A processing system and method for radio frequency signals

Abstract

The application relates to the technical field of radio frequency signal processing, in particular to a processing system and method for radio frequency signals, and a processing system for radio frequency signals, which comprises a signal receiving module, a signal processing module, a switch processing module and a signal output module, the signal receiving module is used for receiving radio frequency signals; the signal processing module is used for performing segmented filtering processing on the radio frequency signals to obtain corresponding filtered signals; the switch processing module is used for comparing the radio frequency signals with a preset radio frequency, if the radio frequency signals are greater than the preset radio frequency, a first control signal is generated and sent out; if the radio frequency signals are smaller than the preset radio frequency, a second control signal is generated and sent out; and the intermediate frequency signal output module is used for receiving intermediate frequency signals. The application has the advantages that the frequency of the received radio frequency signals can be compared with the preset radio frequency through the switch processing module, and the effects of different channel switches can be controlled.

Description

Technical Field

[0001] This application relates to the field of radio frequency signal processing, and in particular to a system and method for processing radio frequency signals. Background Technology

[0002] Radio frequency (RF) signals are modulated radio waves with a certain transmission frequency. However, the frequency of chips used for baseband processing is not high enough. Therefore, the high-frequency RF signals used for transmission are downgraded to intermediate frequency (IF) signals, and then the corresponding IF signals are processed to obtain the required spectral components.

[0003] The relevant technologies mainly involve using an antenna to input microwave signals of 10G~15G, which are then processed by a radio frequency signal processing module to obtain output signals of 1G~6GHz.

[0004] However, in related technologies, the frequency range of received microwave signals is relatively small, and some ultra-wideband radio frequency signals cannot be received, thus missing the processing of ultra-wideband radio frequency signals and missing some information. Summary of the Invention

[0005] In order to acquire longer frequency radio frequency signals, this application provides a radio frequency signal processing system and method.

[0006] In a first aspect, this application provides a processing system for radio frequency signals, employing the following technical solution:

[0007] A radio frequency signal processing system includes a channel module and a local oscillator module networked with the channel module. The channel module includes a signal receiving module, a switch processing module networked with the signal receiving module, a signal processing module networked with the switch processing module, and a signal output module.

[0008] The signal receiving module is used to receive radio frequency signals and transmit the received radio frequency signals to the switch processing module;

[0009] The switch processing module is used to receive the radio frequency signal and compare the radio frequency signal with a preset radio frequency. If the radio frequency signal is greater than the preset radio frequency, a first control signal is generated and sent to control the closing of the first switch to output a high-frequency radio frequency signal. If the radio frequency signal is less than the preset radio frequency, a second control signal is generated and sent to control the closing of the second switch to output a low-frequency radio frequency signal.

[0010] The signal processing module is used to receive the corresponding high-frequency radio frequency signal or low-frequency radio frequency signal, and then perform segmented filtering processing on it to obtain the corresponding filtered signal, and process the filtered signal to obtain the corresponding intermediate frequency signal, and send the intermediate frequency signal to the intermediate frequency signal output module.

[0011] The intermediate frequency signal output module is used to receive the intermediate frequency signal and output the intermediate frequency signal.

[0012] In some embodiments, the signal processing module includes a signal acquisition unit, a mode selection unit, and a mixing control unit. The signal acquisition unit is connected to the switch processing module to receive radio frequency signals of different bandwidths and transmits the radio frequency signals to the mode selection unit. The mode selection unit is used to perform segmented filtering processing on the radio frequency signals to obtain corresponding filtered signals and transmits the filtered signals to the mixing control unit. The mixing control unit is used to receive the filtered signals and perform frequency down-conversion processing on the filtered signals to output an intermediate frequency signal.

[0013] In some embodiments, the mode selection unit includes a selection control subunit and a gain control subunit. The selection control subunit is used to receive the radio frequency signal and process the radio frequency signal in different modes to output the filtered signal. The different modes include a low noise mode, a normal mode, and a low distortion mode. The gain control subunit is used to receive the mode selected by the selection control subunit and then select the corresponding gain value.

