CN103297067A - Radio frequency control device and control method thereof - Google Patents

Abstract

The invention discloses a wireless communication radio frequency control module with a self-correcting function, comprising: a signal receiving unit (101), a signal receiving situation feedback unit (102), a signal threshold control unit (103), a signal value filtering unit ( 104), a control value storage unit (105), a control signal generation enabling unit (106) and a control signal generation unit (107). The wireless communication radio frequency control module of the present invention can effectively judge and feed back whether a valid signal is received when the connection between the communication baseband module and the communication radio frequency module is interfered, and effectively process the received signal to generate a signal waveform Control the communication radio frequency module.

Description

Radio frequency control device and control method thereof

technical field

The present application relates to the field of radio frequency technology in the communication industry, and in particular to a radio frequency control device and a control method thereof.

Background technique

A wireless communication system is generally divided into a communication baseband module, a radio frequency control device, and a communication radio frequency module. Among them, the communication baseband module is responsible for source coding and source decoding; the communication radio frequency module is responsible for channel coding and channel decoding, including modulation sub-modules and demodulation sub-modules. Due to changes in the communication environment, the communication baseband module will modify the parameters of the communication radio frequency module. These parameters include but are not limited to setting the power parameters of the modulation sub-module, the gain parameters of the demodulation sub-module, and Frequency fine-tuning parameters of the modulation sub-module and demodulation sub-module, etc.

FIG. 1 is a schematic diagram of the location of a radio frequency control device in a wireless communication system in the prior art. As shown in Figure 1, the front end of the radio frequency control device 100 is connected with the communication baseband module 200, receives the baseband control signal from the communication baseband module 200, and feeds back the signal reception situation to the communication baseband module according to the reception situation of the signal; The communication radio frequency module 300 is connected to each other, and after it properly processes the received baseband control signal, converts it into a radio frequency control signal of a corresponding format, and then sends it to the communication radio frequency module.

The traditional radio frequency control device is mainly divided into two parts: the receiving sub-module and the digital control signal generating sub-module. The receiving submodule is responsible for receiving the baseband control signal transmitted by the baseband and buffering it in the memory. The control signal generating submodule is responsible for converting the received baseband control signal into the control signal waveform (such as SPI Standard signal or I2C standard signal), that is, the traditional radio frequency control device will directly convert the received baseband control signal into the control waveform of the modulation sub-module or demodulation sub-module.

In a real communication system, the connection mode (cable connection or board-level connection) between the communication baseband module and the communication radio frequency module will be greatly interfered, resulting in the communication radio frequency control device not receiving valid signals or receiving wrong signals: if If the signal cannot be received, the communication radio frequency module cannot be effectively controlled; if the wrong signal is received and these signals are directly converted into control signals and sent to the modulation sub-module or demodulation sub-module in the communication radio frequency module, such as the modulation sub-module The sudden jump of the transmit power of the module, the sudden jump of the receiving gain of the demodulation sub-module, or the irregular frequency jump of the modulation sub-module and the demodulation sub-module.

Taking the format of the baseband control signal as an SPI standard signal as an example, the SPI signal is a synchronous serial peripheral interface bus, which enables the processor to communicate with various peripheral devices in a serial manner, and the working mode is master-slave Mode. SPI is a high-speed, full-duplex synchronous communication bus. There are four buses in total, namely CLK (clock signal), ~CS (signal enable signal), MOSI (master output/slave input), MISO (Master In/Slave Out). Both MISO and MOSI transmit data signals, and are collectively referred to as DATA signals hereinafter. FIG. 2 is a timing diagram of a standard SPI signal and an error SPI signal in the prior art. The SPI signal standard stipulates that valid data is sampled by the rising edge of the clock (see the CLK signal in Figure 2) when the enable signal is valid (generally low level, see the ~CS signal in Figure 2), and the DATA signal is sampled at other times (not When transmitting data) is generally kept at a high level.

The upper part of Figure 2 is the timing diagram of the standard SPI signal. If the DATA signal is transmitted with the highest bit priority, the signal transmitted by the level of the "original SPI signal" shown in the upper part of Figure 2 is 8-bit binary data 0b00101011 (expressed as 0x2B in hexadecimal, expressed in decimal for 43).

倍)，这对本地和与之通信的无线通信系统都将造成非常严重的影响。The lower part of Figure 2 is the timing diagram of the wrong SPI signal. Compared with the DATA signal of the same quality (see "level signal" in the lower part of Figure 3), due to the misalignment of the CLK signal and the ~CS signal (relative to the DATA signal), the highest bit '0' is not sampled, because the DATA signal Keep at high level at other times, and the final sampling result is 8-bit binary data 0b01010111 (0x57 in hexadecimal, 87 in decimal). If this data is used to control the RF signal gain of the modulation sub-module (power value in dB), if the data is misrepresented from 43 to 87, the gain will increase by about 15848 times for the power signal (ie

times), which will have a very serious impact on the local and wireless communication systems communicating with it.

