WO2008074190A1

WO2008074190A1 - Receiving, transmitting method for bluetooth signal and bluetooth transceiver therein

Info

Publication number: WO2008074190A1
Application number: PCT/CN2006/003519
Authority: WO
Inventors: Michael Chen; Huiyong Hong; Chongjun Jiang; Kan Lu; Yiyan Tang; Feng Wu; Shuangli Wu; Bin Xu
Original assignee: 3Dsp (Beijing) Limited Corporation
Priority date: 2006-12-21
Filing date: 2006-12-21
Publication date: 2008-06-26
Also published as: CN101536326A

Abstract

A receiving and transmitting method for bluetooth signal and a bluetooth transceiver therein. The receiving and transmitting method for bluetooth signal includes the steps: the bluetooth signal is received and/or transmitted by a RF unit of a wide band wireless communication apparatus which operates on the same frequency range. Receiving, transmitting and processing of the bluetooth are realized through using the RF unit of a wide band wireless communication apparatus which operates on the same frequency range, and the dedicated RF unit is not required to design for the bluetooth, therefore the realization cost of the bluetooth is decreased,and accordingly the cost and complexity of the wireless communication device with bluetooth function is decreased.

Description

Bluetooth signal receiving and transmitting method and Bluetooth transceiver thereof

The present invention relates to a wireless communication network, and more particularly to receiving, transmitting, and processing wireless signals, and, in particular, to a Bluetooth signal receiving and transmitting method, a Bluetooth transceiver thereof, and a Bluetooth communication device. Background technique

With the development of wireless communication technologies, in the same device, there are usually a plurality of wireless communication devices at the same time. For example, in a notebook computer or a palmtop computer, a wireless local area network (WLAN: Wires s Local Area Networks) is usually installed at the same time. Bluetooth (BT: Bluetooth) wireless communication device. Each type of wireless communication device is generally implemented by two sets of relatively independent hardware or modules, generally having independent and dedicated antennas, radio frequency units, and baseband signal processing units, etc., so that the wireless communication device realized has high hardware complexity and cost. If various wireless communication devices can share hardware/firmware/software resources with each other, the implementation complexity and cost of smart terminals such as handheld computers and mobile phones will be greatly reduced.

The following is an example of WLAN and Bluetooth. Bluetooth is a short-range wireless communication technology that replaces the wired connection between electronic devices. Its main features are robustness, low power consumption and low cost, and it has been widely used in consumer electronics. WLAN is a widely used computer, meter

Wireless protocols such as IEEE802.11, IEEE802.lib, and IEEE802.l lg.

With the widespread use of WLAN and Bluetooth, smart terminals such as computers and mobile phones in the same device generally have both WLAN and Bluetooth functions. Since WLAN and Bluetooth usually work in the same frequency band, namely 2. 4GHz Industrial, Scientific, Medical (ISM) band. In order to avoid interference, WLA and Bluetooth generally work in a time-sharing manner, that is, WLAN and Bluetooth use two separate dedicated hardware/modules. Implementation, Bluetooth does not work when working in WLAN, and vice versa.

Therefore, in the prior art, if the wireless communication device is installed with WLAN and Bluetooth at the same time, it is generally required to adopt two sets of relatively independent hardware/modules, that is, have independent dedicated radio frequency units and independent dedicated baseband signal processing units, etc. Will lead to higher complexity and implementation cost of wireless communication devices „

In view of the above problems in the prior art, the present invention provides a Bluetooth signal receiving and transmitting method, a Bluetooth transceiver thereof, and a Bluetooth communication device. The method utilizes a radio frequency unit of a non-Bluetooth-dedicated broadband wireless communication device operating in the same frequency band to realize reception, transmission and processing of a Bluetooth signal, and does not need to design a dedicated radio unit for Bluetooth, thereby reducing the implementation cost of the Bluetooth, correspondingly It also reduces the complexity and cost of Bluetooth-enabled wireless communication devices.

The present invention provides a Bluetooth signal receiving and transmitting method in which a Bluetooth signal is received and/or transmitted using a radio frequency unit of a broadband wireless communication device operating in the same frequency band.

The present invention also provides a Bluetooth transceiver device, including an antenna, a signal processing unit, and a high layer protocol unit;

The method further includes: a radio frequency unit, connected to the signal processing unit and the antenna, is a broadband wireless communication radio unit, configured to receive the radio frequency signal transmitted by the antenna and process the signal into an intermediate frequency or baseband signal, and then transmit the signal to the signal processing unit; The IF or baseband signal sent by the unit is processed and transmitted to the antenna.

