TWI416880B - Rf signal receiving apparatus and method - Google Patents

Abstract

A RF signal receiving apparatus is disclosed herein. The RF signal receiving apparatus comprises an antenna, a plurality of signal magnitude adjusting circuits, a selecting module, a tuner, a demodulator, a decoder and a control module. Each signal magnitude adjusting circuits receives the RF signal from the antenna to generate a magnitude-adjusted signal. The selecting module connects to one of the signal magnitude adjusting circuits according to a selecting signal and sends the corresponding magnitude-adjusted signal to the tuner such that the tuner generates a tuned signal and a first signal state parameter. The demodulator generates a demodulated signal and a second signal state parameter. The decoder generates a decoded signal and a third signal state parameter. The control module retrieves the first, second and third signal state parameters to generate the selecting signal. A RF signal receiving method is disclosed herein as well.

Description

RF signal receiving device and method

The present disclosure relates to an electrical communication technology, and more particularly to an RF signal receiving apparatus and method.

Wireless transmission technology provides a more convenient conduit for modern information exchange. Generally, when the signal is received, in order to meet the signal intensity working range that the tuner can receive, it is necessary to increase or decrease the intensity of the signal after the antenna receives the radio frequency (RF) signal. For example, if the intensity of the RF signal received by the antenna is X, the intensity of the signal is increased or decreased to M, and the working range of the tuner is between Y and Y+d, the designer must conform to the following formula:

If the above formula is rewritten as , you can know that the tuner can receive the weakest signal strength as YM, and can receive the strongest signal strength as Y+dM. Therefore, if you want to receive a smaller signal, it is necessary to lower the M, but this will make it possible to receive the strongest signal strength drop, but not the strong signal, and vice versa. Therefore, it is often necessary to sacrifice one end and not both.

Therefore, how to design a new RF signal receiving device and RF signal receiving method to increase the range of receivable signal strength is an urgent problem to be solved in the industry.

Therefore, one aspect of the disclosure is to provide an RF signal receiving apparatus, including: an antenna, a plurality of signal strength adjusting circuits, a selecting module, a tuner, a demodulator, a decoder, and a control module. The antenna is used to receive an RF signal. The signal strength adjustment circuit is configured to receive the RF signal to generate the intensity-adjusted signal. The selection module is configured to receive the selection signal. The tuner is connected to the selection module, and the selection module is connected to one of the signal strength adjustment circuits according to the selection signal to transmit the corresponding intensity-adjusted signal to the tuner, so that the tuner generates the tuned signal and the first signal state parameter. The demodulator generates a demodulated signal and a second signal state parameter according to the tuned signal. The decoder generates a decoded signal and a third signal state parameter according to the demodulated signal. The control module generates a selection signal according to at least one of the first, second, and third signal state parameters.

According to an embodiment of the present disclosure, the selection module is a plurality of power switches respectively corresponding to one of the signal strength adjustment circuits, and the selection signal system controls the power switch corresponding to the selected signal strength adjustment circuit to be turned on.

According to another embodiment of the present disclosure, the selection module is a switch, and includes a plurality of input switches respectively corresponding to one of the signal strength adjustment circuits, and the selection signal is used to control the input switch corresponding to the selected signal strength adjustment circuit to be closed. .

According to still another embodiment of the present disclosure, the selection module includes a plurality of power switches and switches, and the signal strength adjustment circuit is divided into a first group and a second group, and the power switches respectively correspond to the signals in the first group. One of the intensity adjustment circuits, the switch includes a plurality of input switches respectively corresponding to one of the signal strength adjustment circuits in the second group, and the selection signal controls the power switch corresponding to the selected signal strength adjustment circuit to open or correspond The input switch is turned off.

According to an embodiment of the present disclosure, the control module determines the signal strength according to at least one of the first, second, and third signal state parameters to generate a selection signal.

According to another embodiment of the present disclosure, the signal strength adjustment circuit includes at least one signal strength gain circuit, at least one signal strength attenuation circuit, and at least one bypass circuit. At least one of the first, second, and third signal state parameters includes a noise ratio, a bit error rate, and an automatic gain control parameter.

Another aspect of the present disclosure is to provide a method for receiving an RF signal, comprising the steps of: receiving an RF signal; and selecting, by a plurality of signal strength adjustment circuits, a preset intensity adjustment signal generated by the preset signal strength adjustment circuit; Adjusting the signal according to the preset intensity to generate the tuned signal and the first signal state parameter by the tuner; generating the demodulated signal and the second signal state parameter by the demodulator according to the tuned signal; The decoder generates the decoded signal and the third signal state parameter; generates a selection signal according to at least one of the first, second, and third signal state parameters; and adjusts the intensity generated by one of the signal strength adjustment circuits according to the selection signal The signal is sent to the tuner to generate a tuned signal according to the intensity adjusted signal.

