, 2 × ft2 due to the nonlinearity of the amplifier. The second harmonic is generated.

According to the above configuration, a third-order intermodulation wave generated by the generation of harmonics is acquired. Third-order intermodulation waves fr _A and fr _B can be expressed by the following equations (1) and (2), respectively.

fr _A = 2 × ft1-ft2 (1)
fr _B = ft1-2 × ft2 (2)
In this way, two frequency bands as represented by the equations (1) and (2) can be obtained from the two fundamental waves.

  According to the above configuration, it is possible to inspect the reception operation in the reception frequency band corresponding to the intermodulation wave.

The reception operation in the reception frequency band corresponding to the intermodulation wave is, for example, a reception operation of a communication method capable of communication at a frequency of fr _A or fr _B.

For example, when a transmission wave of WCDMA Band 11 (1.5 GHz) is used as ft1 and a transmission wave of WLAN (2.4 GHz) is used as ft2, fr _{A is obtained} by the above equation (1) of the intermodulation wave. = 2 × 1.5−2.4 = 0.6≈0.5 (GHz) frequency components are obtained.

  Here, the DTV has a frequency band of 0.5 GHz. Therefore, the receiving operation of the DTV can be confirmed by the frequency component of the intermodulation wave.

  This reception operation can be confirmed based on various indicators. For example, the reception operation can be confirmed by detecting the reception level (RSSI or the like) at the reception frequency. When confirmation of reception operation is performed based on RSSI, for example, it may be determined whether RSSI is equal to or greater than a predetermined threshold.

  Thereby, inspections such as poor contact of the antenna contact and malfunction of the receiving circuit can be performed by the wireless communication device alone without adding an additional circuit and equipment.

  Further, the above-described configuration using the third-order intermodulation wave in the inspection has the following technical advantages over the configuration using the mixed wave (ft1-ft2). That is, when the reception level is a mixed wave (ft1-ft2), it is proportional to the product of the amplitudes of ft1 and ft2, whereas the third-order intermodulation wave “2 × ft1-ft2 (ft1-2 × ft2)” Is proportional to the product of the square of the amplitude of ft1 (ft2) and the amplitude of ft2 (ft1). Therefore, in the third-order intermodulation wave, the change width of the output “2 × ft1-ft2 (ft1-2 × ft2)” with respect to the change width of the input of ft1 and / or ft2 is the same as that of the mixed wave (ft1-ft2). Greater than the case.

  Therefore, according to the above configuration using the third-order intermodulation wave, the reception operation can be easily confirmed or determined, and the frequency applicable to the inspection can be increased.

  The same effect as described above can also be obtained by a control method including the above steps. The above steps may be realized by a computer. In this case, a control program for the wireless communication device that causes a computer included in the wireless communication device to execute the steps and a computer-readable recording medium that records the control program Are also within the scope of the present invention.

  In the wireless communication apparatus according to the present invention, when the frequencies of the transmission signals in the two different transmission frequency bands are ft1 and ft2, respectively, and the frequency of the third-order intermodulation wave is fr, fr = 2 × It is preferable that the relationship is ft1-ft2, or fr = ft1-2 × ft2.

  According to the above configuration, the reception signal in the reception frequency band has the fr frequency expressed by the above relationship. Thus, the reception frequency band can be associated with the frequency component of the third-order intermodulation wave.

  In the wireless communication apparatus according to the present invention, after transmission by the signal transmission means, the transmission level of at least one of the two different transmission frequency bands is changed, and transmission in the two different transmission frequency bands is performed again. Each of the signal re-transmission means to be performed, and the re-transmission signal in the two different transmission frequency bands are received as a re-reception signal, and the third order generated by the nonlinearity of the amplifier according to the input of the re-reception signal to the amplifier Intermodulation wave reacquisition means for acquiring the frequency component of the intermodulation wave, and the reception inspection means receives the reception level of the frequency component acquired by the intermodulation wave acquisition means, and reacquires the intermodulation wave Preferably, the reception operation is inspected based on the reception level of the frequency component acquired by the means.

  According to the above configuration, after transmission in two different transmission frequency bands is performed by the signal transmission means, at least one of the two different transmission frequency bands is changed, and transmission is performed again.

  Then, the reception operation can be inspected based on reception levels before and after retransmission.

  As described above, the third-order intermodulation wave has a relatively large change width of the output “2 × ft1-ft2 (ft1-2 × ft2)” with respect to the input change width of ft1 and / or ft2.

  For example, if the reception level before retransmission is R and the reception level after retransmission is Rn, it may be determined whether or not the relationship between Rn and R satisfies a predetermined relationship. For example, it may be determined whether or not the difference between Rn and R is greater than or equal to a predetermined threshold value. Further, it may be determined whether the ratio of Rn to R is equal to or greater than a predetermined threshold. The transmission level in the first transmission and the transmission level in the retransmission may be used for the determination.

  According to the above configuration, the reception operation can be easily confirmed or determined based on the reception levels before and after retransmission.

  In the wireless communication apparatus according to the present invention, the signal retransmitting unit changes a transmission level of one of two different transmission frequency bands at the time of retransmission, and the reception checking unit transmits the transmission level before the change. And the difference between the transmission level after the change and the difference between the reception level of the frequency component acquired by the intermodulation wave acquisition unit and the reception level of the frequency component acquired by the intermodulation wave reacquisition unit. Based on this, it is preferable to check the reception operation.