[0014] In some embodiments, the local oscillator module includes a local oscillator control unit, which is used to input a local oscillator signal to the mixing control unit. The mixing control unit is also used to receive the local oscillator signal and the filtered signal, and to down-frequency process the local oscillator signal and the filtered signal to output the intermediate frequency signal.

[0015] In some embodiments, the local oscillator control unit includes a processing subunit and an output subunit. The processing subunit is used to receive a preset signal and synthesize the preset signal to output a corresponding processed signal. The output subunit is used to receive the processed signal and process the processed signal based on a power divider to output a local oscillator signal.

[0016] In some embodiments, the switch processing module includes a data processing unit and a switch control unit. The data processing unit receives the radio frequency signal, compares the radio frequency signal with a preset radio frequency frequency, and outputs a corresponding control signal to the switch control unit. The control signal includes a first control signal and a second control signal.

[0017] Specifically, when the data processing unit outputs a first control signal, the switch control unit controls the closing of the first switch; when the data processing unit outputs a second control signal, the switch control unit controls the closing of the second switch.

[0018] In some embodiments, the switch control unit includes a first switch subunit and a second switch subunit. The first switch subunit is used to control the signal processing module to receive radio frequency signals of different bandwidths, and the second switch subunit is used to control the mode selection unit to process the received filtered signals in different modes.

[0019] Secondly, this application provides a method for processing radio frequency signals, employing the following technical solution:

[0020] A method for processing radio frequency signals, implemented based on the aforementioned system for processing radio frequency signals, includes the following steps:

[0021] The signal receiving module receives radio frequency signals and transmits the received radio frequency signals to the signal processing module;

[0022] The switch processing module receives the radio frequency signal and compares the radio frequency signal with a preset radio frequency. If the radio frequency signal is greater than the preset radio frequency, a first control signal is generated and sent to control the closing of the first switch to output a high-frequency radio frequency signal. If the radio frequency signal is less than the preset radio frequency, a second control signal is generated and sent to control the closing of the second switch to output a low-frequency radio frequency signal.

[0023] The signal processing module receives the corresponding high-frequency radio frequency signal or low-frequency radio frequency signal, performs segmented filtering on it to obtain the corresponding filtered signal, processes the filtered signal to obtain the corresponding intermediate frequency signal, and sends the intermediate frequency signal to the intermediate frequency signal output module.

[0024] The intermediate frequency signal output module receives the intermediate frequency signal and outputs the intermediate frequency signal.

[0025] In some embodiments, the signal receiving module receives radio frequency signals, including the following steps:

[0026] The raw radio frequency signal is acquired based on the antenna;

[0027] The corresponding processing signal is obtained based on the original radio frequency signal;

[0028] The corresponding radio frequency signal is obtained based on the processed signal.

[0029] In some embodiments, the radio frequency signal data further includes a radio frequency mode, and after generating and issuing a first control signal for controlling the closing of the first switch, the following steps are included:

[0030] The corresponding radio frequency mode is obtained based on the radio frequency.

[0031] Based on the radio frequency mode, the corresponding processing mode is selected from the preset modes, which include low noise mode, low distortion mode and normal mode;

[0032] If the corresponding processing mode of the radio frequency mode is a low noise mode, then a first mode signal is generated and emitted.

[0033] If the corresponding processing mode of the radio frequency mode is a low distortion mode, then a second mode signal is generated and emitted.

[0034] If the corresponding processing mode of the radio frequency mode is the normal mode, then a third mode signal is generated and emitted.

[0035] The radio frequency (RF) signal processing system and method provided in this application can compare the frequency of the received RF signal with a preset RF frequency through a switch processing module, thereby controlling the switching of different channels. If the RF signal data is greater than the preset RF frequency, a first control signal is generated and issued to control the closing of a first switch to output a high-frequency RF signal; if the RF signal data is less than the preset RF frequency, a second control signal is generated and issued to control the closing of a second switch to output a low-frequency RF signal. This allows for rapid activation of the corresponding switch, thereby increasing the rate at which the RF signal is downgraded to an intermediate frequency (IF) signal. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0037] Figure 2 This is a schematic diagram of the power supply structure of the signal processing module;

[0038] Figure 3 This is a schematic diagram of the channel module structure;

[0039] Figure 4 This is a schematic diagram of the switch processing module;

[0040] Figure 5 This is a schematic diagram of the structure of the first switch subunit;

[0041] Figure 6 A schematic diagram of the structure for acquiring the local oscillator signal;

[0042] Figure 7 This is a flowchart of the method steps in an embodiment of this application.

