WO2024104198A1 - 射频信号处理方法、电路、通信装置、设备及存储介质 - Google Patents

射频信号处理方法、电路、通信装置、设备及存储介质 Download PDF

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Publication number
WO2024104198A1
WO2024104198A1 PCT/CN2023/129651 CN2023129651W WO2024104198A1 WO 2024104198 A1 WO2024104198 A1 WO 2024104198A1 CN 2023129651 W CN2023129651 W CN 2023129651W WO 2024104198 A1 WO2024104198 A1 WO 2024104198A1
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Prior art keywords
signal
signals
processing
digital
analog
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PCT/CN2023/129651
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English (en)
French (fr)
Inventor
王珊
江宇亭
韦兆碧
孟博
杨云博
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中兴通讯股份有限公司
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Publication of WO2024104198A1 publication Critical patent/WO2024104198A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

Definitions

  • the present application relates to the field of communication technology, and in particular to a radio frequency signal processing method, circuit, communication device, equipment and storage medium.
  • each frequency band signal has a separate transmission link and reception link
  • the number of RF circuit components is large, the volume is large, and the power consumption is high. How to achieve miniaturization and low power consumption of RF circuits is an issue that needs to be discussed urgently.
  • Embodiments of the present application provide a radio frequency signal processing method, circuit, communication device, equipment and storage medium.
  • an embodiment of the present application provides a method for processing a radio frequency signal, the method comprising: obtaining at least two groups of baseband IQ signals, wherein the frequency bands and/or frequency band formats of the baseband IQ signals are different, at least one group of the baseband IQ signals are TDD signals, and at least one group of the baseband IQ signals are FDD signals; performing calibration compensation processing on the baseband IQ signals according to feedback IQ signals to obtain calibration signals, wherein the feedback IQ signals are collected through a feedback link; performing frequency shift combining processing on at least two groups of the calibration signals to obtain a combined signal.
  • an embodiment of the present application provides a radio frequency circuit, comprising: a digital processing unit, configured to perform calibration compensation processing on at least two groups of baseband IQ signals obtained according to a feedback IQ signal to obtain a calibration signal; the digital processing unit is also configured to perform frequency shifting and combining processing on at least two groups of calibration signals to obtain a combined signal; wherein at least one group of the baseband IQ signals is a TDD signal, and at least one group of the baseband IQ signals is an FDD signal; a feedback link, configured to sample the analog transmit signal to obtain the feedback IQ signal.
  • an embodiment of the present application provides a communication device, comprising a radio frequency circuit as in the second aspect.
  • an embodiment of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the radio frequency signal processing method in the first aspect is implemented.
  • an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, and the computer can implement the radio frequency signal processing method in the first aspect when executing the computer program.
  • an embodiment of the present application provides a computer program product, including a computer program or a computer instruction, wherein the computer program or the computer instruction is stored in a computer-readable storage medium, a processor of a computer device reads the computer program or the computer instruction from the computer-readable storage medium, and the processor executes the computer program or the computer instruction.
  • the program or the computer instruction enables the computer device to execute the radio frequency signal processing method in the first aspect as described above.
  • FIG1 is a schematic diagram of a radio frequency circuit provided by the related art
  • FIG2 is a schematic diagram of a radio frequency circuit provided in an embodiment of the present application.
  • FIG3 is a schematic diagram of a radio frequency circuit provided in another embodiment of the present application.
  • FIG4 is a schematic diagram of a radio frequency circuit provided in another embodiment of the present application.
  • FIG5 is a schematic diagram of a three-band combining radio frequency circuit provided in an embodiment of the present application.
  • FIG6 is a schematic diagram of a dual-band combined radio frequency circuit provided in an embodiment of the present application.
  • FIG7 is a flow chart of a method for processing radio frequency signals provided by an embodiment of the present application.
  • FIG8 is a flow chart of a radio frequency signal processing method provided by another embodiment of the present application.
  • FIG. 9 is a schematic diagram of the structure of an electronic device provided in one embodiment of the present application.
  • words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the embodiments of the present application in combination with the specific content of the technical solution.
  • words such as “further”, “exemplarily” or “optionally” are used to represent examples, illustrations or explanations, and should not be interpreted as being more preferred or more advantageous than other embodiments or design solutions.
  • the use of words such as “further”, “exemplarily” or “optionally” is intended to present related concepts in a specific way.
  • the baseband processing unit (Building Base band Unit, BBU) transmits the baseband IQ signal to the radio remote unit (Radio Remote Unit, RRU), where the IQ signal is a co-directional orthogonal signal, I is In-Phase, and Q is Quadrature (phase shift of 90 degrees), which means that the two channels have a phase difference of 90 degrees.
  • BBU Building Base band Unit
  • RRU Radio Remote Unit
  • the transmitting link workflow of the radio frequency circuit in the RRU is as follows: the received baseband IQ signal is digitally processed by the digital processing unit, and then the processed signal is converted from digital to analog by the digital and analog conversion unit to obtain an analog signal, which is then sent to the radio frequency processing unit for post-stage radio frequency processing. Finally, the radio frequency processed signal is filtered by the frequency selection unit and then transmitted through the antenna unit.
  • the receiving link workflow of the radio frequency circuit is as follows: after the signal is received by the antenna unit, it is filtered by the frequency selection unit and then handed over to the radio frequency processing unit for radio frequency processing. After the radio frequency processing is completed, the signal enters the digital and analog conversion unit to be converted into a digital signal, and then is digitally processed by the digital processing unit. The processed digital signal is transmitted to the BBU.
  • each band requires a separate transmission link and receiving link, as shown in Figure 1, when 4 bands (band1, band2, band3, band4) need to be transmitted and received, 4 transmission links and 4 receiving links are required, the digital processing unit requires 8 digital processing modules, the digital and analog conversion unit requires 4 digital-to-analog conversion modules and 4 analog-to-digital conversion modules, and the radio frequency processing unit requires 8 radio frequency processing modules. Therefore, the radio frequency circuit in the related art has the problems of large number of components, large size, and high power consumption.
  • the embodiments of the present application provide a radio frequency signal processing method, circuit, communication device, equipment and storage medium.
  • a radio frequency signal processing method By combining signals of different bands in the digital domain, multiple signals share a digital and analog conversion unit, a radio frequency processing unit and an antenna unit, thereby reducing the number of radio frequency circuit components, reducing the size and power consumption of the radio frequency circuit, and thus reducing the size and power consumption of a multi-band base station transceiver.
  • Fig. 2 is a schematic diagram of a radio frequency circuit provided by an embodiment of the present application, which is applied to a base station transceiver device.
  • the radio frequency circuit of the embodiment of the present application at least includes but is not limited to: a digital processing unit and a feedback link.
  • the digital processing unit is configured to perform calibration compensation processing on at least two groups of baseband IQ signals obtained according to the feedback IQ signal to obtain a calibration signal; the digital processing unit is also configured to perform frequency shift and combination processing on at least two groups of calibration signals to obtain a combined signal; wherein at least one baseband IQ signal is a time division duplex TDD signal, and at least one baseband IQ signal is a frequency division duplex FDD signal; the feedback link is configured to sample the analog transmission signal to obtain the feedback IQ signal.
  • the digital processing unit combines the TDD and FDD signals to obtain a combined signal, and transmits the combined signal to the digital and analog conversion unit for digital-to-analog conversion processing to obtain an analog combined signal, and transmits the analog combined signal to the radio frequency processing unit, and then performs amplification processing through the transmission amplification module and then performs branching processing to obtain modulated TDD signals and FDD signals for transmission, and the TDD signals and FDD signals for transmission are filtered in the frequency selection unit and then transmitted by the corresponding antenna module in the antenna unit.
  • the TDD signal and FDD signal for transmission are modulated by the branching process
  • the TDD signal and FDD signal for transmission are sampled respectively through the coupling module, and the sampling results are coupled and sent to the feedback link.
  • the modulation process is performed by the switch selection module, the analog-to-digital conversion module, and the digital processing module in the feedback link
  • the feedback IQ signal of the corresponding TDD signal and the feedback IQ signal of the FDD signal are obtained.
  • the feedback IQ signal is transmitted inside the data processing unit, and the digital processing unit performs pre-distortion compensation on the baseband IQ signal of the corresponding link according to the feedback IQ signal.
  • the module of the feedback link located in the digital processing unit transmits the feedback IQ signal obtained after processing to the module for digital processing of the baseband IQ signal in the digital processing unit, and performs calibration processing on the corresponding baseband IQ signal according to the feedback IQ signal to obtain a calibration signal.
  • the RF circuit of the embodiment of the present application realizes that signals of different frequency bands share a set of transmit and receive links by combining the TDD signal and the FDD signal and then processing the combined signal, thereby reducing the number of RF circuit components, reducing the size and power consumption of the RF circuit, and thus reducing the size and power consumption of the multi-band base station transceiver.
  • Fig. 3 is a schematic diagram of a radio frequency circuit provided by another embodiment of the present application, which is applied to a base station transceiver device.
  • the radio frequency circuit of the present embodiment includes a digital processing unit, a digital and analog conversion unit, a radio frequency processing unit, a frequency selection unit, an antenna unit and a feedback link.
  • the digital processing unit is configured to perform calibration compensation processing on at least two groups of baseband IQ signals obtained according to the feedback IQ signal to obtain a calibration signal; the digital processing unit is also configured to perform combination processing on the at least two groups of calibration signals to obtain a combined signal.
  • the digital and analog conversion unit is configured to perform digital-to-analog conversion processing on the combined signal to obtain an analog combined signal.
  • the radio frequency processing unit is configured to perform radio frequency amplification processing and branching processing on the analog combined signal to obtain at least two groups of analog transmission signals, wherein the analog transmission signals correspond to the baseband IQ signals one by one.
  • the frequency selection unit is configured to filter at least two groups of analog transmission signals to obtain transmission signals.
  • the antenna unit is configured to transmit signals and receive original signals; wherein the original signals may include but are not limited to mixed signals of FDD and TDD.
  • the feedback link is configured to sample the analog transmit signal to obtain a feedback IQ signal.
  • the signal corresponding to band1 is the time division duplexing (TDD) frequency band standard
  • the signal corresponding to band2 is the frequency division duplexing (FDD) frequency band standard.