  According to the above configuration, at the time of retransmission, the transmission level of any one of two different transmission frequency bands is changed.

  According to the above configuration, the reception level of the frequency component acquired by the intermodulation wave acquisition unit and the intermodulation wave reacquisition unit for the difference between the transmission level before the change and the transmission level after the change The reception operation can be inspected based on the ratio of the difference between the acquired frequency component and the reception level.

  For example, the reception operation can be checked by comparing the ratio of the reception level difference to the transmission level difference with a predetermined threshold value.

  Due to the input / output level characteristics of the third-order intermodulation wave, the reception level difference tends to be larger than the transmission level difference.

  Therefore, specifically, if the ratio is larger than a predetermined threshold, it can be determined that the reception operation is normal. On the other hand, if the ratio is equal to or less than the predetermined threshold value, it can be determined that the reception operation is abnormal and that a contact failure of the contact spring has occurred.

  According to the above configuration, the reception operation can be easily and accurately inspected without performing complicated calculations and transmission / reception operations.

  The wireless communication apparatus according to the present invention has a plurality of sets of two different transmission frequency bands in the plurality of transmission frequency bands, and the signal transmission means uses the first set of the two different transmission frequency bands. First signal transmission means for transmitting a corresponding transmission signal, and second signal transmission means for transmitting a transmission signal corresponding to the second set of the two different transmission frequency bands, Modulated wave acquisition means is generated by first intermodulation wave acquisition means for acquiring a frequency component of a third-order intermodulation wave generated by the first set of transmission frequency bands, and by the second set of transmission frequency bands. Second intermodulation wave acquisition means for acquiring a frequency component of the third-order intermodulation wave, and the reception inspection means obtains the frequency of the intermodulation wave acquired by the first intermodulation wave acquisition means. Reception frequency band corresponding to the component , Inspect the receiving operation in the reception frequency band and corresponding to the frequency component of the intermodulation wave said second intermodulation wave acquiring unit acquires, it is preferable.

  According to the above configuration, it is possible to inspect reception operations of a plurality of reception systems. Note that one of the first set of transmission frequency bands and one of the second set of transmission frequency bands may be the same transmission frequency band.

  For example, the first set of transmission frequency bands may be WCDMA Band 11 and WLAN, and the second set of transmission frequency bands may be WCDMA Band 1 and WLAN.

  In the case of such a combination, it is possible to inspect the reception operation of DTV by the first group and WCDMA Band 11 by the second group. The above-described configuration can cope with such various reception operation tests.

  A wireless communication apparatus according to the present invention receives a signal transmission unit that performs signal transmission in two different transmission frequency bands among a plurality of transmission frequency bands, and a transmission signal in the two different transmission frequency bands as a reception signal. , Intermodulation wave acquisition means for acquiring a frequency component of a third-order intermodulation wave generated by nonlinearity of the amplifier according to the input of the received signal to the amplifier, and corresponding to the frequency component of the third-order intermodulation wave Receiving inspection means for inspecting the receiving operation in the receiving frequency band.

  A control program for a wireless communication apparatus according to the present invention includes: a signal transmission step for transmitting signals in two different transmission frequency bands among a plurality of transmission frequency bands; and a reception signal for a transmission signal in the two different transmission frequency bands. And obtaining a frequency component of the third-order intermodulation wave generated by the nonlinearity of the amplifier according to the input of the received signal to the amplifier, and the frequency of the third-order intermodulation wave A control program for causing a computer included in the wireless communication apparatus to execute a reception test step of testing a reception operation in a reception frequency band corresponding to a component.

  A method for controlling a wireless communication apparatus according to the present invention includes a signal transmission step of performing signal transmission in two different transmission frequency bands among a plurality of transmission frequency bands, and receiving a transmission signal in the two different transmission frequency bands. And obtaining a frequency component of the third-order intermodulation wave generated by the nonlinearity of the amplifier according to the input of the received signal to the amplifier, and the frequency of the third-order intermodulation wave A reception inspection step of inspecting a reception operation in a reception frequency band corresponding to the component.

  Therefore, the reception operation can be easily confirmed or determined, and the frequency applicable to the inspection can be increased.

It is a functional block diagram which shows an example of a functional structure of the radio | wireless communication apparatus which concerns on one Embodiment of this invention. It is a figure shown about an example of the specific data structure of the inspection case information used in the said radio | wireless communication apparatus. It is the flowchart illustrated about the flow of the reception determination process in the said radio | wireless communication apparatus. It is a functional block diagram which shows an example of a functional structure of the radio | wireless communication apparatus which concerns on a modification. It is a figure shown about an example of the specific data structure of the inspection case information used in the radio | wireless communication apparatus which concerns on the said modification. It is the flowchart which illustrated about the flow of the reception determination process in the radio | wireless communication apparatus which concerns on a modification.

  An embodiment of a wireless communication apparatus according to the present invention will be described below with reference to FIGS.

  First, the configuration of the wireless communication apparatus 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a functional block diagram illustrating an example of a functional configuration of the wireless communication device 1.