Contents of the invention

(1) Technical problems to be solved

In view of the above-mentioned one or more problems existing in the prior art, the present invention proposes a communication radio frequency module control device and its control method, in order to control the The digital signal is effectively processed to avoid improper control of the modulation sub-module or demodulation sub-module.

(2) Technical solution

According to one aspect of the present invention, a radio frequency control device is provided, the front end of which is connected to the communication baseband module, and the rear end thereof is connected to the communication radio frequency module. The device includes: a signal receiving unit, connected to the communication baseband module, used to obtain the current signal value from the communication baseband module; a signal receiving situation feedback unit, used to send the current signal to the signal threshold control unit when the current signal value is valid Value; signal threshold control unit, used to calculate the difference between the current signal value and the last filter result in its first buffer, if the difference is greater than the signal value comparison threshold and the cumulative number of times the difference is greater than the signal value comparison threshold is less than the signal When the error counts threshold value, send the second non-enabling signal to the control signal generation enabling unit, and update the cumulative number of times that the difference is greater than the signal value comparison threshold; the control signal generation enabling unit is connected with the signal threshold control unit, and uses After receiving the second disabling signal of the signal threshold control unit, send a "control disabling" signal to the control signal generating unit; the control signal generating unit communicates with the radio frequency module, the control value storage unit and the control signal generating The enabling unit is connected to the control signal generation enabling unit, and is used to generate an update signal to the control value storage unit without generating a radio frequency control signal to the communication radio frequency module after receiving the "control disabling" signal from the control signal generation enabling unit.

According to another aspect of the present invention, a radio frequency control method is also provided, the method includes: Step A, the current signal value obtained by the signal receiving unit from the communication baseband module; Step B, when the current signal value is valid, the signal receiving situation The feedback unit sends the current signal value to the signal threshold control unit; step C, the signal threshold control unit calculates the difference between the current signal value and the last filtering result in its first buffer, if the difference is greater than the signal value comparison threshold and the difference When the cumulative number of times greater than the signal value comparison threshold is less than the signal error count threshold, send a second disabling signal to the control signal generation enabling unit to update the cumulative number of times the difference is greater than the signal value comparison threshold; step F, when receiving After the second disabling signal of the signal threshold control unit, the control signal generation enabling unit sends a "control disabling" signal to the control signal generating unit; Step G, the control signal generating unit receives the "control signal generating enabling unit" After the "control disable" signal, no radio frequency control signal is generated to the communication radio frequency module, and an update signal is generated to the control value storage unit.

Description of drawings

FIG. 1 is a schematic diagram of the position of a radio frequency control device in the prior art in a wireless communication system;

Fig. 2 is the timing diagram of standard SPI signal and wrong SPI signal in the prior art;

3 is a schematic structural diagram of a radio frequency control device according to an embodiment of the present invention;

4 is a flowchart of a radio frequency control method according to an embodiment of the present invention;

5 is a schematic diagram of the state of each unit in the first processing flow of the communication radio frequency module according to the embodiment of the present invention;

Fig. 6 is a schematic diagram of the state of each unit in the second processing flow of the communication radio frequency module according to the embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

In the specific implementation described below, it is assumed that the format of the baseband control signal is an SPI standard signal, and the control signal required by the communication radio frequency module that the circuit of the present invention needs to control is also an SPI standard signal. Those skilled in the art should understand that the present invention is also applicable to signals of other formats.

In an exemplary embodiment of the present invention, a radio frequency control device is provided. FIG. 3 is a schematic structural diagram of a radio frequency control device according to an embodiment of the present invention. As shown in Figure 3, the radio frequency control device includes: a signal receiving unit 101, a signal receiving situation feedback unit 102, a signal threshold control unit 103, a signal value filtering unit 104, a control value storage unit 105, a control signal generation enabling unit 106 and Control signal generation unit 107 . It should be noted that the white arrow indicates the transmission path of the signal value, and the black arrow indicates the transmission path of the enable signal without the value signal (such as the "control enable" signal/"control disable" signal and the second enable signal/second disable signal). Each constituent unit will be described in detail below.

The signal receiving unit 101 internally includes a decoding circuit corresponding to the waveform of the baseband control signal, such as an SPI decoding circuit, for receiving and decoding the baseband control signal input from the communication baseband module 200 to obtain the current signal value.

The signal receiving status feedback unit 102 is connected to the signal receiving unit 101 and is used for monitoring the receiving status of the signal receiving unit and feeding back the monitoring status to the communication baseband module 200 . When the information is normally received, the 'received normal' signal is fed back, and the current signal value is sent to the signal threshold control unit 103 . If no valid SPI information is received within a certain period of time, an alarm signal of 'abnormal reception' is sent to the communication baseband module 200 . At the same time, the signal receiving and feedback unit 102 is also used to receive information from the signal threshold control unit 103 (value exceeding the threshold information) and feed it back to the communication baseband module.

