WO2019042123A1 - Procédé de traitement de signaux, dispositif de réseau, terminal et support de stockage lisible par ordinateur - Google Patents

Procédé de traitement de signaux, dispositif de réseau, terminal et support de stockage lisible par ordinateur Download PDF

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Publication number
WO2019042123A1
WO2019042123A1 PCT/CN2018/100434 CN2018100434W WO2019042123A1 WO 2019042123 A1 WO2019042123 A1 WO 2019042123A1 CN 2018100434 W CN2018100434 W CN 2018100434W WO 2019042123 A1 WO2019042123 A1 WO 2019042123A1
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Prior art keywords
signal
link
digital
frequency domain
transmit
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PCT/CN2018/100434
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English (en)
Chinese (zh)
Inventor
秦飞
刘昊
孙鹏
吴凯
姜大洁
冯三军
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维沃移动通信有限公司
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Publication of WO2019042123A1 publication Critical patent/WO2019042123A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • 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
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • 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
    • 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
    • H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a signal processing method, a network device, a terminal, and a computer readable storage medium.
  • the nonlinear device on the radio frequency link will generate harmonic and intermodulation interference to the receiver, and we collectively refer to the pair generated when the transmitter transmits the signal.
  • the interference of the signal itself is nonlinear self-interference.
  • FIG. 1 a schematic diagram of a transceiver structure of a wireless mobile communication device, wherein, in a transmit link, a baseband signal sent by a baseband signal processor is sequentially subjected to digital-to-analog conversion, up-conversion, power amplification, and filtering, and then Transmitted through the duplex antenna; in the receiving link, the duplex antenna receives the RF signal and then sequentially filters, low-noise, down-convert, and analog-to-digital converts to generate a baseband signal to be processed, and then processes and parses the signal through the baseband signal processor.
  • a useful signal is Among them, analog devices such as Power Amplifier (PA) and Low Noise Amplifier (LNA) generate nonlinear signals.
  • PA Power Amplifier
  • LNA Low Noise Amplifier
  • x is the input signal
  • y is the output nonlinear signal
  • ⁇ i is the intensity coefficient of each nonlinear signal caused by the device characteristics
  • x i is the higher order component of the nonlinear signal.
  • i ⁇ t is a high-order harmonic interference signal.
  • each order intermodulation signal can be obtained.
  • the following potential interference exists: second harmonic interference, non-linearity generated by the F1 power amplifier
  • the 2nd harmonic will leak into the F2 receiving link through the transmission line and/or PCB, generating 2th harmonic interference; intermodulation interference, two different frequency transmission signals F1 and F2 will generate second order intersection on the F1 receiver. Adjust the interference.
  • Radio frequency interference isolation that is, adding a filter, increasing PCB wiring isolation, using a microwave transmission line, etc., so that the interference signal generated by the transmission link is as small as possible. Entering the receiving link, but the filter filtering capability is high, and will bring additional insertion loss, high cost and poor interference suppression capability.
  • Radio frequency interference cancellation that is, the interference signal generated by the transmitting link is adjusted for a specific phase amplitude, and a radio frequency analog signal with a relatively equal amplitude and opposite phase is generated to cancel the interference signal, but the interference signal is difficult to be extracted with the useful signal.
  • the complexity of generating the cancellation signal is high and the interference suppression capability is poor.
  • the third method is to prevent the transmitting link and the receiving link from working at the same time, that is, the coordinated scheduling of the network device, so that the transmitting link and the receiving link are time-division multiplexed, or the two transmitting links that generate the intermodulation interference do not work at the same time, but This method not only reduces the overall transmission speed of the signal, but also is not conducive to the full utilization of system resources.
  • an embodiment of the present disclosure provides a signal processing method, which is applied to a transceiver node, where the transceiver node includes: at least one transmit link and at least one receive link, and the working frequency of the transmit link and the receive link are different.
  • the signal processing method includes:
  • the embodiment of the present disclosure further provides a transceiver node, where the transceiver node includes: at least one transmit link and at least one receive link, where the transmit link and the receive link have different operating frequencies; the transceiver node further includes:
  • An acquiring module configured to acquire a digital transmission signal sent by the transmitting link and a digital receiving signal received by the receiving link
  • a building module configured to construct a nonlinear interference signal of the transmitting link to the receiving link according to the digital transmitting signal and the digital receiving signal;
  • a filtering module is used to filter out non-linear interference signals in the receiving link.
  • an embodiment of the present disclosure provides a network device, including a processor, a memory, and a computer program stored on the memory and operable on the processor, where the processor implements the foregoing signal processing when executing the computer program The steps of the method.
  • an embodiment of the present disclosure provides a terminal, including a processor, a memory, and a computer program stored on the memory and operable on the processor, where the computer program is executed by the processor to implement the foregoing signal processing method .
  • an embodiment of the present disclosure provides a computer readable storage medium, where the computer readable storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the signal processing method are implemented.
  • FIG. 1 is a schematic structural diagram of a transceiver of a wireless mobile communication device
  • FIG. 2 is a schematic flow chart showing a signal processing method according to an embodiment of the present disclosure
  • FIG. 3 is a block diagram showing a transceiver node of an embodiment of the present disclosure
  • FIG. 4 is a block diagram of a network device of an embodiment of the present disclosure.
  • Figure 5 is a block diagram showing a terminal of an embodiment of the present disclosure.
  • FIG. 6 is a structural block diagram of a transceiver node for filtering second harmonic interference according to an embodiment of the present disclosure
  • FIG. 7 is a structural block diagram of a transceiver node for filtering intermodulation interference according to an embodiment of the present disclosure.
  • the signal processing method of the embodiment of the present disclosure is applied to a transceiver node, where the transceiver node includes at least one transmit link and at least one receive link, where the transmit link and the receive link have different operating frequencies.
  • the signal processing method includes the following steps 21 to 23.
  • Step 21 Obtain a digital transmission signal sent by the transmission link and a digital reception signal received by the receiving link.
  • the transmit link and the receive link belong to a transceiver node, the digital transmit signal sent by the transmit link and the digital receive signal received by the receive link are completely known signals to the transceiver node. Therefore, the transceiver node can Obtaining a digital transmit signal transmitted to the transmit link and a digital receive signal received by the receive link.
  • Step 22 Construct a nonlinear interference signal of the transmitting link to the receiving link according to the digital transmitting signal and the digital receiving signal.
  • a nonlinear interference signal of the transmission link of the transceiver node to the reception link can be constructed.
  • Step 23 Filter out the nonlinear interference signal in the receiving link.
  • the non-linear interference signal generated by the transmission link has been constructed in step 22, in order to prevent the part of the non-linear interference signal from entering the receiving link and adversely affecting its own reception, after the receiving link receives the digital receiving signal, the part is not
  • the linear interference signal is filtered to improve the multi-frequency performance of the transceiver node.
  • the method further includes: acquiring the useful signal and the self-interference signal in the digital received signal; if the ratio of the signal strength of the useful signal in the digital received signal to the signal strength of the self-interference signal is greater than or equal to The first threshold, the step of constructing and filtering the non-linear interference signal is not performed, that is, the self-interference signal is ignored, and steps 22 and 23 are not performed. Specifically, if the ratio of the signal strength of the useful signal in the digital received signal to the signal strength of the self-interference signal is greater than or equal to the first threshold, the self-interference signal is ignored. That is, when the useful signal is much larger than the self-interference signal strength, the self-interference signal has little influence on the reception performance of the useful signal, and the self-interference signal can be ignored.