[0043] Explanation of reference numerals in the attached figures: 10, Signal receiving module; 20, Switch processing module; 21, Data processing unit; 22, Switch control unit; 221, First switch subunit; 222, Second switch subunit; 30, Signal processing module; 31, Signal acquisition unit; 32, Mode selection unit; 321, Selection control subunit; 322, Gain control subunit; 33, Mixer control unit; 40, Signal output module; 50, Local oscillator control unit; 51, Processing subunit; 52, Output subunit. Detailed Implementation

[0044] For software implementations, the techniques described herein can be implemented using modules that perform the functions described herein, such as programs, functions, etc. Software code can be stored in memory units and executed by a processor. The memory units can be implemented within or outside the processor; in the latter case, the memory units can be communicatively coupled to the processor via various methods known in this art. The invention will be further described in detail below with reference to the accompanying drawings.

[0045] Radio frequency (RF) signals are primarily modulated radio waves with a specific transmission frequency. RF signals are high-frequency signals capable of being transmitted into space. The carrier of RF signals is the antenna, which transmits or receives RF signals. However, during transmission, because RF signals have such a high frequency that filters cannot directly process them, they need to be first converted to intermediate frequency (IF) signals, and then upsampled to a higher frequency RF signal before further transmission.

[0046] This application discloses a processing system for radio frequency signals, mainly for down-converting radio frequency signals. The processing system is mainly implemented based on a down-converter module. In this embodiment, the down-converter module mainly includes a down-converter with a bandwidth of 8GHz-40GHz and a down-converter with a bandwidth of 20MHz-8GHz. The down-converter monitors and receives ultra-wideband radio frequency signals of 8GHz-40GHz. In order to enable the received radio frequency signals to output stable intermediate frequency signals, the components, connectors and cables used are all domestically produced, which can be supplied for a long time and are stable and reliable.

[0047] Reference Figure 1The downconverter module includes a channel module, a local oscillator module, and a control module. The radio frequency signal is input to the channel module, and the local oscillator module inputs its local oscillator signal to the channel module. The local oscillator module and the control module interact with each other, and then the control module inputs a control signal to the channel module. The channel module filters and mixes the received radio frequency signal, local oscillator signal, and control signal to reduce the frequency of the radio frequency signal and output an intermediate frequency signal.

[0048] To ensure optimal operation of the downconverter module, a power supply module is also included. This module primarily provides power to the various modules within the downconverter module. The power supply module receives a 12V external power input, which is then converted to 5.3V or 3.3V by its internal DC-DC module. These 5.3V or 3.3V voltages are then supplied to the channel module, local oscillator module, and control module. It's important to note that the DC-DC module is a conventional switching power supply capable of both boost and buck converters.

[0049] It should be noted that the quality of the power supply not only determines the power consumption of the product, but also the amount of parasitic parameters it introduces to the receiving RF circuit. In order to increase the power isolation of each stage of amplifiers and internal sub-modules, and to improve the stability of each device during operation, key components are powered by separate electronic modules.

[0050] Reference Figure 2 The channel module primarily performs frequency down-conversion on the radio frequency (RF) signal. It mainly includes components such as RF amplifiers, RF switches, mixers, and digitally controlled attenuators. The power supply module provides power to each of these components using a separate power supply module. Therefore, 5.3V or 3.3V voltages are input to power supply modules 1, 2, 3, and 4, respectively, and then these power supply modules supply power to the RF amplifier, RF switch, mixer, and digitally controlled attenuator, respectively. Similarly, the power supply module also powers the local oscillator module, with each individual component of the local oscillator module using a separate power supply module. This will not be described in detail here.

