WO2015165103A1 - 用于干扰消除的方法和终端 - Google Patents
用于干扰消除的方法和终端 Download PDFInfo
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- WO2015165103A1 WO2015165103A1 PCT/CN2014/076665 CN2014076665W WO2015165103A1 WO 2015165103 A1 WO2015165103 A1 WO 2015165103A1 CN 2014076665 W CN2014076665 W CN 2014076665W WO 2015165103 A1 WO2015165103 A1 WO 2015165103A1
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- WIPO (PCT)
- Prior art keywords
- signal
- terminal
- reconstruction information
- interference
- resource
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/0026—Interference mitigation or co-ordination of multi-user interference
- H04J11/0036—Interference mitigation or co-ordination of multi-user interference at the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
Definitions
- Embodiments of the present invention relate to the field of communication technologies, and, more particularly, to a method and terminal for interference cancellation. Background technique
- a wireless local area network such as a mobile cellular communication system
- a fixed wireless access FWA, Fixed Wireless Access
- a base station BS, Base Station
- AP Access Point
- Communication nodes such as relay stations (RS, Relay Station) and user equipment (UE, User Equipment) usually have the ability to transmit their own signals and receive signals from other communication nodes. Since the attenuation of the wireless signal in the wireless channel is very large, the signal from the communication peer arrives at the receiving end is very weak compared to its own transmitted signal. For example, the power difference between the transmitting and receiving signals of one communication node in the mobile cellular communication system is reached.
- the transmission and reception of the wireless signal are usually distinguished by different frequency bands or time periods.
- Frequency Division Duplex FDD
- transmission and reception use different frequency bands separated by a certain guard band for communication.
- Time Division Duplex TDD
- transmission and reception are separated by a certain distance.
- the different time periods of the protection interval are communicated, wherein the protection band in the FDD system and the protection time interval in the TDD system are both to ensure sufficient isolation between reception and transmission, and to avoid interference caused by transmission.
- Wireless full-duplex technology differs from existing FDD or TDD technologies in that it can perform both receive and transmit operations on the same wireless channel.
- the full-duplex technology of wireless full-duplex technology is twice as efficient as FDD or TDD.
- the premise of implementing wireless full-duplex is to avoid, reduce and eliminate the strong interference of the transmitted signal of the same transceiver to the received signal (called self-interference), so as to prevent the correct reception of the useful signal. Make an impact.
- the research on interference cancellation of the existing wireless full-duplex system mostly focuses on eliminating the self-interference signal development of each communication node.
- this is based on an ideal point-to-point full-duplex communication scenario.
- the uplink signal of one terminal may interfere with the reception of the downlink signal of the other terminal, so that the interfered terminal cannot Receive useful signals correctly.
- Embodiments of the present invention provide a method and terminal for interference cancellation, which can cancel an interference signal between terminals in a received signal.
- a first aspect provides a method for interference cancellation, the method comprising: determining, by a first terminal, a channel parameter of a transmit antenna of a second terminal to a receive antenna of a first terminal; the first terminal receiving the first signal at the first resource
- the first signal includes: a first interference signal and a useful signal from the base station, where the first interference signal is an interference signal generated by the second terminal transmitting the second signal to the base station by the first resource; the first terminal determines the first according to the channel parameter.
- the first interfering signal in the signal and eliminating the first interfering signal.
- the second aspect provides a method for interference cancellation, where the method includes: the second terminal sends a third signal to the base station in the second resource, where the second resource does not have a downlink signal sent to the first terminal, where The second terminal receives the second interference signal generated by the third signal at the second resource; the second terminal sends the reconstruction information of the third signal to the first terminal, so that the first terminal reconstructs the information according to the third signal and the second And determining, by the interference signal, a channel parameter of the transmit antenna of the second terminal to the receive antenna of the first terminal, where the resource used by the second terminal to transmit the reconstruction information of the third signal is different from the second resource; The resource sends a second signal to the base station, where the first terminal receives the first signal, where the first signal includes: a first interference signal and a useful signal from the base station, where the first interference signal is the second terminal in the first resource The interference signal generated by the second signal is sent to the base station.
- the third aspect provides a terminal, where the terminal includes: a determining module 310, configured to determine a channel parameter of a transmitting antenna of the second terminal to a receiving antenna of the terminal; and a first receiving module 320, configured to receive, at the first resource, the first
- the first signal includes: a first interference signal and a useful signal from the base station, where the first interference signal is an interference signal generated by the second terminal transmitting the second signal to the base station by the first resource; the interference cancellation module 330 is configured to determine The channel parameter determined by the module 310 determines a first interference signal in the first signal received by the first receiving module 320, and cancels the first interference signal.
- the fourth aspect provides a terminal, where the terminal includes: a first sending module 410, configured to send, by the second resource, a third signal to the base station, where the second resource does not have a downlink signal sent to the first terminal, where a terminal receives the second interference signal generated by the third signal in the second resource, and the second sending module 420 is configured to send the reconstruction information of the third signal to the first terminal, so that the first terminal is based on the weight of the third signal.
- a first sending module 410 configured to send, by the second resource, a third signal to the base station, where the second resource does not have a downlink signal sent to the first terminal, where a terminal receives the second interference signal generated by the third signal in the second resource
- the second sending module 420 is configured to send the reconstruction information of the third signal to the first terminal, so that the first terminal is based on the weight of the third signal.