  • the useful signal in the digital received signal received by the receiving link is acquired; when the receiving link only receives the transmitted signal of the transmitting link, acquiring the received signal received by the receiving link Self-interference signal in digital receive signals.
  • the strength of the useful signal s(t) may be measured by a Reference Signal Receiving Power (RSRP) when the transmitting link does not transmit a signal, and the strength of the self-interference signal i(t) of the terminal may belong to The idle time slot in which the cell and the neighboring cell do not transmit the downlink signal is measured, and specifically, the time slot in which the Received Signal Strength Indication (RSSI) is selected to be close to N0 is measured.
  • RSRP Reference Signal Receiving Power
  • Step 22 is specifically implemented by: estimating a channel response of the self-interference signal generated by the transmitting link in the receiving link according to the digital sending signal and the digital receiving signal; and constructing a non-transmitting link to the receiving link according to the channel response Linear interference signal.
  • the actual self-interference signal generated by the transmitting link is unknown, according to the known digital transmitting signal and the digital receiving signal, the channel response of the self-interference signal in the receiving link can be estimated, according to which the channel response can be constructed.
  • the equivalent nonlinear interference signal considers the equivalent nonlinear interference signal as the self-interference signal generated by the transmission link, and filters out the received digital received signal to avoid self-interference signal to its own receiving chain. The adverse effects caused by the road.
  • the step of estimating the channel response of the self-interference signal generated by the transmitting link in the receiving link according to the digital transmitting signal and the digital receiving signal specifically includes: estimating the self-interference generated by the transmitting link according to the digital transmitting signal and the digital receiving signal.
  • the estimation algorithm is different.
  • Scenario 1 Perform channel response estimation when the receiving link does not have a scheduled idle time slot.
  • the self-interference signal generated by the transmitting link is a second harmonic signal
  • the receiving link only receives the signal transmitted by the transmitting link
  • the frequency domain transform of the digital receiving signal and the digital transmitting signal are The frequency domain transform of the nonlinear component is divided to estimate the frequency domain channel response of the self-interference signal; the specific formula is as follows:
  • a frequency domain transform representing a response component of a nonlinear component of a digital transmission signal in the receive chain Y( ⁇ ) representing a frequency domain transform of the digital received signal
  • HNL( ⁇ ) representing a frequency domain transform of a nonlinear component of the digital transmit signal
  • Scenario 2 The channel response is estimated when there is scheduling on the receiving link and there is an expected received signal.
  • the self-interference signal is ignored. That is, when the useful signal is much larger than the self-interference signal strength, the self-interference signal has little effect on the reception performance of the useful signal, and the self-interference signal can be ignored.
  • the useful signal in the digital receiving signal received by the receiving link is acquired; when the receiving link only receives the transmitted signal of the transmitting link, the number received by the receiving link is acquired.
  • a self-interference signal in the received signal may be measured by a Reference Signal Receiving Power (RSRP) when the transmitting link does not transmit a signal, and the strength of the self-interference signal i(t) of the terminal may belong to The idle time slot in which the cell and the neighboring cell do not transmit the downlink signal is measured, and specifically, the time slot in which the Received Signal Strength Indication (RSSI) is selected to be close to N0 is measured.
  • RSRP Reference Signal Receiving Power
  • the channel estimation can be performed by using the scenario one.
  • a frequency domain transform representing a response component of a nonlinear component of a digital transmission signal in the receive chain Y( ⁇ ) representing a frequency domain transform of the digital received signal
  • HNL( ⁇ ) representing a frequency domain transform of a nonlinear component of the digital transmit signal
  • the channel response of the self-interfering signal is jointly estimated by N subcarriers.
  • a frequency domain transform representing a response component of a nonlinear component of the digital transmission signal on the first to N subcarriers in the receive chain
  • Y( ⁇ n ) representing a frequency domain of the digital received signal on the subcarrier n Transform
  • HNL( ⁇ ) represents the frequency domain transform of the nonlinear component of the digital transmit signal on subcarrier n.
  • the signal strength of the wanted signal and the self-interference signal, and the channel estimation of the interference signal may have large errors.
  • channel estimation may be performed through multiple subcarrier joint modes.
  • N is proportional to the ratio of signal strength, that is, when the useful signal is equivalent to the self-interference signal, the larger the ratio of the signal strength of the useful signal to the signal strength of the self-interference signal, the useful signal
  • nonlinear component in the above digital transmission signal may be a second harmonic or other higher harmonic signal, and may also be a multi-frequency intermodulation signal.
  • the following embodiment further describes the signal processing method in combination with a specific application scenario.
  • the self-interference signal generated by the transmitting link is a second harmonic signal
  • the digital transmitting signal transmitted by the transmitting link is:
  • the signal after up-conversion is:
  • the second harmonic signal generated is The response function of the leakage through the PCB leakage or conduction to the receiving link is h(t), and the frequency domain response is H( ⁇ ).
  • the second harmonic interference signal received by the receiving link is After down-conversion, the received second harmonic interference signal is Further, the digital received signal y(t) received by the receiving link includes a useful signal s(t), a self-interference signal i(t), and a noise signal n(t). specifically,
  • the frequency domain channel of the self-interference signal is estimated by the following formula. response;
  • a frequency domain transform representing a response function of the second harmonic signal in the receiving link Y( ⁇ ) represents a frequency domain transform of the digital received signal, and HM( ⁇ ) represents a frequency domain transform of the second harmonic signal.
  • the digital receive signal is
  • hm(t) represents the squared signal of the digital transmitted signal
  • x(t) represents the digital transmitted signal
  • HM( ⁇ ) represents the frequency domain transform of the squared signal
  • X( ⁇ ) represents the frequency domain transform of the digital transmitted signal
  • the self-interference signal generated by the transmitting link is a second harmonic signal
  • the ratio of the signal strength of the useful signal in the digital received signal to the signal strength of the self-interference signal is greater than or equal to the first threshold
  • the self-interference signal is ignored. That is, when s(t) is much larger than the signal strength of i(t), the self-interference signal has little effect on the reception performance of the useful signal, and the self-interference signal can be ignored.
  • the strength of the useful signal s(t) may be obtained by performing RSRP measurement when the transmitting link does not transmit a signal, and the strength of the self-interference signal i(t) of the terminal may be idle when the downlink cell and the neighboring cell do not transmit the downlink signal.
  • the gap is measured, and specifically, the time slot in which the received RSSI is selected close to N0 is measured.
  • the frequency domain channel response of the self-interference signal is estimated in the time slot in which the receiving link is scheduled. among them, Representing the frequency domain transform of the response function of the second harmonic signal in the receive chain, Y( ⁇ ) represents the frequency domain transform of the digital received signal, and HM( ⁇ ) represents the frequency domain transform of the squared signal of the digital transmitted signal.
  • the useful signal is much smaller than the self-interference signal, and the channel estimation of the interference signal is relatively accurate.
  • the channel estimation can be performed by using the scenario one.
  • the channel response of the self-interference signal is jointly estimated by the N subcarriers in the time slot in which the receiving link is scheduled.