  • TDD time division duplexing
  • FDD frequency division duplexing
  • the digital processing unit receives the band1 baseband IQ signal and the band2 baseband IQ signal from the BBU, processes the two groups of baseband IQ signals respectively and then combines them to obtain a combined signal (band1+band2), and transmits the combined signal to the digital and analog conversion unit for digital-to-analog conversion, converts the combined signal from a digital signal to an analog signal, obtains an analog combined signal and transmits it to the RF processing module; the transmitting amplification module in the RF processing unit performs RF amplification and branching processing on the analog combined signal to obtain an analog transmit signal corresponding to the band1 baseband IQ signal and an analog transmit signal corresponding to the band2 baseband IQ signal, input one (a group of analog combined signals) and output two (the analog transmit signal of band1 and the analog transmit signal of band2); the two groups of analog transmit signals are transmitted to the frequency selection unit for filtering processing to obtain two transmit signals, and the antenna unit transmits the two transmit signals through an antenna module.
  • the feedback link includes two coupling modules, a switch selection module, an analog-to-digital conversion module and a digital processing module.
  • the two coupling modules are respectively configured to collect the analog transmission signal of band1 and the analog transmission signal of band2, and couple the collected sample signals to the switch selection module of the feedback link (as shown by the dotted arrow in Figure 3).
  • the switch selection module selects the coupled sample signals and transmits the sample signals of band1 and bang2 to the analog-to-digital conversion module for analog-to-digital conversion, and then digitally processes the sample signals converted into analog signals through the digital processing module to obtain feedback IQ signals of band1 and feedback IQ signals of band2, respectively.
  • the feedback IQ signals are used to calibrate and compensate the baseband IQ signals to be transmitted next time. Through calibration and compensation in the digital domain, the effects of distortion and interference caused by multiple band signals sharing the RF channel are reduced.
  • the signal processing process of the RF circuit during reception is as follows.
  • the antenna unit receives the original signal and transmits it to the frequency selection unit.
  • the frequency selection unit filters the original signal to obtain the received signal of band 1 and the received signal of band 2, and transmits the received signal of band 1 and the received signal of band 2 to the RF processing unit.
  • the RF processing unit processes the received signal of band 1 and the received signal of band 2 through two low noise amplifiers (Low Noise Amplifier, LNA) respectively to obtain the amplified received signal of band 1 and the amplified received signal of band 2.
  • LNA Low Noise Amplifier
  • the RF processing unit combines the amplified received signal of band 1 and the amplified received signal of band 2 to obtain a combined received signal, and transmits the combined received signal to the digital and analog conversion unit for analog-to-digital conversion, converts the combined received signal from an analog signal to a digital signal, obtains a digital combined signal and transmits it to the digital processing unit.
  • the digital processing unit performs branching processing on the digital combined signal to obtain the received IQ signal of band1 and the received IQ signal of band2. It can be understood that the received IQ signal of band1 can be transmitted to the IQ signal of band1 of the BBU after being processed by the receiving link, and the received IQ signal of band2 can be transmitted to the IQ signal of band2 of the BBU after being processed by the receiving link.
  • the RF circuit of the present application may include multiple groups of circuit settings such as the combining of band1 and band2 mentioned above; as shown in Figure 3, the RF circuit includes two groups of circuit settings for combining signal transceiver links, one group is the combining transceiver link of band1 and band2, and one group is the combining transceiver link of band3 and band4, and the two groups share a set of feedback links.
  • the radio frequency circuit of the embodiment of the present application combines signals of different bands and/or signals of different frequency band formats and then processes the combined signal.
  • a digital-to-analog conversion module, a transmission amplification module, and a group of antenna modules can be shared in the transmission link, and a group of antenna modules and an analog-to-digital conversion module can be shared in the receiving link; multiple signals share a digital and analog conversion unit, a radio frequency processing unit, and an antenna unit, that is, signals of different frequency band formats share a set of transmission and reception links, the number of radio frequency circuit components is reduced, the size and power consumption of the radio frequency circuit are reduced, and thus the size and power consumption of the multi-band base station transceiver are reduced.
  • the digital processing unit uses a digital pre-distortion algorithm to perform calibration and compensation processing on the baseband IQ signal.
  • the digital processing unit may further combine the signals of the three bands, such as combining the signal of band 1, the signal of band 2, and the signal of band 3 and then performing signal processing on the combined signal.
  • the digital processing unit may implement multi-band signal processing via a large bandwidth.
  • the digital processing unit includes at least two first digital oscillators and at least one combiner; the first digital oscillators are configured to perform frequency shift processing on the calibration signal, and the combiner is configured to combine at least two groups of processed calibration signals to obtain a combined signal.
  • two digital oscillators perform frequency shifting on the baseband IQ signal of band1 and the baseband IQ signal of band2 respectively, and then combine the baseband IQ signal of band1 and the baseband IQ signal of band2 after the frequency shifting through a combiner to obtain a combined signal.
  • Multiple NCOs are used to frequency-shift and combine signals of different bands to achieve the combination of different bands and save the number of devices in the back-end link.
  • the digital processing unit includes at least two second digital oscillators and at least one splitter; the splitter is configured to perform splitting processing on the digital combination signal to obtain at least two groups of digital received signals; the second digital oscillator is configured to perform frequency shift processing on the digital received signal to obtain a received IQ signal, wherein the second digital oscillator corresponds one-to-one to the digital received signal.
  • band1 and band2 as an example, as shown in Figure 6, for the receiving link, when the digital combined signal is transmitted to the digital processing unit, the digital combined signal is split through the splitter to obtain the digital receiving signal of band1 and the digital receiving signal of band2; the two NCOs perform frequency shifting processing on the digital receiving signal of band1 and the digital receiving signal of band2 respectively to obtain the receiving IQ signal of band1 and the receiving IQ signal of band2.
  • Frequency shifting is performed through NCO to achieve targeted transmission of signals in the frequency band of interest and reduce interface overhead.
  • the digital processing unit performs calibration and compensation processing on the baseband IQ signal of band1 and the baseband IQ signal of band2 according to the feedback IQ signal of band1 and the feedback IQ signal of band2 obtained from the feedback link, so as to obtain the calibration signal of band1 and the calibration signal of band2;
  • two digital oscillators perform frequency shifting on the calibration signal of band1 and the calibration signal of band2, respectively, and then combine the calibration signal of band1 and the calibration signal of band2 after the frequency shifting through a combiner to obtain a combined signal.
  • the digital processing unit when it is necessary to combine signals of three frequency bands, band1, band2 and band3, the digital processing unit includes three digital oscillators and a combiner, and the three digital oscillators are used to perform frequency shifting processing on the signals of band1, band2 and band3 respectively, and then the frequency-shifted signals are combined by the combiner to obtain a combined signal; it can be understood that when it is necessary to combine signals of more frequency bands, the number of digital oscillators is increased accordingly.
  • the digital processing unit when it is necessary to combine the signals of band 1 and band 2, and to combine the signals of band 3 and band 4, includes four digital oscillators and two combiners, wherein two digital oscillators and one combiner form a group, which are configured to process the signals of band 1 and band 2; another two digital oscillators and one combiner form a group, which are configured to process the signals of band 3 and band 4.
  • the radio frequency processing unit includes at least one frequency converter and at least one power amplifier module; the frequency converter is configured to perform frequency conversion processing on the analog combined signal, and the power amplifier module is configured to amplify and branch the analog combined signal after the frequency conversion processing to obtain at least two groups of analog transmission signals.
  • a transmission link of the RF circuit includes a frequency converter and a power amplifier module in the RF processing unit, and the signals of multiple bands are combined and share a transmission link for signal processing.
  • the RF processing unit receives the analog combination signal, where the analog combination signal is the combination signal of band1 and band2 obtained through digital-to-analog conversion; the frequency converter in the RF processing unit performs frequency conversion on the analog combination signal, and transmits the frequency-converted analog combination signal to the power amplifier module, which performs frequency amplification and branching on the frequency-converted analog combination signal to obtain the analog transmission signal of band1 and the analog transmission signal of band2, and one input (analog combination signal) and two outputs (analog transmission signal of band1 and analog transmission signal of band2).
  • a frequency converter and a power amplifier module form a group.
  • a corresponding number of frequency converters and power amplifier modules are set; illustratively, when the RF processing unit needs to process the analog combination signal of the combination of band1 and band2 and the analog combination signal of the combination of band3 and band4, two frequency converters and two power amplifiers are set, wherein one pair of frequency converters and power amplifiers are set to process the analog combination signal of the combination of band1 and band2, and the other pair of frequency converters and power amplifiers are set to process the analog combination signal of the combination of band3 and band4, as shown in FIG6.
  • the combined signals are processed through a set of frequency converters and power amplifier modules, so that multiple bands can share a set of devices, thus saving the number of devices.
  • the RF processing unit includes at least one driving amplifier module and at least one power amplifier module; the driving amplifier module is configured to perform a first amplification process on the analog combined signal, and the power amplifier module is configured to perform a second amplification process and branching process on the analog combined signal after the first amplification process to obtain at least two groups of analog transmission signals.
  • a transmission link of the RF circuit includes a driver amplifier module and a power amplifier module in the RF processing unit, and the signals of multiple bands are combined and share a transmission link for signal processing.
  • the RF processing unit receives an analog combination signal, wherein the analog combination signal is obtained by digital-to-analog conversion of the combined signal of band1, band2, and band3; the driving amplifier module in the RF processing unit performs a first amplification process on the analog combination signal so that the analog combination signal can be transmitted to the power amplifier module for final amplification.
  • the power amplifier module performs a second amplification process and branch process on the analog combination signal that has undergone the first amplification process, and obtains an analog transmission signal of band1, an analog transmission signal of band2, and an analog transmission signal of band3, and outputs one (analog combination signal) and three (analog transmission signal of band1, analog transmission signal of band2, and analog transmission signal of band3).
  • the combined signal is processed through a set of driver amplifier modules and power amplifier modules, so that multiple bands can share a set of devices, thereby saving the number of devices.
  • the radio frequency processing unit includes at least one low noise amplifier, and the low noise amplifier is configured to amplify at least two groups of received signals, wherein the received signals have the same frequency band standard.
  • a receiving link of the RF circuit includes at least one low noise amplifier in the RF processing unit, and the low noise amplifier is configured to amplify at least two groups of received signals, wherein the frequency band format of each received signal is the same, both are time division duplexing (TDD) or frequency division duplexing (FDD).
  • TDD time division duplexing
  • FDD frequency division duplexing
  • band1 and band2 Take band1 and band2 as an example, where both band1 and band2 belong to the TDD standard.