- the information and the second interference signal determine a channel parameter of the receiving antenna of the terminal to the receiving antenna of the first terminal, where the resource used by the terminal to transmit the reconstruction information of the third signal is different from the second resource; the third sending module 430 , configured to send a second signal to the base station at the first resource, The first signal is received by the first terminal, where the first signal includes: a first interference signal and a useful signal from the base station, where the first interference signal is an interference signal generated by the terminal transmitting the second signal to the base station by the first resource. .
- the method and the terminal for interference cancellation provided by the embodiment of the present invention can implement the interference signal between the terminals on the signal received by the interfered terminal according to the channel parameter between the interfering terminal and the interfered terminal. eliminate.
- 1 is a schematic diagram of a scenario of a method for interference cancellation to which an embodiment of the present invention is applied.
- 2 is a schematic flow chart of a method for interference cancellation in accordance with one embodiment of the present invention.
- 3 is a schematic flow diagram of a method for interference cancellation in accordance with another embodiment of the present invention.
- FIG. 4 is a schematic flow diagram of a method for interference cancellation in accordance with another embodiment of the present invention.
- Figure 5 is a schematic block diagram of a terminal in accordance with one embodiment of the present invention.
- Figure 6 is a schematic block diagram of a determination module in accordance with one embodiment of the present invention.
- FIG. 7 is a schematic block diagram of a terminal according to another embodiment of the present invention.
- FIG. 8 is a schematic block diagram of a terminal according to another embodiment of the present invention.
- FIG. 9 is a schematic block diagram of a terminal in accordance with another embodiment of the present invention. detailed description
- FIG. 1 shows a schematic diagram of a scenario in which a method for interference cancellation is applied in accordance with an embodiment of the present invention.
- one base station and two terminals communicate. If the base station has Full-duplex communication capability. If two terminals only have TDD or FDD communication capabilities, it is possible that the second terminal transmits the uplink signal and the time-frequency resource used by the first terminal to receive the downlink signal is the same. If both the base station and the two terminals have full-duplex communication capability, it is also possible that the second terminal transmits the uplink signal and the time-frequency resource used by the first terminal to receive the downlink signal is the same.
- Embodiments of the present invention provide a scheme for performing interference cancellation on an interference signal between terminals as described above.
- h ra can be obtained by channel estimation or other methods
- x ra can be obtained from the terminal generating the interference or obtained by estimation.
- the ! portion of the signal received by the interfering terminal will hereinafter be referred to as an interference signal, such as a first interference signal and a second interference signal.
- the terminal is an access terminal that uses wireless full-duplex technology or wireless half-duplex technology, and may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, and a remote station.
- remote terminal mobile device, user terminal, terminal, wireless communication device, user agent, user device or user equipment (UE, User Equipment).
- the terminal can be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant), with wireless communication.
- the base station may be used to communicate with the mobile device, and the base station may Is a Wi-Fi AP (Access Point, Wireless Access Point), or GSM (Global System of Mobile communication) or CDMA (Code Division Multiple Access) BTS (Base Transceiver Station) , the base station), may be an NB (NodeB, base station) in WCDMA (Wideband Code Division Multiple Access), or may be an eNB or an eNodeB ( Evolutional Node) in LTE (Long Term Evolution) B, evolved base station), or a relay station or access point, or a base station device in a future 5G network.
- NB NodeB, base station
- WCDMA Wideband Code Division Multiple Access
- eNB Evolutional Node
- LTE Long Term Evolution
- evolved base station evolved base station
- a relay station or access point or a base station device in a future 5G network.
- FIG. 1 is only a typical scenario for applying the method for interference cancellation in the embodiment of the present invention, and may further include multiple terminals similar to the first terminal or the second terminal in the scenario of the application. This embodiment of the present invention does not limit this.
- the method 100 includes:
- the first terminal determines a channel parameter of the transmit antenna of the second terminal to the receive antenna of the first terminal.
- the first terminal receives the first signal at the first resource, where the first signal includes: a first interference signal and a useful signal from the base station, where the first interference signal is generated by the second terminal transmitting the second signal to the base station by using the first resource.
- Interference signal includes: a first interference signal and a useful signal from the base station, where the first interference signal is generated by the second terminal transmitting the second signal to the base station by using the first resource.
- the first terminal determines a first interference signal in the first signal according to the channel parameter, and cancels the first interference signal.
- the first terminal can implement, according to the channel parameters of the receiving antenna of the second terminal to the receiving antenna of the first terminal, Elimination of interference signals.
- S110 the first terminal determines that there are multiple channel parameters of the transmit antenna of the second terminal to the receive antenna of the first terminal.
- S110 may include:
- the first terminal receives the second interference signal at the second resource, where the second interference signal is an interference signal generated by the second terminal sending the third signal to the base station by the second resource, where the second resource does not exist to the first terminal.
- the first terminal receives the reconstruction information of the third signal sent by the second terminal, and the resource used by the second terminal to send the reconstruction information of the third signal is different from the second resource.
- the first terminal determines the second end according to the reconstruction information of the second interference signal and the third signal.
- the channel parameters of the transmitting antenna of the terminal to the receiving antenna of the first terminal.
- the base station does not send a signal to the first terminal
- the signal received by the first terminal It can be approximated as the second interference signal generated by the second terminal transmitting the third signal.
- the third signal can be reconstructed by using the reconstruction information of the third signal, and the channel of the transmitting antenna of the second terminal to the receiving antenna of the first terminal can be estimated according to the second interference signal and the third signal obtained by the reconstruction. Parameters such as amplitude and phase.