[0051] Reference Figure 3The channel module includes a signal receiving module 10, a switch processing module 20 connected to the signal receiving module 10, a signal processing module 30 network-connected to the switch processing module 20, and a signal output module 40. The signal receiving module 10 receives radio frequency (RF) signals and transmits the received RF signals to the switch processing module 20. The switch processing module 20 receives the RF signals and compares them with a preset RF frequency. If the RF signal is greater than the preset RF frequency, it generates and sends a first control signal to control the closing of a first switch to output a high-frequency RF signal. If the RF signal is less than the preset RF frequency, it generates and sends a second control signal to control the closing of a second switch to output a low-frequency RF signal. The signal processing module 30 receives the corresponding high-frequency or low-frequency RF signal, performs segmented filtering to obtain the corresponding filtered signal, processes the filtered signal to obtain the corresponding intermediate frequency (IF) signal, and transmits the IF signal to the IF signal output module 40. The IF signal output module 40 receives the IF signal and outputs the IF signal.

[0052] The preset radio frequency (RF) frequency represents the lowest frequency that distinguishes whether an RF signal is high-frequency or low-frequency. In this embodiment, the preset RF frequency is set to an RF signal with a bandwidth of 18 GHz. When the frequency bandwidth of the RF signal is between 8 GHz and 18 GHz, the RF signal is characterized as a low-frequency RF signal. When the frequency bandwidth of the RF signal is between 18 GHz and 40 GHz, the RF signal is characterized as a high-frequency RF signal. The signal processing module 30 mainly includes processing low-frequency and high-frequency RF signals separately. The switching processing module 20 specifically divides the RF signal processing into two channels: the first channel mainly corresponds to RF signals with frequencies between 8 GHz and 18 GHz, and the second channel mainly corresponds to RF signals with frequencies between 18 GHz and 40 GHz.

[0053] The first switch represents the switch in the signal processing module 30 that controls the first channel, while the second switch represents the switch in the signal processing module 30 that controls the second channel.

[0054] The first control signal represents the signal sent by the switch processing module 20 to the signal processing module 30. This first control signal is used to control the signal processing module 30 to turn on the first switch, thereby allowing the high-frequency radio frequency signal to pass through the first channel. The second control signal represents the signal sent by the switch processing module 20 to the signal processing module 30. This second control signal is used to control the signal processing module 30 to turn on the second switch, thereby allowing the low-frequency radio frequency signal to pass through the second channel.

[0055] Specifically, the signal receiving module 10 mainly receives or transmits radio frequency signals through an antenna, and also transmits the received radio frequency signals to the switch processing module 20. In this embodiment, a 3GHz~8GHz monitoring antenna is used. This antenna is a biconical non-frequency-varying ultra-wideband antenna, which can monitor a wide frequency range of 3GHz~8GHz and has good omnidirectionality and medium gain.

[0056] The signal processing module 30 includes a signal acquisition unit 31, a mode selection unit 32, and a mixing control unit 33. The signal acquisition unit 31 is connected to the switch processing module 20 to receive radio frequency signals of different bandwidths and transmits the radio frequency signals to the mode selection unit 32. The mode selection unit 32 is used to perform segmented filtering processing on the radio frequency signals to obtain the corresponding filtered signals and transmits the filtered signals to the mixing control unit 33. The mixing control unit 33 is used to receive the filtered signals and perform frequency down-conversion processing on the filtered signals to output intermediate frequency signals.

[0057] The filtering signal is mainly the signal remaining after the radio frequency signal has been filtered out of redundant signals in the bandpass filter. The redundant signals mainly refer to unwanted signals, such as image frequency signals. Since the mixer has a limited frequency bandwidth, while the downconverter has a very wide bandwidth, when the radio frequency signal is input to the signal processing module 30, it will be processed by segmented mixing. After one frequency conversion, the required intermediate frequency signal is obtained. Finally, the signal is filtered by switching to achieve the frequency conversion reception function of the broadband signal.

[0058] It should be noted that the signal processing module 30 has two symmetrical sets, which are used to receive radio frequency signals of different frequencies.

[0059] The mode selection unit 32 includes a selection control subunit 321 and a gain control subunit 322. The selection control subunit 321 is used to receive radio frequency signals and process the radio frequency signals in different modes to output filtered signals. The different modes include low noise mode, normal mode and low distortion mode. The gain control subunit 322 is used to receive the mode selected by the selection control subunit 321 and then select the corresponding gain value.