  • the antenna unit receives the original signal and transmits it to the frequency selection unit, which filters the original signal to obtain the received signal of band1 and the received signal of band2 and transmits it to the RF processing unit. Since both band1 and band2 belong to the TDD standard, a low noise amplifier can be shared to amplify the received signal of band1 and the received signal of band2 to obtain the amplified received signal of band1 and the amplified received signal of band2, as shown in Figure 5.
  • the receiving signals of multiple bands of the same standard can save the receiving chain.
  • the number of components is reduced, the size of the RF circuit is reduced, and power consumption is reduced.
  • multiple LNAs may be configured to respectively amplify received signals of multiple bands, wherein the LNAs correspond to the bands one by one.
  • the RF processing unit includes a first low noise amplifier, a second low noise amplifier and a switch selection module, wherein the switch selection module is connected to the second low noise amplifier; the first low noise amplifier is configured to amplify the received signal of the FDD frequency band; and the second low noise amplifier is configured to amplify the received signal of the TDD frequency band after passing through the switch selection module.
  • a receiving link in a radio frequency circuit with two bands combined, includes a first LNA, a second LNA and a switch selection module in the radio frequency processing unit, and the first LNA and the second LNA amplify the receiving signals of the two bands respectively; it can be understood that a receiving link corresponds to a group of bands combined.
  • band1 and band2 Take band1 and band2 as an example, where band1 belongs to the FDD standard and band2 belongs to the TDD standard. As shown in Figure 6:
  • the antenna unit receives the original signal and transmits it to the frequency selection unit.
  • the frequency selection unit filters the original signal to obtain the received signal of band1 and the received signal of band2 and transmits it to the RF processing unit.
  • the received signal of band1 is directly transmitted to the first LNA for amplification, and the received signal of band2 is transmitted to the second LNA for amplification through the switch selection module to obtain the amplified received signal of band1 and the amplified received signal of band2 respectively.
  • the received signal of band1 and the received signal of band2 are amplified by the first LNA and the second LNA respectively, that is, the band signal of the FDD standard and the band signal of the TDD standard are amplified respectively, so as to realize the combined processing of multiple RF signals of different standards and frequency bands.
  • the RF processing unit includes at least one low noise amplifier and at least one analog cancellation module, the analog cancellation module is configured to perform analog cancellation processing on at least two groups of received signals, and the low noise amplifier is configured to amplify the received signals after the analog cancellation processing; wherein the frequency band standards of the received signals are different.
  • a receiving link includes an LNA and an analog cancellation module in the RF processing unit, as shown in FIG4 .
  • the antenna unit receives the original signal and transmits it to the frequency selection unit.
  • the frequency selection unit filters the original signal to obtain the receiving signal of band1 and the receiving signal of band2 and transmits them to the RF processing unit.
  • the receiving signal of band1 and the receiving signal of band2 share the same LNA for amplification. Since the frequency band standards of band1 and band2 are different, the receiving signal of band1 and the receiving signal of band2 are pre-processed by the analog cancellation module before being transmitted to the LNA to prevent the LNA from being saturated and burned.
  • the RF circuit also includes a feedback cancellation link, as shown in FIG4 , the feedback cancellation link includes a second coupling module, a second switch selection module, a feedback RF processing module, an analog-to-digital conversion module, and a digital processing module.
  • the second coupling module is configured to sample the analog transmission signal in the transmission link (transmitting end of the transmission amplification module), and couple the sample signals obtained by sampling in different transmission links to the second switch selection module, the second switch selection module selects the coupled sample signals and transmits them to the feedback RF processing module for RF amplification processing, the feedback RF processing module transmits the processed sample signals corresponding to each transmission link to the analog-to-digital conversion module for analog-to-digital conversion, and transmits the converted digital sample signals to the digital processing module for digital processing, and the results of the digital processing are used for the receiving link to offset the interference of the TDD co-frequency transmission signal.
  • FIG7 is a flow chart of a radio frequency signal processing method provided in an embodiment of the present application, which is applied to the radio frequency circuit of any of the above embodiments.
  • the radio frequency signal processing method of the present embodiment at least includes but is not limited to steps S2100, S2200, S2300, S2400, S2500, S2600.
  • Step S2100 Acquire at least two groups of baseband IQ signals, wherein the baseband IQ signals have different frequency bands and/or frequency band formats.
  • Step S2200 performing calibration compensation processing on the baseband IQ signal according to the feedback IQ signal to obtain a calibration signal, wherein the feedback IQ signal is acquired through a feedback link.
  • Step S2300 performing combination processing on at least two groups of calibration signals to obtain a combined signal.
  • Step S2400 performing digital-to-analog conversion processing on the combined signal to obtain an analog combined signal.
  • Step S2500 Perform RF amplification and branching processing on the analog combined signal to obtain at least two groups of analog transmit signals, wherein the analog transmit signals correspond one-to-one to the baseband IQ signals.
  • Step S2600 filtering at least two groups of analog transmission signals to obtain transmission signals.
  • the baseband IQ signal of band1 and the baseband IQ signal of band2 sent by the receiving BBU are calibrated and compensated according to the feedback IQ signal corresponding to band1 to obtain the calibration signal of band1
  • the baseband IQ signal of band2 is calibrated and compensated according to the feedback IQ signal corresponding to band2 to obtain the calibration signal of band2
  • the feedback IQ signal corresponding to band1 is obtained by sampling the analog transmission signal and the transmission signal of band1 through the feedback link
  • the feedback IQ signal corresponding to band2 is obtained by sampling the analog transmission signal and the transmission signal of band2 through the feedback link.
  • the calibration signal of band1 and the calibration signal of band2 are combined to obtain the combined signal (band1+band2), and the combined signal is converted from digital to analog to obtain the analog combined signal (band1+band2).
  • the analog combined signal is amplified and branched to obtain the analog transmission signal of band1 and the analog transmission signal of band2.
  • the analog transmission signal of band1 is filtered to obtain the transmission signal of band1, and the analog transmission signal of band2 is filtered to obtain the transmission signal of band2.
  • the transmission signal of band1 and the transmission signal of band2 are transmitted through the antenna.
  • radio frequency signal processing method of the present application can also process signals of three or more different bands, which is not specifically limited here.
  • the radio frequency signal processing method of the embodiment of the present application can process a group of signals or multiple groups of signals, wherein a group of signals includes at least two signals of different bands.
  • the RF signal processing method of the embodiment of the present application combines signals of different bands and then processes the combined signal, thereby realizing that multiple signals share a digital and analog conversion unit, a RF processing unit, and an antenna unit, thereby reducing the number of RF circuit components, reducing the size and power consumption of the RF circuit, and thus reducing the size and power consumption of a multi-band base station transceiver.
  • the RF signal processing method before step S2200, further includes at least but is not limited to the following steps: acquiring transmit IQ data according to the transmit signal; obtaining feedback data according to analog transmit signal sampling; and confirming the feedback IQ signal according to the transmit IQ data and the feedback data.
  • the signals of the corresponding bands are calibrated and compensated to reduce the effects of distortion and interference caused by multiple band signals sharing the RF channel.
  • step S2300 includes at least but is not limited to the following steps: performing frequency shift processing on at least two groups of calibration signals respectively; combining the calibration signals after the frequency shift processing to obtain a combined signal.
  • performing frequency shift processing on at least two groups of calibration signals respectively combining the calibration signals after the frequency shift processing to obtain a combined signal.
  • frequency shift processing is performed on the calibration signal of band1 and the calibration signal of band2 respectively, and the processed calibration signal of band1 and the processed calibration signal of band2 are combined to obtain a combined signal (band1+band2).
  • FIG8 is a flow chart of a radio frequency signal processing method provided by another embodiment of the present application, which is applied to the radio frequency circuit of any of the above embodiments.
  • the radio frequency signal processing method of the present embodiment at least includes but is not limited to steps S3100, S3200, S3300, S3400, S3500, and S3600.
  • Step S3100 obtaining an original signal received by the antenna unit
  • Step S3200 filtering the original signal to obtain at least two groups of received signals, wherein the frequency bands and/or frequency band formats of the received signals are different;
  • Step S3300 performing low noise amplification processing on the received signal to obtain an amplified received signal
  • Step S3400 combining the amplified received signals to obtain a combined received signal
  • Step S3500 performing analog-to-digital conversion on the combined received signal to obtain a digital combined signal
  • Step S3600 perform branching processing on the digital combined signal to obtain at least two groups of received IQ signals, wherein the received IQ signals correspond one-to-one to the received signals.
  • the original signal sent by the terminal is received through the antenna, and the original signal is filtered to obtain the received signal of band1 and the received signal of band2; the received signal of band1 and the received signal of band2 are low-noise amplified to obtain the amplified received signal of band1 and the amplified received signal of band2; the amplified received signal of band1 and the amplified received signal of band2 are combined to obtain the combined received signal (band1+band2); the combined received signal is converted from analog to digital to obtain a digital combined signal; the digital combined signal is digitally processed and branched in the digital domain to obtain the received IQ signal of band1 and the received IQ signal of band2; finally, the received IQ signal of band1 and the received IQ signal of band2 are sent to the BBU.
  • the RF signal processing method of the embodiment of the present application combines signals of different bands and then processes the combined signal, thereby realizing that multiple signals share a digital and analog conversion unit and an antenna unit, reducing the number of RF circuit components, reducing the size and power consumption of the RF circuit, and thus reducing the size and power consumption of the multi-band base station transceiver.
  • step S3600 includes at least but is not limited to the following steps: performing branching processing on the digital combination signal to obtain at least two groups of digital received signals; performing frequency shifting processing on the at least two groups of digital received signals respectively to obtain at least received IQ signals, wherein the received IQ signals correspond one to one with the digital received signals.
  • the digital combination signal of band1 and band2 combined is branched to obtain a digital received signal of band1 and a digital received signal of band2; performing frequency shifting processing on the digital received signal of band1 to obtain a received IQ signal of band1, and performing frequency shifting processing on the digital received signal of band2 to obtain a received IQ signal of band2.
  • the signals of the concerned frequency bands can be transmitted in a targeted manner, thereby reducing the interface overhead.
  • step S3300 at least includes but is not limited to the following steps: performing analog cancellation processing on the received signal; performing low-noise amplification processing on the processed received signal using a low-noise amplifier to obtain an amplified received signal, wherein the amplified received signal corresponds one-to-one to the received signal.