  As shown in FIG. 1, the wireless communication device 1 is configured to include a wireless control unit 10, an inspection case information storage unit 20, and a wireless unit 30.

  The wireless control unit 10 controls the wireless unit 30 to transmit and receive signals by wireless communication. Details thereof will be described later.

  The inspection case information storage unit 20 stores inspection case information D1 that is information that the wireless control unit 10 refers to in order to execute the inspection of the wireless unit 30. Details of the inspection case information D1 will be described later.

  The wireless unit 30 transmits and receives wireless signals by various wireless communication methods. Specifically, the wireless unit 30 includes a WCDMA (Wideband Code Division Multiple Access) transmission / reception unit 31, a WCDMA sub-reception unit 32, a WLAN (Wireless LAN) transmission / reception unit 33, a DTV (Digital Television) reception unit 34, and a GPS (Global Positioning System) receiving unit 35 is provided.

  The WCDMA transmission / reception unit 31 performs transmission / reception of radio signals by the WCDMA system, and is connected to a WCDMA antenna 31b that transmits / receives radio waves via an antenna contact unit 31a. The WCDMA transmission / reception unit 31 uses a frequency band of 2 GHz for communication in Band 1 and uses a frequency band of 1.5 GHz for communication in Band 11. The WCDMA transmitting / receiving unit 31 is illustratively connected to the WCDMA antenna 31b by a contact spring at the antenna contact unit 31a. The WCDMA antenna 31b is configured to resonate at frequencies of 1.5 GHz and 2 GHz.

  The WCDMA sub-receiving unit 32 receives a wireless signal by the WCDMA system, and is connected to a WCDMA sub-antenna 32b that receives a radio wave via an antenna contact unit 32a. The WCDMA sub-receiving unit 32 is provided for diversity reception of radio signals by the WCDMA method. The WCDMA sub-receiving unit 32 uses the 2 GHz frequency band for reception at Band 1 and uses the 1.5 GHz frequency band for reception at Band 11, as with the WCDMA transmission / reception unit 31. The WCDMA sub antenna 32b is configured to resonate at frequencies of 1.5 GHz and 2 GHz.

  The WLAN transmission / reception unit 33 performs transmission / reception of wireless signals by the WLAN method, and is connected to a WLAN antenna 33b that transmits / receives radio waves via an antenna contact unit 33a. The WLAN transceiver 33 uses a 2.4 GHz frequency band in WLAN communication. The WLAN antenna 33b is configured to resonate at a frequency of 2.4 GHz.

  The DTV receiving unit 34 receives a radio signal by the DTV method, and is connected to a DTV antenna 34b that transmits and receives radio waves via an antenna contact unit 34a. The DTV receiving unit 34 uses a frequency band of 0.5 GHz for receiving DTV broadcast waves. The DTV antenna 34b is configured to resonate at a frequency of 0.5 GHz.

  The GPS receiving unit 35 receives a radio signal by the GPS method, and is connected to a GPS antenna 35b that receives a radio wave via an antenna contact unit 35a. The GPS receiver 35 uses a frequency band of 1.5 GHz for GPS reception. The GPS antenna 35b is configured to resonate at a frequency of 1.5 GHz.

  The WCDMA sub-receiving unit 32, the DTV receiving unit 34, and the GPS receiving unit 35 respectively output an RF tuner (321, 341, and 351) that amplifies and converts a received signal input from the antenna, and an RF tuner. A baseband unit (322, 342, and 352) that performs A / D conversion on the baseband signal to be converted into a digital signal. The RF tuner has a high frequency LNA (Low Noise Amplifier) for signal amplification (not shown).

(Intermodulation wave)
Here, the intermodulation wave will be described as follows while referring to the relationship between the input / output characteristics of the amplifier (for example, the LNA included in the RF tuner 351) and the intermodulation distortion.

  In the input / output characteristics of the amplifier, if there is nonlinearity between the input and the output, harmonics are generated. When signals of two different frequencies ft1 and ft2 (hereinafter also referred to as fundamental waves) are input to an amplifier having such input / output characteristics, second harmonics of 2 × ft1, 2 × ft2 due to the nonlinearity of the amplifier. A wave is generated.

At this time, two frequency components fr _A and fr _B represented by the following equations (1) and (2) are obtained by the second harmonics 2 × ft1, 2 × ft2 and the fundamental waves ft1 and ft2, respectively. Occur.

fr _A = 2 × ft1-ft2 (1)
fr _B = ft1-2 × ft2 (2)
As described above, the generation of the second harmonic causes a distortion component in a frequency band close to the frequency component of the fundamental wave.

  Such distortion components are called two-signal third-order intermodulation distortion (Inter Modulation). Hereinafter, the frequency components of 2 × ft1-ft2 and ft1-2 × ft2 are simply referred to as intermodulation waves.

(Data structure of inspection case information)
A specific data structure of the inspection case information D1 stored in the inspection case information storage unit 20 will be described. The inspection case information D1 defines a combination of a fundamental wave and a second harmonic constituting an intermodulation wave used for inspection, and a band of a reception system to be inspected.

  This will be described in detail with reference to FIG. FIG. 2 is a diagram illustrating a specific data configuration of the inspection case information D1.