The present invention provides a Bluetooth communication device, including a Bluetooth transceiver device and a host; wherein, the Bluetooth transceiver device comprises: an antenna, a broadband wireless communication radio unit, a signal processing unit, and a high layer protocol processing unit;

The antenna is configured to receive a radio frequency signal including Bluetooth radio frequency signal information from the air, and transmit the signal to the broadband wireless communication radio unit; receive the radio frequency signal transmitted from the broadband wireless communication radio unit, and transmit the signal to the air; The broadband wireless communication radio unit is configured to receive the radio frequency signal transmitted by the antenna and process it into an intermediate frequency or baseband signal, and then transmit the signal to the signal processing unit; the intermediate frequency or baseband signal sent by the receiving signal processing unit is processed and transmitted to the antenna; The bandwidth of the intermediate frequency or baseband signal is not less than the bandwidth of the Bluetooth baseband signal;

a signal processing unit that receives an intermediate frequency or baseband signal from a broadband wireless communication radio unit, processes the signal, and transmits the signal to a higher layer protocol processing unit; and receives control commands and data transmitted by the higher layer protocol processing unit under control of the control command After processing the data into an intermediate frequency or baseband signal, transmitting the data to the broadband wireless communication radio unit;

a high-level protocol processing unit, connected to the host and the signal processing unit, at least comprising a link control unit, the link control unit receiving the control command and the data to be sent by the host, processing the data under the control of the control command, and then The signal is sent to the signal processing unit; the signal transmitted by the signal processing unit is received, processed, and transmitted to the host.

Therefore, the present invention utilizes a radio frequency unit of a broadband wireless communication device that operates in the same frequency band as the wireless communication device of the wireless communication device to realize reception, transmission and processing of the Bluetooth signal, and does not need to specifically design a radio frequency unit for the Bluetooth, thereby reducing the Bluetooth. The cost of implementation also correspondingly reduces the complexity and cost of Bluetooth-enabled wireless communication devices. ' Description of the drawings

1 is a schematic structural diagram of a Bluetooth transceiver device according to an embodiment of the present invention;

2 is a schematic structural diagram of a Bluetooth transceiver device according to Embodiment 2 of the present invention;

FIGS. ³ A to 3D are schematic structural diagram of the processing unit to transmit the digital processing unit of FIG. ^2; FIG 4 FIG 2 is a digital processing unit receives a schematic structural diagram of a processing unit;

5A to 5D are schematic structural diagrams of the digital demodulator of FIG. 4;

FIG. 6 is a schematic structural diagram of a Bluetooth transceiver device according to Embodiment 3 of the present invention. detailed description The invention provides a method for receiving and transmitting a Bluetooth signal, a Bluetooth transceiver device thereof and a Bluetooth communication device. The radio frequency unit of the broadband wireless communication device working in the same frequency band of the wireless communication device is used to realize the reception, transmission and processing of the Bluetooth signal, and it is not necessary to design a special radio unit for the Bluetooth, and does not affect the reception and transmission of the broadband signal. And processing, thereby reducing the implementation cost of Bluetooth, and correspondingly reducing the complexity and cost of the Bluetooth-enabled wireless communication device. The invention will be described in detail below with reference to the accompanying drawings.

Embodiment 1 . '

The present invention provides a Bluetooth transceiver device. As shown in FIG. 1, the Bluetooth transceiver device 100 includes: an antenna 101, a broadband wireless communication radio unit 102, a signal processing unit 103, and a higher layer protocol processing unit 104. Receiving a radio frequency signal containing complete Bluetooth radio frequency signal information from the air and transmitting the signal to the broadband wireless communication radio unit 102; receiving the radio frequency signal transmitted from the broadband wireless communication radio unit 102 and containing the complete Bluetooth radio frequency signal, radiating to In the air

The broadband wireless communication radio unit 102 is configured to receive the radio frequency signal transmitted by the antenna 101 and process it into an intermediate frequency or baseband signal including the complete benefit baseband signal, and then transmit the signal to the signal processing unit 103, where the bandwidth of the intermediate frequency or baseband signal is not less than The bandwidth of the Bluetooth baseband signal; the intermediate frequency or baseband signal transmitted by the received signal processing unit 103, processed and transmitted to the antenna 101;

The signal processing unit 103 receives the intermediate frequency or baseband signal from the broadband wireless communication radio unit 102 including the complete Bluetooth baseband signal, processes the signal, and then transmits the signal to the higher layer protocol processing unit 104; receives the control command transmitted by the higher layer protocol processing unit 104. And data, under the control of the control command, the data is processed into an intermediate frequency or baseband signal, and then transmitted to the broadband wireless communication radio unit 102;

The upper layer protocol processing unit 104 is connected to the host 105 and the signal processing unit 103, and at least includes a link control unit that receives the control command issued by the host 105 and the data to be sent, and processes the data. The control command and the processed data are transmitted to the signal processing unit 103; the data transmitted by the received signal processing unit 103 is processed and transmitted to the host 105. The control command issued by the link manager of the machine 105 and the data to be transmitted.