  • the received signals of different bands share one LNA for amplification processing, which reduces the number of components in the receiving chain, reduces the size of the RF circuit, and reduces power consumption.
  • step S3300 at least includes but is not limited to the following steps: separating the received signals of different frequency bands to obtain FDD received signals and TDD received signals; using different low noise amplifiers to perform low noise amplification processing on the FDD received signals and the TDD received signals, respectively, to obtain corresponding amplified received signals.
  • separating the FDD and TDD received signals and processing them separately that is, amplifying the band signals of the FDD standard and the band signals of the TDD standard, multiple RF signals of different standards and frequency bands are combined and processed.
  • the RF signal processing method of the present application corresponds to the RF circuit of the present application.
  • the specific implementation details of each embodiment of the signal processing method can correspond to the signal processing flow of each component of the radio frequency circuit of the present application, and will not be repeated in detail.
  • FIG5 is a schematic diagram of a three-band combined RF circuit provided in an embodiment of the present application.
  • the RF circuit of this embodiment is configured to perform transceiver processing on signals of band1, band2 and band3.
  • One channel processes three bands, band1 is 1.8GHz FDD, band2 is 2.1GHz FDD, and band3 is 3.5G TDD.
  • the digital processing unit includes three first NCOs and a combiner, the digital and analog conversion unit includes a digital-to-analog conversion module, the radio frequency processing unit includes a driving method module and a power amplification module, the frequency selection unit includes a group of filters, and the antenna unit includes a group of antenna modules.
  • the digital processing unit further includes three second NCOs and a splitter, the digital and analog conversion unit further includes an analog-to-digital conversion module, the radio frequency processing unit further includes a first LNA, a second LNA and a first switch selection module, the first switch selection module is connected to the second LNA, the frequency selection unit includes a group of filters, and the antenna unit includes a group of antenna modules.
  • the transmitting link and the receiving link share a group of filters and a group of antenna modules.
  • the digital processing unit also includes a switchable NCO, which can switch NCO1, NCO2, and NCO3, where NCO1 corresponds to band1, NCO2 corresponds to band2, and NCO3 corresponds to band3;
  • the digital and analog conversion unit also includes an analog-to-digital conversion module, and the RF processing unit also includes a second switch selection module.
  • the transmission process is as follows: the digital processing unit uses a three-NCO method to combine the baseband IQ signals of the three bands in the digital domain.
  • the combined signals of the three bands enter the digital-to-analog converter (DAC) for digital-to-analog conversion.
  • the RF sampling DAC can be used to directly obtain the analog combined signals of the three bands.
  • the analog transmit signals of the three bands are respectively transmitted by the antenna after passing through the filters of each frequency band.
  • the receiving process is as follows: after the original signal is received by the antenna, it is filtered and distinguished by the filter to obtain the receiving signals of the three bands.
  • Band 1 and band 2 are FDD signals that share the first LNA, and the amplified receiving signals of band 1 and band 2 are obtained;
  • band 3 enters the second LNA after passing through the circulator and the first switch selection module to obtain the amplified receiving signal of band 3.
  • ADC analog-to-digital converter
  • the receiving IQ signals of the three bands are obtained and transmitted to the BBU.
  • the feedback signal passes through the second switch selection module and then enters the digital processing through the analog-to-digital converter ADC.
  • Different bands can be distinguished by switching NCO1/2/3 in the digital processing part.
  • FIG6 is a schematic diagram of a dual-band combined RF circuit provided in an embodiment of the present application.
  • the RF circuit of the present embodiment is configured to perform transceiver processing on signals of band1, band2 and/or band3, and band4.
  • One channel processes two bands, band1 is 1.8GHz FDD, band2 is 2.6GHz TDD, and band3 is 2.3G TDD, where band1 is 1T1R, band2 is 2T2R, and band3 is 1T1R.
  • the channels can be doubled.
  • the transmission process is as follows: the digital processing unit uses a dual NCO method to combine the two bands in the digital domain.
  • the combined signal of the two bands after combining enters the DAC for analog-to-digital conversion.
  • the RF sampling DAC can be used to directly output the analog combined signal, which can process signals with a larger bandwidth;
  • the intermediate frequency DAC can also be used to output the intermediate frequency, and then the frequency converter is used to achieve frequency conversion.
  • the analog combined signal after frequency conversion enters the power amplifier module, one input and two outputs, and the analog transmission signal of band1 and the analog transmission signal of band2 are obtained.
  • the analog transmission signal of band1 passes through the band1 transmission filter to obtain the transmission signal of band1 and then is sent from the air interface.
  • the analog transmission signal of band2 passes through the band2 filter to obtain the transmission signal of band2. The signal is then sent out from the antenna.
  • the receiving process is as follows: after the original signal is received through the antenna, band1 and band2 are distinguished through the filter to obtain the received signal of band1 and the received signal of band2.
  • the received signal of band1 passes through the LNA corresponding to band1 to obtain the amplified received signal of band1.
  • the received signal of band2 passes through the circulator and the switch and enters the LNA corresponding to band2 to obtain the amplified received signal of band2.
  • the two bands are combined to obtain a combined received signal.
  • the combined received signal enters the analog-to-digital conversion module to complete the digital signal conversion to obtain a digital combined signal.
  • the digital combined signal is branched in the digital domain and frequency-shifted through the NCO respectively to reduce the digital processing rate to obtain the received IQ signal of band1 and the received IQ signal of band2, which are then transmitted to the BBU.
  • the feedback signal After the feedback signal is selected by the switch, it enters the digital processing through the analog-to-digital converter ADC. Different bands can be distinguished by switching NCO1/2/3/4 in the digital processing unit.
  • FIG9 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present application.
  • the device includes a memory 1100, a processor 1200, and a communication device 1300.
  • the number of the memory 1100 and the processor 1200 may be one or more, and FIG9 takes one memory 1100 and one processor 1200 as an example; the memory 1100 and the processor 1200 in the device may be connected via a bus or other means, and FIG9 takes the connection via a bus as an example.
  • the memory 1100 is a computer-readable storage medium that can be used to store software programs, computer executable programs, and modules, such as program instructions/modules corresponding to the RF signal processing method provided in any embodiment of the present application.
  • the processor 1200 implements the above-mentioned RF signal processing method by running the software programs, instructions, and modules stored in the memory 1110.
  • the memory 1100 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function.
  • the memory 1100 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device.
  • the memory 1100 may include a memory remotely arranged relative to the processor 1200, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
  • the communication device 1300 is configured to perform information transmission and reception communication according to the control of the processor 1200 .
  • the communication device 1300 includes a receiver 1310 and a transmitter 1320.
  • the receiver 1310 is a module or a combination of devices for receiving data in an electronic device.
  • the transmitter 1320 is a module or a combination of devices for sending data in an electronic device.
  • An embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the radio frequency signal processing method provided in any embodiment of the present application.
  • An embodiment of the present application also provides a computer program product, including a computer program or computer instructions, which are stored in a computer-readable storage medium.
  • a processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, so that the computer device performs a radio frequency signal processing method as provided in any embodiment of the present application.
  • the embodiment of the present application combines the TDD signal and the FDD signal in the digital domain and processes the combined signal. Signals of different frequency bands share the digital and analog conversion unit, the radio frequency processing unit, the frequency selection unit and the antenna unit, thereby reducing the number of components and reducing the size and power consumption of the radio frequency circuit.
  • the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation.
  • Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit.
  • a processor such as a central processing unit, a digital signal processor or a microprocessor
  • Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium).
  • computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data).
  • Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer.
  • communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.
  • a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, or a computer.
  • applications running on a computing device and a computing device can be components.
  • One or more components may reside in a process or an execution thread, and a component may be located on a computer or distributed between two or more computers.
  • these components may be executed from various computer-readable media having various data structures stored thereon.
  • Components may communicate, for example, through a local or remote process based on a signal having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, or a network, such as the Internet interacting with other systems through signals).
  • a signal having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, or a network, such as the Internet interacting with other systems through signals).