The signal threshold control unit 103 is connected with the signal reception status feedback unit 102 and includes: a threshold information register, a signal error count register, a value buffer register and a comparison subunit. Among them: the threshold information register is used to store the initialized signal value comparison threshold and the signal error count threshold; the signal error count register is used to store the cumulative value of the number of error reports. The value buffer register is used to store the last filtering result compared with the current value. The comparison subunit is connected with the above-mentioned threshold information register, signal error counting register, and value buffer register, and is used to compare the data in the value buffer register after receiving the current signal value from the signal receiving situation feedback unit 102, Judging whether the difference between the two is greater than the signal value comparison threshold in the threshold information register, according to the result of the judgment, there are the following two situations:

Case 1: If the difference between the current value and the data in the value buffer register is less than or equal to the set signal value comparison threshold, then notify the control signal generation enabling unit 106 that the current signal is enabled, and transmit the current value to the signal value filtering unit 104 (see processing flow A below);

Case 2: If the difference between the current value and the data in the value buffer register is greater than the set signal value comparison threshold, then judge whether the value in the signal error count register is greater than the signal error count threshold: (1) if the value in the signal error count register If the value is less than or equal to the signal error counting threshold (referring to the following processing flow B), then an error signal exceeding the threshold is sent to the signal reception feedback unit 102, and the control signal generation enabling unit 106 is notified that the current signal is not enabled, and the value in the signal error counting register is Numerical value plus 1; (2) if the numerical value in the signal error counting register is greater than the signal error counting threshold, then notify the control signal generation enabling unit 106 to enable the current signal, and transmit the data to the signal numerical value filtering unit 104 (referring to the following processing flow D ). In the last part of this article, the processing flow A, processing flow B, processing flow C and processing flow D will be described in detail.

In addition, the signal threshold control unit 103 also receives the filtered result fed back from the signal value filtering unit 104 and stores it in a value buffer register for comparison with it when receiving a valid signal next time.

The numerical signal filtering unit 104 is connected with the signal threshold control unit, and is used to receive the current signal value transmitted by the signal threshold control unit 103, and read at least two historical filtering data in the control value storage unit 105; the current signal value and At least two historical filtering data are respectively multiplied by corresponding coefficients, and a current filtering result is calculated. Then store the current filtering result in the control value storage unit 105 .

The control value storage unit 105 is a memory module provided with two read-write ports, which can be used for writing and reading data by the signal value filtering unit 104 and for reading data by the control signal generating unit 107 . The value storage unit is controlled to update the storage of the value according to the indication of the signal receiving condition feedback unit 102 (details will be described below in conjunction with various conditions).

The control signal generation enabling unit 106 receives the notification signal from the signal threshold control unit 103 . If the signal threshold control unit 103 notifies that the current signal is enabled, then the control signal generation enabling unit 106 generates an enabling signal, that is, its state is updated as "enabling" state; otherwise, the enabling signal is not generated, that is, its state is updated as "" Disabled" state.

The control signal generation unit 107 includes a control signal generation circuit required by the corresponding communication radio frequency module. The control signal generation unit 107 generates a radio frequency module control signal according to the control value storage unit 105 and the control signal generation enabling unit 106 in each cycle. If the control signal generates Enabling unit 106 gives 'enabling' signal (corresponding 'Y' among Fig. 5/Fig. 6), then control signal generation unit 107 reads the corresponding data in the control value storage unit 105 and generates corresponding control signal; , if the control signal generation enabling unit 106 gives a 'disable' signal (like 'N' in FIG. 5/6), the control signal generating unit 107 is idle in the current processing cycle and does not generate any control signal.

Fig. 4 is a flowchart of a radio frequency control method according to an embodiment of the present invention. As shown in Figure 4, the radio frequency control method of this embodiment includes:

Step S402, receiving the baseband control signal, the signal receiving unit (101) decodes the waveform, obtains the current value, and transmits the value to the signal reception status feedback unit (102).

Step S404, the signal receiving feedback unit 102 judges whether it is a valid signal? If yes, execute step S406, otherwise, execute step S408;

Step S406, the processing flow of the invalid signal value (processing flow C), the flow ends;

In step S408, the signal threshold control unit 103 judges whether the difference between the current signal value and the buffered value is greater than the threshold, if yes, execute step S412, otherwise, execute step S410.

Step S410, the processing flow of the normal signal value (processing flow A), the flow ends;

Step S412, the signal threshold control unit 103 judges whether the value of the signal threshold error register is greater than the signal error technical threshold, if yes, execute step S416; otherwise, execute step S414;

Step S414, the signal value jump processing flow (processing flow D), the flow ends;

Step S416, the processing flow of the value of the error signal (processing flow B), and the flow ends.