In this embodiment, the antenna 101 may be a Bluetooth-dedicated antenna or an antenna of other broadband wireless communication devices operating in the same frequency band. The WLAN antenna is employed in this embodiment, but is not limited thereto.

In this embodiment, instead of designing a dedicated radio frequency unit for Bluetooth, a radio frequency unit of a non-Bluetooth-dedicated broadband wireless communication device operating in the same frequency band is used, thereby realizing the reception, transmission, and processing of the Bluetooth signal, thereby reducing the radio frequency unit. The cost of Bluetooth implementation. The radio frequency unit can be used for the following conditions, that is, the frequency band includes the Bluetooth working frequency band, and the bandwidth of the input and output intermediate frequency or baseband signals is not less than the bandwidth of the Bluetooth baseband signal. In this embodiment, a WLAN radio unit can be used.

In addition, the broadband wireless communication radio unit 102 can also perform the reception, transmission, and processing of the wideband signal. This part is similar to the prior art and will not be described here.

In this embodiment, the broadband wireless communication radio unit 102 sequentially amplifies, downconverts, and filters the Bluetooth radio frequency signals from the antenna 101 in an amplifier, a down-conversion, and a filter, and then transmits the signals to the signal processing unit 103, where , the bandwidth of the filter is not less than the bandwidth of the Bluetooth baseband signal;

The broadband wireless communication radio frequency unit 102 receives the Bluetooth intermediate frequency or baseband signal from the signal processing unit 103, and utilizes a low noise amplifier (LNAN: Low No Ace if ier) in the WLAN radio frequency unit 102, a mixer, a phase locked loop. (PLL: Phase-locked Loop), automatic gain controller (AGC: Auto-gain Control) and filters to amplify, downconvert and filter the RF signal, and process the desired complete Bluetooth baseband The analog intermediate frequency/baseband signal of the signal information is transmitted to the signal processing unit ² 03; wherein the bandwidth of the filter is not less than the bandwidth of the Bluetooth baseband signal.

In addition, the upper layer protocol unit 104 may also include a link management unit, which is similar to the prior art and will not be described herein.

In this embodiment, the baseband signal can also be regarded as a special intermediate frequency signal, that is, an intermediate frequency signal with an intermediate frequency of zero. Hereinafter, unless otherwise specified, the intermediate frequency signal includes a case where the intermediate frequency is zero. Example 2

FIG. 1 is a schematic diagram of a Bluetooth transceiver 200 according to an embodiment of the present invention. The WLAN antenna 201, the WLAN radio unit 20 ² , the signal processing unit 203, and the upper layer protocol processing unit 204. In this embodiment, the signal processing unit 203 includes: an analog-to-digital converter (ADC) 203a, and a digital-to-analog converter 203b. And a digital processing unit 203c; wherein

An analog-to-digital converter (ADC) 203a is configured to receive an analog signal of the WLAN radio unit 202 including the Bluetooth intermediate frequency signal, perform analog-to-digital conversion, and transmit the analog signal to the digital processing unit 203c for processing;

The digital-to-analog converter (DAC) 203b receives the Bluetooth digital intermediate frequency signal transmitted by the digital processing unit 203c, performs digital-to-analog conversion, and transmits the signal to the WLAN radio unit 202.

In this embodiment, as shown in Fig. 2, the digital processing unit 203c includes a transmission processing unit and a reception processing unit. The receiving processing unit is coupled to the analog to digital converter 03a and the higher layer protocol processing unit 204; the transmitting processing unit is coupled to the digital to analog converter 203b and the higher layer protocol processing unit 204.

The transmitting processing unit in this embodiment may adopt a structure as shown in Figs. 3A to 3D, but is not limited thereto, and other structures may be employed.

As shown in FIG. 3A, a transmitting processing unit is configured to receive data transmitted by the higher layer protocol processing unit 204, perform bit stream processing, digitally modulate and become a digital baseband signal, and transmit the signal to a digital-to-analog converter DAC 203b; wherein, the transmitting processing unit is at least The method includes: a transmit bit stream processing unit 301 and a digital modulator 302; wherein

The transmit bit stream processing unit 301 is configured to receive the link control information and data transmitted by the higher layer protocol processing unit 204, and perform bit processing, that is, perform a header error check (HEC) or a loop redundancy according to the Bluetooth protocol. CRC: Cycl ic redundancy check, encryption, whitening, and channel coding;

The digital modulator 302 may be a GFSK (Gaussian Frequency Shift Keying) or a Differential Phase Shift Keying (DPSK) modulator, but is not limited thereto; The bit stream processing unit 301 is connected, receives the data processed by the transmit bit stream processing unit 301, performs digital GFSK or DPSK modulation, and then modulates the digital The baseband signal is sent to the digital-to-analog converter DAC2G3a to be converted into an analog signal.