The inspection case information D1 includes case 1, case 2, and case 3, which show the definitions in the case of intermodulation wave fr _A = 2 × ft1-ft2 (in the case of the above formula (1)), respectively. ing. ft1 and ft2 indicate fundamental waves, and 2 × ft1 indicates a second harmonic. In the inspection case information, the A band corresponding to ft1 (that is, the frequency component constituting the second harmonic part in the above equation (1)) and the B band corresponding to ft2 (that is, the above equation (1)). Frequency component constituting the fundamental wave portion) and the C band which is the intermodulation wave fr obtained from the A band and the B band.

[Case 1]
In case 1, the following is defined. That is, a transmission wave of Band 11 (1.5 GHz) of WCDMA (shown as “3G” in FIG. 2) is used as A band: ft1.

  Further, a WLAN (2.4 GHz) transmission wave is used as the B band: ft2.

  Furthermore, the receiving operation of DTV (0.5 GHz) using the C band: fr as the use band is confirmed by the intermodulation wave generated from these transmission waves.

[Case 2]
In case 2, the following is defined. That is, a transmission wave of WCDMA Band 1 (2 GHz) is used as A band: ft1.

  Further, a WLAN (2.4 GHz) transmission wave is used as the B band: ft2.

  Further, the reception operation of WCDMA Band 11 (1.5 GHz) (WCDMA sub-receiving unit 32) using the C band: fr as the use band is confirmed by the intermodulation wave generated from these transmission waves.

[Case 3]
In case 3, the following is defined. That is, a transmission wave of WCDMA Band 1 (2 GHz) is used as A band: ft1.

  Further, a WLAN (2.4 GHz) transmission wave is used as the B band: ft2.

  Furthermore, the reception operation of GPS (1.5 GHz) using the C band: fr as the use band is confirmed by the intermodulation wave generated from these transmission waves.

  In the inspection case information, transmission levels for the bands ft1 and ft2 may be defined.

(Details of wireless control unit)
Details of the configuration of the wireless control unit 10 will be described with reference to FIG. As shown in FIG. 1, the radio control unit 10 includes a transmission processing unit (signal transmission unit, first signal transmission unit, second signal transmission unit) 11, a reception level detection unit (intermodulation wave acquisition unit) 12, Retransmission processing unit (signal retransmission unit) 13, reception level redetection unit (intermodulation wave reacquisition unit, first intermodulation wave acquisition unit, second intermodulation wave acquisition unit) 14, and reception determination unit ( Reception inspection means) 15.

  The transmission processing unit 11 performs transmission processing at a predetermined transmission level according to the transmission method of the A band and the B band defined in the inspection case information. The transmission processing unit 11 can perform transmission processing by controlling the WCDMA transmission / reception unit 31 and the WLAN transmission / reception unit 33.

  The reception level detection unit 12 detects the reception level of the C band. The reception level detection unit 12 may detect, for example, RSSI (Received Signal Strength Indication) as the reception level. The reception level detection unit 12 controls the WCDMA sub reception unit 32, the DTV reception unit 34, and the GPS reception unit 35 to detect the reception level in the band used for each communication method.

  The retransmission processing unit 13 performs the A band transmission process again at a transmission level different from the transmission level of the transmission wave of the transmission processing unit 11. The retransmission processing unit 13 can perform transmission processing by controlling the WCDMA transmission / reception unit 31 and the WLAN transmission / reception unit 33.

  The reception level redetection unit 14 detects again the reception level of the C band after the retransmission processing in the retransmission processing unit 13. The reception level redetection unit 14 detects the reception level by controlling the WCDMA sub-reception unit 32, the DTV reception unit 34, and the GPS reception unit 35.

  The reception determining unit 15 checks the reception operation by determining the reception level of the C band before and after the retransmission process.

  Specifically, the reception determination unit 15 compares the reception level of the C band detected by the reception level detection unit 12 with the reception level of the C band detected by the reception level redetection unit 14, and checks the reception operation. I do. For example, the reception determination unit 15 determines whether the reception level is higher after the retransmission process than before the retransmission process, and the ratio of the change in the reception level in the C band to the change in the transmission level in the A band. However, the reception operation is checked by determining whether or not is greater than a predetermined threshold. A specific example of the determination contents of the reception determination unit 15 will be described later.

(Process flow)
Next, a processing flow of the wireless communication device 1 will be described with reference to FIG. FIG. 3 is a flowchart showing the flow of reception determination processing in the wireless communication device 1.

  First, when performing the reception determination process, it is assumed that the confirmation of the transmission operation of the A band and the B band is completed (S11). There is no particular limitation on the method for checking the transmission operation of the A band and the B band, and any method can be adopted.

  Next, the transmission processing unit 11 performs transmission processing for the A band according to the definition of the inspection case information D1 by setting the transmission frequency ft1 and the transmission level G1 (S12).

  Here, for example, in the case 1, the transmission frequency ft1 is 1.5 GHz of WCDMA · Band11. The transmission level G1 can be set arbitrarily.

  Next, the transmission processing unit 11 performs transmission processing for the B band by setting the transmission frequency ft2 and the transmission level G2 in accordance with the inspection case information definition D1 (S13).