[0060] It should be noted that after the RF input enters the channel module, the mode is selected first. There are three modes: low noise, low distortion, and normal. Here we use a set of single-pole double-throw switches. Normal and low distortion modes take the direct path, while low noise mode takes the amplification path. In low distortion mode, the RF attenuator attenuates by 10dB, while in normal and low noise modes there is no attenuation. This achieves gain control in different modes.

[0061] Reference Figure 4The switch processing module 20 includes a data processing unit 21 and a switch control unit 22. The data processing unit 21 is used to receive radio frequency signals, compare the radio frequency signals with a preset radio frequency frequency, and output corresponding control signals to the switch control unit 22. The control signals include a first control signal and a second control signal.

[0062] Specifically, when the data processing unit 21 outputs the first control signal, the switch control unit 22 controls the closing of the first switch; when the data processing unit 21 outputs the second control signal, the switch control unit 22 controls the closing of the second switch.

[0063] Reference Figure 5 The switch control unit 22 includes a first switch subunit 221 and a second switch subunit 222. The first switch subunit 221 is used to control the signal processing module 30 to receive radio frequency signals of different bandwidths, and the second switch subunit 222 is used to control the mode selection unit 32 to process the received filtered signals in different modes.

[0064] It should be noted that the first switch subunit 221 has two symmetrical sets. When the first set is turned off, the second set is simultaneously turned on, improving the processing efficiency of the radio frequency signal. The second switch subunits 222 are also located in two symmetrical sets, thus filtering the two sets of radio frequency signals at different frequencies. Each set of second switch subunits 222 has three groups, corresponding to the three modes selected by the selection control subunit 321: low noise, low distortion, and normal. Therefore, when the selection control subunit 321 selects a different mode, the second switch subunit 222 turns on the corresponding switch, thereby controlling the radio frequency signal to operate in different modes. The second switch subunit 222 uses a single-pole triple-throw switch.

[0065] In the diagram, a represents the low-distortion mode, with an attenuator N1 connected in series. b represents the normal mode, and c represents the low-noise mode, with an amplifier N2 connected in series.

[0066] Reference Figure 1 and Figure 6 The local oscillator module includes a local oscillator control unit 50, which is used to input the local oscillator signal to the mixing control unit 33. The mixing control unit 33 is also used to receive the local oscillator signal and the filtered signal, and to perform frequency down-conversion processing on the local oscillator signal and the filtered signal to output the intermediate frequency signal.

[0067] The local oscillator control unit 50 includes a processing subunit 51 and an output subunit 52. The processing subunit 51 is used to receive a preset signal and synthesize the preset signal to output a corresponding processed signal. The output subunit 52 is used to receive the processed signal and process the processed signal based on the power divider to output the local oscillator signal.

[0068] The preset signal is a reference clock signal, which is mainly generated by a temperature-controlled crystal oscillator. It mainly uses a 5V power supply input and outputs a frequency of 120MHz through the temperature-controlled crystal oscillator. The temperature-controlled crystal oscillator has high frequency stability, which makes both the local oscillator and the AD sampling clock output very stable.

[0069] The mixer control unit is mainly used to receive filtered signals and perform segmented filtering on the input RF signal. It filters out intermediate frequency (IF) and image frequency signals through bandpass filters at each frequency segment. Combined with the local oscillator signal, the signals are mixed at the mixer to obtain a 5.8 GHz IF output signal. The output terminal has a digitally controlled attenuator with a minimum attenuation step of 0.5 dB, which can be used to automatically correct the output signal power.

[0070] It should be noted that the signal processing module 30 mainly performs two mixing operations. The specific steps of the first mixing are as follows: the local oscillator generates a 9.16GHz point frequency signal through the phase-locked loop chip, which is then directly mixed with the 840MHz comb spectrum signal after passing through an amplifier and filter to obtain a 10GHz signal. The 19.16GHz point frequency signal is then mixed with the 840MHz comb spectrum signal to obtain a 20GHz signal. After filtering by the cavity filter, a high-frequency comb spectrum point frequency signal with good spurious and harmonic suppression is obtained.