As shown in FIG. 3B, the transmission processing unit 426 may include: a digital low pass filter (LPF:

Low-Pas s Fi l ter ) 303 , low-pass filtering the modulated baseband signal and transmitting it to the digital-to-analog converter. The DAC 203b converts the analog signal into an analog signal.

As shown in FIG. 3C, the transmission processing unit may further include a digital intermediate frequency (IF) upconverter 304; digitally frequency upconverting the filtered baseband signal, and then transmitting to a digital to analog converter (DAC:

Di gi ta l-to- Ana log Conver ter) 203b is converted into an analog signal.

Further, the transmission processing unit may also adopt a structure as shown in Fig. 3D.

In this embodiment, the receiving processing unit is configured to receive the signal transmitted by the analog-to-digital converter ADC 203a, perform digital intermediate frequency down-conversion, digital low-pass filtering on the signal, and perform digital demodulation and receive bit stream processing according to the time synchronization information. The link control information and the received data are obtained, and the link control information and the received data are transmitted to the higher layer protocol processing unit 204. The structure of the receiving processing unit is as shown in FIG.

As shown in FIG. 4, the receiving processing unit includes: a digital intermediate frequency down converter 401, a digital low pass filter (LPF) 402, a time synchronizer 403, a digital demodulator 404, and a received bit stream processor 405;

The digital intermediate frequency down converter 401 is configured to receive a signal transmitted by the analog-to-digital converter ADC 203a, and perform digital intermediate frequency down-conversion processing on the signal;

A digital low pass filter (LPF) 402 is connected to the digital intermediate frequency down converter 401 and the time synchronizer 403 and the digital demodulator 404, and receives the signal transmitted by the digital intermediate frequency down converter 401, and performs low pass filtering on the signal. To time synchronizer 403 and digital demodulator 404;

a time synchronizer 403, configured to obtain time synchronization information according to the low-pass filtered signal, and use the synchronization information to control an operation timing of the digital demodulator 404 and the received bit stream processor 405; the digital demodulator 404 is a GFSK or DPSK demodulator; coupled to a digital low pass filter (LPF) 402, a time synchronizer 403, and a receive bitstream processor 405 for receiving a digital low pass filtered signal and transmitting according to a time synchronizer 302c Synchronization information demodulates the signal and demodulates Signal is transmitted to the receive bitstream processor 405;

The receiving bit stream processor 405 is connected to the time synchronizer 403, and performs received bit stream processing on the received demodulated signal according to the synchronization information sent by the time synchronizer 403 to obtain received data and link control information, and The received data and link control information are transmitted to higher layer protocol processing unit 204.

As shown in Figs. 5A to 5D, it is a schematic structural diagram of the digital GFSK or DPSK demodulator in Fig. 4. As shown in Figure 5A, the GFSK or DPSK demodulator 302 includes:

a downsampling unit 501, a frequency offset correcting unit 502 connected to the downsampling unit 501, a differential detecting unit 503 connected to the frequency offset correcting unit 50 ² , and a determining unit 504 connected to the differential detecting unit 503, respectively, to a digital low pass filter The signal transmitted by 402 is subjected to downsampling, frequency offset correction, differential detection, and decision, and then transmitted to the received bit stream processor 405.

As shown in FIG. 5B, the GFSK or DPSK demodulator 404 may further include: a digital low pass filter (LPF) 505 disposed between the frequency offset correcting unit 502 and the differential detecting unit 503.

As shown in FIG. 5C, the GFSK or DPSK demodulator 404 may further include: an equalizer 506 disposed between the difference detecting unit 503 and the determining unit 504.

In addition, a structure as shown in FIG. 5D can also be adopted, and details are not described herein again.

Therefore, as shown in FIG. 5C, after the digital baseband signal of the digital low pass filter (LPF) 402 is sent to the digital GFSK or DPSK demodulator 404, the downsampling is first performed in the digital GFSK or DPSK demodulator 404, Obtain the Bluetooth baseband signal with lower sampling rate, perform frequency offset correction and further low-pass filtering, then perform differential detection and equalization, and finally judge the equalized signal to recover the desired data and send it to the received bit stream processing. 405 is further processed.

Among them, the above digital low pass filter (LPF) 505 and equalizer 506 are optional.

In this embodiment, the digital processing unit 203c may be implemented by an application specific integrated circuit (ASIC: Integrated Computing IC), or may be a programmable processor such as a digital signal processor (DSP: Digi ta l Signa l Proces sor). achieve.

In this embodiment, the structure shown in FIGS. 2, 3A to 3D, 4 and FIGS. 5A to 5C is used, but the present invention It is not limited to this structure, and other structures may be employed.

