Combining device radio frequency processing method and system

Abstract

The application relates to the technical field of wireless communication, and particularly relates to a combiner-based radio frequency processing method and system, which comprises a radio frequency interface, a preprocessing circuit, a power divider circuit, a mixing circuit, a filtering circuit, an amplifier circuit, a phase shifter circuit, a combiner circuit, an analog-to-digital conversion circuit, a baseband processing circuit and a parameter adjustment circuit. The application can retain the prior art which only needs one radio frequency receiving port and one AD conversion circuit to realize the purpose of quadrature mixing of a radio frequency signal. In addition, the parameter adjustment circuit of the application can improve the signal processing quality in the process from radio frequency signal receiving to baseband transmission and improve the signal noise ratio.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and specifically to a method and system for radio frequency processing based on a combiner. Background Technology

[0002] There are relatively few existing RF processing technologies based on combiners. However, some research has been conducted to address specific technical problems, such as the limited number of receiving ports in quadrature mixing. For example, patent document CN114844558A discloses an RF processing technology based on combiners. This technology requires only one RF receiving port and one AD conversion circuit, thus solving the problem of limited receiving ports in quadrature mixing. This is because the technology essentially splits the received signal, performs separate mixing on each signal, and then combines it to obtain a single signal for AD conversion. Therefore, this technology can indeed transmit the RF signal to the baseband via a single analog-to-digital converter for processing. However, this technology requires multiple amplifications and filters, as well as separate mixing, leading to severe signal distortion due to multiple signal conversions. Furthermore, at least one signal requires phase shifting, resulting in a generally low signal-to-noise ratio (SNR) of the final signal obtained by the combiner. Summary of the Invention

[0003] The purpose of this invention is to provide a combiner-based radio frequency processing method and system to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] The RF processing system based on a combiner includes an RF interface, a preprocessing circuit, a power divider circuit, a mixer circuit, a filter circuit, an amplifier circuit, a phase shifter circuit, a combiner circuit, an analog-to-digital converter circuit, a baseband processing circuit, and a parameter adjustment circuit. The mixer circuit includes a first mixer circuit and a second mixer circuit. The filter circuit includes a first filter circuit and a second filter circuit. The parameter adjustment circuit includes a first mixer parameter adjustment circuit, a second mixer parameter adjustment circuit, a first filter parameter adjustment circuit, and a second filter parameter adjustment circuit.

[0006] The aforementioned mixing circuit is used to mix the signal and transmit it to the filtering circuit;

[0007] The filtering circuit is used to filter the mixed signal and transmit it to the amplifier circuit.

[0008] The combiner circuit is used to combine at least two signals and transmit them to the analog-to-digital converter circuit.

[0009] The analog-to-digital converter circuit is used to convert the signal from analog to digital and transmit it to the baseband processing circuit.

[0010] The baseband processing circuit is used to demodulate, descramble, despread, and decode the signal and send a feedback signal to the parameter adjustment circuit.

[0011] The parameter adjustment circuit is used to adjust the mixing and filtering parameters according to the feedback signal.

[0012] Furthermore, the signal mixing process includes a first mixer circuit mixing the signal and a second mixer circuit mixing the signal.

[0013] Furthermore, the signal filtering includes a first filter circuit for signal filtering and a second filter circuit for signal filtering.

[0014] Furthermore, sending feedback signals to the parameter adjustment circuit includes sending feedback signals to the first mixing parameter adjustment circuit, sending feedback signals to the second mixing parameter adjustment circuit, sending feedback signals to the first filter parameter adjustment circuit, and sending feedback signals to the second filter parameter adjustment circuit.

[0015] Furthermore, the adjustment of mixing and filtering parameters based on the feedback signal includes the adjustment of mixing parameters by a first mixing parameter adjustment circuit, the adjustment of mixing parameters by a second mixing parameter adjustment circuit, the adjustment of filtering parameters by a first filtering parameter adjustment circuit, and the adjustment of filtering parameters by a second filtering parameter adjustment circuit.

[0016] Furthermore, the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit all include a microcontroller control system and a digital potentiometer electrically connected to each other. The microcontroller control system controls the digital potentiometer according to the feedback signal, and the digital potentiometer is used to adjust the mixing circuit or the filtering circuit.