  • a frequency domain transform representing a response signal of a squared signal of a digital transmission signal on N subcarriers in a receiving chain Y( ⁇ n ) representing a frequency domain transform of a digital received signal on subcarrier n
  • HM( ⁇ ) representing a subcarrier Frequency domain transform of the squared signal over n.
  • the signal strength of the wanted signal and the self-interference signal, and the channel estimation of the interference signal may have large errors.
  • channel estimation may be performed through multiple subcarrier joint modes.
  • the step of constructing a non-linear interference signal of the transmit link to the receive link according to the channel response comprises: constructing a nonlinear interference signal of the transmit link to the receive link according to the channel response and the squared signal of the digital transmit signal.
  • the channel response includes a time domain response and a frequency domain response, so corresponding non-linear interference signals in the time domain and nonlinear interference signals in the frequency domain can be constructed.
  • the non-linear interference signal of the transmit link to the receive link in the frequency domain is constructed according to the frequency domain channel response and the frequency domain transform of the squared signal of the digital transmit signal; and/or, according to the time domain channel response and the digital transmit signal
  • the squared signal constructs a nonlinear interference signal from the transmit link to the receive link in the time domain.
  • the step of constructing a non-linear interference signal of the transmit link to the receive link in the frequency domain can be implemented by:
  • a frequency domain transform representing the response function of the squared signal in the receive chain
  • X( ⁇ ) representing the frequency domain transform of the digital transmit signal
  • a radio frequency signal is transmitted through the antenna, and when the receiving link is received, the radio frequency signal is converted to generate a digital receiving signal, and according to the number of the transmitting link.
  • the signal is transmitted and the received digital received signal is subjected to self-interference signal channel estimation, the self-interference signal is reconstructed, and the self-interference signal is deleted in the digital received signal.
  • the channel response estimation of the second harmonic signal is introduced above.
  • the construction of the nonlinear interference signal will be further described below.
  • the step of constructing a non-linear interference signal of the transmitting link to the receiving link in the time domain can be implemented in the following manner:
  • the transform obtains the time domain channel response; Constructs a nonlinear interference signal from the transmit link to the receive link on the time domain. among them, Representing a nonlinear interference signal in the time domain, A time domain transform representing the response function of the squared signal in the receive chain, x(t) representing the digital transmit signal.
  • the self-interference signal is the second harmonic signal
  • the scenario of intermodulation signal interference is further introduced.
  • the nonlinear component in the digital transmission signal is an intermodulation signal.
  • the self-interference signal generated by the transmitting link is an intermodulation signal
  • the first digital transmission signal sent by the transmitting link is:
  • the signal after up-conversion is:
  • the second digital transmit signal sent by the transmit link is:
  • the signal after up-conversion is: Generated intermodulation signal
  • the response function of the leakage through the PCB leakage or conduction to the receiving link is h(t)
  • the frequency domain response is H( ⁇ )
  • the intermodulation interference signal received by the receiving link is
  • the second harmonic interference signal received after down-conversion is Further, the digital received signal y(t) received by the receiving link includes a useful signal s(t), a self-interference signal i(t), and a noise signal n(t). specifically,
  • the idle time slot estimation of the unscheduled receiving link is determined by the following formula. Frequency domain channel response of the self-interference signal;
  • Y( ⁇ ) represents the frequency domain transformation of the digital received signal
  • HI( ⁇ ) represents the first digital transmission signal and the second digital transmission signal transmitted by the transmission link.
  • the frequency domain transform of the product signal Denoting the frequency domain transformation of the response signal of the intermodulation signal in the receiving link, Y( ⁇ ) represents the frequency domain transformation of the digital received signal, and HI( ⁇ ) represents the first digital transmission signal and the second digital transmission signal transmitted by the transmission link.
  • the digital receive signal is
  • the useful signal or called the expected received signal
  • the channel response estimation is more accurate.
  • Sending signals based on numbers with Obtaining a product signal of the first digital transmission signal and the second digital transmission signal transmitted by the transmission link according to hi(t) x1(t) ⁇ x2(t), thereby obtaining an intermodulation signal thereof;
  • the frequency domain response of the product signal in the receive chain is determined.
  • hi(t) represents a product signal of the first digital transmission signal and the second digital transmission signal
  • x1(t) represents the first digital transmission signal transmitted by the transmission link
  • x2(t) represents the second transmission of the transmission link.
  • Digital transmission signal HI( ⁇ ) represents the frequency domain transformation of the response signal of the product signal in the receiving link
  • X1( ⁇ ) represents the frequency domain transformation of the first digital transmission signal
  • X2( ⁇ ) represents the frequency of the second digital transmission signal. Domain transformation.
  • the self-interference signal generated by the transmitting link is an intermodulation signal
  • the ratio of the signal strength of the useful signal in the digital received signal to the signal strength of the self-interference signal is greater than or equal to the first threshold, then Ignore self-interference signals. That is, when s(t) is much larger than the signal strength of i(t), the self-interference signal has little effect on the reception performance of the useful signal, and the self-interference signal can be ignored.
  • the strength of the useful signal s(t) may be obtained by performing RSRP measurement when the transmitting link does not transmit a signal, and the strength of the self-interference signal i(t) of the terminal may be idle when the downlink cell and the neighboring cell do not transmit the downlink signal.
  • the gap is measured, and specifically, the time slot in which the received RSSI is selected close to N0 is measured.
  • the frequency domain channel response of the self-interference signal is estimated in the time slot in which the receiving link is scheduled. among them, Representing the frequency domain transform of the response signal of the product signal in the receive chain, Y( ⁇ ) represents the frequency domain transform of the digital received signal, and HI( ⁇ ) represents the frequency domain transform of the product signal.
  • the useful signal is much smaller than the self-interference signal, and the channel estimation of the interference signal is relatively accurate. In this case, the channel estimation can be performed by using the scenario one.
  • the channel response of the self-interference signal is jointly estimated by the N subcarriers in the time slot in which the receiving link is scheduled.
  • a frequency domain transform representing a response signal of a first digital transmission signal and a second digital transmission signal on a first to N subcarriers in a receive chain
  • Y( ⁇ n ) representing a digital received signal on the subcarrier n
  • HI( ⁇ ) represents the frequency domain transform of the product signal on subcarrier n.
  • the signal strength of the wanted signal and the self-interference signal, and the channel estimation of the interference signal may have large errors.
  • channel estimation may be performed through multiple subcarrier joint modes.
  • the step of constructing a non-linear interference signal of the transmit link to the receive link according to the channel response comprises: constructing a nonlinear interference signal of the transmit link to the receive link according to the channel response and the product signal of the digital transmit signal.
  • the channel response includes a time domain response and a frequency domain response, so corresponding non-linear interference signals in the time domain and nonlinear interference signals in the frequency domain can be constructed.
  • the nonlinear interference signal of the transmit link to the receive link in the frequency domain is constructed according to the frequency domain channel response and the frequency domain transform of the product signal of the digital transmit signal; and/or, according to the time domain channel response and the digital transmit signal
  • the product signal constructs a nonlinear interference signal from the transmit link to the receive link in the time domain.