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Abstract

本申请实施例提供了一种射频信号处理方法、电路、通信装置、设备及存储介质。方法包括：获取至少两组基带IQ信号(S2100)，其中，至少一组所述基带IQ信号为时分双工TDD信号，至少一组所述基带IQ信号为频分双工FDD信号；根据反馈IQ信号对所述基带IQ信号进行校准补偿处理，得到校准信号(S2200)，其中，所述反馈IQ信号通过反馈链路采集得到；对至少两组所述校准信号进行移频合路处理，得到合路信号(S2300)。

Description

射频信号处理方法、电路、通信装置、设备及存储介质
相关申请的交叉引用
本申请基于申请号为202211461870.X、申请日为2022年11月17日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及通信技术领域，尤其是一种射频信号处理方法、电路、通信装置、设备及存储介质。
背景技术
传统的多模、多频段基站都是分开收发信通道，即每一个频段信号的发送单独使用一条发射链路，每一个频段信号的接收单独使用一条接收链路。
相关技术中，由于每一个频段信号都是一条单独的发射链路和接收链路，导致射频电路器件数较多，体积较大，功耗较高。如何实现射频电路的小型化和低功耗，是当下亟待讨论的问题。
发明内容
本申请实施例提供一种射频信号处理方法、电路、通信装置、设备及存储介质。
第一方面，本申请实施例提供一种射频信号处理方法，所述方法包括：获取至少两组基带IQ信号，其中，所述基带IQ信号的频段和/或频段制式不同至少一组所述基带IQ信号为TDD信号，至少一组所述基带IQ信号为FDD信号；根据反馈IQ信号对所述基带IQ信号进行校准补偿处理，得到校准信号，其中，所述反馈IQ信号通过反馈链路采集得到；对至少两组所述校准信号进行移频合路处理，得到合路信号。
第二方面，本申请实施例提供一种射频电路，包括：数字处理单元，被设置为根据反馈IQ信号对获取的至少两组基带IQ信号进行校准补偿处理，得到校准信号；所述数字处理单元还被设置为对至少两组校准信号进行移频合路处理，得到合路信号；其中，至少一组所述基带IQ信号为TDD信号，至少一组所述基带IQ信号为FDD信号；反馈链路，被设置为对所述模拟发射信号进行采样，得到所述反馈IQ信号。
第三方面，本申请实施例提供一种通信装置，包括如第二方面中的射频电路。
第四方面，本申请实施例提供一种电子设备，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如第一方面中的射频信号处理方法。
第五方面，本申请实施例提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行所述计算机程序时实现如第一方面中的射频信号处理方法。
第六方面，本申请实施例提供一种计算机程序产品，包括计算机程序或计算机指令，所述计算机程序或所述计算机指令存储在计算机可读存储介质中，计算机设备的处理器从所述计算机可读存储介质读取所述计算机程序或所述计算机指令，所述处理器执行所述计算机程 序或所述计算机指令，使得所述计算机设备执行如上述第一方面中的射频信号处理方法。
附图说明
图1为相关技术提供的一种射频电路的示意图；
图2为本申请一实施例提供的一种射频电路的示意图；
图3为本申请另一实施例提供的一种射频电路的示意图；
图4为本申请另一实施例提供的一种射频电路的示意图；
图5为本申请一实施例提供的三band合路的射频电路的示意图；
图6为本申请一实施例提供的双band合路的射频电路的示意图；
图7为本申请一实施例提供的一种射频信号处理方法的流程图；
图8为本申请另一实施例提供的一种射频信号处理方法的流程图；
图9为本申请一实施例提供的一种电子设备结构示意图。
具体实施方式
为了使本申请的目的、技术方法及优点更加清楚明白，以下结合附图及实施例，对本申请进行详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
需要说明的是，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于流程图中的顺序执行所示出或描述的步骤。说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
本申请实施例的描述中，除非另有明确的限定，设置、安装、连接等词语应做广义理解，所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本申请实施例中的具体含义。本申请实施例中，“进一步地”、“示例性地”或者“可选地”等词用于表示作为例子、例证或说明，不应被解释为比其它实施例或设计方案更优选或更具有优势。使用“进一步地”、“示例性地”或者“可选地”等词旨在以具体方式呈现相关概念。
在相关技术中，多模、多频段基站都是采用分开收发信通道的方式实现，如图1所示，基带处理单元(Building Base band Unit，BBU)将基带IQ信号传输给射频拉远单元(Radio Remote Unit，RRU)，其中，IQ信号是同向正交信号，I是In-Phase，Q是Quadrature(相移90度)，即代表两路相位相差90度的信号。RRU中的射频电路的发射链路工作流程如下：将接收到的基带IQ信号通过数字处理单元进行数字处理，再将处理后的信号通过数字和模拟转换单元进行数模转换得到模拟信号后发送给射频处理单元进行后级射频处理，最后将经过射频处理的信号通过频率选择单元进行滤波后通过天线单元发射出去。射频电路的接收链路工作流程如下：通过天线单元接收信号后经过频率选择单元滤波后交给射频处理单元进行射频处理，完成射频处理后的信号进入数字和模拟转换单元转化为数字信号后通过数字处理单元进行数字处理，处理完成的数字信号传给BBU。
由于每一个band(频段)都需要一条单独的发射链路和接收链路，如图1所示，当需要进行4个band(band1、band2、band3、band4)的收发的时候，则需要4条发送链路和4条接收链路，数字处理单元需要8个数字处理模块，数字和模拟转换单元需要4个数模转换模块和4个模数转换模块，射频处理单元需要8个射频处理模块。因此相关技术中的射频电路存在器件数量多，体积较大，功耗较高的问题。
本申请实施例提供了一种射频信号处理方法、电路、通信装置、设备及存储介质，通过在数字域对不同的band的信号进行合路，多个信号共用数字和模拟转换单元、射频处理单元和天线单元，减少了射频电路器件数量，降低了射频电路的体积和功耗，从而降低了多频段基站收发机的体积和功耗。
下面结合附图，对本申请实施例做阐述。
图2是本申请一实施例提供的射频电路的示意图，应用于基站收发机设备。如图2所示，本申请实施例的射频电路至少包括但不限于：数字处理单元和反馈链路。
数字处理单元，被设置为根据反馈IQ信号对获取的至少两组基带IQ信号进行校准补偿处理，得到校准信号；数字处理单元还被设置为对至少两组校准信号进行移频合路处理，得到合路信号；其中，至少一个基带IQ信号为时分双工TDD信号，至少一个基带IQ信号为频分双工FDD信号；反馈链路，被设置为对模拟发射信号进行采样，得到反馈IQ信号。
数字处理单元将TDD和FDD信号合路后，得到合路信号，将合路信号传送到数字和模拟转换单元进行数模转换处理，得到模拟组合信号，将模拟组合信号传送到射频处理单元中，通过发射放大模块进行放大处理后进行分路处理得到调制后用于发射的TDD信号和FDD信号，用于发射的TDD信号和FDD信号在频率选择单元中进行滤波处理后，再由天线单元中对应的天线模块发射。
其中，分路处理得到调制后用于发射的TDD信号和FDD信号后，通过耦合模块分别对用于发射的TDD信号和FDD信号进行采样，并将采样结果耦合发送至反馈链路中，通过反馈链路中的开关选择模块、模数转换模块、数字处理模块进行调制处理后得到对应的TDD信号的反馈IQ信号和FDD信号的反馈IQ信号，反馈IQ信号在数据处理单元内部进行传递，数字处理单元根据反馈IQ信号，对对应的链路的基带IQ信号进行预失真补偿。如图2所示，反馈链路的位于数字处理单元的模块将处理后得到的反馈IQ信号传递至数字处理单元中用于对基带IQ信号进行数字处理的模块，根据反馈IQ信号对对应的基带IQ信号进行校准处理，得到校准信号。
本申请实施例的射频电路，通过对TDD信号和FDD信号进行合路后对合路信号进行处理，实现了不同频段制式的信号共用一套发射接收链路，减少了射频电路器件数量，降低了射频电路的体积和功耗，从而降低了多频段基站收发机的体积和功耗。
图3是本申请另一实施例提供的射频电路的示意图，应用于基站收发机设备。如图3所示，本实施例方案的射频电路包括数字处理单元、数字和模拟转换单元、射频处理单元、频率选择单元、天线单元和反馈链路。
数字处理单元，被设置为根据反馈IQ信号对获取的至少两组基带IQ信号进行校准补偿处理，得到校准信号；数字处理单元还被设置为对至少两组校准信号进行合路处理，得到合路信号。
数字和模拟转换单元，被设置为对合路信号进行数模转换处理，得到模拟组合信号。
射频处理单元，被设置为对模拟组合信号进行射频放大处理和分路处理，得到至少两组模拟发射信号，其中，模拟发射信号与基带IQ信号一一对应。
频率选择单元，被设置为将至少两组模拟发射信号进行滤波处理得到发射信号。
天线单元，被设置为发射信号和接收原始信号；其中，原始信号可以包括但不限于FDD和TDD混合的信号。
反馈链路，被设置为对模拟发射信号进行采样，得到反馈IQ信号。
以band1和band2两个频段的信号为例，其中，band1对应的信号为时分双工(Time Division Duplexing，TDD)频段制式，band2对应的信号为频分双工(Frequency Division Duplexing，FDD)频段制式，射频电路的发射时的信号处理过程如下。
数字处理单元接收到从BBU接收band1基带IQ信号和band2基带IQ信号，分别对两组基带IQ信号进行处理后合路，得到合路信号(band1+band2),并将合路信号传递至数字和模拟转换单元进行数模转换，将合路信号从数字信号转换为模拟信号，得到模拟组合信号并传递至射频处理模块；射频处理单元中的发射放大模块对模拟组合信号进行射频放大处理以及分路处理，得到与band1基带IQ信号对应的模拟发射信号和与band2基带IQ信号对应的模拟发射信号，进一(一组模拟组合信号)出二(band1的模拟发射信号和band2的模拟发射信号)；两组模拟发射信号传递至频率选择单元进行滤波处理，得到两个发射信号，天线单元通过一个天线模块将两个发射信号发进行发射。
反馈链路包括两个耦合模块、开关选择模块、模数转换模块和数字处理模块，两个耦合模块分别被设置为采集band1的模拟发射信号和band2的模拟发射信号，并将采集到的样本信号耦合传递至反馈链路的开关选择模块(如图3中虚线箭头所示)，开关选择模块对耦合的样本信号进行选择分别将band1的样本信号和bang2的样本信号传递至模数转换模块进行模数转换，再对转换成模拟信号的样本信号通过数字处理模块进行数字处理，分别得到band1的反馈IQ信号和band2的反馈IQ信号，反馈IQ信号用于对下一次需要发射的基带IQ信号进行校准补偿处理，通过数字域的校准和补偿，降低多个band信号共用射频通道引起的失真和干扰带来的影响。
射频电路的接收时的信号处理过程如下。