[0017] Furthermore, the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit all include digital potentiometers. The first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit share a single microcontroller control system. The single microcontroller control system is electrically connected to each digital potentiometer. The single microcontroller control system controls the digital potentiometers according to feedback signals. The digital potentiometers are used to adjust the mixing circuit or the filtering circuit.

[0018] Furthermore, the microcontroller control system is also used to input test signals to the first mixer circuit and the second mixer circuit, and is also used to separate the test signals from the feedback signals of the baseband processing circuit and determine the mixing quality of the first mixer circuit and the second mixer circuit. Then, based on the mixing quality, the system controls the digital potentiometer to adjust the mixing circuit.

[0019] On the other hand, the RF processing method based on combiners includes the following steps:

[0020] The radio frequency interface receives radio frequency signals and transmits them to the preprocessing circuit.

[0021] The preprocessing circuit receives radio frequency signals and performs preprocessing, which includes initial filtering and amplification.

[0022] The power divider circuit splits the preprocessed signal into two signals and transmits them to the mixer circuit.

[0023] The mixing circuit described above mixes the signal and transmits it to the filtering circuit.

[0024] The filtering circuit filters the mixed signal and transmits it to the amplifier circuit.

[0025] The amplifier circuit amplifies the mixed and filtered signal again and transmits it to the phase shifter or combiner.

[0026] The phase shifter circuit described above will perform phase shifting on at least one signal and transmit it to the combiner;

[0027] The combiner circuit combines at least two signals and transmits them to the analog-to-digital converter circuit.

[0028] The analog-to-digital converter circuit converts the signal from analog to digital and transmits it to the baseband processing circuit.

[0029] The baseband processing circuit demodulates, descrambles, despreads, and decodes the signal, and sends a feedback signal to the parameter adjustment circuit.

[0030] The parameter adjustment circuit adjusts the mixing and filtering parameters based on the feedback signal.

[0031] Furthermore, the parameter adjustment circuit adjusts the mixing and filtering parameters according to the feedback signal. The microcontroller control system, including the parameter adjustment circuit, also inputs test signals to the first mixer circuit and the second mixer circuit, and separates the test signals from the feedback signals of the baseband processing circuit to determine the mixing quality of the first mixer circuit and the second mixer circuit. Then, based on the mixing quality, it controls the digital potentiometer to adjust the mixing circuit.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] This application retains the functionality of existing technologies that require only one RF receiver port and one AD conversion circuit to achieve quadrature mixing of RF signals. Furthermore, the parameter adjustment circuit of this application adjusts the mixing and filtering parameters according to the feedback signal, which can improve the signal processing quality from RF signal reception to transmission to baseband and increase the signal-to-noise ratio. Attached Figure Description

[0034] Figure 1 This is a circuit diagram of the radio frequency processing system based on a combiner according to the present invention. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figure 1 As shown, the RF processing system based on a combiner of the present invention includes an RF interface, a preprocessing circuit, a power divider circuit, a mixer circuit, a filter circuit, an amplifier circuit, a phase shifter circuit, a combiner circuit, an analog-to-digital converter circuit, a baseband processing circuit, and a parameter adjustment circuit. The mixer circuit includes a first mixer circuit and a second mixer circuit. The filter circuit includes a first filter circuit and a second filter circuit. The parameter adjustment circuit includes a first mixer parameter adjustment circuit, a second mixer parameter adjustment circuit, a first filter parameter adjustment circuit, and a second filter parameter adjustment circuit.

[0037] The aforementioned mixing circuit is used to mix the signal and transmit it to the filtering circuit;

[0038] The filtering circuit is used to filter the mixed signal and transmit it to the amplifier circuit.

[0039] The combiner circuit is used to combine at least two signals and transmit them to the analog-to-digital converter circuit.

[0040] The analog-to-digital converter circuit is used to convert the signal from analog to digital and transmit it to the baseband processing circuit.

[0041] The baseband processing circuit is used to demodulate, descramble, despread, and decode the signal and send a feedback signal to the parameter adjustment circuit.