Fig. 5 is a schematic diagram of the states of each unit of the communication radio frequency module in the first processing flow according to the embodiment of the present invention. Fig. 6 is a schematic diagram of the state of each unit in the second processing flow of the communication radio frequency module according to the embodiment of the present invention. In FIG. 5 and FIG. 6 , the left side is the name of the corresponding register or the processing result, and the right side is the specific value of the corresponding register or the processing result. Specifically, for Figures 5 and 6:

Line 1 is: the numerical signal received by the signal receiving unit;

The second line is: the feedback signal of the signal reception feedback unit;

The third line is: the value registered in the value buffer register (signal threshold control unit);

The 4th line is: when the signal value comparison threshold=32, the result of the signal threshold control unit;

The 5th row is: when signal error count threshold=2, the count value of signal threshold error count register (signal threshold control unit);

Line 6 is: the state of the control signal generation enabling unit;

The 7th line is: control the value stored in the value storage unit (buff1 and buff2);

Line 8 is: the current value and calculation result of the signal value filtering unit;

Line 9 is: control the value stored in the value storage unit;

Line 10 is: the state of the control signal generation enabling unit;

Line 11 is: the output signal of the control signal generating unit.

The processing flow of the communication radio frequency module according to the embodiment of the present invention will be described below with reference to FIG. 5 and FIG. 6 .

Processing flow of normal signal value (processing flow A):

In the following, a normal signal value will be taken as an example to explain the processing flow of the circuit according to the invention to a normal signal, as shown in the signal processing cycle marked 'A' in FIG. 5 . This process includes:

Step A1, the signal receiving unit 101 first decodes the waveform, and decodes the received data as 44, and transmits the data to the signal receiving status feedback unit 102;

Step A2, the signal reception status feedback unit 102 confirms the data reception status and sends confirmation information to the communication baseband module ('Y' as shown in the figure);

Step A3, the numerical value in the signal threshold control unit 103 cache at the current moment is 41, the numerical difference between the two is 3 (44-41=3), and the initialization signal numerical comparison threshold in the numerical threshold control unit 103 is 32, the numerical value Difference 3 is less than the threshold value, (simultaneously the current signal error counting register value is 0, when the value difference is less than the signal value comparison threshold value, no matter whether the value in the signal threshold value error counting register is greater than the signal error technical threshold value, the signal threshold value control unit 103 will Mark current signal numerical value (enable) unit threshold value control unit mark this data enable) (display ' PASS' among Fig. 5), and notify control signal to generate and enable unit (106) current signal numerical value enable (control among Fig. 5 'Y' for signal generation enable unit);

Step A4, at the same time, the value threshold control unit 102 also transmits the current data to the signal value filtering unit 103 as the current value (hereinafter Cu_value) for filtering operation.

The calculation formula of the signal value filter unit 103 circuit as an example is:

F_result＝Cu_value×0.5+buff1×0.25+buff2×0.25

Wherein F_result is the calculation result (Filter Result), Cu_value is the current value (CurrentValue), buff1 and buff2 are the signal value filtering unit 103 read from the control value storage unit 104 (the control value storage unit includes buff2, buff1 and OUT3 data registers) .

As shown in FIG. 5 , in the current state, the value stored in buff1 in the value storage unit is 42, the value stored in buff2 is 41, and the current value (Cu_value) received from the value threshold control unit 102 is 44. The calculated F_result is 42.75 (44×0.5+42×0.25+41×0.25), because the control word of the radio frequency part in the current example can only be an integer, so the result will be rounded to 43 and stored in the OUT value register of the control value storage unit 104 (As shown in FIG. 5 ), the signal value filtering unit 103 stores the result 43 in the buffer of the signal threshold control unit 102 for comparison when the next valid data arrives.

Step A5, after the signal value filtering unit 104 completes the data storage operation to the control value storage unit 105 (OUT value register), the control signal generation unit 107 will generate the state of the enabling unit 106 according to the control value storage unit 105 and the control signal Determines whether to generate RF control signals. In the current state, the control signal generation enabling unit 106 state is 'Y' (enabling), and the OUT value register value of the control value storage unit is 43, and the control signal generation unit (107) will generate the control signal by the value 43.

Step A6, after the current processing cycle ends, the control value storage unit 105 will organize its own data (because the signal reception status feedback unit 102 is marked as 'Y', so the following correction operation is performed), write the data in buff1 into buff2, and use OUT The value is written into buff1 (see the processing cycle marked as 'A' in Figure 5 and the subsequent processing cycle to control the value change in the value storage unit (buff1/buff2)).