  • the step of constructing a non-linear interference signal of the transmit link to the receive link in the frequency domain can be implemented in the following manner:
  • Representing a nonlinear interference signal in the frequency domain Representing the frequency domain transform of the response signal of the product signal in the receive chain
  • X1( ⁇ ) represents the frequency domain transform of the first digital transmit signal
  • X2( ⁇ ) represents the frequency domain transform of the second digital transmit signal
  • the channel response estimation of the intermodulation signal is introduced above.
  • the construction of the nonlinear interference signal will be further described below.
  • the step of constructing a non-linear interference signal of the transmitting link to the receiving link in the time domain can be implemented in the following manner:
  • the transform obtains the time domain channel response; Constructs a nonlinear interference signal from the transmit link to the receive link on the time domain. among them, Representing a nonlinear interference signal in the time domain, Representing the time domain response function of the product signal on the receive link, x1(t) represents the first digital transmit signal transmitted by the transmit link, and x2(t) represents the second digital transmit signal transmitted by the transmit link.
  • the first digital transmission signal and the second digital transmission signal in the transmission link are subjected to baseband processing and frequency conversion, and then an RF signal is transmitted through the antenna.
  • the RF signal is converted to generate a digital reception. And performing signal estimation on the transmit link according to the digital transmit signal of the transmit link and the received digital receive signal, reconstructing the intermodulation signal, and deleting the reconstructed intermodulation signal in the digital received signal.
  • the self-interference signal constructed by the above method can accurately approach the actually generated self-interference signal, and can also construct a higher-order harmonic interference signal and a more frequent intermodulation interference signal by referring to the above manner.
  • step 23 is specifically implemented by:
  • nonlinear interference signals in the receive chain Representing a useful signal in a digital received signal, y(t) representing a digital received signal received on the receiving link, Indicates the non-linear interference signal of the transmit link to the receive link in the time domain, and 2T A represents the timing advance of the transmit link and the receive link.
  • the preset threshold is related to the Cyclic Prefix (CP) of the OFDM system, for example, the preset threshold is CP/2.
  • the time difference is 2us, which can basically ensure that the interference in the frequency domain can be directly deleted in the range of the CP (in the case of 4.7us of LTE), that is, the interference deletion is directly performed in the frequency domain.
  • the coverage distance exceeds 700 meters, the normal CP length of OFDM is exceeded, and the signals are not orthogonal. Therefore, time domain interference deletion is needed, that is, the interference signal is restored to the time domain, and the time difference of the transmission and reception is introduced. Interference deletion.
  • the non-linear interference signal in the frequency domain of the receiving link is filtered out. among them, a frequency domain transform representing a useful signal in a digital received signal, Y( ⁇ ) representing a frequency domain transform of a digital received signal received by the receiving link, A frequency domain transform representing a non-linear interference signal of a transmit link to a receive link.
  • MIMO Multiple-Input Multiple-Output
  • the transceiver node includes at least two transmit links and/or at least two receive links.
  • the self-interference signals may be constructed in the manners of scenario 1 and scenario 2, and the corresponding self-interference signals are deleted in each of the receiving links.
  • each transmit link pair receive link is constructed according to at least two digital transmit signals and digital receive signals sent by at least two transmit links respectively Nonlinear interference signal. And filter out all nonlinear interference signals in each receiving link separately. Wherein, all the non-linear interference signals are superposed signals of nonlinear interference signals of the respective transmission links to the receiving links.
  • one transmission link may separately interfere with two receiving links, and channel estimation and interference signal construction may be separately performed on two receiving links according to the method of the foregoing embodiment, and The constructed interference signal is deleted.
  • the interference signals generated by the two transmission links on the receiving link are different. Therefore, it is necessary to perform channel response estimation and interference signal construction based on the digital transmission signals of the two transmission links, respectively.
  • the sum of the interference signals of the two transmitting links is deleted on the receiving link. Among them, it is worth noting that when the data information sent by the two transmitting links is completely the same, an interference signal of one of the transmitting links can be constructed and deleted.
  • the signal processing method of the embodiment of the present disclosure has been described above, and it is worth noting that the above-mentioned transceiver node includes a terminal or a network device. That is, the signal processing method is applicable to all mobile communication terminal devices, base station devices, and other multi-band wireless communication systems that support transmission and reception synchronization.
  • the terminal when the transceiver node is the terminal, since not all the terminals in the system have the self-interference cancellation capability, the terminal needs to report the terminal capability information for indicating whether the non-linear interference signal filtering capability is supported to the network device.
  • the transceiver node when the transceiver node is a network device, it is required to receive terminal capability information reported by the terminal for indicating whether to support the non-linear interference signal filtering capability.
  • the transceiver node estimates the transmission transmitted by the transmitting link and receives the received link according to the digital transmission signal transmitted in the transmission link and the digital received signal received in the receiving link.
  • the nonlinear interference signal caused by the interference is further deleted in the receiving link to improve the multi-frequency performance of the transceiver node and improve the spectrum efficiency of the system.
  • the transceiver node 300 of the embodiment of the present disclosure includes at least one transmit link and at least one receive link, and the working frequency of the transmit link and the receive link are different.
  • the foregoing embodiment can be implemented. Obtaining a digital transmission signal sent by the transmission link and a digital reception signal received by the receiving link; constructing a nonlinear interference signal of the transmission link to the receiving link according to the digital transmission signal and the digital reception signal; filtering out the receiving link
  • the transceiver node 300 specifically includes the following functional modules:
  • the first obtaining module 310 is configured to acquire a digital transmit signal sent by the transmit link and a digital receive signal received by the receive link.
  • the construction module 320 is configured to construct a nonlinear interference signal of the transmit link to the receive link according to the digital transmit signal and the digital receive signal;
  • the filtering module 330 is configured to filter out nonlinear interference signals in the receiving link.
  • the transceiver node 300 further includes:
  • a second acquiring module configured to acquire a useful signal and a self-interference signal in the digital received signal
  • a processing module configured to: if the signal strength ratio of the signal strength of the useful signal in the digital received signal and the signal strength of the self-interference signal is greater than or equal to the first threshold, the step of constructing and filtering the nonlinear interference signal is not performed.
  • the second obtaining module includes:
  • a first acquiring submodule configured to acquire a useful signal in a digital received signal received by the receiving link when the transmitting link does not send a signal
  • a second acquiring submodule configured to acquire a self-interference signal in the digital received signal received by the receiving link when the receiving link only receives the signal sent by the transmitting link.
  • the building module 320 includes:
  • An estimation submodule configured to estimate a channel response of the self-interference signal generated by the transmission link in the receiving link according to the digital transmission signal and the digital reception signal;
  • the estimation submodule includes:
  • a first estimating unit configured to estimate a frequency domain channel response of the self-interference signal generated by the transmitting link in the receiving link according to the digital transmitting signal and the digital receiving signal;
  • a second estimating unit configured to estimate a time domain channel response of the self-interference signal generated by the transmitting link in the receiving link according to the digital sending signal and the digital receiving signal.