  Here, for example, in case 1, the transmission frequency ft2 is 2.4 GHz of WLAN. The transmission level G2 can be set arbitrarily.

  Furthermore, the procedures of S12 and S13 can be executed simultaneously or sequentially within a predetermined time.

  Next, the reception level detection unit 12 detects the reception level: R in accordance with the reception frequency fr (= 2 × ft1-ft2) for the C band according to the definition of the inspection case information D1 (S14). A specific example of the reception frequency fr is as follows.

  That is, in case 1, ft1 ′ = 1.5 (GHz), ft2 ′ = 2.4 (GHz), and fr ′ = 2 × 1.5−2.4 = 0.6≈0.5 ( GHz).

  In case 2, ft1 = 2 (GHz), ft2 = 2.4 (GHz), and fr = 2 × 2-2.4 = 1.6≈1.5 (GHz).

  In case 3, ft1 ″ = 2 (GHz), ft2 ″ = 2.4 (GHz), and fr ″ = 2 × 2-2.4 = 1.6≈1.5 (GHz). is there.

  Next, the retransmission processing unit 13 performs transmission processing by setting the transmission frequency ft1 and the transmission level G1n (> G1) for the A band according to the definition of the inspection case information D1 (S15).

  For example, in the case 1, the retransmission processing unit 13 uses the WCDMA Band 11 of 1.5 GHz for the transmission frequency ft1 as in the transmission process of S12, and at the time of the transmission process of S12. A transmission level G1n is set to a higher transmission level and transmission processing is performed.

  Next, the reception level redetection unit 14 detects the reception level: Rn again in accordance with the reception frequency fr (= 2 × ft1-ft2) for the C band according to the definition of the inspection case information D1 (S16). . Since the reception frequency fr is as described in S14, the description thereof is omitted here.

  Next, the reception determination unit 15 determines the reception level (S17). Specifically, the reception determination unit 15 determines whether or not the reception level satisfies the following conditions 1 and 2.

[Condition 1] Rn-R> 0
[Condition 2] (Rn-R) / (G1n-G1)> 1
In condition 1, since the transmission level G1n in the retransmission process is higher than the transmission level G1 before the retransmission process, whether or not the reception level Rn after the retransmission process is higher than the reception level R before the retransmission process. Is judged.

  In condition 2, it is determined whether or not the change width of the reception level is larger than the change width of the transmission level.

  Since the reception level of the third-order intermodulation wave fr (= 2 × ft1-ft2) is proportional to the product of the square of the amplitude of ft1 and ft2, the mutual level of the input levels of ft1 and ft2 The change in the output level of the modulated wave fr tends to increase. In condition 2, it is confirmed whether or not such a reception level characteristic of the third-order intermodulation wave appears. In condition 2, “1” is used as the threshold value by way of example, but the present invention is not limited to this.

  When the reception level satisfies both conditions 1 and 2, the reception determination unit 15 determines that there is no problem in the reception operation (OK in S17).

  On the other hand, when the reception level does not satisfy one of the conditions 1 and 2, the reception determination unit 15 determines that there is a problem in the reception operation (NG in S17). In such a case, the reception determination unit 15 may determine that a contact spring failure or a C-band reception system failure has occurred (S18).

  In S17 and S18, the reception levels of the 0.5 GHz band, 1.5 GHz band, and 1.5 GHz band can be determined for case 1, case 2, and case 3, respectively.

  Therefore, in S17 and S18, for case 1, case 2, and case 3, the DTV receiving unit 34 having a use band of 0.5 GHz, the WCDMA sub receiving unit 32 having a use band of 1.5 GHz, and 1. The reception operation of the GPS receiver 35 having a band of 5 GHz can be inspected, or the DTV antenna contact 34a, the WCDMA sub-antenna contact 32a, and the contact confirmation between the GPS antenna contact 35a and each of the antennas can be performed. .

  The reception determination unit 15 may check the reception operation by determining whether the reception level R is equal to or higher than a predetermined threshold at the end of S14. The reception determination unit 15 may determine that the reception level R is normal if the reception level R is greater than or equal to a predetermined threshold, while determining that an abnormality has occurred if the reception level R is less than the predetermined threshold.

  The above processing flow can be executed, for example, in the inspection before shipment of the wireless communication device 1. For example, the above-described processing flow may be realized by an inspection program, and the above-described processing flow may be executed by the above-described inspection program previously introduced into the wireless communication device 1 at the time of inspection before shipment. Further, the inspection program may be uninstalled from the wireless communication apparatus 1 after the inspection before the shipment and before the shipment.

  The above-described processing flow may be realized as a debug mode (developer mode) of a communication control program that performs communication control of the wireless communication device 1.

  In the inspection before shipment, it is not necessary to provide a dedicated communication facility for the reception operation inspection. In addition, since the reception operation can be inspected in the same process as the transmission operation inspection, the necessary area of the process can be reduced. Furthermore, since the movement between the inspection steps can be omitted, the inspection time can be reduced, so that the inspection cost can be reduced.

(Modification)
In the above, the reception operation test according to the above equation (1) has been mainly described, but the present invention is not limited to this. The reception operation can also be inspected by the above equation (2).

  In the wireless communication device 1A according to the modification described below, the reception operation test according to the above equation (2) will be described.