Embodiment 3

FIG. 6 is a schematic structural diagram of a Bluetooth transceiver 600 according to Embodiment 3 of the present invention. Compared with the second embodiment, in the embodiment, the signal processing unit 603 may further include: an analog filter, which is an analog low-pass filter or an analog band-pass filter (LPF/BPF) 603a in this embodiment. Between the WLAN RF unit 602 and the analog-to-digital converter ADC 603b, before the analog signal is sent to the ADC 603b, the bandwidth of the analog signal is reduced, and the out-of-band interference is suppressed;

In addition, other components of the WLAN antenna 601, the digital processing unit 603d, and the upper layer protocol unit 604 are the same as those in the first embodiment, and are not described herein again.

Embodiment 4

Hereinafter, a method of receiving and transmitting a Bluetooth signal of the present invention will be described with reference to the accompanying drawings.

The method is: receiving and/or transmitting a Bluetooth signal by using a radio frequency unit of a broadband wireless communication device operating in the same frequency band. Among them, it is not necessary to design a special radio unit for Bluetooth, and the reception, transmission and processing of the Bluetooth signal can be realized, thereby reducing the realization cost of the Bluetooth.

In addition, the radio frequency unit can be used for the following conditions, that is, the frequency band includes the Bluetooth working frequency band, and the bandwidth of the input and output intermediate frequency or baseband signals is not less than the bandwidth of the Bluetooth baseband signal. In this embodiment, the WLAN radio unit is used for description.

When receiving a Bluetooth signal, the flow is:

The WLAN antenna 201 receives the radio frequency signal containing the desired complete Bluetooth radio frequency signal information from the air: and transmits the signal to the WLAN radio unit 202;

WLAN radio unit ^²⁰² receives the RF signal, the RF unit 202 using the WLAN in the low noise amplifier (LNAN: Low Noi se Ampl if ier), a mixer, a phase locked loop (PLL: Phase-locked Loop) , an automatic gain The controller (AGC: Auto-Gain Control) and the filter amplify, downconvert, and filter the RF signal, and transmit the processed analog IF signal containing the desired complete Bluetooth baseband signal information to the signal processing. Unit 203;

The signal processing unit 203 processes the intermediate frequency signal, where the intermediate frequency signal is first The number is analog-to-digital converted in the analog-to-digital converter ADC ² 0 ³ a, and then sent to the digital processing unit ² 0 ³ c for processing to obtain link control information and received data;

As shown in Figures 2 and 4, the processing in the digital processing unit 203c includes:

The digital-to-analog down-conversion and digital low-pass filtering are performed on the analog-to-digital converted signals in the digital intermediate frequency downconverter 401 and the digital LPF 402; the time synchronization is obtained by the time synchronizer 403, and the low-pass filtered signal is obtained according to the time synchronization information. The digital GFSK or DPSK demodulator 404 and the received bit stream processor 405 perform digital demodulation and receive bit stream processing, and finally obtain link control information and received data, and transmit the null information and the received data to the higher layer protocol processing unit 204. The link control unit in the higher layer protocol processing unit 204 transmits the processing result to the host 205 after performing link control processing on the link control information and the received data according to the Bluetooth protocol specification.

The process of digitally demodulating the low-pass filtered signal is illustrated by using the demodulator shown in FIG. 5C as an example:

The signal transmitted by the low pass filter (LPF) 402 is downsampled in the downsampling unit 501; then in the frequency offset correcting unit 502, the digital low pass filter (LPF) 505, the differential detecting unit ⁵ 0 ³ , the equalizer 506, The decision unit 504 performs frequency offset correction, low pass filtering, differential detection, equalization, and decision, and transmits to the received bit stream processor 405.

In addition, as shown in FIG. 6, before performing analog-to-digital conversion on the intermediate frequency signal, the method further includes the steps of: performing low-pass or band-pass filtering on the intermediate frequency signal in the low-pass or band-pass filter 603a, where The bandwidth of the pass or band pass filter 603a is sufficiently wide to fully encompass the spectrum of the desired Bluetooth intermediate frequency signal. .

When transmitting a Bluetooth signal, the flow is:

The link control unit of the higher layer protocol processing unit 204 receives the control command, the link control information, and the data to be transmitted, and performs link control processing on the link control information and the data to be transmitted according to the Bluetooth protocol;

The signal processing unit 203 further processes the processed data into a Bluetooth intermediate frequency signal under the control of the control command; wherein the steps include: Transmit bit stream processing is performed in the transmit bit stream processor 301, that is, bit processing such as HEC/CRC, encryption, whitening, and channel coding according to the Bluetooth protocol; then, the digital GFSK/DPSK modulator 302 is connected for modulation to become a digital baseband signal. And then sent to the digital low pass filter (LPF) 303 and the digital intermediate frequency (IF) upconverter 304 for low pass filtering and intermediate frequency up conversion, and then enter the digital to analog converter DAC 203b for digital to analog conversion;

The digital-to-analog converted signal is processed by the WLAN radio unit 202, and the signal, filtering, up-conversion, and amplification are processed by the filter, the mixer, and the power amplifier in the WLAN radio unit 202, and then transmitted to the WLAN antenna. 201; Then, it is transmitted to the air by the WLAN antenna 201.