  • the first estimating unit comprises:
  • a first estimation subunit configured to divide, by the frequency domain transform of the digital received signal, by frequency domain transform of the nonlinear component of the digital transmit signal, when the receive link receives only the signal sent by the transmit link, and estimate The frequency domain channel response of the interference signal; the specific formula is as follows:
  • a frequency domain transform representing a response component of a nonlinear component of a digital transmission signal in the receive chain Y( ⁇ ) representing a frequency domain transform of the digital received signal
  • HNL( ⁇ ) representing a frequency domain transform of a nonlinear component of the digital transmit signal
  • the first estimating unit further includes:
  • a second estimation subunit configured to: if a signal strength ratio of a signal strength of the useful signal and a signal strength of the self-interference signal is less than a second threshold, Estimating the frequency domain channel response of the self-interference signal; wherein a frequency domain transform representing a response component of a nonlinear component of a digital transmission signal in the receive chain, Y( ⁇ ) representing a frequency domain transform of the digital received signal, and HNL( ⁇ ) representing a frequency domain transform of a nonlinear component of the digital transmit signal;
  • a third estimation subunit configured to: if a signal strength ratio of a signal strength of the useful signal and a signal strength of the self-interference signal is greater than or equal to a second threshold and less than the first threshold, Estimating the channel response of the self-interference signal by using N subcarriers jointly; wherein A frequency domain transform representing a response component of a nonlinear component of a digital transmitted signal on a first to N subcarriers in a receive chain, Y( ⁇ n ) representing a frequency domain transform of a digital received signal on subcarrier n, HNL( ⁇ ) A frequency domain transform representing a nonlinear component of a digital transmission signal on subcarrier n.
  • the value of N is proportional to the ratio of signal strength.
  • the estimation submodule further includes:
  • a first acquiring unit configured to acquire a useful signal in a digital received signal received by the receiving link when the transmitting link does not send a signal
  • a second acquiring unit configured to acquire a self-interference signal in the digital received signal received by the receiving link when the receiving link only receives the signal sent by the transmitting link.
  • the first estimating unit when the self-interference signal is a second harmonic signal, the first estimating unit further includes:
  • hm(t) represents the squared signal of the digital transmitted signal
  • x(t) represents the digital transmitted signal
  • HM( ⁇ ) represents the frequency domain transform of the squared signal
  • X( ⁇ ) represents the frequency domain transform of the digital transmitted signal
  • the construction sub-module includes:
  • the first building unit is configured to construct a nonlinear interference signal of the transmitting link to the receiving link according to the channel response and the squared signal of the digital transmission signal.
  • the first building unit is configured to include:
  • a first constructing subunit configured to construct a nonlinear interference signal of a transmit link to a receive link in a frequency domain according to a frequency domain channel response and a frequency domain transform of a squared signal of the digital transmit signal;
  • a second building subunit configured to construct a nonlinear interference signal of the transmitting link to the receiving link in the time domain according to the time domain channel response and the squared signal of the digital transmission signal.
  • the first building subunit is specifically used for:
  • a frequency domain transform representing the response function of the squared signal in the receive chain
  • X( ⁇ ) representing the frequency domain transform of the digital transmit signal
  • the second building subunit is specifically used for:
  • a time domain transform representing the response function of the squared signal in the receive chain
  • x(t) representing the digital transmit signal
  • the first estimating unit when the self-interference signal is an intermodulation signal, the first estimating unit further includes:
  • hi(t) represents a product signal of the first digital transmission signal and the second digital transmission signal
  • x1(t) represents the first digital transmission signal transmitted by the transmission link
  • x2(t) represents the second transmission of the transmission link.
  • Digitally transmitted signal HI( ⁇ ) represents the frequency domain transform of the response function of the intermodulation signal in the receive chain
  • X1( ⁇ ) represents the frequency domain transform of the first digital transmit signal
  • X2( ⁇ ) represents the first digital transmit signal Frequency domain transform.
  • the construction sub-module includes:
  • a second building unit configured to construct a nonlinear interference signal of the transmitting link to the receiving link according to the channel response and the product signal of the digital transmission signal.
  • the second building unit includes:
  • a third constructing subunit configured to construct a nonlinear interference signal of a transmit link to a receive link in a frequency domain according to a frequency domain channel response and a frequency domain transform of a product signal of the digital transmit signal;
  • a fourth construction subunit configured to construct a nonlinear interference signal of the transmission link to the receiving link in the time domain according to the time domain channel response and the product signal of the digital transmission signal.
  • the third building subunit is specifically used for:
  • Representing a nonlinear interference signal in the frequency domain Representing the frequency domain transform of the response signal of the product signal in the receive chain
  • X1( ⁇ ) represents the frequency domain transform of the first digital transmit signal
  • X2( ⁇ ) represents the frequency domain transform of the second digital transmit signal
  • the fourth building subunit is specifically used for:
  • Representing a nonlinear interference signal in the time domain Representing the time domain response function of the product signal on the receive link
  • x1(t) represents the first digital transmit signal transmitted by the transmit link
  • x2(t) represents the second digital transmit signal transmitted by the transmit link
  • the filtering module includes:
  • a first filtering submodule configured to filter a nonlinear interference signal in the receiving link in a time domain when a timing advance of the transmitting link and the receiving link is greater than a preset threshold
  • the second filtering submodule is configured to filter the nonlinear interference signal in the receiving link in the frequency domain when the timing advance is less than or equal to the preset threshold.
  • the first filtering sub-module includes:
  • First filtering unit for Filtering out nonlinear interference signals in the receiving link
  • Representing a useful signal in a digital received signal Representing a useful signal in a digital received signal
  • y(t) representing a digital received signal received on the receiving link
  • 2T A represents the timing advance of the transmit link and the receive link.
  • the second filtering sub-module includes:
  • a second filtering unit for Filtering out nonlinear interference signals in the frequency domain of the receiving link
  • a frequency domain transform representing a useful signal in a digital received signal Y( ⁇ ) representing a frequency domain transform of a digital received signal received by the receiving link
  • a frequency domain transform representing a non-linear interference signal of a transmit link to a receive link a frequency domain transform representing a useful signal in a digital received signal
  • Y( ⁇ ) representing a frequency domain transform of a digital received signal received by the receiving link
  • a frequency domain transform representing a non-linear interference signal of a transmit link to a receive link.
  • the building module is specifically configured to:
  • a non-linear interference signal of each transmit link to the receive link is constructed according to at least two digital transmit signals and digital receive signals transmitted by at least two transmit links, respectively.
  • the filtering module is specifically used for:
  • All non-linear interference signals in each receiving link are filtered out respectively; wherein all non-linear interference signals are superposed signals of nonlinear interference signals of respective transmitting links to the receiving links.
  • the transceiver node 300 includes a terminal or a network device.
  • the transceiver node 300 further includes: when the transceiver node 300 is a terminal, the transceiver node 300 further includes:
  • the reporting module is configured to report, to the network device, terminal capability information indicating whether the non-linear interference signal filtering capability is supported.
  • the transceiver node 300 further includes: when the transceiver node 300 is a network device, the transceiver node 300 further includes:
  • the receiving module is configured to receive terminal capability information that is reported by the terminal and is used to indicate whether the non-linear interference signal filtering capability is supported.
  • the transceiver node of the embodiment of the present disclosure estimates the transmission transmitted by the transmission link and receives on the receiving link according to the digital transmission signal transmitted in the transmission link and the digital reception signal received in the receiving link.
  • the nonlinear interference signal caused by the interference is further deleted in the receiving link to improve the multi-frequency performance of the transceiver node and improve the spectrum efficiency of the system.
  • the above transceiver nodes are not only network devices or terminals, but the division of each module is only a division of logical functions. In actual implementation, it may be integrated into one physical entity in whole or in part, or may be physically separated. . And these modules can all be implemented by software in the form of processing component calls; or all of them can be implemented in hardware form; some modules can be realized by processing component calling software, and some modules are realized by hardware.