[0042] The parameter adjustment circuit is used to adjust the mixing and filtering parameters according to the feedback signal;

[0043] In implementation, the combiner circuit combines at least two signals and transmits them to the analog-to-digital converter circuit; the analog-to-digital converter circuit converts the signals from analog to digital and transmits them to the baseband processing circuit; the baseband processing circuit demodulates, descrambles, despreads, and decodes the signals and sends feedback signals to the parameter adjustment circuit; the parameter adjustment circuit adjusts the mixing and filtering parameters according to the feedback signals. This application retains the requirement of only one RF receiving port and one AD conversion circuit to achieve quadrature mixing of RF signals, as in the prior art. In addition, the parameter adjustment circuit of this application can improve the signal processing quality from RF signal reception to transmission to the baseband, thereby improving the signal-to-noise ratio.

[0044] Optionally, such as Figure 1 As shown, the RF processing system based on a combiner of the present invention includes an RF interface, a preprocessing circuit, a power divider circuit, a mixer circuit, a filter circuit, an amplifier circuit, a phase shifter circuit, a combiner circuit, an analog-to-digital converter circuit, a baseband processing circuit, and a parameter adjustment circuit. The mixer circuit includes a first mixer circuit and a second mixer circuit. The filter circuit includes a first filter circuit and a second filter circuit. The parameter adjustment circuit includes a first mixer parameter adjustment circuit, a second mixer parameter adjustment circuit, a first filter parameter adjustment circuit, and a second filter parameter adjustment circuit. The mixer circuit is used to mix and process the signal and transmit it to the filter circuit.

[0045] The filtering circuit is used to filter the mixed signal and transmit it to the amplifier circuit.

[0046] The combiner circuit is used to combine at least two signals and transmit them to the analog-to-digital converter circuit.

[0047] The analog-to-digital converter circuit is used to convert the signal from analog to digital and transmit it to the baseband processing circuit.

[0048] The baseband processing circuit is used to demodulate, descramble, despread, and decode the signal and send a feedback signal to the parameter adjustment circuit.

[0049] The parameter adjustment circuit is used to adjust the mixing and filtering parameters according to the feedback signal; the signal mixing process includes a first mixer circuit and a second mixer circuit. The signal filtering process includes a first filter circuit and a second filter circuit.

[0050] In implementation, the combiner circuit combines at least two signals and transmits them to the analog-to-digital converter circuit; the analog-to-digital converter circuit converts the signals from analog to digital and transmits them to the baseband processing circuit; the baseband processing circuit demodulates, descrambles, despreads, and decodes the signals and sends feedback signals to the parameter adjustment circuit; the parameter adjustment circuit adjusts the mixing and filtering parameters according to the feedback signals. This application retains the requirement of only one RF receiving port and one AD conversion circuit to achieve quadrature mixing of RF signals, as in the prior art. In addition, the parameter adjustment circuit of this application can improve the signal processing quality from RF signal reception to transmission to the baseband, thereby improving the signal-to-noise ratio.

[0051] Optionally, such as Figure 1 As shown, the RF processing system based on a combiner of the present invention includes an RF interface, a preprocessing circuit, a power divider circuit, a mixer circuit, a filter circuit, an amplifier circuit, a phase shifter circuit, a combiner circuit, an analog-to-digital converter circuit, a baseband processing circuit, and a parameter adjustment circuit. The mixer circuit includes a first mixer circuit and a second mixer circuit. The filter circuit includes a first filter circuit and a second filter circuit. The parameter adjustment circuit includes a first mixer parameter adjustment circuit, a second mixer parameter adjustment circuit, a first filter parameter adjustment circuit, and a second filter parameter adjustment circuit. The mixer circuit is used to mix and process the signal and transmit it to the filter circuit.

[0052] The filtering circuit is used to filter the mixed signal and transmit it to the amplifier circuit.

[0053] The combiner circuit is used to combine at least two signals and transmit them to the analog-to-digital converter circuit.

[0054] The analog-to-digital converter circuit is used to convert the signal from analog to digital and transmit it to the baseband processing circuit.

[0055] The baseband processing circuit is used to demodulate, descramble, despread, and decode the signal and send a feedback signal to the parameter adjustment circuit.

[0056] The parameter adjustment circuit is used to adjust the mixing and filtering parameters according to the feedback signal; the signal mixing process includes a first mixer circuit and a second mixer circuit. The signal filtering process includes a first filter circuit and a second filter circuit.