- the received signal may be first subjected to self-interference cancellation when estimating the channel parameter.
- the residual signal after the interference cancellation can be approximated as the second interference signal, which is not limited in the embodiment of the present invention.
- the third signal sent by the second terminal in the second resource is a fixed signal that is agreed by the first terminal and the second terminal in advance.
- the third signal is only used to test the channel parameters between the two terminals, not the uplink signals sent to the base station.
- the second terminal since the third signal is a fixed signal that is agreed in advance, the second terminal does not need to send the reconstruction information of the third signal to the first terminal, but needs to allocate two terminals specifically for estimating the channel.
- the time-frequency resource of the parameter is a fixed signal that is agreed by the first terminal and the second terminal in advance.
- the schemes of S111 to S113 can save resource overhead to a large extent compared to the allocation of resources dedicated to estimating channel parameters for two terminals.
- the channel parameters between the terminals are estimated, which is not limited by the embodiment of the present invention.
- the reconstruction information of the third signal includes: The unmodulated digital baseband signal and the modulation mode corresponding to the third signal; before the first terminal determines the first interference signal in the first signal according to the channel parameter, and cancels the first interference signal, the method 100 further includes: The terminal receives the reconstruction information of the second signal sent by the second terminal, where the reconstruction information of the second signal includes an unmodulated digital baseband signal and a modulation mode corresponding to the second signal, and the second terminal sends the reconstruction information of the second signal.
- the resource used is different from the first resource.
- the first terminal determines the first interference signal in the first signal according to the channel parameter, and eliminates the first interference signal, and includes: the first terminal reconstructing information and channel according to the second signal. a parameter that determines a first interfering signal in the first signal and cancels the first interfering signal.
- the reciprocal of the first threshold may be that the first terminal that is interfered does not need to perform the terminal.
- the signal-to-noise ratio required for the wanted signal can be correctly estimated.
- the reciprocal of the second threshold may be the signal to noise ratio required by the first terminal that is disturbed to correctly estimate the useful signal.
- the power ratio of the interference signal and the useful signal between the two terminals is usually small, ⁇ ⁇ ) ⁇ ⁇ 10 (1 ⁇ . In this case, the interfered first terminal cannot correctly estimate the useful signal sent by the base station or the second signal sent by the second terminal from the received first signal in the second time-frequency resource.
- the second resource is a resource used by the first terminal to estimate channel parameters between the terminals.
- the first terminal obtains the second interference signal after the second interference signal received by the low noise amplifier (LNA, Low Noise Amplifier), the down conversion, and the analog-to-digital converter (ADC) are processed. Corresponding digital baseband signal.
- LNA Low Noise Amplifier
- ADC analog-to-digital converter
- the first terminal may receive, by using an outband resource, reconfiguration information of the third signal sent by the second terminal, where the reconstruction information of the third signal includes an unmodulated digital baseband signal and a modulation mode corresponding to the third signal.
- the out-of-band resource refers to a resource other than the time-frequency resource that the base station and the terminal communicate with each other, for example, the second terminal can communicate to the first terminal by using a wired connection communication method, a device-to-device communication method, or a wireless local area network communication manner. Transmitting information of the third signal is transmitted.
- the second terminal may send the third signal to the first terminal and the third signal may be sent to the base station; the second terminal may also send the third signal to the first terminal in advance before sending the third signal to the base station.
- Refactoring information The above measures may enable the first terminal to perform channel parameter estimation according to the reconstruction information of the third signal in time after receiving the second interference signal, thereby avoiding delay.
- the first terminal may reconstruct, according to the unmodulated digital baseband signal and the modulation mode corresponding to the third signal, the third signal sent by the second terminal to the base station in the second resource.
- the third signal obtained by the reconstruction is a modulated digital baseband signal.
- the channel parameters of the transmit antenna of the second terminal to the receive antenna of the first terminal may be estimated according to the digital baseband signal corresponding to the second interference signal and the third signal obtained by the reconstruction.
- the relative position of the terminal and the environment in which it is located remain unchanged for a period of time. It can be considered that the channel parameter remains unchanged for a period of time, so the channel parameter can be used for the second resource. Interference between terminals of the first resource of similar time is eliminated.
- the first resource is a resource that the first terminal needs to perform inter-terminal interference cancellation.
- the first signal received by the first terminal includes: a first interference signal and a useful signal from the base station, where the first interference signal is an interference signal generated by the second terminal transmitting the second signal to the base station by the first resource.
- Inter-terminal interference cancellation is to eliminate the first interference signal.
- the first terminal can receive it
- the first signal is processed by an LNA, a down-conversion, and an ADC to obtain a digital baseband signal corresponding to the first signal.
- the method 100 further includes: the first terminal receiving the reconstruction information of the second signal sent by the second terminal by using the outband resource, where the reconstruction information of the second signal includes the unmodulated digital baseband signal corresponding to the second signal. And modulation method. Similar to the channel parameters of the receiving antenna of the second terminal to the receiving antenna of the first terminal, in order to perform interference cancellation in time and avoid delay, the second terminal sends the reconstruction information of the second signal to the base station to the first terminal.
- the transmitting the second signal may be simultaneous; the second terminal may also send the reconstruction information of the second signal to the first terminal in advance before transmitting the second signal to the base station.