In the above embodiment, since the interval between the adjacent channels of the Bluetooth is 1 MHz, and the interval between the WLAN channels is usually 5 MHz, in order to obtain the up/down conversion of the Bluetooth signal by using the WLAN radio unit, the variable is adopted in this embodiment. The digital intermediate frequency (IF), thus obtaining the channel required for Bluetooth to be 1 MHz apart.

In the above embodiment, if the frequency synthesizer configured by the WLAN radio unit is used to obtain all carriers with a spacing of 1 MHz in the Bluetooth band, in this embodiment, a fixed digital intermediate frequency down-conversion is used for receiving, when transmitting. A fixed digital intermediate frequency upconversion is used. Among them, the frequency of the digital intermediate frequency/inverter can be set to zero, so that the WLAN radio unit can input/output the Bluetooth baseband signal. It is also possible to delete the digital intermediate frequency upconverter to directly send the digital modulated or digital low pass filtered signal to the digital to analog converter.

Example 5 '

The present invention also provides a Bluetooth communication device comprising a Bluetooth receiving device and a host; wherein the Bluetooth receiving device can employ the device shown in Fig. 2 or Fig. 5. I will not repeat them here.

It can be seen from the above that the present invention utilizes the existing radio frequency unit of the broadband communication in the same frequency band of the wireless communication device to realize the reception, transmission and processing of the Bluetooth signal, and does not need to design a special radio unit for the Bluetooth, thereby reducing the Bluetooth. The cost of implementation also correspondingly reduces the cost and complexity of Bluetooth-enabled wireless communication devices.

The above examples are merely illustrative of the invention and are not intended to limit the invention.

Claims

Claim

A Bluetooth signal receiving and transmitting method, characterized in that a Bluetooth signal is received and/or transmitted by a radio frequency unit of a broadband wireless communication device operating in the same frequency band.

The method for receiving and transmitting a Bluetooth signal according to claim 1, wherein when the Bluetooth signal is received, the method comprises the steps of:

Receiving a radio frequency signal containing information of a Bluetooth radio frequency signal from the air;

The radio frequency unit processes the radio frequency signal into an intermediate frequency or baseband signal including Bluetooth baseband signal information; the bandwidth of the intermediate frequency or baseband signal is not less than a bandwidth of the Bluetooth baseband signal; and processing the intermediate frequency or baseband signal to obtain Bluetooth link control information and receiving data; '

The received data is further processed according to the link control information, and the processing result is transmitted to the host.

The method for receiving and transmitting a Bluetooth signal according to claim 2, wherein the processing the intermediate frequency or baseband signal comprises the steps of:

Performing analog to digital conversion on the intermediate frequency or baseband signal;

Performing digital intermediate frequency down-conversion and digital filtering on the analog-to-digital converted signal;

Digitally demodulating the filtered signal according to time synchronization information;

The demodulated signal is subjected to receive bit stream processing.

The method for receiving and transmitting a Bluetooth signal according to claim 3, wherein the digitally demodulating the filtered signal comprises the steps of:

Perform downsampling and frequency offset correction;

Perform differential detection;

Make a judgment.

The Bluetooth signal receiving and transmitting method according to claim 4, further comprising the step of: performing digital filtering before performing differential detection.

The Bluetooth signal receiving and transmitting method according to claim 4, wherein After the line difference detection, the method further includes the steps of: equalizing the signal after the differential detection.

The Bluetooth signal receiving and transmitting method according to claim 3, further comprising the step of: filtering the intermediate frequency or baseband signal before performing analog-to-digital conversion on the intermediate frequency or baseband signal.

The method for receiving and transmitting a Bluetooth signal according to claim 1, wherein when the Bluetooth signal is transmitted, the method comprises the steps of:

Receiving control commands, link control information, and data to be sent by the host, and processing the link control information and the data to be sent;

The processed data is further processed into an intermediate frequency or baseband signal under the control of the control command;

Processing the intermediate frequency or baseband signal in the radio frequency unit to obtain a radio frequency signal including Bluetooth radio frequency signal information;

Then, the obtained radio frequency signal is transmitted into the air.

The method for receiving and transmitting a Bluetooth signal according to claim 8, wherein the processed data is further processed under the control of the control command, including the steps of:

Performing bit stream processing;

Digitally modulating the processed data to become a digital baseband signal;

Digital-to-analog conversion of digital signals.