[0057] Sending feedback signals to the parameter adjustment circuits includes sending feedback signals to the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit; adjusting the mixing and filtering parameters according to the feedback signals includes adjusting the mixing parameters by the first mixing parameter adjustment circuit, adjusting the mixing parameters by the second mixing parameter adjustment circuit, adjusting the filtering parameters by the first filtering parameter adjustment circuit, and adjusting the filtering parameters by the second filtering parameter adjustment circuit.

[0058] Optionally, such as Figure 1 As shown, the RF processing system based on a combiner of the present invention includes an RF interface, a preprocessing circuit, a power divider circuit, a mixer circuit, a filter circuit, an amplifier circuit, a phase shifter circuit, a combiner circuit, an analog-to-digital converter circuit, a baseband processing circuit, and a parameter adjustment circuit. The mixer circuit includes a first mixer circuit and a second mixer circuit. The filter circuit includes a first filter circuit and a second filter circuit. The parameter adjustment circuit includes a first mixer parameter adjustment circuit, a second mixer parameter adjustment circuit, a first filter parameter adjustment circuit, and a second filter parameter adjustment circuit. The mixer circuit is used to mix and process the signal and transmit it to the filter circuit.

[0059] The filtering circuit is used to filter the mixed signal and transmit it to the amplifier circuit.

[0060] The combiner circuit is used to combine at least two signals and transmit them to the analog-to-digital converter circuit.

[0061] The analog-to-digital converter circuit is used to convert the signal from analog to digital and transmit it to the baseband processing circuit.

[0062] The baseband processing circuit is used to demodulate, descramble, despread, and decode the signal and send a feedback signal to the parameter adjustment circuit.

[0063] The parameter adjustment circuit is used to adjust the mixing and filtering parameters according to the feedback signal; the signal mixing process includes a first mixer circuit and a second mixer circuit. The signal filtering process includes a first filter circuit and a second filter circuit.

[0064] Sending feedback signals to the parameter adjustment circuits includes sending feedback signals to the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit. Adjusting the mixing and filtering parameters based on the feedback signals includes adjusting the mixing parameters using the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit. Each of the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit includes a microcontroller control system electrically connected to a digital potentiometer. The microcontroller control system controls the digital potentiometer based on the feedback signals, and the digital potentiometer is used to adjust the mixing circuit or the filtering circuit. In implementation, the combiner circuit combines at least two signals and transmits them to the analog-to-digital converter circuit; the analog-to-digital converter circuit converts the signals from analog to digital and transmits them to the baseband processing circuit; the baseband processing circuit demodulates, descrambles, despreads, and decodes the signals and sends feedback signals to the parameter adjustment circuit; the parameter adjustment circuit adjusts the mixing and filtering parameters according to the feedback signals. This application retains the requirement of only one RF receiving port and one AD conversion circuit to achieve quadrature mixing of RF signals, as in the prior art. In addition, the parameter adjustment circuit of this application adjusts the mixing and filtering parameters according to the feedback signals (the microcontroller control system controls the digital potentiometer according to the feedback signals, and the digital potentiometer is used to adjust the mixing circuit or the filtering circuit), which can also improve the signal processing quality from RF signal reception to baseband transmission and improve the signal-to-noise ratio.

[0065] Optionally, such as Figure 1 As shown, the RF processing system based on a combiner of the present invention includes an RF interface, a preprocessing circuit, a power divider circuit, a mixer circuit, a filter circuit, an amplifier circuit, a phase shifter circuit, a combiner circuit, an analog-to-digital converter circuit, a baseband processing circuit, and a parameter adjustment circuit. The mixer circuit includes a first mixer circuit and a second mixer circuit. The filter circuit includes a first filter circuit and a second filter circuit. The parameter adjustment circuit includes a first mixer parameter adjustment circuit, a second mixer parameter adjustment circuit, a first filter parameter adjustment circuit, and a second filter parameter adjustment circuit. The mixer circuit is used to mix and process the signal and transmit it to the filter circuit.

[0066] The filtering circuit is used to filter the mixed signal and transmit it to the amplifier circuit.

[0067] The combiner circuit is used to combine at least two signals and transmit them to the analog-to-digital converter circuit.

[0068] The analog-to-digital converter circuit is used to convert the signal from analog to digital and transmit it to the baseband processing circuit.