  A configuration of the wireless communication device 1A according to the modification will be described with reference to FIG. FIG. 4 is a functional block diagram illustrating an example of a functional configuration of the wireless communication device 1A.

  As illustrated in FIG. 4, the wireless communication device 1 </ b> A is configured by changing the configuration of the wireless communication device 1 illustrated in FIG. 1 as follows.

  That is, the wireless communication device 1A has a configuration in which the wireless unit 30 and the inspection case information storage unit 20 of the wireless communication device 1 are changed to a wireless unit 30A and an inspection case information storage unit 20A, respectively.

  The inspection case information storage unit 20A stores inspection case information D2, which is information that the wireless control unit 10 refers to in order to execute the inspection of the wireless unit 30A. Details of the inspection case information D2 will be described later.

  The radio unit 30A has a configuration in which the WCDMA transmission / reception unit 31 and the WLAN transmission / reception unit 33 in the radio unit 30 are changed to a WCDMA transmission / reception unit 36 and a WLAN transmission / reception unit 37, respectively.

  The WCDMA transmission / reception unit 36 performs transmission / reception of a radio signal by the WCDMA system, similar to the WCDMA transmission / reception unit 31 described above, and is connected to a WCDMA antenna 36b that transmits / receives radio waves via an antenna contact unit 36a. The WCDMA transmission / reception unit 36 performs wireless communication using Band 8 in addition to Band 1 and Band 11. That is, the WCDMA transceiver unit 36 uses a frequency band of 0.9 GHz in Band8. The WCDMA antenna 36b is configured to resonate at 0.9 GHz, 1.5 GHz, and 2 GHz. The rest is the same as described for the WCDMA transmission / reception unit 31, and a detailed description thereof is omitted here.

  The WLAN transmission / reception unit 37 performs wireless signal transmission / reception by the WLAN system similarly to the above-described WLAN transmission / reception unit 33, and is connected to a WLAN antenna 37b that transmits / receives radio waves via an antenna contact unit 37a. The WLAN transmission / reception unit 37 uses a frequency band of 5 GHz in addition to 2.4 GHz in communication by WLAN. The WLAN antenna 37b is configured to resonate at 2.4 GHz and 5 GHz. The rest is the same as that described for the WLAN transmitter / receiver 33, and a detailed description thereof will be omitted here.

(Data structure of inspection case information)
A specific data structure of the inspection case information D2 stored in the inspection case information storage unit 20A will be described with reference to FIG.

  As shown in FIG. 5, the inspection case information D2 employs the same data structure as the inspection case information D1, but the defined inspection case is different from the inspection case information D1.

That is, case 4 and case 5 are included in the inspection case information D2, and these indicate the definitions in the case of the intermodulation wave fr _B = ft1-2 × ft2 (in the case of the above formula (2)), respectively. .

  Note that ft1 and ft2 indicate fundamental waves, and 2 × ft2 indicates a second harmonic. In the inspection case information, the A band corresponding to ft1 (that is, the frequency component constituting the fundamental wave portion in the above equation (2)) and the B band corresponding to ft2 (that is, 2 in the above equation (2)). Frequency component constituting the second harmonic part) and the C band which is the intermodulation wave fr obtained from the A band and the B band.

[Case 4]
In case 4, the following is defined. That is, a 2.4 GHz transmission wave of WLAN is used as A band: ft1.

  Also, a 3G Band 8 (0.9 GHz) transmission wave is used as the B band: ft2.

  Furthermore, the receiving operation of DTV (0.5 GHz) using the C band: fr as the use band is confirmed by the intermodulation wave generated from these transmission waves.

[Case 5]
In case 5, the following is defined. That is, a 5 GHz transmission wave of WLAN is used as A band: ft1.

  In addition, a transmission wave of WCDMA Band 11 (1.5 GHz) is used as the B band: ft2.

  Further, the reception operation of WCDMA Band 1 (2 GHz) (WCDMA sub-receiving unit 32) using the C band: fr as the use band is confirmed by the intermodulation wave generated from these transmission waves.

(Process flow)
Next, a processing flow of the wireless communication device 1A will be described with reference to FIG. FIG. 6 is a flowchart showing the flow of reception determination processing in the wireless communication device 1A.

  Note that S21, S22, S23, S25, S27, and S28 shown in FIG. 6 are the same as S11, S12, S13, S15, S17, and S18 shown in FIG.

  In S24 and S26 shown in FIG. 6, the reception level of the reception frequency different from S14 and S16 shown in FIG. 3 is detected.

  That is, in S24, the reception level detection unit 12 detects the reception level: R in accordance with the reception frequency fr (= ft1-2 × ft2) for the C band according to the definition of the inspection case information.

  In S26, the reception level redetection unit 14 detects the reception level: Rn again in accordance with the reception frequency fr (= ft1-2 × ft2) for the C band.

  A specific example of the reception frequency fr in S24 and S26 is as follows.

  That is, in case 4, ft1 = 2.4 (GHz), ft2 = 0.9 (GHz), and fr = 2.4-2 × 0.9 = 0.6≈0.5 (GHz). is there.

  Further, in case 5, ft1 ′ = 5 (GHz), ft2 ′ = 1.5 (GHz), and fr ′ = 5-2 × 1.5 = 2 (GHz).