- the first terminal may reconstruct, according to the unmodulated digital baseband signal and the modulation mode corresponding to the second signal, the downlink second signal sent by the second terminal to the terminal by the first resource, where the reconstructed
- the second signal is a modulated digital baseband signal.
- the first interference signal received by the first terminal at the first resource may be determined.
- the first interference signal in the digital baseband signal corresponding to the first signal may be eliminated, thereby obtaining a digital baseband signal corresponding to the useful signal in the first signal.
- the first terminal may also not reconstruct the second signal, and directly estimate, according to the reconstruction information of the second signal and the channel parameter obtained in S113, that the first terminal receives the second resource.
- the first interference signal in the first signal is not limited in this embodiment of the present invention.
- the first terminal further sends a signal to the first resource
- the first signal may be self-interference canceled before the inter-terminal digital interference cancellation is performed, which is not limited in this embodiment of the present invention.
- reconstructing the second signal and the third signal refers to reconstructing the modulated digital baseband signal of the second signal and the third signal, in addition to reconstructing according to the unmodulated digital baseband signal and the modulation mode.
- the modulated digital baseband signal can also be obtained directly from the second terminal.
- the reconstruction information of the second signal further comprises: a nonlinear estimation of the radio frequency channel of the second signal
- the reconstruction information of the third signal further comprises: a nonlinear estimation of the radio frequency channel of the third signal.
- the third signal when the power ratio of the interference signal and the useful signal in the signal received by the first terminal is greater than or equal to the second threshold, and is less than or equal to the third threshold, the third signal is The reconstruction information includes: an unmodulated digital baseband signal corresponding to the third signal and Modulation.
- the reciprocal of the second threshold may be the signal to noise ratio required by the interfered first terminal to correctly estimate the useful signal.
- the third threshold may be the maximum power ratio that can be tolerated without affecting the normal reception of the digital useful signal by the receiving antenna. For example, when the distance between the first terminal and the second terminal that generate mutual interference is relatively close (several meters), and the terminal is far away from the base station (hundreds of meters), the power of the interference signal and the useful signal between the two terminals is relatively large, 1 ⁇ 1 is about 20 ⁇ 30dB. In this case, after the interfered first terminal obtains the channel parameters of the inter-terminal interference channel by channel estimation, the third signal transmitted by the second terminal can be obtained by estimation.
- the method for obtaining the channel parameters of the transmitting antenna of the second terminal to the receiving antenna of the first terminal may be similar to the acquiring method described in the previous embodiments S111 to S113; receiving the first signal and the first
- the processing of a signal is also similar to the method described in the previous embodiment S120, and details are not described herein again.
- the first terminal may reconstruct, according to the unmodulated digital baseband signal and the modulation mode corresponding to the second signal, the downlink second signal sent by the second terminal to the terminal by the first resource, where the reconstructed
- the second signal is a modulated digital baseband signal. Because the distance between the two terminals is relatively close and the terminal is far away from the base station, the first interference signal portion of the first signal received by the first terminal in the first resource is very strong, and can be more accurate according to the channel parameters obtained in S113.
- the second signal is calculated. Further, the first interference signal in the first signal can be determined.
- the first interfering signal in the digital baseband signal corresponding to the first signal may be cancelled, thereby obtaining a digital baseband signal corresponding to the useful signal in the first signal. For the same reason, the self-interference cancellation can be performed on the first signal, which is not limited by the embodiment of the present invention.
- the reconstruction information of the third signal further includes: a nonlinear estimation of the radio frequency channel of the third signal; determining, by the first terminal, the first interference signal in the first signal according to the channel parameter, and eliminating the first interference signal
- the method further includes: receiving, by the first terminal, reconstruction information of the second signal sent by the second terminal, where the reconstruction information of the second signal includes a nonlinear estimation of the radio frequency channel of the second signal, and the second terminal sends the second signal
- the resource used by the reconstructed information is different from the first resource.
- the first terminal determines the first interference signal in the first signal according to the channel parameter, and eliminates the first interference signal, and the method includes: reconstructing, according to the second signal, the first terminal The information and channel parameters determine a first interfering signal in the first signal and cancel the first interfering signal.
- the reconstruction information of the third signal includes: The method further includes: before the first terminal determines the first interference signal in the first signal according to the channel parameter, and cancels the first interference signal, the method further includes: receiving, by the first terminal, reconstruction information of the second signal sent by the second terminal.
- the reconstruction information of the second signal includes a radio frequency signal corresponding to the second signal, and the resource used by the second terminal to transmit the reconstruction information of the second signal is different from the first resource; the first terminal determines the first signal according to the channel parameter.
- the first interference signal and the cancellation of the first interference signal include: the first terminal determines the first interference signal in the first signal according to the reconstruction information and the channel parameter of the second signal, and eliminates the first interference signal.
- the third threshold may be the maximum power ratio that can be tolerated without affecting the normal reception of the digital useful signal by the receiving antenna.
- the power between the interference signal and the useful signal between the two terminals is relatively large, which is about PD I>40 dB.
- the dynamic range of the residual analog signal obtained after radio frequency self-interference cancellation of the received signal is large, which may cause residual analog in an analog-to-digital converter (ADC, Analog-to-Digital Converter).
- ADC Analog-to-Digital Converter
- the first terminal may receive the reconstruction information of the third signal sent by the second terminal by using the outband resource, where the reconstruction information of the third signal includes the radio frequency signal corresponding to the third signal.