According to another embodiment of the present disclosure, the step of generating a selection signal according to at least one of the first, second, and third signal state parameters determines the signal strength according to at least one of the first, second, and third signal state parameters. To generate a selection signal.

According to still another embodiment of the present disclosure, the signal strength adjustment circuit includes at least one signal strength gain circuit, at least one signal strength attenuation circuit, and at least one bypass circuit. The signal status parameters include the noise ratio, the bit error rate, and the automatic gain control parameters.

The advantage of applying the disclosure is that the state of the signal is monitored by the control module, and the optimal signal strength adjustment circuit is selected according to the condition to adjust the intensity of the signal, thereby increasing the range of the received signal strength, and easily achieving the above. The purpose.

Please refer to FIG. 1 , which is a block diagram of an RF signal receiving apparatus 1 according to an embodiment of the present disclosure. The RF signal receiving apparatus 1 includes an antenna 100, a plurality of signal strength adjusting circuits 102, a selection module 104, a tuner 106, a demodulator 108, a decoder 110, and a control module 112.

The antenna 100 is configured to receive the RF signal 101. The signal strength adjustment circuit 102 is configured to receive the RF signal 101 to generate the intensity-adjusted signal 103. Each signal strength adjustment circuit 102 will have an adjustment parameter. The signal strength adjustment circuit 102 essentially includes a signal strength gain circuit, a signal strength attenuation circuit, and a bypass circuit (not shown). The adjustment parameter of the signal strength gain circuit is a positive value for increasing the intensity of the RF signal 101. The adjustment parameter of the signal strength attenuation circuit is a negative value, so that the intensity of the RF signal 101 is weakened, and the adjustment parameter of the bypass circuit is 0. The intensity of the RF signal 101 is not adjusted, and the signal of the original intensity is output.

In essence, one of the signal strength adjustment circuits 102 will be a preset signal strength adjustment circuit 102. When the entire RF signal receiving device 1 starts to operate, the selection module 104 first selects the preset signal strength adjusting circuit 102 to connect the selection module 104 to the preset signal strength adjusting circuit 102, and The preset intensity-adjusted signal 103 generated by the signal strength adjustment circuit 102 is output to the tuner 106 connected to the selection module 104.

The tuner 106 generates the tuned signal 105 and the first signal state parameter 105' according to the intensity adjusted signal 103, and the demodulator 108 generates the demodulated signal 107 and the second signal state parameter 107' according to the tuned signal 105 to decode The device 110 generates the decoded signal 109 and the third signal state parameter 109' according to the demodulated signal 107. The control module 112 generates the selection signal 111 based on at least one of the first, second, and third signal state parameters 105', 107', and 109'. The first, second, and third signal state parameters 105', 107', and 109' may include a noise ratio, a bit error rate, and an automatic gain control parameter, or other parameters, for the control module 112 to determine the current antenna. The received signal strength of 100 is strong or weak. Based on the signal strength, the control module 112 will generate the selection signal 111 to the selection module 104. The selection module 104 will select the appropriate signal strength adjustment circuit 102 according to the selection signal 111 to transmit the signal strength to work with the tuner 106. The intensity of the range is adjusted to signal 103 to tuner 106.

In an embodiment, the control module 112 can determine the difference between the adjusted signal strength of the preset signal strength adjustment circuit 102 and the maximum or minimum value of the working range of the tuner 106, and is determined by each signal strength adjustment circuit 102. The parameters are adjusted to determine the most suitable signal strength adjustment circuit 102. Therefore, the selection signal 111 generated by the control module 112 can directly select the most suitable signal strength adjustment circuit 102 for the selection module 104 to directly output the intensity-adjusted signal 103 whose intensity is consistent with the working range of the tuner 106. There is no need to adjust step by step as in the above embodiment.