[0069] The baseband processing circuit is used to demodulate, descramble, despread, and decode the signal and send a feedback signal to the parameter adjustment circuit.

[0070] The parameter adjustment circuit is used to adjust the mixing and filtering parameters according to the feedback signal; the signal mixing process includes a first mixer circuit and a second mixer circuit. The signal filtering process includes a first filter circuit and a second filter circuit.

[0071] Sending feedback signals to the parameter adjustment circuits includes sending feedback signals to the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit. Adjusting the mixing and filtering parameters based on the feedback signals includes adjusting the mixing parameters using the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit. Each of the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit includes a microcontroller control system electrically connected to a digital potentiometer. The microcontroller control system controls the digital potentiometer based on the feedback signals, and the digital potentiometer is used to adjust the mixing circuit or the filtering circuit.

[0072] In practice, mixing circuits are mostly implemented using transistors. The output signal can be adjusted by adjusting the resistance of the input or output signal branch. Filtering circuits mostly use LC circuits. The output signal can be adjusted by adjusting the resistance of the input or output signal branch. Therefore, the digital potentiometer of this application can not only adjust the corresponding resistance but also achieve electronic adjustment.

[0073] In implementation, the combiner circuit combines at least two signals and transmits them to the analog-to-digital converter circuit; the analog-to-digital converter circuit converts the signals from analog to digital and transmits them to the baseband processing circuit; the baseband processing circuit demodulates, descrambles, despreads, and decodes the signals and sends a feedback signal to the parameter adjustment circuit; the parameter adjustment circuit adjusts the mixing and filtering parameters according to the feedback signal; the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit all include digital potentiometers. The filter parameter adjustment circuit and the second filter parameter adjustment circuit share a single-chip microcomputer control system. The single-chip microcomputer control system is electrically connected to each digital potentiometer. The single-chip microcomputer control system controls the digital potentiometers according to the feedback signal. The digital potentiometers are used to adjust the mixer circuit or the filter circuit. The single-chip microcomputer control system is also used to input test signals to the first mixer circuit and the second mixer circuit. It is also used to separate the test signals from the feedback signal of the baseband processing circuit and determine the mixing quality of the first mixer circuit and the second mixer circuit. Then, based on the mixing quality, it controls the digital potentiometers to adjust the mixer circuit.

[0074] In practice, the radio frequency interface receives radio frequency signals and transmits them to the preprocessing circuit.

[0075] The preprocessing circuit receives radio frequency signals and performs preprocessing, which includes initial filtering and amplification.

[0076] The power divider circuit splits the preprocessed signal into two signals and transmits them to the mixer circuit.

[0077] The mixing circuit described above mixes the signal and transmits it to the filtering circuit.

[0078] The filtering circuit filters the mixed signal and transmits it to the amplifier circuit.

[0079] The amplifier circuit amplifies the mixed and filtered signal again and transmits it to the phase shifter or combiner.

[0080] The phase shifter circuit described above will perform phase shifting on at least one signal and transmit it to the combiner;

[0081] The combiner circuit combines at least two signals and transmits them to the analog-to-digital converter circuit.

[0082] The analog-to-digital converter circuit converts the signal from analog to digital and transmits it to the baseband processing circuit.

[0083] The baseband processing circuit demodulates, descrambles, despreads, and decodes the signal, and sends a feedback signal to the parameter adjustment circuit.

[0084] The parameter adjustment circuit adjusts the mixing and filtering parameters based on the feedback signal.

[0085] The parameter adjustment circuit adjusts the mixing and filtering parameters according to the feedback signal. The microcontroller control system, which includes the parameter adjustment circuit, also inputs test signals to the first mixer circuit and the second mixer circuit. It separates the test signals from the feedback signals of the baseband processing circuit and determines the mixing quality of the first mixer circuit and the second mixer circuit. Then, it controls the digital potentiometer based on the mixing quality to adjust the mixing circuit.

[0086] This application retains the functionality of existing technologies that require only one RF receiver port and one AD conversion circuit to achieve quadrature mixing of RF signals. Furthermore, the parameter adjustment circuit of this application adjusts the mixing and filtering parameters according to the feedback signal, which can improve the signal processing quality from RF signal reception to transmission to baseband and increase the signal-to-noise ratio.