- the second terminal may send the third signal to the first terminal and the third signal may be sent to the base station; or may send the third signal to the first terminal in advance before sending the third signal to the base station. Refactoring information.
- the first terminal may obtain the digital baseband signal corresponding to the third signal by using a down conversion, a low pass filter (LPF, Low Pass Filter) and an ADC processing, that is, reconstructing the first The digital baseband signal corresponding to the three signals. Further, the channel parameters of the transmitting antenna of the second terminal to the receiving antenna of the first terminal may be estimated according to the digital baseband signal corresponding to the second interference signal and the digital baseband signal corresponding to the third signal obtained by the reconstruction.
- LPF Low Pass Filter
- the method 100 further includes: the first terminal receiving the reconstruction information of the second signal sent by the second terminal, where the reconstruction information of the second signal includes the radio frequency signal corresponding to the second signal, and the second terminal
- the resource used by the side to transmit the reconstructed information of the second signal is different from the first resource.
- the second terminal may send the second signal to the first terminal and the second signal may be sent to the base station.
- the second signal may be sent to the first terminal in advance before the second signal is sent to the base station. Refactoring information.
- the first terminal reconstructs the radio frequency signal corresponding to the first interference signal according to the radio frequency signal corresponding to the first signal and the channel parameter obtained in S113, so as to perform radio interference cancellation between the terminals on the first signal, which may It is regarded as the interference elimination between the first-level terminals.
- the residual signal of the first signal through the inter-terminal radio frequency interference cancellation is processed by down-conversion, LPF and ADC to obtain the corresponding digital baseband signal.
- the corresponding digital signal of the baseband is obtained by downconverting, LPF and ADC processing of the RF signal corresponding to the second signal.
- the first signal may be self-interference canceled before the inter-terminal interference cancellation is performed, which is not limited in the embodiment of the present invention.
- the self-interference cancellation mentioned here includes radio frequency self-interference cancellation before radio frequency interference cancellation between terminals, and digital self-interference cancellation before performing inter-terminal digital interference cancellation.
- the first terminal receives the radio frequency signal corresponding to the second signal sent by the second terminal and/or the radio frequency signal corresponding to the third signal, and can be received by using a wired connection communication manner.
- the wired connection communication method can prevent the radio frequency signal corresponding to the second signal or the radio frequency signal corresponding to the third signal from being interfered by other radio frequency signals.
- the information that the first terminal receives the first signal sent by the second terminal and/or the information that the first terminal receives the third signal sent by the second terminal may be connected by using a wired connection communication method or device.
- Direct communication method such as device (D2D, Device to Device) communication method or wireless local area network (Wi-Fi, Wireless Fidelity) communication method.
- the resource used is a resource other than the time-frequency resource allocated by the base station to the first terminal.
- the first terminal can distinguish the signal received on the resource allocated by the base station from the information of the first signal / the information of the third signal.
- other achievable direct communication modes are also used, which are not limited by the embodiment of the present invention.
- the channel parameters between the terminals can be measured in real time, so as to obtain the most
- the channel information between the new terminals makes the channel parameters used when the first resource performs inter-terminal interference cancellation more accurate, and can achieve better interference cancellation effects.
- the interference signal in the signal received by the first terminal refers to an interference signal generated by the second terminal to send a signal to the base station in the signal received by the first terminal;
- the useful signal in the signal received by the first terminal is Refers to the useful signal received by the first terminal from the base station.
- the interference signal and the useful signal power ratio may be determined by estimating the distance between the first terminal and the second terminal and the distance between the terminal and the base station.
- the power ratio may also be determined by the power of the first terminal receiving the interference signal at the third resource and the power of the signal received by the first terminal at the fourth resource, where the power is the sum of the interference signal and the useful signal;
- the third resource does not have a downlink signal sent to the first terminal, and the second terminal sends an uplink signal to the base station.
- the first terminal receives the downlink signal sent by the base station, and the second terminal sends the uplink signal to the base station.
- the first terminal can accurately estimate channel parameters between terminals according to the reconstruction information of the signal sent by the second terminal to the base station by the second terminal, and the terminal The inter-channel parameters are applied to the interference cancellation of the signals received at the first resource, and a better interference cancellation effect can be obtained.
- the use of resources by each terminal is scheduled by the base station.
- the first terminal and the second terminal determine the second resource for estimating the channel parameter and the first resource for performing interference cancellation, and the base station may send the corresponding indication message to the first terminal and the second terminal by using the base station;
- the allocation of the terminal resources causes the first terminal and the second terminal to estimate channel parameters or perform interference cancellation on the corresponding resources according to the preset settings.
- the interference cancellation may be to eliminate all interference components in the signal (including the main path interference signal and the near-field interference signal), or to eliminate some interference components in the signal (including main path interference). Part of the signal and part of the near-field interference signal).
- FIG. 4 shows a schematic flow diagram of a method 200 for interference cancellation, which may be performed by an interfering terminal, ie, a second terminal, in accordance with an embodiment of the present invention.
- the method 200 includes:
- the second terminal sends a third signal to the base station in the second resource, where the second resource does not have a downlink signal sent to the first terminal, and the first terminal receives the second interference generated by the third signal in the second resource.
- the second terminal sends the reconstruction information of the third signal to the first terminal, so that the first terminal determines, according to the reconstruction information of the third signal and the second interference signal, the receiving of the second terminal by the transmitting antenna to the first terminal.