The selection module 104 can be implemented in different ways in different embodiments. Please refer to FIG. 2A , which is a block diagram of the signal strength adjustment circuit 102 , the selection module 104 , and the tuner 106 in an embodiment of the disclosure. In this embodiment, the selection module 104 is a plurality of power switches 104, which are respectively disposed corresponding to one of the signal strength adjustment circuits 102. When the power switch 104 is turned on, the corresponding signal strength adjusting circuit 102 can output the intensity-adjusted signal 103, and when the power switch 104 is turned off, the corresponding signal strength adjusting circuit 102 does not output the intensity-adjusted signal 103. As shown in FIG. 2A, each signal strength adjustment circuit 102 receives the RF signal 101, and the selection signal 111 causes the power switch 104 of the second signal strength adjustment circuit 102 to be turned on, so that the selected signal strength adjustment circuit 102 will pass through The line shows the path output intensity adjusted signal 103 to the tuner 106. The other signal strength adjustment circuit 102 is not selected after the dotted line, and the intensity adjusted signal 103 is not output to the tuner 106.

Please refer to FIG. 2B , which is a block diagram of the signal strength adjustment circuit 102 , the selection module 104 , and the tuner 106 in another embodiment of the disclosure. In this embodiment, the selection module 104 is a switch 104, and includes a plurality of input switches 104a corresponding to one of the signal strength adjustment circuits 102, respectively. When the input switch 104a is turned off, the corresponding signal strength adjustment circuit 102 can output the intensity-adjusted signal 103, and when the input switch 104a is turned on, the corresponding signal strength adjustment circuit 102 does not output the intensity-adjusted signal 103. As shown in FIG. 2B, each signal strength adjustment circuit 102 receives the RF signal 101, and the selection signal 111 (not shown in FIG. 2B) will cause the input switch 104a of the first signal strength adjustment circuit 102 to be turned off, thus being selected. The signal strength adjustment circuit 102 will output the intensity adjusted signal 103 to the tuner 106 via this path.

Please refer to FIG. 2C , which is a block diagram of the signal strength adjustment circuit 102 , the selection module 104 , and the tuner 106 in still another embodiment of the disclosure. In this embodiment, the signal strength adjustment circuit 102 can be divided into a first group and a second group. As shown in FIG. 2C, the above two signal strength adjustment circuits 102 are the first group, and the others are the second group. The signal intensity adjustment circuit 102 of the first group is controlled by the power switch 104b, and the signal strength adjustment circuit 102 of the second group is controlled by the switch 104c, and both are based on the selection signal 111 (not shown in the 2C). Figure) to select one of the paths to output the intensity adjusted signal 103.

Please refer to FIG. 3 , which is a flowchart of a method for receiving an RF signal according to still another embodiment of the disclosure. The RF signal receiving method can be applied to the RF signal receiving apparatus 1 as shown in FIG. The RF signal receiving method includes the following steps: In step 301, the RF signal 101 is received by the antenna 100. Next, in step 302, the preset intensity-adjusted signal 103 generated by the preset signal strength adjustment circuit 102 is selected from the plurality of signal strength adjustment circuits 102. Next, in step 303, the post signal 103 is adjusted according to the preset intensity, and the tuner 105 and the first signal state parameter 105' are generated by the tuner. In step 304, the demodulated signal 107 and the second signal state parameter 107' are generated by the demodulator based on the tuned signal 105. In step 305, the decoded signal 109 and the third signal state parameter 109' are generated by the decoder 110 according to the demodulated signal 107.

In step 306, the control module 112 generates the selection signal 111 based on the first, second, and third signal state parameters 105', 107', 109'. In step 307, the intensity-adjusted signal 103 generated by one of the signal strength adjustment circuits 102 is transmitted to the tuner 106 according to the selection signal 111, and after the transmission strength adjustment signal 103 is sent to the tuner 106, step 304 is repeatedly executed. .

The advantage of the application of the present disclosure is that the state of the signal is monitored by the control module 112, and the optimal signal strength adjustment circuit 102 is selected according to the situation to adjust the intensity of the signal, and the range of the received signal strength can be increased.

The present disclosure has been disclosed in the above embodiments, but it is not intended to limit the disclosure, and any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the disclosure. The scope of protection of the disclosure is subject to the definition of the scope of the patent application.

1. . . RF signal receiving device

100. . . antenna

101. . . RF signal

102. . . Signal strength adjustment circuit

103. . . Intensity adjusted signal

104. . . Selection module

104a. . . Input switch

104b. . . switch

104c. . . Switcher

105. . . Tuned signal

105’. . . First signal status parameter

106. . . tuner

107. . . Demodulated signal

107’. . . Second signal status parameter

108. . . Demodulator

109. . . Decoded signal

109’. . . Third signal status parameter

110. . . decoder

111. . . Select signal

112. . . Control module

301-306. . . step

The above and other objects, features, advantages and embodiments of the present disclosure will become more apparent and understood.