Processing flow B (processing flow of error signal value):

In the following, an error waveform will be taken as an example to explain the processing flow of the circuit according to the invention to an error signal, as shown in the signal processing cycle marked 'B' in FIG. 5 . This process includes:

Step B1, the signal receiving unit 101 first decodes the waveform, and decodes that the received value is 87 (due to the similar error shown in FIG. 1 ), and transmits the data to the signal receiving situation feedback unit 102;

Step B2, the signal reception status feedback unit 102 confirms the data reception status and sends confirmation information to the communication baseband module (as shown in the figure 'Y'). The value in the buffer of the signal threshold control unit 103 at the current moment is 43, the numerical difference between the two is 43 (87-44=43), and the initialization threshold of 103 in the numerical threshold control unit is 32, and the numerical difference 43 is greater than the threshold. When the value difference is greater than the threshold, the value of the signal threshold error count register is increased by 1. In the current example, the value of the signal threshold error register is corrected from 0 to 1, and the value of 1 is smaller than the signal error count threshold (the initial value of the signal error count threshold in the current example It is 2. If the difference between the current value and the data in the value buffer register is greater than the set signal value comparison threshold and the value in the signal error count register is less than the signal error count threshold, then the data is marked as disabled);

Step B3, the value threshold control unit 103 identifies that this data is not enabled (as shown in Figure 5 'ERROR'), and notifies the control signal generation enabling unit 106 that the current signal value is not enabled (as shown in Figure 5, the control signal generation is enabled unit'N'). Since the current signal value has been marked as disabled, the current value is not stored as Cu_value, and Cu_value remains unchanged. Since buff1 and buff2 have been corrected by the control value storage unit 105 after the previous processing cycle, the current buff2, buff1, and Cu_value 43, 43, 43 respectively;

Step B4, substituting the signal value filter unit 103 circuit calculation formula (F_result=Cu_value×0.5+buff1×0.25+buff2×0.25) of the example into the calculation result is 43;

Step B5, since the control signal generation enabling unit 106 indicates that the current signal value is not enabled, the control signal generation unit 107 will not generate a control signal after the end of the current processing cycle (such as the 'idle' of the control signal generation unit 107 marked in Figure 5). 'state). The above numerical calculation result is still stored in the OUT register of the control numerical storage unit 105 and the numerical buffer register of the signal threshold control unit 103;

Step B6, since the signal reception status feedback unit 102 is marked as 'Y', the control value storage unit 105 performs the following correction operations: write buff2 with the data in buff1, and write buff1 with the OUT value (see Figure 5 marked as ' The processing cycle of B' and the subsequent processing cycle control the value change in the value storage unit (buff1/buff2).

Processing flow C (processing flow of invalid signal value):

Below will firstly take an invalid signal waveform as an example to explain the processing flow of the circuit described in the invention to the invalid signal, as shown in the signal processing cycle marked 'C' in Figure 5, the processing flow includes:

Step C1, the signal receiving unit 101 does not receive a valid signal waveform in the current cycle, and notifies the signal receiving status feedback unit;

Step C2, the signal reception status feedback unit 102 confirms the data reception status (in the current example, it is an invalid signal) and sends confirmation information to the baseband ('N' as shown in the figure);

Step C3, in this case, the signal threshold control unit 103 receives an invalid signal identifier from the value reception feedback unit 102, directly identifies that the current value signal is not enabled, (as in 'ERROR' in Figure 5), and notifies the control signal The current signal value of the generation enabling unit 106 is not enabled (such as the 'N' of the control signal generation enabling unit in Figure 5);

Step C4, the signal threshold filtering unit 104 still performs numerical calculation, but because the signal reception status feedback unit 102 indicates that the current signal is 'N', the control numerical storage unit 105 does not modify the OUT register, and does not modify the buff1 and buff2 registers after the data processing cycle. no corrections are made;

Step C5, because the control signal generation enabling unit 106 indicates that the current signal value is not enabled, the control signal generation unit 107 will not generate a control signal after the end of the current processing cycle (such as the 'idle' of the control signal generation unit 107 marked in Figure 5). 'state).

Processing flow D (processing flow of signal value jump):

In the above-mentioned processing flow B, we have given the processing flow for error jumps and processing when error waveforms occur. In the practical application of mobile communication, especially high-speed applications (such as car phones, high-speed mobile phone applications, etc.), due to the frequent changes in the distance and noise conditions between the terminal and the baseband, especially in the woods, inside cement houses and viaducts Inferior areas will require frequent changes in communication power. In this case, the control signal of the radio frequency module is required to change quickly with the change of the baseband signal. The present invention introduces a signal error counting threshold to distinguish normal baseband power jump requirements from erroneous signal waveforms. Processing flow D illustrates the flow of the present invention to identify and process normal baseband power jump requirements and error signal waveforms.