[0071] The above process completes one mixing operation, ultimately yielding two comb spectrum spot frequency signals at 10 GHz and 20 GHz. These spot frequency signals are then mixed a second time with the secondary local oscillator. After one frequency conversion, the comb spectrum produces a higher-frequency comb spectrum signal. The secondary local oscillator's 28 GHz~45.8 GHz and 10 GHz frequencies are mixed to output 18 GHz~26.5 GHz, while the 8 GHz~18 GHz frequencies are obtained by mixing the secondary local oscillator's 28 GHz~38 GHz frequencies with the 20 GHz frequency.

[0072] It should be noted that the mixing control unit 33 includes a single-oscillator phase-locked loop circuit and a dual-oscillator phase-locked loop circuit. The mixing control unit 33 uses a phase-locked loop composed of a frequency synthesizer (VCO) and a frequency divider to output the required high-frequency signal.

[0073] For example, the frequencies of the input radio frequency (RF) signal and the corresponding local oscillator (LO) signal are in one-to-one correspondence. In order to obtain the intermediate frequency (IF) signal of the corresponding frequency, when the RF signal frequency is 8GHz~12GHz, the corresponding LO signal is 13.8GHz~17.8GHz; when the RF signal frequency is 12GHz~18GHz, the corresponding LO signal is 17.8GHz~23.8GHz; when the RF signal frequency is 18GHz~40GHz, the corresponding LO signal is 23.8GHz~45.8GHz. The final output IF signal is 5.8GHz.

[0074] It should be noted that the local oscillator control unit 50 includes a frequency synthesizer, a power divider, and an integrator output. The specific operation steps are as follows: First, a 120MHz point frequency is provided by the crystal oscillator module. The frequency synthesizer outputs the frequency via SPI control, then the frequency is filtered by an active loop to the VCO. The VCO outputs the required frequency, which is then amplified and divided by the power divider, returning to the frequency synthesizer for phase detection. The synthesizer's output frequency is adjusted, ultimately locking the local oscillator signal at the required frequency from the VCO output, and then sent to the mixing control unit 33 of each channel module. It should be noted that the conventional processing methods for local oscillator signal input and output are not described in detail in this application.

[0075] The implementation principle is as follows: First, the signal receiving module 10 transmits the received radio frequency (RF) signal to the data processing unit 21. The data processing unit 21 compares the RF signal with a preset RF frequency and then selects appropriate channels for frequency down-conversion processing. If the RF signal is greater than the preset RF frequency, the switch control unit 22 generates and sends a first control signal to control the closing of the first switch on the first channel to output a high-frequency RF signal. If the RF signal is less than the preset RF frequency, the switch control unit 22 generates and sends a second control signal to control the closing of the second switch on the second channel to output a low-frequency RF signal. Then, the switch control unit 22 transmits the output filtered signal to the signal acquisition unit 31, which then transmits the filtered signal to the selection control subunit 321. The selection control subunit 321 and the gain control subunit 322 select the appropriate processing mode and corresponding gain value for the filtered signal. Finally, the mixing control unit 33 performs two mixing operations on the received local oscillator signal and the processed filtered signal to output an intermediate frequency (IF) signal.

[0076] This application also discloses a method for processing radio frequency signals.

[0077] A method for processing radio frequency signals, implemented based on a system for processing radio frequency signals, with reference to... Figure 7 This includes the following steps:

[0078] S100, the signal receiving module receives radio frequency signals and transmits the received radio frequency signals to the signal processing module.

[0079] S200, the switch processing module receives the radio frequency signal and compares the radio frequency signal with the preset radio frequency.

[0080] S300: If the radio frequency signal is greater than the preset radio frequency, a first control signal is generated and sent to control the closing of the first switch to output a high-frequency radio frequency signal.

[0081] S400: If the radio frequency signal is less than the preset radio frequency, a second control signal is generated and sent to control the closing of the second switch to output a low-frequency radio frequency signal.

[0082] S500: The signal processing module receives the corresponding high-frequency or low-frequency radio frequency signal, performs segmented filtering on it to obtain the corresponding filtered signal, processes the filtered signal to obtain the corresponding intermediate frequency signal, and sends the intermediate frequency signal to the intermediate frequency signal output module.