天线单元接收原始信号传递至频率选择单元，频率选择单元对原始信号进行滤波，得到band1的接收信号和band2的接收信号，并将band1的接收信号和band2的接收信号传递至射频处理单元，射频处理单元通过两个低噪声放大器(Low Noise Amplifier，LNA)，分别对band1的接收信号和band2的接收信号进行方法处理，得到band1的放大接收信号和band2的放大接收信号，射频处理单元对band1的放大接收信号和band2的放大接收信号进行合路处理得到组合接收信号，并将组合接收信号传递至数字和模拟转换单元进行模数转换，将组合接收信号从模拟信号转换为数字信号，得到数字组合信号并传递至数字处理单元。数字处理单元对数字组合信号进行分路处理，得到band1的接收IQ信号和band2的接收IQ信号，可以理解的是，band1的接收IQ信号即经过接收链路处理后可以传递给BBU的band1的IQ信号，band2的接收IQ信号即经过接收链路处理后可以传递给BBU的band2的IQ信号。
可以理解的是，上述描述是以band1和band2的合路处理为示例进行说明，本申请的射频电路可以包括多组如上述band1和band2的合路的电路设置；如图3所示，射频电路包括两组合路信号收发链路的电路设置，一组是band1和band2的合路收发链路，一组是band3和band4的合路收发链路，两组共用一套反馈链路。
本申请实施例的射频电路，通过对不同band的信号和/或不同频段制式的信号进行合路后对合路信号进行处理，TDD的band信号和FDD的band信号合路后，发射链路中可以共用一个数模转换模块、一个发射放大模块，一组天线模块，接收链路中可以共用一组天线模块、一个模数转换模块；多个信号共用数字和模拟转换单元、射频处理单元和天线单元，即实现了不同频段制式的信号共用一套发射接收链路，减少了射频电路器件数量，降低了射频电路的体积和功耗，从而降低了多频段基站收发机的体积和功耗。
在一些可行的实施方式中，数字处理单元采用数字预失真算法，对基带IQ信号进行校准补偿处理。
在一些可行的实施方式中，数字处理单元还可以对三个band的信号进行合路，如将band1的信号、band2的信号、band3的信号进行合路后再对合路信号进行信号处理。
在一些可行的实施方式中，数字处理单元可以通过大宽带实现多band信号处理。
在一实施例中，数字处理单元包括至少两个第一数字振荡器和至少一个合路器；第一数字振荡器被设置为对校准信号进行频率搬移处理，合路器被设置为对至少两组处理后的校准信号进行合路处理，得到合路信号。
同样以band1和band2为例，如图6所示，对于发射链路，两个数字振荡器(Numerically Controlled Oscillator，NCO)分别对band1的基带IQ信号和band2的基带IQ信号进行频率搬移，再通过合路器对进行频率搬移后的band1的基带IQ信号和band2的基带IQ信号进行合路处理，得到合路信号。
利用多NCO对不同band的信号进行频率搬移后合路，实现不同band的组合，节省后端链路的器件数量。
在一实施例中，数字处理单元包括至少两个第二数字振荡器和至少一个分路器；分路器被设置为对数字组合信号进行分路处理，得到至少两组数字接收信号；第二数字振荡器被设置为对数字接收信号进行频率搬移处理，得到接收IQ信号，其中，第二数字振荡器与数字接收信号一一对应。
以band1和band2为例，如图6所示，对于接收链路，当数字组合信号传递到数字处理单元，数字组合信号通过分路器进行分路处理，得到band1的数字接收信号和band2的数字接收信号；两个NCO分别对band1的数字接收信号和band2的数字接收信号进行频率搬移处理，得到band1的接收IQ信号和band2的接收IQ信号。
通过NCO进行移频，实现关注频段的信号的针对性传递，降低接口开销。
在一些可行的实施方式中，以band1和band2为例，数字处理单元根据从反馈链路获取的band1的反馈IQ信号和band2的反馈IQ信号分别对band1的基带IQ信号和band2的基带IQ信号进行校准补偿处理，得到band1的校准信号和band2的校准信号；两个数字振荡器分别对band1的校准信号和band2的校准信号进行频率搬移，再通过合路器对进行频率搬移后的band1的校准信号和band2的校准信号进行合路处理，得到合路信号。
在一些可行的实施方式中，需要对band1、band2和ban3三个频段的信号进行合路时，数字处理单元包括三个数字振荡器和一个合路器，通过三个数字振荡器分别对band1的信号、band2的信号和band3的信号进行频率搬移处理，再通过合路器对频率搬移后的信号进行合路，得到合路信号；可以理解的是，需要对更多的频段的信号进行合路时，对应增加数字振荡器的数量。
在一些可行的实施方式中，需要对band1、band2的信号进行合路，对band3、band4的信号进行合路时，数字处理单元包括四个数字振荡器和两个合路器，其中两个数字振荡器和一个合路器为一组，被设置为对band1和band2的信号进行处理；另外两个数字振荡器和一个合路器为一组，被设置为对band3和band4的信号进行处理。
在一实施例中，射频处理单元包括至少一个变频器和至少一个功率放大模块；变频器被设置为对模拟组合信号进行变频处理，功率放大模块被设置为对变频处理后的模拟组合信号进行放大处理和分路处理，得到至少两组模拟发射信号。
即射频电路的一条发射链路在射频处理单元中包括一个变频器和一个功率放大模块，多个band的信号合路后共用一条发射链路进行信号处理。
当射频电路对两个band的信号进行合路处理，以band1和band2合路为例。射频处理单元接收模拟组合信号，其中，模拟组合信号为band1和band2的合路信号经过数模转换得到；射频处理单元中的变频器对模拟组合信号进行变频处理，并将经过变频的模拟组合信号传递至功率放大模块，功率放大模块对经过变频的模拟组合信号进行频率放大处理和分路处理，得到band1的模拟发射信号和band2的模拟发射信号，进一(模拟组合信号)出二(band1的模拟发射信号和band2的模拟发射信号)。可以理解的是，一个变频器和一个功率放大模块为一组，当射频处理单元需要对多个模拟组合信号进行处理时，则设置对应数量的变频器和功率放大模块；示例性地，射频处理单元需要对band1、band2组合的模拟组合信号和band3、band4组合的模拟组合信号进行处理时，则设置两个变频器和两个功率放大器，其中一对变频器和功率放大器被设置为处理band1、band2组合的模拟组合信号，另一对变频器和功率放大器被设置为处理band3、band4组合的模拟组合信号，如图6所示。
通过一组变频器和功率放大模块对合路后的信号进行处理，实现多个band共用一组器件，从而节省器件数量。
在另一实施例中，射频处理单元包括至少一个驱动放大模块和至少一个功率放大模块；驱动放大模块被设置为对模拟组合信号进行第一次放大处理，功率放大模块被设置为对第一次放大处理后的模拟组合信号进行第二次放大处理和分路处理，得到至少两组模拟发射信号。
即射频电路的一条发射链路在射频处理单元中包括一个驱动放大模块和一个功率放大模块，多个band的信号合路后共用一条发射链路进行信号处理。
当射频电路对三个band的信号进行合路处理，以band1、band2、band3合路为例。如图5所示，射频处理单元接收模拟组合信号，其中，模拟组合信号为band1、band2和band3的合路信号经过数模转换得到；射频处理单元中的驱动放大模块对模拟组合信号进行第一放大处理，以使模拟组合信号能够传递至功率放大模块进行末级放大。功率放大模块对经过第一次放大处理的模拟组合信号进行第二次放大处理和分路处理，得到band1的模拟发射信号、band2的模拟发射信号以及band3的模拟发射信号，进一(模拟组合信号)出三(band1的模拟发射信号、band2的模拟发射信号和band3的模拟发射信号)。
通过一组驱动放大模块和功率放大模块对合路后的信号进行处理，实现多个band共用一组器件，从而节省器件数量。
在一实施例中，射频处理单元包括至少一个低噪声放大器，低噪声放大器被设置为对至少两组接收信号进行放大处理，其中，接收信号的频段制式相同。
即射频电路的一条接收链路在射频处理单元中包括至少一个低噪声放大器，低噪声放大器被设置为对至少两组接收信号进行放大处理，其中，每个接收信号的频段制式相同，都为时分双工(Time Division Duplexing，TDD)或都为频分双工(Frequency Division Duplex，FDD)。
以band1和band2为例，其中，band1和band2都属于TDD制式。天线单元接收原始信号传递给频率选择单元，频率选择单元对原始信号进行滤波处理，得到band1的接收信号和band2的接收信号并传递至射频处理单元，由于band1和band2都属于TDD制式，因此可以共用一个低噪声放大器对band1的接收信号和band2的接收信号进行放大处理，得到band1的放大接收信号和band2的放大接收信号，如图5所示。
通过将相同制式的多个band的接收信号共用一个LNA进行放大处理，节省了接收链路 的器件数量，减少了射频电路的体积，降低功耗。
在一些可行的实施方式中，也可以设置多个LNA分别对多个band的接收信号进行放大处理，其中，LNA和band一一对应。
在另一实施例中，射频处理单包括第一低噪声放大器、第二低噪声放大器和开关选择模块，其中，开关选择模块与第二低噪声放大器连接；第一低噪声放大器被设置为对FDD频段的接收信号进行放大处理；第二低噪声放大器被设置为对经过开关选择模块的TDD频段的接收信号进行放大处理。
即在两个band合路的射频电路中，一条接收链路在射频处理单元中包括一个第一LNA、一个第二LNA和一个开关选择模块，第一LNA和第二LNA分别对两个band的接收信号进行放大处理；可以理解的是，一条接收链路与一组band合路对应。
以band1和band2为例，其中，band1属于FDD制式，band2属于TDD制式。如图6所示:
天线单元接收原始信号传递给频率选择单元，频率选择单元对原始信号进行滤波处理，得到band1的接收信号和band2的接收信号并传递至射频处理单元；ban1的接收信号直接传递至第一LNA进行放大处理，band2的接收信号通过开关选择模块再传递至第二LNA进行放大处理，分别得到band1的放大接收信号和band2的放大接收信号。通过开关选择模块，band1的接收信号和band2的接收信号分别由第一LNA和第二LNA进行放大处理，即FDD制式的band信号和TDD制式的band信号分别进行放大，实现不同制式，不同频段的多个射频信号合并处理。
在另一实施例中，射频处理单元包括至少一个低噪声放大器和至少一个模拟抵消模块，模拟抵消模块被设置为对至少两组接收信号进行模拟抵消处理，低噪声放大器被设置为对模拟抵消处理后的接收信号进行放大处理；其中，接收信号的频段制式不同。
即在两个band合路的射频电路中，一条接收链路在射频处理单元中包括一个LNA和一个模拟抵消模块，如图4所示。
以band1和band2为例，其中，band1和band2的频段制式不同。如图4所示:
天线单元接收原始信号传递给频率选择单元，频率选择单元对原始信号进行滤波处理，得到band1的接收信号和band2的接收信号并传递至射频处理单元；band1的接收信号和band2的接收信号共用一个LNA进行放大处理，由于band1和band2的频段制式不同，在将band1的接收信号和band2的接收信号传递至LNA前，通过模拟抵消模块对信号进行预处理，以使LNA不饱和、不烧毁。