  In S27 and S28, the reception levels of the 0.5 GHz band and the 2 GHz band can be determined for Case 4 and Case 5, respectively.

  Therefore, in S27 and S28, for the cases 4 and 5, the DTV receiving unit 34 having a use band of 0.5 GHz, the reception operation of the WCDMA sub-receiving unit 32 having a use band of 2 GHz, or the DTV antenna contact point It is possible to check the contact between the antenna 34a and the WCDMA sub-antenna contact 32a and each of the antennas.

  Note that in the wireless communication device 1A, the inspection case information storage unit 20 of the wireless communication device 1 may be further provided so that the reception operations of the cases 1 to 5 can be inspected.

  That is, the inspections of the reception operations from case 1 to case 5 can be combined. When performing this combination inspection, for example, the processing flow from S21 to S28 may be executed for each case.

  The wireless unit 30A included in the wireless communication device 1A is configured to include 5 transmission systems and 4 reception systems, but this configuration is not essential. The wireless unit 30A may be configured to include two transmission systems and one reception system depending on the case. For example, the radio unit 30A can be configured with two transmission systems of WCDMA Band11 and WLAN (2.4 GHz) and one reception system of DTV according to case 1.

(Action / Effect)
As described above, the wireless communication devices 1 and 1A have a plurality of transmission frequency bands and one or more reception frequency bands, and are wirelessly provided with an amplifier that amplifies a reception signal in the reception frequency band in the RF tuner. In communication apparatuses 1 and 1A, transmission processing unit 11 that respectively performs signal transmission in two different transmission frequency bands among the plurality of transmission frequency bands, and receives transmission signals in the two different transmission frequency bands as reception signals. A reception level detector 12 that obtains a frequency component of a third-order intermodulation wave generated by nonlinearity of the amplifier according to an input of the received signal to the amplifier; and a frequency component of the third-order intermodulation wave And a reception determination unit 15 that performs a reception operation check in the corresponding reception frequency band.

  According to the above configuration in which the third-order intermodulation wave is used for the inspection of the reception operation, the reception operation can be easily confirmed or determined, and more frequencies can be applied to the inspection.

  Further, in the wireless communication devices 1 and 1A, after transmission by the transmission processing unit 11, at least one of the two different transmission frequency bands is changed, and transmission in the two different transmission frequency bands is performed again. And re-transmission processing unit 13 for performing each of the above, and receiving a re-transmission signal in the two different transmission frequency bands as a re-reception signal, which is caused by nonlinearity of the amplifier according to the input of the re-reception signal to the amplifier A reception level redetection unit 14 that acquires the frequency component of the third-order intermodulation wave, and the reception determination unit 15 receives the reception level of the frequency component acquired by the reception level detection unit 12 and the reception level redetection unit. It is preferable that the reception operation is inspected based on the reception level of the frequency component acquired by 14.

  According to the above configuration, the reception operation can be easily confirmed or determined based on the reception levels before and after retransmission.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

[Example of software implementation]
Finally, each block of the wireless communication device 1, particularly the transmission processing unit 11, the reception level detection unit 12, the retransmission processing unit 13, the reception level redetection unit 14, and the reception determination unit 15 of the wireless control unit 10 are integrated circuits. It may be realized by hardware by a logic circuit formed on the (IC chip), or may be realized by software using a CPU (Central Processing Unit).

  In the latter case, the wireless communication apparatus 1 includes a CPU that executes instructions of a program that realizes each function, a ROM (Read Only Memory) that stores the program, a RAM (Random Access Memory) that expands the program, the program, A storage device (recording medium) such as a memory for storing various data is provided. An object of the present invention is to provide a recording medium on which a program code (execution format program, intermediate code program, source program) of a control program of the wireless communication apparatus 1 that is software that realizes the above-described functions is recorded so as to be readable by a computer. This can also be achieved by supplying the wireless communication apparatus 1 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include non-transitory tangible medium, such as magnetic tape and cassette tape, magnetic disk such as floppy (registered trademark) disk / hard disk, and CD-ROM / MO. Discs including optical discs such as / MD / DVD / CD-R, cards such as IC cards (including memory cards) / optical cards, semiconductor memories such as mask ROM / EPROM / EEPROM (registered trademark) / flash ROM Alternatively, logic circuits such as PLD (Programmable Logic Device) and FPGA (Field Programmable Gate Array) can be used.

  The wireless communication device 1 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited as long as it can transmit the program code. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication network, and the like can be used. The transmission medium constituting the communication network may be any medium that can transmit the program code, and is not limited to a specific configuration or type. For example, even with wired lines such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL (Asymmetric Digital Subscriber Line) line, infrared rays such as IrDA and remote control, Bluetooth (registered trademark), IEEE 802.11 wireless, HDR ( It can also be used by radio such as High Data Rate (NFC), Near Field Communication (NFC), Digital Living Network Alliance (DLNA), mobile phone network, satellite line, and digital terrestrial network. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The wireless communication device according to the present invention has a wide range of network devices having a plurality of different transmission frequency bands and having a reception frequency band, such as wireless routers, notebook PCs, tablet PCs, and smartphones. Can be applied.