  • the determining module may be a separately set processing element, or may be integrated in one of the above-mentioned devices, or may be stored in the memory of the above device in the form of program code, by a processing element of the above device. Call and execute the functions of the above determination module.
  • each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.
  • the above modules may be one or more integrated circuits configured to implement the above method, such as one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors ( Digital Signal Processor (DSP), or one or more Field Programmable Gate Array (FPGA).
  • ASICs Application Specific Integrated Circuits
  • DSP Digital Signal Processor
  • FPGA Field Programmable Gate Array
  • the processing component may be a general purpose processor, such as a central processing unit (CPU) or other processor that can call the program code.
  • these modules can be integrated and implemented in the form of System-On-a-Chip (SOC).
  • SOC System-On-a-Chip
  • an embodiment of the present disclosure further provides a network device, including a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor executing the computer program
  • a network device including a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor executing the computer program
  • the steps in the signal processing method as described above are implemented.
  • Embodiments of the invention also provide a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of the signal processing method described above.
  • the network device 400 includes an antenna 41, a radio frequency device 42, and a baseband device 43.
  • the antenna 41 is connected to the radio frequency device 42.
  • the radio frequency device 42 receives information through the antenna 41 and transmits the received information to the baseband device 43 for processing.
  • the baseband device 43 processes the information to be transmitted and transmits it to the radio frequency device 42, which processes the received information and transmits it via the antenna 41.
  • the network device 400 includes: at least one transmit link and at least one receive link, where the transmit link and the receive link have different operating frequencies.
  • the above-described band processing device may be located in the baseband device 43, and the method performed by the network device in the above embodiment may be implemented in the baseband device 43, which includes the processor 44 and the memory 45.
  • the baseband device 43 may include, for example, at least one baseband board on which a plurality of chips are disposed, as shown in FIG. 4, one of which is, for example, a processor 44, connected to the memory 45 to call a program in the memory 45 to execute The network device operation shown in the above method embodiment.
  • the baseband device 43 can also include a network interface 46 for interacting with the radio frequency device 42, such as a common public radio interface (CPRI).
  • a network interface 46 for interacting with the radio frequency device 42, such as a common public radio interface (CPRI).
  • CPRI common public radio interface
  • the processor here may be a processor or a collective name of multiple processing elements.
  • the processor may be a CPU, an ASIC, or one or more configured to implement the method performed by the above network device.
  • An integrated circuit such as one or more microprocessor DSPs, or one or more field programmable gate array FPGAs.
  • the storage element can be a memory or a collective name for a plurality of storage elements.
  • Memory 45 can be either volatile memory or non-volatile memory, or can include both volatile and non-volatile memory.
  • the non-volatile memory may be a Read-Only Memory (ROM), a Programmable ROM (Programmable ROM), or an Erasable PROM (EPROM). , electrically erasable programmable read only memory (EEPROM) or flash memory.
  • the volatile memory may be a Random Access Memory (RAM), which is used as an external cache.
  • RAM Random Access Memory
  • many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous).
  • DRAM double data rate synchronous dynamic random access memory
  • DDRSDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM Synchlink DRAM
  • DRRAM Direct Memory Bus
  • the network device 400 of the embodiment of the present disclosure further includes: a computer program stored on the memory 45 and operable on the processor 44, and the processor 44 calls a computer program in the memory 45 to execute the execution of each module shown in FIG. method.
  • the computer program when called by the processor 44, it can be used to: obtain a digital transmission signal sent by the transmission link and a digital reception signal received by the receiving link;
  • the computer program when called by the processor 44, it can be used to: obtain a useful signal and a self-interference signal in the digital received signal;
  • the step of constructing and filtering the nonlinear interference signal is not performed.
  • the computer program when called by the processor 44, it can be used to: obtain a useful signal in the digital received signal received by the receiving link when the transmitting link does not send a signal;
  • the self-interference signal in the digital received signal received by the receiving link is acquired.
  • the computer program is executable by the processor 44 to perform: estimating a channel response of the self-interference signal generated by the transmission link in the receiving link according to the digital transmission signal and the digital reception signal;
  • a nonlinear interference signal of the transmitting link to the receiving link is constructed.
  • the computer program when invoked by the processor 44, is operative to: estimate a frequency domain channel response of the self-interfering signal generated by the transmit link in the receive link based on the digital transmit signal and the digital receive signal; and/or,
  • the time domain channel response of the self-interference signal generated by the transmission link in the receiving link is estimated based on the digital transmission signal and the digital reception signal.
  • the computer program when called by the processor 44, it can be used to perform frequency domain conversion of the digital received signal and frequency of the nonlinear component of the digital transmitted signal when the receiving link only receives the signal transmitted by the transmitting link.
  • the domain transform is divided to estimate the frequency domain channel response of the self-interference signal; the specific formula is as follows:
  • a frequency domain transform representing a response component of a nonlinear component of a digital transmission signal in the receive chain Y( ⁇ ) representing a frequency domain transform of the digital received signal
  • HNL( ⁇ ) representing a frequency domain transform of a nonlinear component of the digital transmit signal
  • the computer program can be used to execute when invoked by processor 44:
  • the ratio of the signal strength of the useful signal to the signal strength of the self-interference signal is less than the second threshold, then Estimating the frequency domain channel response of the self-interference signal; wherein a frequency domain transform representing a response component of a nonlinear component of a digital transmission signal in the receive chain, Y( ⁇ ) representing a frequency domain transform of the digital received signal, and HNL( ⁇ ) representing a frequency domain transform of a nonlinear component of the digital transmit signal;
  • the value of N is proportional to the ratio of signal strength.
  • hm(t) represents the squared signal of the digital transmitted signal
  • x(t) represents the digital transmitted signal
  • HM( ⁇ ) represents the frequency domain transform of the squared signal
  • X( ⁇ ) represents the frequency domain transform of the digital transmitted signal
  • the computer program when invoked by the processor 44, can be used to perform: constructing a non-linear interference signal of the transmit link to the receive link based on the channel response and the squared signal of the digital transmit signal.
  • the computer program can be used to execute when invoked by processor 44:
  • a nonlinear interference signal of the transmit link to the receive link in the time domain is constructed according to the time domain channel response and the squared signal of the digital transmit signal.
  • the computer program can be used to execute when invoked by processor 44:
  • a frequency domain transform representing the response function of the squared signal in the receive chain
  • X( ⁇ ) representing the frequency domain transform of the digital transmit signal
  • the computer program can be used to execute when invoked by processor 44:
  • a time domain transform representing the response function of the squared signal in the receive chain
  • x(t) representing the digital transmit signal
  • the computer program can be used to execute when called by the processor 44:
  • hi(t) represents a product signal of the first digital transmission signal and the second digital transmission signal
  • x1(t) represents the first digital transmission signal transmitted by the transmission link
  • x2(t) represents the second transmission of the transmission link.
  • Digitally transmitted signal HI( ⁇ ) represents the frequency domain transform of the response function of the intermodulation signal in the receive chain
  • X1( ⁇ ) represents the frequency domain transform of the first digital transmit signal
  • X2( ⁇ ) represents the second digital transmit signal Frequency domain transform.