[0087] In a specific implementation, the combiner-based radio frequency processing system of this application includes a radio frequency interface, a preprocessing circuit, a power divider circuit, a mixer circuit, a filter circuit, an amplifier circuit, a phase shifter circuit, a combiner circuit, an analog-to-digital converter circuit, a baseband processing circuit, and a parameter adjustment circuit. The mixer circuit includes a first mixer circuit and a second mixer circuit. The filter circuit includes a first filter circuit and a second filter circuit. The parameter adjustment circuit includes a first mixer parameter adjustment circuit, a second mixer parameter adjustment circuit, a first filter parameter adjustment circuit, and a second filter parameter adjustment circuit. The radio frequency interface, the preprocessing circuit, and the power divider circuit are electrically connected sequentially. The power divider circuit is electrically connected to the first mixer circuit and the second mixer circuit, respectively. The first mixer circuit is connected to the first filter circuit. The amplifier circuit, phase shifter circuit, and combiner circuit are electrically connected in sequence. The second mixer circuit is electrically connected in sequence to the second filter circuit, amplifier circuit, phase shifter circuit, and combiner circuit. The combiner circuit is electrically connected in sequence to the analog-to-digital converter circuit and baseband processing circuit. The baseband processing circuit is electrically connected to the first mixer parameter adjustment circuit, the second mixer parameter adjustment circuit, the first filter parameter adjustment circuit, and the second filter parameter adjustment circuit, respectively. The first mixer parameter adjustment circuit is electrically connected to the first mixer circuit; the second mixer parameter adjustment circuit is electrically connected to the second mixer circuit; the first filter parameter adjustment circuit is electrically connected to the first filter circuit; and the second filter parameter adjustment circuit is electrically connected to the second filter circuit. The RF interface is used to receive RF signals and transmit them to the preprocessing circuit.

[0088] The aforementioned preprocessing circuit is used to receive radio frequency signals and perform preprocessing, which includes initial filtering and amplification.

[0089] The power divider circuit is used to split the preprocessed signal into two signals and transmit them to the mixer circuit.

[0090] The aforementioned mixing circuit is used to mix the signal and transmit it to the filtering circuit;

[0091] The filtering circuit is used to filter the mixed signal and transmit it to the amplifier circuit.

[0092] The amplifier circuit described above is used to amplify the mixed and filtered signal again and transmit it to the phase shifter or combiner.

[0093] The phase shifter circuit is used to perform phase shifting on at least one signal and transmit it to the combiner;

[0094] The combiner circuit is used to combine at least two signals and transmit them to the analog-to-digital converter circuit.

[0095] The analog-to-digital converter circuit is used to convert the signal from analog to digital and transmit it to the baseband processing circuit.

[0096] The baseband processing circuit is used to demodulate, descramble, despread, and decode the signal and send a feedback signal to the parameter adjustment circuit.

[0097] The parameter adjustment circuit is used to adjust the mixing and filtering parameters according to the feedback signal; the signal mixing process includes a first mixer circuit mixing the signal and a second mixer circuit mixing the signal; the signal filtering process includes a first filter circuit filtering the signal and a second filter circuit filtering the signal; sending feedback signals to the parameter adjustment circuit includes sending feedback signals to the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit; adjusting the mixing and filtering parameters according to the feedback signal includes adjusting the mixing parameters by the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit. The first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit all include a microcontroller control system electrically connected to a digital potentiometer. The microcontroller control system controls the digital potentiometer according to a feedback signal, and the digital potentiometer is used to adjust the mixing circuit or the filtering circuit; or, the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit all include a digital potentiometer, and the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, the second filtering ... The two filter parameter adjustment circuits share a single microcontroller control system. The microcontroller control system is electrically connected to each digital potentiometer. The microcontroller control system controls the digital potentiometers according to the feedback signal. The digital potentiometers are used to adjust the mixing circuit or the filter circuit. Preferably, the microcontroller control system is also used to input test signals to the first mixer circuit and the second mixer circuit, and is also used to separate the test signals from the feedback signal of the baseband processing circuit and determine the mixing quality of the first mixer circuit and the second mixer circuit. Then, based on the mixing quality, the digital potentiometers are controlled to adjust the mixing circuit.