The following will take a normal power large-scale jump waveform as an example to explain the processing flow of the circuit according to the invention to the power large-scale jump signal. As shown in D1 to D7 marked in Figure 6, due to the requirements of the mobile communication environment, the communication baseband system requires a large jump in power (the situation given in this example is that the baseband requirement is greatly increased, and the baseband requirement is greatly reduced. similar to this example).

Period D1, as shown in the signal processing period marked D1 in FIG. 6 , the signal receiving unit 101 first decodes the waveform, and decodes the received data as 87, and transmits the data to the signal reception status feedback unit 102, The signal reception status feedback unit 102 confirms the data reception status and sends confirmation information to the communication baseband module (shown as 'Y' in the figure). At present, the numerical value in the signal threshold control unit 103 cache is 43, the numerical difference between the two is 44 (87-43=44), and the initialization signal numerical comparison threshold of 103 in the numerical threshold control unit is 32, and the numerical difference 44 is greater than threshold, and the value in the signal threshold error counting register in the signal threshold control unit 102 is corrected from 0 to 1, because the value in the register is less than the signal error counting threshold, the unit threshold control unit 103 identifies that this data does not enable (as shown in the figure 6 shows 'ERROR'), and informs the control signal generation enabling unit 106 that the current signal value is not enabled. For other processing flows, refer to the preceding processing flow B. After the current processing cycle ends, no control signal is generated, and the value buffer register in the signal threshold control unit 103 is not updated.

Cycle D2, as shown in the signal processing cycle marked D2 in Figure 6, its processing flow is similar to the D1 cycle, the signal receiving unit 101 first decodes the waveform, and decodes the received data as 89, and transmits the data To the signal reception status feedback unit 102, the signal reception status feedback unit 102 confirms the data reception status and sends confirmation information to the baseband (as shown in the figure 'Y'). At present, the numerical value in the signal threshold control unit 103 cache is 43, the numerical difference between the two is 46 (89-43=46), and the initialization signal numerical comparison threshold of 103 in the numerical threshold control unit is 32, and the numerical difference 46 is greater than threshold, and the numerical value in the signal threshold error counting register in the signal threshold value control unit 102 is revised from 1 to 2, because the numerical value in the register is less than the signal error counting threshold value, unit threshold value control unit 103 marks this data and can not enable (as shown in the figure 6 shows 'ERROR'), and informs the control signal generation enabling unit 106 that the current signal value is not enabled. For other processing flows, refer to the preceding processing flow B. After the current processing cycle ends, no control signal is generated, and the value buffer register in the signal threshold control unit 103 is not updated.

Cycle D3, marked as 'D3' processing cycle in Figure 6, the signal receiving unit 101 first decodes the waveform, and decodes the received data to be 90, and transmits the data to the signal receiving situation feedback unit 102, the signal receiving The situation feedback unit 102 confirms the data reception situation and sends confirmation information to the baseband (shown as 'Y' in the figure). At present, the numerical value in the signal threshold control unit 103 cache is 43, the numerical difference between the two is 47 (90-43=47), and the initialization signal numerical comparison threshold of 103 in the numerical threshold control unit is 32, and the numerical difference 47 is greater than threshold, and the value in the signal threshold error count register in the signal threshold control unit 102 is corrected from 2 to 3, because the difference between the current data and the value buffer register value in the signal threshold control unit 103 is greater than the signal value comparison threshold and in the register value is greater than the signal error count threshold, the unit threshold control unit 103 identifies the data enable (shown as 'PASS' in FIG. 6 ), and then the flow is processed according to the value enable flow (see processing flow A).

The D4, D5, D6, D7 processing cycles after the D3 processing cycle are similar to the processing cycle (referring to processing flow A) of general data, as can be seen from Fig. 6, when the baseband control signal jumps indeed, the present invention The above circuit can quickly track the control signal, and the control signal generation unit 107 can output a signal value very similar to the signal amplitude required by the baseband within about 7 processing cycles.

In summary, the circuit of the present invention can not only better deal with signal value decoding errors caused by baseband signal transmission errors, but also quickly track signal value changes when the baseband signal jumps, which can effectively A control signal of the radio frequency module with an appropriate value is generated to effectively control the communication radio frequency module.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (15)