[0083] The S600 intermediate frequency signal output module receives and outputs intermediate frequency signals.

[0084] The signal receiving module receives radio frequency signals, including the following steps:

[0085] S110 acquires raw radio frequency signals based on the antenna.

[0086] S120 obtains the corresponding processing signal based on the original radio frequency signal.

[0087] S130 obtains the corresponding radio frequency signal based on the processed signal.

[0088] The processed signal refers to the signal received by the signal receiving module after performing a switching filter on the original radio frequency signal. This switching filter on the original radio frequency signal can suppress electromagnetic noise and reduce the product's interference voltage emission to the power grid.

[0089] The radio frequency signal data also includes the radio frequency mode, and after generating and issuing a first control signal for controlling the closing of the first switch, it further includes the following steps:

[0090] The S500 obtains the corresponding radio frequency mode based on the radio frequency.

[0091] The S510 selects the corresponding processing mode from the preset modes based on the RF mode. The preset modes include low noise mode, low distortion mode and normal mode.

[0092] S520, if the corresponding processing mode of the radio frequency mode is low noise mode, then generate and send the first mode signal.

[0093] S530, if the corresponding processing mode of the radio frequency mode is low distortion mode, then generate and send the second mode signal.

[0094] S540, if the corresponding processing mode of the radio frequency mode is the normal mode, then generate and send the third mode signal.

[0095] The first mode signal represents the signal sent by the second switch subunit 222 to the selection control subunit 321 and the gain control subunit 322, which is used to control the selection control subunit 321 to select the low noise mode, and at the same time control the gain value of the gain control subunit 322 to be 0.

[0096] The second mode signal represents the signal sent by the second switch subunit 222 to the selection control subunit 321 and the gain control subunit 322, which is used to control the selection control subunit 321 to select the normal mode, and at the same time control the gain value of the gain control subunit 322 to be 0.

[0097] The third mode signal represents the signal sent by the second switch subunit 222 to the selection control subunit 321 and the gain control subunit 322, which is used to control the selection control subunit 321 to select the low distortion mode, while the gain value of the gain control subunit 322 is 10dB.

[0098] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A processing system for radio frequency signals, comprising a channel module and a local oscillator module network-connected to the channel module, characterized in that, The channel module includes a signal receiving module (10), a switch processing module (20) connected to the signal receiving module (10), a signal processing module (30) network-connected to the switch processing module (20), and a signal output module (40). The signal receiving module (10) is used to receive radio frequency signals and transmit the received radio frequency signals to the switch processing module (20). The switch processing module (20) is used to receive the radio frequency signal and compare the radio frequency signal with a preset radio frequency. If the radio frequency signal is greater than the preset radio frequency, a first control signal is generated and sent to control the closing of the first switch to output a high-frequency radio frequency signal. If the radio frequency signal is less than the preset radio frequency, a second control signal is generated and sent to control the closing of the second switch to output a low-frequency radio frequency signal. The signal processing module (30) is used to receive the corresponding high-frequency radio frequency signal or low-frequency radio frequency signal, and then perform segmented filtering processing on it to obtain the corresponding filtered signal, and process the filtered signal to obtain the corresponding intermediate frequency signal, and send the intermediate frequency signal to the intermediate frequency signal output module (40). The intermediate frequency signal output module (40) is used to receive the intermediate frequency signal and output the intermediate frequency signal.

2. The radio frequency signal processing system according to claim 1, characterized in that: The signal processing module (30) includes a signal acquisition unit (31), a mode selection unit (32), and a mixing control unit (33). The signal acquisition unit (31) is connected to the switch processing module (20) to receive the radio frequency signals of different bandwidths and transmit the radio frequency signals to the mode selection unit (32). The mode selection unit (32) is used to perform segmented filtering processing on the radio frequency signals to obtain corresponding filtered signals and transmit the filtered signals to the mixing control unit (33). The mixing control unit (33) is used to receive the filtered signals and perform frequency down-conversion processing on the filtered signals to output intermediate frequency signals.