[0098] This application also discloses a radio frequency processing method based on a combiner, which includes the following steps:

[0099] The radio frequency interface receives radio frequency signals and transmits them to the preprocessing circuit.

[0100] The preprocessing circuit receives radio frequency signals and performs preprocessing, which includes initial filtering and amplification.

[0101] The power divider circuit splits the preprocessed signal into two signals and transmits them to the mixer circuit.

[0102] The mixing circuit described above mixes the signal and transmits it to the filtering circuit.

[0103] The filtering circuit filters the mixed signal and transmits it to the amplifier circuit.

[0104] The amplifier circuit amplifies the mixed and filtered signal again and transmits it to the phase shifter or combiner.

[0105] The phase shifter circuit described above will perform phase shifting on at least one signal and transmit it to the combiner;

[0106] The combiner circuit combines at least two signals and transmits them to the analog-to-digital converter circuit.

[0107] The analog-to-digital converter circuit converts the signal from analog to digital and transmits it to the baseband processing circuit.

[0108] The baseband processing circuit demodulates, descrambles, despreads, and decodes the signal, and sends a feedback signal to the parameter adjustment circuit.

[0109] The parameter adjustment circuit adjusts the mixing and filtering parameters based on the feedback signal;

[0110] Furthermore, the parameter adjustment circuit adjusts the mixing and filtering parameters according to the feedback signal. The microcontroller control system, including the parameter adjustment circuit, also inputs test signals to the first and second mixer circuits, and separates the test signals from the feedback signal of the baseband processing circuit to determine the mixing quality of the first and second mixer circuits. Then, it controls the digital potentiometer based on the mixing quality to adjust the mixing circuit. It can be seen that the adjustment of the mixing circuit in this application is based on dynamic mixing quality control, which can dynamically improve the mixing quality. Correspondingly, adjusting the filtering parameters can dynamically enhance the filtering quality. This application can retain the prior art's requirement of only one RF receiving port and only one AD conversion circuit to achieve the purpose of quadrature mixing of RF signals (all mixing in this application can adopt quadrature mixing). In addition, the parameter adjustment circuit of this application can also improve the signal processing quality from RF signal reception to transmission to the baseband, and improve the signal-to-noise ratio of the signal.

Claims

1. A combiner-based radio frequency processing system, comprising a radio frequency interface, a preprocessing circuit, a power divider circuit, a mixer circuit, a filter circuit, an amplifier circuit, a phase shifter circuit, a combiner circuit, and an analog-to-digital converter circuit, characterized in that, It also includes a baseband processing circuit and a parameter adjustment circuit. The mixing circuit includes a first mixer circuit and a second mixer circuit. The filtering circuit includes a first filter circuit and a second filter circuit. The parameter adjustment circuit includes a first mixing parameter adjustment circuit, a second mixing parameter adjustment circuit, a first filtering parameter adjustment circuit, and a second filtering parameter adjustment circuit. The mixing circuit is used to mix and process the signal and transmit it to the filtering circuit. The filtering circuit is used to filter the mixed signal and transmit it to the amplifier circuit. The combiner circuit is used to combine at least two signals and transmit them to the analog-to-digital converter circuit. The analog-to-digital converter circuit is used to convert the signal from analog to digital and transmit it to the baseband processing circuit. The baseband processing circuit is used to demodulate, descramble, despread, and decode the signal and send a feedback signal to the parameter adjustment circuit. The parameter adjustment circuit is used to adjust the mixing and filtering parameters according to the feedback signal. The RF interface, preprocessing circuit, and power divider circuit are electrically connected in sequence. The power divider circuit is electrically connected to the first mixer circuit and the second mixer circuit respectively. The first mixer circuit is electrically connected to the first filter circuit, amplifier circuit, phase shifter circuit, and combiner circuit in sequence. The second mixer circuit is electrically connected to the second filter circuit, amplifier circuit, phase shifter circuit, and combiner circuit in sequence. The combiner circuit is electrically connected to the analog-to-digital conversion circuit and the baseband processing circuit in sequence. The circuit is electrically connected to the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit, respectively. The first mixing parameter adjustment circuit is electrically connected to the first mixer circuit; the second mixing parameter adjustment circuit is electrically connected to the second mixer circuit; the first filtering parameter adjustment circuit is electrically connected to the first filter circuit; and the second filtering parameter adjustment circuit is electrically connected to the second filter circuit. The number of RF interfaces is configured to be one, and the number of analog-to-digital conversion circuits is configured to be one, so as to realize that only one RF interface and one analog-to-digital conversion circuit are needed to complete the quadrature mixing of RF signals.