  • the computer program when invoked by the processor 44, can be used to perform: constructing a non-linear interference signal of the transmit link to the receive link based on the channel response and the product signal of the digital transmit signal.
  • the computer program can be used to execute when invoked by processor 44:
  • a nonlinear interference signal of the transmission link to the receiving link in the time domain is constructed.
  • the computer program can be used to execute when invoked by processor 44:
  • Representing a nonlinear interference signal in the frequency domain Representing the frequency domain transform of the response signal of the product signal in the receive chain
  • X1( ⁇ ) represents the frequency domain transform of the first digital transmit signal
  • X2( ⁇ ) represents the frequency domain transform of the second digital transmit signal
  • the computer program when called by the processor 44, it can be used to perform: transforming the time domain channel response according to the frequency domain channel response;
  • Representing a nonlinear interference signal in the time domain Representing the time domain transform of the response signal of the product signal in the receive chain
  • x1(t) represents the first digital transmit signal transmitted by the transmit link
  • x2(t) represents the second digital transmit signal transmitted by the transmit link.
  • the computer program can be used to execute when invoked by processor 44:
  • the nonlinear interference signal in the receiving link is filtered in the frequency domain.
  • the computer program can be used to execute when invoked by processor 44:
  • Representing a useful signal in a digital received signal Representing a useful signal in a digital received signal
  • y(t) representing a digital received signal received on the receiving link
  • 2T A represents the timing advance of the transmit link and the receive link.
  • the computer program when called by the processor 44, it can be used for execution: Filtering out nonlinear interference signals in the frequency domain of the receiving link;
  • a frequency domain transform representing a useful signal in a digital received signal Y( ⁇ ) representing a frequency domain transform of a digital received signal received by the receiving link
  • a frequency domain transform representing a non-linear interference signal of a transmit link to a receive link a frequency domain transform representing a useful signal in a digital received signal
  • Y( ⁇ ) representing a frequency domain transform of a digital received signal received by the receiving link
  • a frequency domain transform representing a non-linear interference signal of a transmit link to a receive link.
  • the computer program when called by the processor 44, it can be used to perform: constructing a nonlinear interference signal of each transmitting link to the receiving link according to at least two digital transmitting signals and digital receiving signals respectively transmitted by at least two transmitting links. .
  • the computer program when called by the processor 44, it can be used to perform: separately filtering out all non-linear interference signals in each receiving link; wherein all non-linear interference signals are non-linearities of the respective transmitting links to the receiving links. The superimposed signal of the interference signal.
  • the terminal capability information reported by the terminal for indicating whether to support the non-linear interference signal filtering capability is received.
  • the network device may be a Global System of Mobile communication (GSM) or a Code Division Multiple Access (CDMA) base station (Base Transceiver Station, BTS for short) or a wideband code.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • BTS Base Transceiver Station
  • WCDMA Wideband Code Division Multiple Access
  • eNB or eNodeB evolved Node B
  • eNodeB evolved Node B
  • a base station or the like in a future 5G network is not limited herein.
  • the network device in the embodiment of the present disclosure estimates the interference transmitted by the transmitting link and received on the receiving link according to the digital transmitting signal transmitted in the transmitting link and the digital receiving signal received in the receiving link.
  • the non-linear interference signal further removes the non-linear interference signal in the receiving link to improve the multi-frequency performance of the transceiver node and improve the spectrum efficiency of the system.
  • an embodiment of the present disclosure further provides a terminal, including a processor, a memory, and a computer program stored on the memory and operable on the processor, and the processor implements the computer program as described above.
  • the steps in the signal processing method further provides a computer readable storage medium having a computer program stored thereon, the computer program being executed by the processor to implement the steps of the signal processing method as described above.
  • FIG. 5 is a block diagram of a terminal 500 according to another embodiment of the present disclosure.
  • the terminal shown in FIG. 5 includes at least one processor 501, a memory 502, a user interface 503, and a network interface 504.
  • the various components in terminal 500 are coupled together by a bus system 505.
  • bus system 505 is used to implement connection communication between these components.
  • the bus system 505 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as bus system 505 in FIG.
  • the terminal 500 includes: at least one transmitting link and at least one receiving link, where the working frequency of the transmitting link and the receiving link are different.
  • the user interface 503 can include a display or a pointing device (eg, a touchpad or touch screen, etc.).
  • the memory 502 in an embodiment of the present disclosure may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read only memory (PROM), an erasable programmable read only memory (Erasable PROM, EPROM), or an electric Erase programmable read only memory (EEPROM) or flash memory.
  • the volatile memory can be a Random Access Memory (RAM) that acts as an external cache.
  • RAM Random Access Memory
  • many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM).
  • SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • SDRAM Synchronous Connection Dynamic Random Access Memory
  • DRRAM direct memory bus random access memory
  • memory 502 stores elements, executable modules or data structures, or a subset thereof, or their extended set: operating system 5021 and application 5022.
  • the operating system 5021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks.
  • the application 5022 includes various applications, such as a Media Player, a Browser, etc., for implementing various application services.
  • a program implementing the method of the embodiments of the present disclosure may be included in the application 5022.
  • the terminal 500 further includes: a computer program stored on the memory 502 and executable on the processor 501, and specifically, may be a computer program in the application 5022, the computer program being executed by the processor 501 And implementing the following steps: acquiring a digital transmission signal sent by the transmitting link and a digital receiving signal received by the receiving link; constructing the transmitting link pair according to the digital transmitting signal and the digital receiving signal a non-linear interference signal of the receive link; filtering the non-linear interference signal in the receive link.
  • a computer program stored on the memory 502 and executable on the processor 501 and specifically, may be a computer program in the application 5022, the computer program being executed by the processor 501 And implementing the following steps: acquiring a digital transmission signal sent by the transmitting link and a digital receiving signal received by the receiving link; constructing the transmitting link pair according to the digital transmitting signal and the digital receiving signal a non-linear interference signal of the receive link; filtering the non-linear interference signal in the receive link.
  • Processor 501 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 501 or an instruction in a form of software.
  • the processor 501 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in connection with the embodiments of the present disclosure may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 502, and the processor 501 reads the information in the memory 502 and completes the steps of the above method in combination with its hardware.
  • the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof.
  • the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processing (DSP), Digital Signal Processing Equipment (DSP Device, DSPD), programmable Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general purpose processor, controller, microcontroller, microprocessor, other for performing the functions described herein In an electronic unit or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSP Digital Signal Processing
  • DSP Device Digital Signal Processing Equipment
  • PLD programmable Programmable Logic Device
  • FPGA Field-Programmable Gate Array
  • the techniques described herein can be implemented by modules (eg, procedures, functions, and so on) that perform the functions described herein.
  • the software code can be stored in memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • the following steps may be implemented: acquiring a digital transmission signal sent by the transmission link and a digital reception signal received by the receiving link;
  • the following steps may be further implemented: acquiring a useful signal and a self-interference signal in the digital received signal;
  • the step of constructing and filtering the nonlinear interference signal is not performed.
  • the following steps may be further implemented: acquiring a useful signal in the digital received signal received by the receiving link when the transmitting link does not send a signal;
  • the self-interference signal in the digital received signal received by the receiving link is acquired.