1. A radio frequency control device, characterized in that its front end is connected with the communication baseband module, and its rear end is connected with the communication radio frequency module, comprising: The signal receiving unit is connected with the communication baseband module, and is used to obtain the current signal value from the communication baseband module; A signal reception status feedback unit, configured to send the current signal value to the signal threshold control unit when the current signal value is valid; A signal threshold control unit, configured to calculate the difference between the current signal value and the last filtering result in the first buffer, if the difference is greater than the signal value comparison threshold and the difference is greater than the cumulative times of the signal value comparison threshold When it is less than the signal error counting threshold, send a second disabling signal to the control signal generation enabling unit, and update the cumulative number of times the difference is greater than the signal value comparison threshold; The control signal generation enabling unit is connected to the signal threshold control unit, and is used to send “control not enable” to the control signal generation unit after receiving the second disabling signal from the signal threshold control unit. "Signal; The control signal generation unit is connected with the communication radio frequency module, the control value storage unit and the control signal generation enabling unit, and is used for not generating The radio frequency control signal is sent to the communication radio frequency module, and an update signal is generated to the control value storage unit. 2. The radio frequency control device according to claim 1, further comprising: a signal value filtering unit connected to the signal threshold control unit; and The control value storage unit is connected with the signal value filter unit and the control signal generation unit; Wherein, the signal reception status feedback unit is further configured to send a first enable signal to the control value storage unit when the current signal is valid; The signal threshold control unit is further configured to not set the value of the second buffer in the signal value filtering unit if the difference is greater than the signal value comparison threshold and the cumulative number of times the difference is greater than the signal value comparison threshold is less than the signal error count threshold. value is updated; The signal value filtering unit is configured to filter the value in the second buffer combined with at least one historical filtering result, generate a current filtering result, and send the current filtering result to the first buffer and the signal threshold control unit. Control numerical storage unit; The control numerical storage unit is used to provide the historical filtering result to the signal numerical filtering unit; after receiving the first enabling signal, the current filtering result will be acquired from the signal numerical filtering module and Registering, after receiving the update signal from the control signal generating unit, using the current filtering result to update the historical filtering result. 3. The radio frequency control device according to claim 2, wherein the signal threshold control unit comprises: The first buffer is used to cache the last filtering result obtained from the filtering sub-unit in the signal value filtering unit; A signal error counting and registering subunit, configured to count the number of times the difference is greater than the preset signal value comparison threshold; The difference calculation subunit is connected to the signal reception status feedback unit and the first buffer, and is used to calculate the difference between the current signal information and the last filtering result in the first buffer; The comparison subunit is connected with the difference calculation subunit and the signal error count register, and is used for if the difference value is greater than a preset signal value comparison threshold and the value of the signal error count register is less than a preset When the signal error counting threshold is reached, the signal error counting register is notified to be updated, a second disable signal is sent to the control signal generation enabling unit, and the value of the second register in the signal value filtering unit is not updated. 4. The radio frequency control device according to claim 3, characterized in that, The comparison subunit is further configured to notify the signal error count register to reset if the difference is greater than the signal value comparison threshold and the value of the signal error count register is greater than or equal to the signal error count threshold. Zero, sending the second enable signal to the control signal generation enable unit, using the current signal value to update the value of the second register in the signal value filtering unit; The control signal generation enabling unit is further configured to send a “control enable” signal to the control signal generating unit after receiving the second enabling signal from the signal threshold control unit; The control signal generation unit is also connected to the communication radio frequency module, and is used to extract the current filtering result from the control value storage unit to generate a radio frequency after receiving the "control enable" signal of the control signal generation enabling unit. control signal, and send the radio frequency control signal to the communication radio frequency module to generate an update signal to the control value storage unit. 5. The radio frequency control device according to claim 4, wherein the comparison subunit is further configured to send a second enable signal to the control signal if the difference is smaller than a preset signal value comparison threshold The generation enabling unit updates the value of the second register in the signal value filtering unit by using the current signal value. 6. The radio frequency control device according to claim 2, characterized in that, The signal reception status feedback unit is also used to send an invalid signal identifier to the signal threshold control unit and send a first disabling signal to the control value storage unit when the current signal value is invalid; The signal threshold control unit is also configured not to update the value of the first buffer after receiving an invalid signal identifier, not to update the cumulative number of times the difference is greater than the signal value comparison threshold, and not to update the value of the signal value filtering unit Update the value of the second buffer in the middle, and send the second disabling signal to the control signal generation enabling unit; The signal value filtering unit filters the value in the second buffer by combining at least one historical filtering result to generate a current filtering result, and sends the current filtering result to the first buffer and the control value of the signal threshold control unit storage unit; The control value storage unit is further configured not to register the current filtering result after receiving the first disable signal; not to update the history after receiving the non-update signal from the control signal generation unit filtering result; The control signal generating enabling unit is further configured to send a “control not enabling” signal to the control signal generating unit after receiving the second disabling signal from the signal threshold control unit; The control signal generation unit is also used to maintain the status quo after receiving the "control disabling" signal from the control signal generation enabling unit, not to generate a radio frequency control signal to the communication radio frequency module, and to generate a non-update signal to the control value storage unit. 7. The radio frequency control device according to claim 6, wherein the signal reception status feedback unit is also used for: When the current signal value is valid, feedback to the communication baseband module to receive a normal signal; When the value of the current signal is invalid, a signal of abnormal reception is fed back to the communication baseband module. 