在一些可行的实施方式中，射频电路还包括抵消反馈链路，如图4所示，抵消反馈链路包括第二耦合模块、第二开关选择模块、反馈射频处理模块、模数转换模块和数字处理模块。第二耦合模块被设置为在发射链路(发射放大模块的发射端)对模拟发射信号进行采样，并将不同发送链路中采样得到样本信号耦合发送至第二开关选择模块，第二开关选择模块对耦合的样本信号进行选择后传递至反馈射频处理模块进行射频放大处理，反馈射频处理模块将每条发射链路对应的经过处理的样本信号传递至模数转换模块进行模数转换，将转换后的数字样本信号传递至数字处理模块进行数字处理，数字处理的结果用于接收链路抵消TDD同频发射信号的干扰。
图7是本申请一实施例提供的射频信号处理方法的流程图，应用于上述任一实施例的射频电路。如图7所示，本实施例方案的射频信号处理方法至少包括但不限于步骤S2100、S2200、 S2300、S2400、S2500、S2600。
步骤S2100：获取至少两组基带IQ信号，其中，基带IQ信号的频段和/或频段制式不同。
步骤S2200：根据反馈IQ信号对基带IQ信号进行校准补偿处理，得到校准信号，其中，反馈IQ信号通过反馈链路采集得到。
步骤S2300：对至少两组校准信号进行合路处理，得到合路信号。
步骤S2400：对合路信号进行数模转换处理，得到模拟组合信号。
步骤S2500：对模拟组合信号进行射频放大处理及分路处理，得到至少两组模拟发射信号，其中，模拟发射信号与基带IQ信号一一对应。
步骤S2600：将至少两组模拟发射信号进行滤波处理得到发射信号。
以对两个band的信号进行处理为例，如band1和band2。如图3所示，接收BBU发送的band1的基带IQ信号和band2发送的基带IQ信号，根据band1对应的反馈IQ信号对band1的基带IQ信号进行校准补偿处理，得到band1的校准信号，根据band2对应的反馈IQ信号对band2的基带IQ信号进行校准补偿处理，得到band2的校准信号；其中，band1对应的反馈IQ信号通过反馈链路对band1的模拟发射信号和发射信号进行采样处理后得到，band2对应的反馈IQ信号通过反馈链路对band2的模拟发射信号和发射信号进行采样处理后得到。对band1的校准信号和band2的校准信号进行合路处理，得到合路信号(band1+band2)，对合路信号进行数模转换处理，将合路信号从数字信号转换为模拟信号，得到模拟组合信号(band1+band2)。对模拟组合信号进行射频放大处理和分路处理，得到band1的模拟发射信号和band2的模拟发射信号。对band1的模拟发射信号进行滤波处理，得到band1的发射信号，对band2的模拟发射信号进行滤波处理，得到band2的发射信号。最后通过天线将band1的发射信号和band2的发射信号进行发射。
可以理解的是，本申请的射频信号处理方法，还可以对三个及以上不同band的信号进行处理，在此不做具体限定。
可以理解的是，本申请实施例的射频信号处理方法即可以对一组信号进行处理，也可以对多组信号进行处理，其中，一组信号包括至少两个不同band的信号。
本申请实施例的射频信号处理方法，通过对不同band的信号进行合路后对合路信号进行处理，实现多个信号共用数字和模拟转换单元、射频处理单元和天线单元，减少了射频电路器件数量，降低了射频电路的体积和功耗，从而降低了多频段基站收发机的体积和功耗。
在一些可行的实施方式中，在步骤S2200之前，本射频信号处理方法还至少包括但不限于以下步骤：根据发射信号获取发射IQ数据；根据模拟发射信号采样得到反馈数据；根据发射IQ数据和反馈数据确认反馈IQ信号。
通过采集反馈IQ信号，对对应band的信号进行校准和补偿，降低多个band信号共用射频通道引起的失真和干扰带来的影响。
在一些可行的实施方式中，步骤S2300至少包括但不限于以下步骤：分别对至少两组校准信号进行频率搬移处理；将频率搬移处理后的校准信号进行合路，得到合路信号。以对两个band的信号进行处理为例，如band1和band2，如图6所示，分别对band1的校准信号和band2的校准信号进行频率搬移处理，将处理后的band1的校准信号和处理后的band2的校准信号进行合路，得到合路信号(band1+band2)。
在一些可行的实施方式中，如图8所示，图8是本申请另一实施例提供的射频信号处理方法的流程图，应用于上述任一实施例的射频电路。如图8所示，本实施例方案的射频信号处理方法至少包括但不限于步骤S3100、S3200、S3300、S3400、S3500、S3600。
步骤S3100：获取天线单元接收的原始信号；
步骤S3200：对原始信号进行滤波处理，得到至少两组接收信号，其中，接收信号的频段和/或频段制式不同；
步骤S3300：对接收信号进行低噪声放大处理，得到放大接收信号；
步骤S3400：将放大接收信号进行合路处理，得到组合接收信号；
步骤S3500：对组合接收信号进行模数转换处理，得到数字组合信号；
步骤S3600：对数字组合信号进行分路处理，得到至少两组接收IQ信号，其中，接收IQ信号与接收信号一一对应。
以对两个band的信号进行处理为例，如band1和band2。如图3所示，通过天线接收终端发送的原始信号，对原始信号进行滤波处理，得到band1的接收信号和band2的接收信号；对band1的接收信号和band2的接收信号进行低噪声放大处理，得到band1的放大接收信号和band2的放大接收信号；将band1的放大接收信号和band2的放大接收信号进行合路，得到组合接收信号(band1+band2)；对组合接收信号进行模数转换，将其从模拟信号转换为数字信号，得到数字组合信号；对数字组合信号在数字域进行数字处理和分路处理，得到band1的接收IQ信号和band2的接收IQ信号；最后将band1的接收IQ信号和band2的接收IQ信号发送给BBU。
本申请实施例的射频信号处理方法，通过对不同band的信号进行合路后对合路信号进行处理，实现多个信号共用数字和模拟转换单元、天线单元，减少了射频电路器件数量，降低了射频电路的体积和功耗，从而降低了多频段基站收发机的体积和功耗。
在一些可行的实施方式中，步骤S3600至少包括但不限于以下步骤：对数字组合信号进行分路处理，得到至少两组数字接收信号；对至少两组数字接收信号分别进行频率搬移处理，得到至少接收IQ信号，其中，接收IQ信号与数字接收信号一一对应。以对两个band的信号进行处理为例，如band1和band2，如图6所示，对band1和band2合路的数字组合信号进行分路处理，得到band1的数字接收信号和band2的数字接收信号；对band1的数字接收信号进行频率搬移处理，得到band1的接收IQ信号，对band2的数字接收信号进行频率搬移处理，得band2的接收IQ信号。
通过对band1的数字接收信号和band2的数字接收信号进行频率搬移处理，实现关注频段的信号的针对性传递，降低接口开销。
在一些可行的实施方式中，在接收信号的频段制式不同的情况下，步骤S3300至少包括但不限于以下步骤：对接收信号进行模拟抵消处理；将处理后的接收信号共用一个低噪声放大器进行低噪声放大处理，得到放大接收信号，其中，放大接收信号与接收信号一一对应。
通过不同band的接收信号经过模拟抵消处理后，共用一个LNA进行放大处理，减少接收链路的器件数量，减小射频电路体积，降低功耗。
在一些可行的实施方式中，在接收信号的频段制式不同的情况下，步骤S3300至少包括但不限于以下步骤：对不同频段制式的接收信号进行分隔得到FDD接收信号和TDD接收信号；对FDD接收信号和TDD接收信号分别采用不同的低噪声放大器进行低噪声放大处理，分别得到对应的放大接收信号。通过对FDD和TDD的接收信号进行分隔，分别进行处理，即FDD制式的band信号和TDD制式的band信号分别进行放大，实现不同制式，不同频段的多个射频信号合并处理。
可以理解地是，本申请的射频信号处理方法与本申请的射频电路相对应，本申请的射频 信号处理方法各实施例的具体实现细节均可与本申请的射频电路的各器件对信号的处理流程对应，不再过多进行重复赘述。
为阐述本申请实施例提供的射频信号处理方法及对应的射频电路，下面结合示例进行阐述。
图5是本申请一实施例提供的三band合路的射频电路的示意图。如图5所示，本实施例的射频电路被设置为对band1、band2及band3的信号进行收发处理。一个通道处理三个band，band1为1.8GHz FDD，band2为2.1GHz FDD，band3为3.5G TDD。
对于发射链路，数字处理单元包括三个第一NCO和一个合路器，数字和模拟转换单元包括一个数模转换模块，射频处理单元包括一个驱动方法模块和一个功率放大模块，频率选择单元包括一组滤波器，天线单元包括一组天线模块。
对于接收链路，数字处理单元还包括三个第二NCO和一个分路器，数字和模拟转换单元还包括一个模数转换模块，射频处理单元还包括第一LNA、第二LNA和一个第一开关选择模块，第一开关选择模块与第二LNA相连，频率选择单元包括一组滤波器，天线单元包括一组天线模块。其中，发射链路和接收链路共用一组滤波器和一组天线模块。
对于反馈链路，数字处理单元还包括一个可切换NCO，可切换NCO能够进行NCO1、NCO2、NCO3的切换，其中NCO1与band1对应，NCO2与band2对应，NCO3与band3对应；数字和模拟转换单元还包括模数转换模块，射频处理单元还包括第二开关选择模块。
发射过程如下：数字处理单元采用三NCO方式将三个band的基带IQ信号在数字域合路，合路后的三个band的合路信号进入数模转换器(Digital Analog Converter，DAC)进行数模转换，可以采用射频采样DAC直接得到三band的模拟组合信号，三个band的模拟组合信号经过驱动放大和功率放大后，三个band各自的模拟发射信号分别经各频段滤波器后由天线发射。
接收过程如下：通过天线接收到原始信号后经由滤波器滤波区分得到三个band各自的接收信号，band1和band2都是FDD信号共用第一LNA，得到band1和band2的放大接收信号；band3经过环形器和第一开关选择模块后进入第二LNA，得到band3的放大接收信号，三个band进行合路后进入模数转换器(Analog-to-Digital Converter，ADC)完成数字信号转换，在数字域进行三个band各自的NCO搬移，降低数字处理速率，得到三个band各自的接收IQ信号并传递给BBU。
反馈信号经第二开关选择模块后经模数转换ADC进入数字处理，可以通过数字处理部分的NCO1/2/3切换来区分不同的band。
图6是本申请一实施例提供的双band合路的射频电路的示意图。如图6所示，本实施例的射频电路被设置为对band1、band2和/或band3、band4的信号进行收发处理。一个通道处理两个band，band1为1.8GHz FDD，band2为2.6GHz TDD，band3为2.3G TDD，其中band1为1T1R，band2为2T2R,band3为1T1R，实际应用中通道可以加倍。
以band1和band2为例，发射过程如下：数字处理单元采用双NCO方式将两个band在数字域合路，合路后的双band的合路信号进入DAC进行模数转换，其中，可以采用射频采样DAC直接出模拟组合信号，可处理较大带宽信号；也可以应用中频DAC输出中频，然后用变频器实现频率变换，变频后的模拟组合信号进入功率放大模块，一进两出，得到band1的模拟发射信号和band2的模拟发射信号，band1的模拟发射信号经过band1发射滤波器得到band1的发射信号后从空口发出，band2的模拟发射信号经过band2滤波器得到band2的发射 信号后从天线发出。