The Bluetooth signal receiving and transmitting method according to claim 9, further comprising the step of: digitally filtering the digitally modulated signal before performing digital-to-analog conversion on the digital signal.

The method for receiving and transmitting a Bluetooth signal according to claim 9, wherein before performing digital-to-analog conversion on the digital signal, the method further comprises the step of: performing digital intermediate frequency up-conversion on the digitally modulated signal.

12. A Bluetooth transceiver device, comprising: an antenna, a signal processing unit, and a high layer protocol unit; wherein the method further includes: a radio frequency unit, connected to the signal processing unit and the antenna, and having no broadband The line communication radio unit is configured to receive the radio frequency signal transmitted by the antenna and process it into an intermediate frequency or baseband signal, and then transmit the signal to the signal processing unit; and receive the intermediate frequency or baseband signal sent by the signal processing unit, and process the signal to the antenna.

The Bluetooth transceiver device according to claim 12, wherein the bandwidth of the intermediate frequency or baseband signal is not less than the bandwidth of the Bluetooth baseband signal.

The Bluetooth transceiver device according to claim 12, wherein the signal processing unit comprises: an analog to digital converter, a digital to analog converter, and a digital processing unit;

An analog-to-digital converter for receiving an intermediate frequency or baseband signal from a broadband wireless communication radio unit, performing analog-to-digital conversion, and transmitting to an digital processing unit for processing;

0 digital-to-analog converter, receiving the intermediate frequency or baseband signal transmitted by the digital processing unit, performing digital-to-analog conversion and transmitting to the broadband wireless communication radio unit;

The digital processing unit is configured to receive the signal transmitted by the analog-to-digital converter, perform digital intermediate frequency down-conversion and digital filtering on the signal, and perform digital demodulation and receiving bit stream processing according to the time synchronization information to obtain link control information and received data. And transmitting the link control information and the received data to a high Layer 5 protocol processing unit;

And it is used for receiving data transmitted by the upper layer protocol processing unit, performing bit stream processing, digitally modulating, and then transmitting to a digital-to-analog converter.

The Bluetooth transceiver device according to claim 14, wherein the digital processing unit comprises a receiving processing unit and a transmitting processing unit;

0 receiving processing unit for receiving the signal transmitted by the analog-to-digital converter, and performing the signal in the digital

Frequency down conversion, digital filtering, and digital demodulation and receiving bit stream processing according to time synchronization information to obtain link control information and received data, and transmitting the link control information and the received data to a higher layer protocol processing unit;

The transmitting processing unit is configured to receive data transmitted by the upper layer protocol processing unit, perform transmission bit 5 stream processing, digitally modulate and become a baseband signal, and transmit the signal to the digital to analog converter.

The Bluetooth transceiver according to claim 15, wherein the transmission processing The unit includes: a transmit bit stream processing unit and a digital modulator; wherein

a transmitting bit stream processing unit, configured to receive data transmitted by a higher layer protocol processing unit, and perform bit processing;

The digital modulator is connected to the transmitting bit stream processing unit, receives the data processed by the transmitting bit stream processing unit, performs digital modulation into a baseband signal, and transmits the data to the digital-to-analog converter.

The Bluetooth transceiver device according to claim 16, wherein the transmission processing unit further comprises a digital filter disposed between the digital modulator and the digital-to-analog converter to filter the modulated baseband signal. And transferred to the digital to analog converter.

The Bluetooth transceiver device according to claim 16, wherein the transmission processing unit further comprises a digital intermediate frequency up-converter disposed between the digital modulator and the digital-to-analog converter to perform the modulated baseband signal. The digital intermediate frequency is upconverted and transmitted to a digital to analog converter.

The Bluetooth transceiver device according to claim 17, wherein the transmission processing unit further comprises a digital intermediate frequency up-converter disposed between the digital filter and the digital-to-analog converter to perform the filtered baseband signal. The digital intermediate frequency is upconverted and transmitted to a digital to analog converter.

The Bluetooth transceiver device according to claim 15, wherein the receiving processing unit comprises: a digital intermediate frequency down converter, a digital filter, a time synchronizer, a digital demodulator, and a received bit stream processor; ,

The digital intermediate frequency down converter is configured to receive a signal transmitted by the analog to digital converter, and perform digital intermediate frequency down conversion processing on the signal;

The digital filter is connected with the digital intermediate frequency down converter and the time synchronizer and the digital demodulator, and receives the signal transmitted by the digital intermediate frequency down converter, filters the signal and transmits the signal to the time synchronizer and the digital demodulator;

a time synchronizer that obtains time synchronization information based on the filtered signal and transmits the synchronization information to a digital demodulator and a received bit stream processor for timing control;

a digital demodulator, connected to the digital filter, the time synchronizer and the receiving bit stream processor, for receiving the digitally filtered signal, and performing the signal according to the synchronization information sent by the time synchronizer Demodulating, and transmitting the demodulated signal to a receive bitstream processor;

Receiving a bit stream processor, connecting with a time synchronizer, performing received bit stream processing on the received demodulated signal according to synchronization information sent by the time synchronizer, obtaining received data, and transmitting the received data to a higher layer protocol processing unit.