- a channel parameter of the antenna where the resource used by the second terminal to transmit the reconstruction information of the third signal is different from the second resource;
- the second terminal sends a second signal to the base station in the first resource, where the first terminal receives the first signal, where the first signal includes: the first interference signal and the useful signal from the base station, the first interference signal And transmitting, by the second terminal, the interference signal generated by the second signal to the base station in the first resource.
- the method for interference cancellation provided by the embodiment of the present invention, by transmitting, to the first terminal, the reconstruction information of the signal sent by the second terminal to the base station in the second resource, so that the first terminal can estimate the channel parameter between the terminals. According to the channel parameter and the reconstruction information of the signal sent by the second terminal to the base station by the first resource, the interference signal between the terminals can be eliminated on the signal received by the first resource.
- the reconstruction information of the third signal includes: The unmodulated digital baseband signal and the modulation mode corresponding to the three signals; the method 200 further includes: the second terminal transmitting the reconstruction information of the second signal to the first terminal, where the reconstruction information of the second signal includes the corresponding information of the second signal Modulated digital baseband signal and modulation scheme.
- the reconstruction information of the second signal further includes: a nonlinear estimation of the radio frequency channel of the second signal; and the reconstruction information of the third signal further includes: the radio frequency channel of the third signal Nonlinear estimation.
- the weight of the third signal is The information includes: an unmodulated digital baseband signal and modulation corresponding to the third signal the way.
- the reconstruction information of the third signal further includes: a nonlinear estimation of the radio frequency channel of the third signal; the method 200 further includes: the second terminal transmitting the second signal to the first terminal Reconstructing information, the reconstruction information of the second signal includes a nonlinear estimate of the radio frequency channel of the second signal.
- the reconstruction information of the third signal includes: the radio frequency signal corresponding to the third signal
- the method 200 further includes: the second terminal transmitting the reconstruction information of the second signal to the first terminal, where the reconstruction information of the second signal includes the radio frequency signal corresponding to the second signal.
- the sending, by the second terminal, the reconstruction information of the third signal to the first terminal may include: sending, by the second terminal, the third signal to the first terminal by using a wired connection communication mode, a device-to-device communication mode, or a wireless local area network communication mode. Refactoring information.
- the sending, by the second terminal, the reconstruction information of the second signal to the first terminal may include: sending, by the second terminal, the second signal to the first terminal by using a wired connection communication mode, a device-to-device communication mode, or a wireless local area network communication mode. Refactoring information.
- the direct communication may be performed in other manners, which is not limited by the embodiment of the present invention.
- the method for interference cancellation provided by the embodiment of the present invention, by transmitting, to the first terminal, the reconstruction information of the signal sent by the second terminal to the base station in the second resource, so that the first terminal can estimate the channel parameter between the terminals. According to the channel parameter and the reconstruction information of the signal sent by the second terminal to the base station by the first resource, the interference signal between the terminals can be eliminated on the signal received by the first resource.
- the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
- the implementation process constitutes any limitation.
- FIG. 5 shows a schematic block diagram of a terminal 300 in accordance with an embodiment of the present invention. As shown in FIG. 5, the terminal 300 includes:
- a determining module 310 configured to determine a channel parameter of a transmit antenna to a receive antenna of the second terminal
- the first receiving module 320 is configured to receive the first signal at the first resource, where the first signal includes: An interference signal and a useful signal from the base station, where the first interference signal is an interference signal generated by the second terminal transmitting the second signal to the base station by the first resource;
- the interference cancellation module 330 is configured to determine, according to the channel parameter determined by the determining module 310, the first interference signal in the first signal received by the first receiving module 320, and eliminate the first interference signal.
- the terminal provided by the embodiment of the present invention can perform the cancellation of the interference signal between the terminals on the signal received by the first resource according to the channel parameter of the transmitting antenna of the second terminal to the receiving antenna of the terminal 300.
- the determining module 310 includes:
- the first receiving unit 311 is configured to receive, by the second resource, a second interference signal, where the second interference signal is an interference signal generated by the second terminal sending the third signal to the base station by the second resource, where the second resource does not exist. a downlink signal sent by the terminal 300;
- the second receiving unit 312 is configured to receive the reconstruction information of the third signal sent by the second terminal, where the resource used by the second terminal to send the reconstruction information of the third signal is different from the second resource;
- the determining unit 313 is configured to determine, according to the second interference signal received by the first receiving unit 311 and the reconstruction information of the third signal received by the second receiving unit 312, a channel parameter of the transmitting antenna of the second terminal to the receiving antenna of the terminal 300. .
- the third signal received by the second receiving unit 312 includes: an unmodulated digital baseband signal and a modulation mode corresponding to the third signal; the terminal 300 further includes: a second receiving module 340, configured to receive, by the second terminal, reconstruction information of the second signal, The reconstruction information of the two signals includes an unmodulated digital baseband signal corresponding to the second signal and a modulation mode, and the resource used by the second terminal to transmit the reconstruction information of the second signal is different from the first resource; the interference cancellation module 330 is specifically used. And: determining, according to the reconstruction information of the second signal received by the second receiving module 340 and the channel parameter determined by the determining unit 313, the first interference signal in the first signal, and eliminating the first interference signal.
- the reconstruction information of the second signal received by the second receiving module 340 further includes: a nonlinear estimation of the radio frequency channel of the second signal; and a third signal received by the second receiving unit 312.
- the reconstruction information also includes: a nonlinear estimation of the RF channel of the third signal.