  • the following steps may be further implemented: estimating, according to the digital transmission signal and the digital reception signal, a channel response of the self-interference signal generated by the transmission link in the receiving link;
  • a nonlinear interference signal of the transmitting link to the receiving link is constructed.
  • the following steps may be further implemented: estimating a frequency domain channel response of the self-interference signal generated by the transmission link in the receiving link according to the digital transmission signal and the digital reception signal; and/or,
  • the time domain channel response of the self-interference signal generated by the transmission link in the receiving link is estimated based on the digital transmission signal and the digital reception signal.
  • the frequency domain transform of the digital received signal is divided by the frequency domain transform of the nonlinear component of the digital transmitted signal, and the frequency domain channel response of the self-interference signal is estimated;
  • a frequency domain transform representing a response component of a nonlinear component of a digital transmission signal in the receive chain Y( ⁇ ) representing a frequency domain transform of the digital received signal
  • HNL( ⁇ ) representing a frequency domain transform of a nonlinear component of the digital transmit signal
  • the ratio of the signal strength of the useful signal to the signal strength of the self-interference signal is less than the second threshold, then Estimating the frequency domain channel response of the self-interference signal; wherein a frequency domain transform representing a response component of a nonlinear component of a digital transmission signal in the receive chain, Y( ⁇ ) representing a frequency domain transform of the digital received signal, and HNL( ⁇ ) representing a frequency domain transform of a nonlinear component of the digital transmit signal;
  • the value of N is proportional to the ratio of signal strength.
  • the self-interference signal is a second harmonic signal
  • hm(t) represents the squared signal of the digital transmitted signal
  • x(t) represents the digital transmitted signal
  • HM( ⁇ ) represents the frequency domain transform of the squared signal
  • X( ⁇ ) represents the frequency domain transform of the digital transmitted signal
  • the following steps may be further implemented: constructing a nonlinear interference signal of the transmission link to the receiving link according to the channel response and the squared signal of the digital transmission signal.
  • a nonlinear interference signal of the transmit link to the receive link in the time domain is constructed according to the time domain channel response and the squared signal of the digital transmit signal.
  • a frequency domain transform representing the response function of the squared signal in the receive chain
  • X( ⁇ ) representing the frequency domain transform of the digital transmit signal
  • the computer program can be used to execute when invoked by processor 44:
  • a time domain transform representing the response function of the squared signal in the receive chain
  • x(t) representing the digital transmit signal
  • the computer program can be used to execute when called by the processor 44:
  • hi(t) represents a product signal of the first digital transmission signal and the second digital transmission signal
  • x1(t) represents the first digital transmission signal transmitted by the transmission link
  • x2(t) represents the second transmission of the transmission link.
  • Digitally transmitted signal HI( ⁇ ) represents the frequency domain transform of the response function of the intermodulation signal in the receive chain
  • X1( ⁇ ) represents the frequency domain transform of the first digital transmit signal
  • X2( ⁇ ) represents the second digital transmit signal Frequency domain transform.
  • the following steps may be further implemented: constructing a nonlinear interference signal of the transmission link to the receiving link according to the channel response and the product signal of the digital transmission signal.
  • a nonlinear interference signal of the transmission link to the receiving link in the time domain is constructed.
  • Representing a nonlinear interference signal in the frequency domain Representing the frequency domain transform of the response signal of the product signal in the receive chain
  • X1( ⁇ ) represents the frequency domain transform of the first digital transmit signal
  • X2( ⁇ ) represents the frequency domain transform of the second digital transmit signal
  • the following steps may be further implemented: transforming the time domain channel response according to the frequency domain channel response;
  • Representing a nonlinear interference signal in the time domain Representing the time domain transform of the response signal of the product signal in the receive chain
  • x1(t) represents the first digital transmit signal transmitted by the transmit link
  • x2(t) represents the second digital transmit signal transmitted by the transmit link.
  • the nonlinear interference signal in the receiving link is filtered in the frequency domain.
  • Representing a useful signal in a digital received signal Representing a useful signal in a digital received signal
  • y(t) representing a digital received signal received on the receiving link
  • 2T A represents the timing advance of the transmit link and the receive link.
  • the following steps may also be implemented: Filtering out nonlinear interference signals in the frequency domain of the receiving link;
  • a frequency domain transform representing a useful signal in a digital received signal Y( ⁇ ) representing a frequency domain transform of a digital received signal received by the receiving link
  • a frequency domain transform representing a non-linear interference signal of a transmit link to a receive link a frequency domain transform representing a useful signal in a digital received signal
  • Y( ⁇ ) representing a frequency domain transform of a digital received signal received by the receiving link
  • a frequency domain transform representing a non-linear interference signal of a transmit link to a receive link.
  • the following steps may be further implemented: constructing nonlinearity of each transmitting link to the receiving link according to at least two digital transmitting signals and digital receiving signals respectively transmitted by at least two transmitting links. Interference signal.
  • the following steps may be further implemented: filtering out each non-linear interference signal in each receiving link separately; wherein all non-linear interference signals are for each transmitting link to the receiving link. A superimposed signal of a nonlinear interference signal.
  • the terminal capability information indicating whether the non-linear interference signal filtering capability is supported is reported to the network device.
  • the terminal may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides voice and/or other service data connectivity to the user, a handheld device with a wireless connection function, or other processing device connected to the wireless modem. .
  • the wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a mobile terminal.
  • RAN Radio Access Network
  • the computer for example, can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with the wireless access network.
  • the wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, and a remote terminal.
  • the access terminal, the user terminal (User Terminal), the user agent (User Agent), and the user device (User Device or User Equipment) are not limited herein.
  • the terminal of the embodiment of the present disclosure estimates the nonlinearity of the interference transmitted by the transmitting link and received on the receiving link according to the digital transmitting signal transmitted in the transmitting link and the digital receiving signal received in the receiving link. Interfering with the signal, and further deleting the non-linear interference signal in the receiving link, so as to improve the multi-frequency performance of the transceiver node and improve the spectrum efficiency of the system.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the portion of the technical solution of the present disclosure that contributes in essence or to the prior art or the portion of the technical solution may be embodied in the form of a software product stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present disclosure.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
  • the objects of the present disclosure can also be achieved by running a program or a set of programs on any computing device.
  • the computing device can be a well-known general purpose device.
  • the objects of the present disclosure may also be realized by merely providing a program product including program code for implementing the method or apparatus. That is to say, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure.
  • the storage medium may be any known storage medium or any storage medium developed in the future.
  • various components or steps may be decomposed and/or recombined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Noise Elimination (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de traitement de signaux, un dispositif de réseau, un terminal et un support de stockage lisible par ordinateur, le procédé comportant les étapes consistant à: acquérir un signal d'émission numérique émis par une liaison d'émission et un signal de réception numérique reçu par une liaison de réception; en fonction du signal d'émission numérique et du signal de réception numérique, construire un signal d'interférence non linéaire de la liaison d'émission par rapport à la liaison de réception; et éliminer par filtrage le signal d'interférence non linéaire dans la liaison de réception.
PCT/CN2018/100434 2017-08-29 2018-08-14 Procédé de traitement de signaux, dispositif de réseau, terminal et support de stockage lisible par ordinateur WO2019042123A1 (fr)

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CN201710759054.XA CN109428624B (zh) 2017-08-29 2017-08-29 信号处理方法、网络设备、终端及计算机可读存储介质

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