The Bluetooth transceiver device according to claim 20, wherein the digital demodulator comprises at least: a downsampling unit, a frequency offset correcting unit connected to the downsampling unit, and differential detection connected to the frequency offset correcting unit. The unit and the decision unit connected to the differential detecting unit respectively perform downsampling, frequency offset correction, differential detection and decision on the signal transmitted by the digital filter, and then transmit to the receiving bit stream processor.

The Bluetooth transceiver device according to claim 21, wherein the digital demodulator further comprises a digital filter disposed between the frequency offset correction unit and the differential detection unit.

The Bluetooth transceiver device according to claim 21, wherein the digital demodulator further comprises an equalizer disposed between the difference detecting unit and the determining unit.

The Bluetooth transceiver device according to claim 14, wherein the signal processing unit further comprises an analog filter disposed between the broadband wireless communication radio unit and the analog to digital converter.

The Bluetooth transceiver device according to claim 12, wherein the antenna is a Bluetooth antenna or an antenna for broadband wireless communication communication.

The Bluetooth transceiver device according to claim 12, wherein the higher layer protocol processing unit is connected to the host and the signal processing unit, and at least includes a link control unit, and the link control unit receives the control command issued by the host. And the data to be sent, and the data is processed, the control command and the processed data are transmitted to the signal processing unit; the signal transmitted by the signal processing unit is received, processed, and transmitted to the host.

27. A Bluetooth communication device, comprising: a Bluetooth transceiver device and a host; wherein, the Bluetooth transceiver device comprises: an antenna, a broadband wireless communication radio unit, a signal processing unit, and a high layer protocol processing unit;

An antenna for receiving a radio frequency signal including Bluetooth radio frequency signal information from the air, and the signal The number is transmitted to the broadband wireless communication radio unit; the radio frequency signal transmitted from the broadband wireless communication radio unit is received and transmitted to the air;

The broadband wireless communication radio unit is configured to receive the radio frequency signal transmitted by the antenna and process it into an intermediate frequency or baseband signal, and then transmit the signal to the signal processing unit; the intermediate frequency or baseband signal sent by the receiving signal processing unit is processed and transmitted to the antenna; The bandwidth of the intermediate frequency or baseband signal is not less than the bandwidth of the Bluetooth baseband signal;

a high-level protocol processing unit, connected to the host and the signal processing unit, at least comprising a link control unit, the link control unit receives the control command and the data to be sent by the host, processes the data under the control of the control command, and then The signal is sent to the signal processing unit; the signal transmitted by the signal processing unit is received, processed, and transmitted to the host.

The Bluetooth communication device according to claim 27, wherein the signal processing unit comprises: an analog to digital converter, a digital to analog converter, and a digital processing unit;

The digital-to-analog converter receives the intermediate frequency or baseband signal transmitted by the digital processing unit, performs digital-to-analog conversion, and transmits the signal to the broadband wireless communication radio unit;

a digital processing unit, comprising a receiving processing unit and a transmitting processing unit; wherein

a receiving processing unit, configured to receive a signal transmitted by the analog-to-digital converter, perform digital intermediate frequency down-conversion and digital filtering on the signal, and perform digital demodulation and receiving bit stream processing according to the time synchronization information to obtain received data, and receive the received data. Data is transferred to a higher layer protocol processing unit;

The transmitting processing unit is configured to receive data transmitted by the upper layer protocol processing unit, perform transmit bit stream processing, digitally modulate, and become a baseband signal, and transmit the signal to the digital to analog converter.

The Bluetooth communication device according to claim 28, wherein the transmission processing unit comprises: a transmission bit stream processing unit and a digital modulator;

The Bluetooth communication device according to claim 28, wherein the reception processing unit comprises: a digital intermediate frequency down converter, a digital filter, a time synchronizer, a digital demodulator, and a received bit stream processor; ,

a digital demodulator, connected to the digital filter, the time synchronizer, and the receiving bit stream processor, for receiving the digitally filtered signal, and demodulating the signal according to the synchronization information sent by the time stepper, and The demodulated signal is transmitted to the receiving bit stream processor;

The Bluetooth communication device according to claim 28, wherein the signal processing unit further comprises an analog filter disposed between the broadband wireless communication radio unit and the analog to digital converter.