8. The radio frequency control device according to claim 2, wherein the control value storage unit comprises: A historical filtering result registering subunit, configured to register the at least one historical filtering result; The current filtering result registering subunit is configured to register the current filtering result after receiving the first enabling signal; The updating subunit is configured to use the current filtering result to update the historical filtering result after receiving the updating signal from the control signal generating unit. 9. The radio frequency control device according to claim 2, wherein the signal value filtering unit comprises: second buffer; a coefficient registering subunit, configured to register the buffer value in the second register and the filter coefficient of at least one historical filter result; A filtering subunit, configured to multiply the cached value in the second buffer and at least one historical filtering result by its corresponding filtering coefficient and then sum them to generate a current filtering result; The sending subunit is configured to send the current filtering result to the first buffer and the control value storage unit of the signal threshold control unit respectively. 10. The radio frequency control device according to claim 9, wherein the number of historical filtering results in the coefficient register subunit is 2, and the filtering subunit is used to obtain the current filtering result according to the following formula: F_result=Cu_value×a1+buff1×a2+buff2×a3, Among them, F_result is the current filtering result, Cu_value is the current signal value, buffer1 and buffer2 are two historical filtering results in the historical filtering result storage subunit, and a1, a2 and a3 are the filtering coefficients of Cu_value, buffer1 and buffer2 respectively. 11. The radio frequency control device according to any one of claims 1 to 10, characterized in that the radio frequency control device is set separately or placed in the communication radio frequency module. 12. A radio frequency control method, characterized in that, comprising: Step A, the current signal value obtained by the signal receiving unit from the communication baseband module; Step B, when the current signal value is valid, the signal reception status feedback unit sends the current signal value to the signal threshold control unit; Step C, the signal threshold control unit calculates the difference between the current signal value and the last filter result in the first buffer, if the difference is greater than the signal value comparison threshold and the difference is greater than the cumulative number of signal value comparison thresholds When it is less than the signal error counting threshold, send a second disabling signal to the control signal generation enabling unit, and update the cumulative number of times the difference is greater than the signal value comparison threshold; Step F, after receiving the second disabling signal from the signal threshold control unit, the control signal generation enabling unit sends a “control disabling” signal to the control signal generating unit; Step G, the control signal generation unit does not generate a radio frequency control signal to the communication radio frequency module after receiving the "control disable" signal from the control signal generation enabling unit, and generates an update signal to the control value storage unit. 13. The radio frequency control method according to claim 12, characterized in that, The step B further includes: when the current signal value is valid, the signal reception status feedback unit sends a first enabling signal to the control value storage unit; The step C further includes: if the difference is greater than the signal value comparison threshold and the cumulative number of times the difference is greater than the signal value comparison threshold is less than the signal error count threshold, the signal threshold control unit does not set the second buffer in the signal value filtering unit The value of the device is updated; After the step C, it also includes: step D, the signal value filtering unit combines at least one historical filtering result to filter the value in the second buffer, generates a current filtering result, and sends the current filtering result to the signal threshold control unit The first register and the control value storage unit; After the step D, it also includes: step E, controlling the value storage unit to provide the historical filtering result to the signal value filtering unit; after receiving the first enabling signal, the signal value filtering module will obtain the The current filtering result is stored and stored, and the historical filtering result is updated by using the current filtering result after receiving an update signal from the control signal generating unit. 14. The radio frequency control method according to claim 13, wherein the step C comprises: Step C1, the first buffer caches the last filtering result obtained from the filtering sub-unit in the signal value filtering unit; Step C2, the signal error counting and registering subunit counts the number of times the difference is greater than the preset signal value comparison threshold; Step C3, the difference calculation subunit calculates the difference between the current signal information and the last filtering result in the first buffer; Step C4, if the difference is greater than the preset signal value comparison threshold and the value of the signal error count register is smaller than the preset signal error count threshold, the comparison subunit notifies the signal error count register to update, and sends the first 2. No enable signal is sent to the control signal generating enable unit, and the value of the second register in the signal value filtering unit is not updated. 15. The radio frequency control method according to claim 14, characterized in that, after step C3, further comprising: Step C4', if the difference is greater than the signal value comparison threshold and the value of the signal error count register is greater than or equal to the signal error count threshold, the comparison subunit of the signal threshold control unit notifies the The signal error counting register is reset to zero, and the second enable signal is sent to the control signal generation enable unit, and the value of the second register in the signal value filtering unit is updated by using the current signal value; Step F', after receiving the second enabling signal from the signal threshold control unit, the control signal generation enabling unit sends a "control enabling" signal to the control signal generating unit; Step G', the control signal generation unit is also connected to the communication radio frequency module, and is used to extract the current filtering result from the control value storage unit to generate a radio frequency after receiving the "control enable" signal from the control signal generation unit. control signal, and send the radio frequency control signal to the communication radio frequency module to generate an update signal to the control value storage unit.

Images