3. The radio frequency signal processing system according to claim 2, characterized in that: The mode selection unit (32) includes a selection control subunit (321) and a gain control subunit (322). The selection control subunit (321) is used to receive the radio frequency signal and process the radio frequency signal in different modes to output the filtered signal. The different modes include low noise mode, normal mode and low distortion mode. The gain control subunit (322) is used to receive the mode selected by the selection control subunit (321) and then select the corresponding gain value.

4. The radio frequency signal processing system according to claim 2, characterized in that: The local oscillator module includes a local oscillator control unit (50), which is used to input a local oscillator signal to the mixing control unit (33). The mixing control unit (33) is also used to receive the local oscillator signal and the filtered signal, and to perform frequency reduction processing on the local oscillator signal and the filtered signal to output the intermediate frequency signal.

5. A radio frequency signal processing system according to claim 4, characterized in that: The local oscillator control unit (50) includes a processing subunit (51) and an output subunit (52). The processing subunit (51) is used to receive a preset signal and synthesize the preset signal to output a corresponding processing signal. The output subunit (52) is used to receive the processing signal and process the processing signal based on the power divider to output a local oscillator signal.

6. A radio frequency signal processing system according to claim 2, characterized in that: The switch processing module (20) includes a data processing unit (21) and a switch control unit (22). The data processing unit (21) receives the radio frequency signal, compares the radio frequency signal with a preset radio frequency frequency, and outputs a corresponding control signal to the switch control unit (22). The control signal includes a first control signal and a second control signal. When the data processing unit (21) outputs a first control signal, the switch control unit (22) controls the closing of the first switch; when the data processing unit (21) outputs a second control signal, the switch control unit (22) controls the closing of the second switch.

7. A radio frequency signal processing system according to claim 6, characterized in that: The switch control unit (22) includes a first switch subunit (221) and a second switch subunit (222). The first switch subunit (221) is used to control the signal processing module (30) to receive radio frequency signals of different bandwidths, and the second switch subunit (222) is used to control the mode selection unit (32) to process the received filtered signals in different modes.

8. A method for processing radio frequency signals, characterized in that: An implementation of a radio frequency signal processing system according to any one of claims 1-7 includes the following steps: The signal receiving module (10) receives radio frequency signals and transmits the received radio frequency signals to the signal processing module (30). The switch processing module (20) receives the radio frequency signal and compares the radio frequency signal with a preset radio frequency. If the radio frequency signal is greater than the preset radio frequency, a first control signal is generated and sent to control the closing of the first switch to output a high-frequency radio frequency signal. If the radio frequency signal is less than the preset radio frequency, a second control signal is generated and sent to control the closing of the second switch to output a low-frequency radio frequency signal. The signal processing module (30) receives the corresponding high-frequency radio frequency signal or low-frequency radio frequency signal, performs segmented filtering on it to obtain the corresponding filtered signal, processes the filtered signal to obtain the corresponding intermediate frequency signal, and sends the intermediate frequency signal to the intermediate frequency signal output module (40). The intermediate frequency signal output module (40) receives the intermediate frequency signal and outputs the intermediate frequency signal.

9. A method for processing radio frequency signals according to claim 8, characterized in that: The signal receiving module (10) receives radio frequency signals, including the following steps: The raw radio frequency signal is acquired based on the antenna; The corresponding processing signal is obtained based on the original radio frequency signal; The corresponding radio frequency signal is obtained based on the processed signal.

10. A method for processing radio frequency signals according to claim 8, characterized in that: The radio frequency signal data also includes a radio frequency mode, and after generating and issuing a first control signal for controlling the closing of the first switch, the following steps are included: The corresponding radio frequency mode is obtained based on the radio frequency. Based on the radio frequency mode, the corresponding processing mode is selected from the preset modes, which include low noise mode, low distortion mode and normal mode; If the corresponding processing mode of the radio frequency mode is a low noise mode, then a first mode signal is generated and emitted. If the corresponding processing mode of the radio frequency mode is a low distortion mode, then a second mode signal is generated and emitted. If the corresponding processing mode of the radio frequency mode is the normal mode, then a third mode signal is generated and emitted.

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