- the second receiving unit 312 when the power ratio of the interference signal and the useful signal in the signal received by the terminal 300 is greater than or equal to the second threshold, and is less than or equal to the third threshold, the second receiving unit 312
- the reconstructed information of the received third signal includes: Modulated digital baseband signal and modulation scheme.
- the reconstruction information of the third signal received by the second receiving unit 312 further includes: a nonlinear estimation of the radio frequency channel of the third signal;
- the terminal 300 further includes: the second receiving module 340 And a reconstruction information for receiving the second signal sent by the second terminal, where the reconstruction information of the second signal includes a nonlinear estimation of the radio frequency channel of the second signal, and the second terminal sends the reconstruction information of the second signal.
- the interference cancellation module 330 is specifically configured to: determine, according to the reconstruction information of the second signal received by the second receiving module 340 and the channel parameter determined by the determining unit 313, the first interference signal in the first signal, And eliminate the first interference signal.
- the reconstruction information of the third signal received by the second receiving unit 312 includes: The radio frequency signal corresponding to the third signal; the terminal 300 further includes: a second receiving module 340, configured to receive reconfiguration information of the second signal sent by the second terminal, where the reconstruction information of the second signal includes the radio frequency signal corresponding to the second signal
- the resource used by the second terminal to transmit the reconstruction information of the second signal is different from the first resource; the interference cancellation module 330 is specifically configured to: determine, according to the reconstruction information of the second signal received by the second receiving module 340, and the determining unit 313
- the channel parameter determines a first interference signal in the first signal and cancels the first interference signal.
- the second receiving unit 312 of the terminal 300 may be specifically configured to: receive the reconstruction information of the third signal sent by the second terminal by using a wired connection communication mode, a device-to-device communication mode, or a wireless local area network communication mode.
- the second receiving module 340 is specifically configured to: receive the reconstruction information of the second signal sent by the second terminal by using a wired connection communication mode, a device-to-device communication mode, or a wireless local area network communication mode.
- the terminal for interference cancellation provided by the embodiment of the present invention can accurately estimate the channel parameter between the terminals according to the reconstruction information of the signal sent by the second terminal to the base station by the first resource, and the channel between the terminals The parameters are applied to the interference cancellation of the signals received at the first resource, and a better interference cancellation effect can be obtained.
- FIG. 7 shows a schematic block diagram of a terminal 400 in accordance with an embodiment of the present invention.
- the terminal 400 includes:
- the first sending module 410 is configured to send, by the second resource, a third signal to the base station, where the second resource does not have a downlink signal sent to the first terminal, and the first terminal receives the third signal generated by the third terminal.
- Second interference signal
- the second sending module 420 is configured to send, to the first terminal, the reconstruction information of the third signal, so as to facilitate The first terminal determines, according to the reconstruction information of the third signal and the second interference signal, a channel parameter of the receiving antenna of the terminal to the receiving antenna of the first terminal, where the resource used by the terminal to transmit the reconstruction information of the third signal is Two resources are different;
- the third sending module 430 is configured to send, by the first resource, a second signal to the base station, where the first resource receives the first signal, where the first signal includes: the first interference signal and the useful signal from the base station,
- An interference signal is an interference signal generated by the terminal transmitting the second signal to the base station by the first resource.
- the terminal provided by the embodiment of the present invention, by transmitting, to the first terminal, the reconstruction information of the signal sent by the terminal to the base station in the second resource, so that the first terminal can estimate the channel parameter between the terminals, and apply the channel parameter.
- the interference cancellation of the signal received at the first resource enables the cancellation of the interference signal between the terminals for the signal received at the first resource.
- the reconstruction information of the third signal sent by the second sending module 420 includes: an unmodulated digital baseband signal corresponding to the third signal, and a modulation mode.
- the terminal 400 further includes: a fourth sending module. 440.
- the reconstruction information of the second signal sent by the fourth sending module 440 further includes: a nonlinear estimation of the radio frequency channel of the second signal; and a third signal sent by the second sending module 420.
- the reconstruction information also includes: a nonlinear estimation of the RF channel of the third signal.
- the reconstruction information of the third signal sent by the second sending module 420 includes: an unmodulated digital baseband signal corresponding to the third signal, and a modulation mode.
- the reconstruction information of the third signal sent by the second sending module 420 further includes: a nonlinear estimation of the radio frequency channel of the third signal; the terminal 400 further includes: a fourth sending module 440, configured to send to the first terminal
- the reconstruction information of the second signal, the reconstruction information of the second signal includes a nonlinear estimation of the radio frequency channel of the second signal.
- the reconstruction information of the third signal sent by the second sending module 420 includes: a radio frequency signal corresponding to the third signal; the terminal 400 further includes: a fourth sending module 440, configured to The terminal transmits information of the third signal, and the information of the third signal includes the radio frequency signal corresponding to the third signal.
- the second sending module 420 may be specifically configured to: send the reconstruction information of the third signal to the first terminal by using a wired connection communication mode, a device-to-device communication mode, or a wireless local area network communication mode.
- the fourth sending module 440 can be specifically configured to: through a wired connection communication mode, device pairing In the standby communication mode or the wireless local area network communication mode, the reconstruction information of the second signal is sent to the first terminal. Therefore, the terminal provided by the embodiment of the present invention, by transmitting, to the first terminal, the reconstruction information of the signal sent by the terminal to the base station in the second resource, so that the first terminal can estimate the channel parameter between the terminals, and apply the channel parameter.