DESCRIPTION OF SYMBOLS 1 Wireless communication apparatus 10 Wireless control part 11 Transmission process part (Signal transmission means, 1st signal transmission means, 2nd signal transmission means)
12 Reception level detector (intermodulation wave acquisition means)
13 Retransmission processing unit (signal retransmission unit)
14 Reception level redetection unit (intermodulation wave reacquisition means, first intermodulation wave acquisition means, second intermodulation wave acquisition means)
15 Reception determination unit (reception checking means)
DESCRIPTION OF SYMBOLS 20 Inspection case information storage part 30 Wireless part 31 WCDMA transmission / reception part 32 WCDMA sub-reception part 33 WLAN transmission / reception part 34 DTV reception part 35 GPS reception part 30A Radio | wireless part 36 WCDMA transmission / reception part 37 WLAN transmission / reception part

Claims (7)

A plurality of transmission frequency bands and one or more reception frequency bands;
In a wireless communication apparatus comprising an amplifier for amplifying a reception signal in the reception frequency band,
Signal transmission means for performing signal transmission in two different transmission frequency bands of the plurality of transmission frequency bands,
Intermodulation that receives transmission signals in the two different transmission frequency bands as reception signals, and obtains frequency components of a third-order intermodulation wave generated by nonlinearity of the amplifier according to the input of the reception signals to the amplifier Wave acquisition means;
A radio communication apparatus comprising: a reception inspection unit that inspects a reception operation in the reception frequency band corresponding to a frequency component of the third-order intermodulation wave. The frequencies of the transmission signals in the two different transmission frequency bands are ft1 and ft2, respectively.
When the frequency of the third-order intermodulation wave is fr,
fr = 2 × ft1-ft2 or fr = ft1-2 × ft2
The wireless communication apparatus according to claim 1, wherein: Further, after the transmission by the signal transmission means, the signal retransmission means for changing the transmission level of at least one of the two different transmission frequency bands and again performing transmission in the two different transmission frequency bands,
The second transmission signal in the two different transmission frequency bands is received as a re-reception signal, and the frequency component of the third-order intermodulation wave generated by the nonlinearity of the amplifier according to the input of the re-reception signal to the amplifier is obtained. Intermodulation wave reacquisition means for acquiring,
The reception checking means checks the reception operation based on the reception level of the frequency component acquired by the intermodulation wave acquisition means and the reception level of the frequency component acquired by the intermodulation wave reacquisition means. The wireless communication apparatus according to claim 1, wherein the wireless communication apparatus performs the wireless communication apparatus. The signal retransmission means changes the transmission level of one of two different transmission frequency bands at the time of retransmission,
The reception inspection means is
For the difference between the transmission level before the change and the transmission level after the change,
The reception operation is inspected based on a ratio of a difference between the reception level of the frequency component acquired by the intermodulation wave acquisition unit and the reception level of the frequency component acquired by the intermodulation wave reacquisition unit. The wireless communication apparatus according to claim 3, wherein: A plurality of sets of two different transmission frequency bands in the plurality of transmission frequency bands,
The signal transmission means includes
First signal transmission means for transmitting transmission signals corresponding to the first set of the two different transmission frequency bands;
Second signal transmission means for transmitting transmission signals corresponding to the second set of the two different transmission frequency bands, and
The intermodulation wave acquisition means includes:
First intermodulation wave acquisition means for acquiring a frequency component of a third-order intermodulation wave generated by the first set of transmission frequency bands;
Second intermodulation wave acquisition means for acquiring a frequency component of a third-order intermodulation wave generated by the second set of transmission frequency bands,
The reception checking means includes a reception frequency band corresponding to a frequency component of the intermodulation wave acquired by the first intermodulation wave acquisition means, and a frequency component of the intermodulation wave acquired by the second intermodulation wave acquisition means. Check the reception operation in the reception frequency band corresponding to
The wireless communication apparatus according to claim 1. A plurality of transmission frequency bands and one or more reception frequency bands;
A control program for a wireless communication device including an amplifier for amplifying a reception signal in the reception frequency band,
A signal transmission step of performing signal transmission in two different transmission frequency bands of the plurality of transmission frequency bands,
Intermodulation that receives transmission signals in the two different transmission frequency bands as reception signals, and obtains frequency components of a third-order intermodulation wave generated by nonlinearity of the amplifier according to the input of the reception signals to the amplifier Wave acquisition step;
A radio communication apparatus that causes a computer included in the radio communication apparatus to execute a reception inspection step of inspecting a reception operation in the reception frequency band corresponding to a frequency component of the third-order intermodulation wave. Control program. A plurality of transmission frequency bands and one or more reception frequency bands;
In a control method of a wireless communication device including an amplifier that amplifies a reception signal in the reception frequency band,
A signal transmission step of performing signal transmission in two different transmission frequency bands of the plurality of transmission frequency bands,
Intermodulation that receives transmission signals in the two different transmission frequency bands as reception signals, and obtains frequency components of a third-order intermodulation wave generated by nonlinearity of the amplifier according to the input of the reception signals to the amplifier Wave acquisition step;
And a reception inspection step of inspecting reception operation in the reception frequency band corresponding to the frequency component of the third-order intermodulation wave.

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