1 is a block diagram of an RF signal receiving apparatus according to an embodiment of the present disclosure;

2A is a block diagram of a signal strength adjustment circuit, a selection module, and a tuner in an embodiment of the disclosure;

2B is a block diagram of a signal strength adjustment circuit, a selection module, and a tuner in another embodiment of the disclosure;

2C is a block diagram of a signal strength adjustment circuit, a selection module, and a tuner in still another embodiment of the disclosure;

FIG. 3 is a flow chart of a method for receiving an RF signal according to still another embodiment of the disclosure.

1. . . RF signal receiving device

100. . . antenna

101. . . RF signal

102. . . Signal strength adjustment circuit

103. . . Intensity adjusted signal

104. . . Selection module

105. . . Tuned signal

105’. . . First signal status parameter

106. . . tuner

107. . . Demodulated signal

107’. . . Second signal status parameter

108. . . Demodulator

109. . . Decoded signal

109’. . . Third signal status parameter

110. . . decoder

111. . . Select signal

112. . . Control module

Claims (11)

An RF signal receiving device includes: an antenna for receiving an RF signal; a plurality of signal strength adjusting circuits for receiving the RF signal to generate an intensity-adjusted signal; and a selection module for receiving a signal Selecting a signal; a tuner is connected to the selection module, wherein the selection module is connected to one of the signal strength adjustment circuits according to the selection signal to transmit the corresponding intensity-adjusted signal to the tuner, The tuner generates a tuned signal and a first signal state parameter; a demodulator generates a demodulated signal and a second signal state parameter according to the tuned signal; a decoder is based on the solution The modulating signal generates a decoded signal and a third signal state parameter; and a control module generates the selection signal according to at least one of the first, second, and third signal state parameters. The RF signal receiving device of claim 1, wherein the selection module is a plurality of power switches respectively corresponding to one of the signal strength adjustment circuits, wherein the selection signal controls the selected signal strength adjustment circuit Corresponding to the power switch is turned on. The RF signal receiving device of claim 1, wherein the selection module is a switch, and the corresponding signal strength is adjusted respectively. One of the plurality of input switches of the circuit, the selection signal controls that the input switch corresponding to the selected signal strength adjustment circuit is turned off. The RF signal receiving device of claim 1, wherein the selection module comprises a plurality of power switches and a switch, wherein the signal strength adjusting circuits are divided into a first group and a second group, The power switches respectively correspond to one of the signal strength adjustment circuits in the first group, and the switch includes a plurality of input switches respectively corresponding to one of the signal strength adjustment circuits in the second group, The selection signal controls whether the power switch corresponding to the selected signal strength adjustment circuit is turned on or the corresponding input switch is turned off. The RF signal receiving device of claim 1, wherein the control module determines a signal strength based on at least one of the first, second, and third signal state parameters to generate the selection signal. The RF signal receiving device of claim 1, wherein the signal strength adjusting circuit comprises at least one signal intensity gain circuit, at least one signal intensity attenuation circuit, and at least one bypass circuit. The RF signal receiving device of claim 1, wherein the first, second, and third signal state parameters include a noise ratio, a bit error rate, and an automatic gain control parameter. An RF signal receiving method includes the following steps: Receiving an RF signal; selecting a preset intensity adjustment signal generated by a preset signal strength adjustment circuit from the plurality of signal strength adjustment circuits; and adjusting a signal according to the preset intensity to generate a tuned signal by using a tuner And a first signal state parameter; generating, by the demodulator, a demodulated signal and a second signal state parameter according to the tuned signal; and generating, by the decoder, a decoded signal according to the demodulated signal And a third signal status parameter; generating a selection signal according to at least one of the first, second, and third signal status parameters; and transmitting one of the intensity adjustments generated by one of the signal strength adjustment circuits according to the selection signal The signal is sent to the tuner to generate the tuned signal according to the adjusted signal. The RF signal receiving method of claim 8, wherein the step of generating the selection signal according to at least one of the first, second, and third signal state parameters is based on the first, second, and third signal state parameters At least one of the levels determines a signal strength to generate the selection signal. The RF signal receiving method of claim 8, wherein the signal strength adjusting circuit comprises at least one signal intensity gain circuit, at least one signal intensity attenuation circuit, and at least one bypass circuit. The radio frequency signal receiving method of claim 8, wherein the signal status parameters include a noise ratio, a one-bit error rate, and an automatic gain control parameter.