2. The combiner-based radio frequency processing system according to claim 1, characterized in that, The signal mixing process includes a first mixer circuit mixing the signal and a second mixer circuit mixing the signal.

3. The combiner-based radio frequency processing system according to claim 1, characterized in that, The signal filtering includes a first filter circuit for signal filtering and a second filter circuit for signal filtering.

4. The combiner-based radio frequency processing system according to claim 1, characterized in that, Sending feedback signals to the parameter adjustment circuits includes sending feedback signals to the first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filter parameter adjustment circuit, and the second filter parameter adjustment circuit.

5. The combiner-based radio frequency processing system according to claim 1, characterized in that, The adjustment of mixing and filtering parameters based on feedback signals includes the adjustment of mixing parameters by a first mixing parameter adjustment circuit, the adjustment of mixing parameters by a second mixing parameter adjustment circuit, the adjustment of filtering parameters by a first filtering parameter adjustment circuit, and the adjustment of filtering parameters by a second filtering parameter adjustment circuit.

6. The combiner-based radio frequency processing system according to claim 1, characterized in that, The first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit all include a microcontroller control system and a digital potentiometer that are electrically connected. The microcontroller control system controls the digital potentiometer according to the feedback signal, and the digital potentiometer is used to adjust the mixing circuit or the filtering circuit.

7. The combiner-based radio frequency processing system according to claim 1, characterized in that, The first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit all include digital potentiometers. The first mixing parameter adjustment circuit, the second mixing parameter adjustment circuit, the first filtering parameter adjustment circuit, and the second filtering parameter adjustment circuit share a single microcontroller control system. The single microcontroller control system is electrically connected to each digital potentiometer. The single microcontroller control system controls the digital potentiometers according to feedback signals. The digital potentiometers are used to adjust the mixing circuit or the filtering circuit.

8. The combiner-based radio frequency processing system according to claim 6 or 7, characterized in that, The microcontroller control system is also used to input test signals to the first mixer circuit and the second mixer circuit, and to separate the test signals from the feedback signals of the baseband processing circuit and determine the mixing quality of the first mixer circuit and the second mixer circuit. Then, based on the mixing quality, it controls the digital potentiometer to adjust the mixing circuit.

9. A combiner-based radio frequency processing method applied to the system of claim 1, characterized in that, Including the following steps: The radio frequency interface receives radio frequency signals and transmits them to the preprocessing circuit. The preprocessing circuit receives radio frequency signals and performs preprocessing, which includes initial filtering and amplification. The power divider circuit splits the preprocessed signal into two signals and transmits them to the mixer circuit. The mixing circuit described above mixes the signal and transmits it to the filtering circuit. The filtering circuit filters the mixed signal and transmits it to the amplifier circuit. The amplifier circuit amplifies the mixed and filtered signal again and transmits it to the phase shifter or combiner. The phase shifter circuit described above will perform phase shifting on at least one signal and transmit it to the combiner; The combiner circuit combines at least two signals and transmits them to the analog-to-digital converter circuit. The analog-to-digital converter circuit converts the signal from analog to digital and transmits it to the baseband processing circuit. The baseband processing circuit demodulates, descrambles, despreads, and decodes the signal, and sends a feedback signal to the parameter adjustment circuit. The parameter adjustment circuit adjusts the mixing and filtering parameters based on the feedback signal.

10. The radio frequency processing method based on combiner according to claim 9, characterized in that, The parameter adjustment circuit adjusts the mixing and filtering parameters according to the feedback signal. The microcontroller control system, which includes the parameter adjustment circuit, also inputs test signals to the first mixer circuit and the second mixer circuit. It separates the test signals from the feedback signals of the baseband processing circuit and determines the mixing quality of the first mixer circuit and the second mixer circuit. Then, it controls the digital potentiometer based on the mixing quality to adjust the mixing circuit.

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