以band1和band2为例，接收过程如下：通过天线接收到原始信号后，通过滤波器区分band1和band2，得到band1的接收信号和band2的接收信号，band1的接收信号经过band1对应的LNA，得到band1的放大接收信号，band2的接收信号经过环形器和开关后进入band2对应的LNA，得到band2的放大接收信号，两个band合路后得到组合接收信号，组合接收信号进入模数转换模块完成数字信号转换，得到数字组合信号，在数字域对数字组合信号进行分路并分别通过NCO进行频率搬移，降低数字处理速率，得到band1的接收IQ信号和band2的接收IQ信号，并传递给BBU。
反馈信号经开关选择后经模数转换ADC进入数字处理，可以通过数字处理单元中的NCO1/2/3/4切换来区分不同band。
图9是本申请一实施例提供的一种电子设备结构示意图。如图9所示，该设备包括存储器1100、处理器1200、通信装置1300。存储器1100、处理器1200的数量可以是一个或多个，图9中以一个存储器1100和一个处理器1200为例；设备中的存储器1100和处理器1200可以通过总线或其他方式连接，图9中以通过总线连接为例。
存储器1100作为一种计算机可读存储介质，可用于存储软件程序、计算机可执行程序以及模块，如本申请任一实施例提供的射频信号处理方法对应的程序指令/模块。处理器1200通过运行存储在存储器1110中的软件程序、指令以及模块实现上述射频信号处理方法。
存储器1100可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序。此外，存储器1100可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件或其他非易失性固态存储器件。在一些实例中，存储器1100可包括相对于处理器1200远程设置的存储器，这些远程存储器可以通过网络连接至设备。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
通信装置1300设置为根据处理器1200的控制进行信息收发通信。
在一实施例中，通信装置1300包括接收器1310、发送器1320。接收器1310为电子设备中进行数据接收的模块或器件组合。发送器1320为电子设备中进行数据发送的模块或器件组合。
本申请一实施例还提供了一种计算机可读存储介质，存储有计算机可执行指令，该计算机可执行指令用于执行如本申请任一实施例提供的射频信号处理方法。
本申请一实施例还提供了一种计算机程序产品，包括计算机程序或计算机指令，该计算机程序或计算机指令存储在计算机可读存储介质中，计算机设备的处理器从计算机可读存储介质读取计算机程序或计算机指令，处理器执行计算机程序或计算机指令，使得计算机设备执行如本申请任一实施例提供的射频信号处理方法。
本申请实施例方案，通过在数字域对TDD信号和FDD信号进行合路，对合路后的信号进行处理，不同频段制式的信号共用数字和模拟转换单元、射频处理单元、频率选择单元和天线单元，减少了器件数量，降低了射频电路的体积和功耗。
本申请实施例描述的系统架构以及应用场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域技术人员可知，随着系统架构的演变和新应用场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统、设备中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。
在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程或执行线程中，部件可位于一个计算机上或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自于自与本地系统、分布式系统或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地或远程进程来通信。
以上参照附图说明了本申请的一些实施例，并非因此局限本申请的权利范围。本领域技术人员不脱离本申请的范围和实质内所作的任何修改、等同替换和改进，均应在本申请的权利范围之内。

Claims (21)

  1. 一种射频信号处理方法，包括：
    获取至少两组基带IQ信号，其中，至少一组所述基带IQ信号为时分双工TDD信号，至少一组所述基带IQ信号为频分双工FDD信号；
    根据反馈IQ信号对所述基带IQ信号进行校准补偿处理，得到校准信号，其中，所述反馈IQ信号通过反馈链路采集得到；
    对至少两组所述校准信号进行移频合路处理，得到合路信号。
  2. 根据权利要求1所述的方法，还包括：
    对所述合路信号进行数模转换处理，得到模拟组合信号；
    对所述模拟组合信号进行射频放大处理及分路处理，得到至少两组模拟发射信号，其中，所述模拟发射信号与所述基带IQ信号对应；
    将至少两组所述模拟发射信号进行滤波处理得到发射信号。
  3. 根据权利要求2所述的方法，其中，在所述根据反馈IQ信号对所述基带IQ信号进行校准补偿处理，得到校准信号之前，所述方法包括：
    根据所述发射信号获取发射IQ数据；
    根据所述模拟发射信号采样得到反馈数据；
    根据所述发射IQ数据和所述反馈数据确认所述反馈IQ信号。
  4. 根据权利要求1所述的方法，其中，所述对至少两组所述校准信号进行移频合路处理，得到合路信号包括：
    分别对至少两组所述校准信号进行频率搬移处理；
    将频率搬移处理后的所述校准信号进行合路，得到所述合路信号。
  5. 根据权利要求1所述的方法，还包括：
    获取天线单元接收的原始信号；
    对所述原始信号进行滤波处理，得到至少两组接收信号，其中，所述接收信号的频段和/或频段制式不同；
    对所述接收信号进行低噪声放大处理，得到放大接收信号；
    将所述放大接收信号进行合路处理，得到组合接收信号；
    对所述组合接收信号进行模数转换处理，得到数字组合信号；
    对所述数字组合信号进行分路处理，得到至少两组接收IQ信号，其中，所述接收IQ信号与所述接收信号一一对应。
  6. 根据权利要求5所述的方法，其中，所述对所述数字组合信号进行分路处理，得到至少两组接收IQ信号包括：
    对所述数字组合信号进行分路处理，得到至少两组数字接收信号；
    对至少两组所述数字接收信号分别进行频率搬移处理，得到至少两组所述接收IQ信号，其中，所述接收IQ信号与所述数字接收信号一一对应。
  7. 根据权利要求5所述的方法，其中，在所述接收信号的频段制式不同的情况下，所述对所述接收信号进行低噪声放大处理，得到放大接收信号包括：
    对所述接收信号进行模拟抵消处理；
    将处理后的所述接收信号共用一个低噪声放大器进行低噪声放大处理，得到所述放大接收信号，其中，所述放大接收信号与所述接收信号一一对应。
  8. 根据权利要求5所述的方法，其中，在所述接收信号的频段制式不同的情况下，所述对所述接收信号进行低噪声放大处理，得到放大接收信号包括：
    对不同频段制式的所述接收信号进行分隔得到FDD接收信号和TDD接收信号；
    对所述FDD接收信号和所述TDD接收信号分别采用不同的低噪声放大器进行低噪声放大处理，分别得到对应的所述放大接收信号。
  9. 一种射频电路，包括：
    数字处理单元，被设置为根据反馈IQ信号对获取的至少两组基带IQ信号进行校准补偿处理，得到对应的校准信号；所述数字处理单元还被设置为对至少两组校准信号进行移频合路处理，得到合路信号；其中，至少一组所述基带IQ信号为时分双工TDD信号，至少一组所述基带IQ信号为频分双工FDD信号；
    反馈链路，被设置为对模拟发射信号进行采样，得到所述反馈IQ信号。
  10. 根据权利要求9所述的射频电路，还包括：
    数字和模拟转换单元，被设置为对所述合路信号进行数模转换处理，得到模拟组合信号；
    射频处理单元，被设置为对所述模拟组合信号进行射频放大处理和分路处理，得到至少两组模拟发射信号，其中，所述模拟发射信号与所述基带IQ信号对应；
    频率选择单元，被设置为将至少两组模拟发射信号进行滤波处理得到发射信号；
    天线单元，被设置为发射所述发射信号。
  11. 根据权利要求9所述的射频电路，其中，所述数字处理单元包括至少两个第一数字振荡器和至少一个合路器；所述第一数字振荡器被设置为对所述校准信号进行频率搬移处理，所述合路器被设置为对至少两组处理后的校准信号进行合路处理，得到所述合路信号。
  12. 根据权利要求9所述的射频电路，其中，所述数字处理单元包括至少两个第二数字振荡器和至少一个分路器；所述分路器被设置为对数字组合信号进行分路处理，得到至少两组数字接收信号；所述第二数字振荡器被设置为对所述数字接收信号进行频率搬移处理，得到接收IQ信号，其中，所述第二数字振荡器与所述数字接收信号一一对应。
  13. 根据权利要求10所述的射频电路，其中，所述射频处理单元包括至少一个变频器和至少一个功率放大模块；所述变频器被设置为对所述模拟组合信号进行变频处理，所述功率放大模块被设置为对变频处理后的所述模拟组合信号进行放大处理和分路处理，得到至少两组所述模拟发射信号。
  14. 根据权利要求10所述的射频电路，其中，所述射频处理单元包括至少一个驱动放大模块和至少一个功率放大模块；所述驱动放大模块被设置为对所述模拟组合信号进行第一次放大处理，所述功率放大模块被设置为对第一次放大处理后的所述模拟组合信号进行第二次放大处理和分路处理，得到至少两组所述模拟发射信号。
  15. 根据权利要求10所述的射频电路，其中，所述射频处理单元包括至少一个低噪声放大器，所述低噪声放大器被设置为对至少两组接收信号进行放大处理，其中，所述接收信号的频段制式相同。
  16. 根据权利要求10所述的射频电路，其中，所述射频处理单包括第一低噪声放大器、第二低噪声放大器和开关选择模块，其中，所述开关选择模块与所述第二低噪声放大器连接； 所述第一低噪声放大器被设置为对FDD频段的接收信号进行放大处理；所述第二低噪声放大器被设置为对经过所述开关选择模块的TDD频段的接收信号进行放大处理。
  17. 根据权利要求10所述的射频电路，其中，所述射频处理单元包括至少一个低噪声放大器和至少一个模拟抵消模块，所述模拟抵消模块被设置为对至少两组接收信号进行模拟抵消处理，所述低噪声放大器被设置为对模拟抵消处理后的接收信号进行放大处理；其中，所述接收信号的频段制式不同。
  18. 一种通信装置，包括如权利要求9至17任一项所述的射频电路。
  19. 一种电子设备，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如权利要求1至8任一项所述的射频信号处理方法。
  20. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行所述计算机程序时实现如权利要求1至8任一项所述的射频信号处理方法。
  21. 一种计算机程序产品，包括计算机程序或计算机指令，所述计算机程序或所述计算机指令存储在计算机可读存储介质中，计算机设备的处理器从所述计算机可读存储介质读取所述计算机程序或所述计算机指令，所述处理器执行所述计算机程序或所述计算机指令，使得所述计算机设备执行如权利要求1至8任一项所述的射频信号处理方法。
PCT/CN2023/129651 2022-11-17 2023-11-03 射频信号处理方法、电路、通信装置、设备及存储介质 WO2024104198A1 (zh)

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