- the interference cancellation of the signal received at the first resource enables the cancellation of the interference signal between the terminals for the signal received at the first resource.
- FIG. 8 shows a schematic block diagram of a terminal 500 in accordance with another embodiment of the present invention.
- the terminal 500 includes a processor 510, a receiver 520, a memory 530, and a bus 540.
- the processor 510, the receiver 520, and the memory 530 are connected by a bus system 540 for storing instructions for executing instructions stored by the memory 530.
- the receiver 520 is configured to:
- the first signal is received by the first resource, where the first signal includes: a first interference signal and a useful signal from the base station, where the first interference signal is an interference signal generated by the second terminal transmitting the second signal to the base station by the first resource;
- Processor 510 is used to:
- the terminal provided by the embodiment of the present invention can perform the cancellation of the interference signal between the terminals on the signal received by the first resource according to the channel parameter of the transmitting antenna of the second terminal to the receiving antenna of the terminal 300.
- the processor 510 may be a central processing unit (CPU,
- the processor 510 can also be other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or Transistor logic devices, discrete hardware components, etc.
- DSPs digital signal processors
- ASICs application specific integrated circuits
- FPGAs off-the-shelf programmable gate arrays
- the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
- the memory 530 can include read only memory and random access memory and provides instructions and data to the processor 510.
- a portion of memory 530 may also include non-volatile random access memory.
- the memory 530 can also store information of the device type.
- the bus system 540 can include, in addition to the data bus, a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 540 in the figure.
- each step of the above method may be integrated by hardware in the processor 510.
- the logic circuit or the instruction in the form of software is completed.
- the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
- the software modules 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 530.
- the processor 510 reads the information in the memory 530 and completes the steps of the above method in combination with the hardware. To avoid repetition, it will not be described in detail here.
- the processor 510 determines channel parameters of the transmit antenna of the second terminal to the receive antenna of the terminal 500, including:
- the second interference signal is an interference signal generated by the second terminal transmitting the third signal to the base station, where the second resource does not have a downlink signal sent to the terminal 500;
- the channel parameters of the transmit antenna of the second terminal to the receive antenna of the terminal 500 are determined based on the reconstructed information of the second interference signal and the third signal.
- the reconstruction information of the third signal includes: An unmodulated digital baseband signal and a modulation method corresponding to the three signals;
- the receiver 520 is further configured to:
- the second terminal And receiving, by the second terminal, the reconstruction information of the second signal, where the reconstruction information of the second signal includes an unmodulated digital baseband signal and a modulation mode corresponding to the second signal, and the second terminal sends the reconstruction information of the second signal.
- the resources used are different from the first resources;
- the processor 510 is also specifically configured to:
- the reconstruction information of the second signal further includes: a nonlinear estimation of the radio frequency channel of the second signal; and the reconstruction information of the third signal further includes: the radio frequency channel of the third signal Nonlinear estimation.
- the power ratio of the interference signal and the useful signal is greater than or equal to the second threshold, and is less than or equal to the third threshold.
- the reconstruction information of the third signal includes: an unmodulated digital baseband signal corresponding to the third signal and a modulation mode.
- the reconstruction information of the third signal further includes: a nonlinear estimation of the radio frequency channel of the third signal;
- the receiver 520 is further configured to:
- the processor 510 is also specifically configured to:
- the reconstruction information of the third signal includes: the radio frequency signal corresponding to the third signal ;
- the receiver 520 is further configured to:
- the reconstruction information of the second signal includes the radio frequency signal corresponding to the second signal, and the resource used by the second terminal to transmit the reconstruction information of the second signal is different from the first resource ;
- the processor 510 is also specifically configured to:
- the receiver 520 receives the reconstruction information of the second signal sent by the second terminal and/or the reconstruction information of the third signal sent by the second terminal may be through a wired connection communication manner, a device-to-device communication manner, or a wireless local area network.
- the communication mode is not limited in this embodiment of the present invention.
- the main body of the method may also correspond to the terminal 300 according to an embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the terminal 500 are for implementing the corresponding processes of the methods of FIG. 2 and FIG. , will not repeat them here.
- the terminal for interference cancellation provided by the embodiment of the present invention is first according to the second terminal.
- the reconstruction information of the signal transmitted by the resource to the base station can accurately estimate the channel parameters between the terminals, and apply the channel parameters between the terminals to the interference cancellation of the signal received at the first resource, so that better interference cancellation can be obtained. effect.
- FIG. 9 shows a schematic block diagram of a terminal 600 in accordance with another embodiment of the present invention.
- the terminal 600 includes a processor 610, a transmitter 620, a memory 630, and a bus 640.
- the processor 610, the transmitter 620, and the memory 630 are connected by a bus system 640 for storing instructions for executing instructions stored by the memory 630.
- the transmitter 620 is configured to:
- Transmitting the reconstruction information of the third signal to the first terminal so that the first terminal determines, according to the reconstruction information of the third signal and the second interference signal, a channel parameter of the transmitting antenna of the terminal 600 to the receiving antenna of the first terminal, where The resource used by the terminal 600 to transmit the reconstruction information of the third signal is different from the second resource;
- the terminal provided by the embodiment of the present invention, by transmitting, to the first terminal, the reconstruction information of the signal sent by the terminal to the base station in the second resource, so that the first terminal can estimate the channel parameter between the terminals, and apply the channel parameter.
- the interference cancellation of the signal received at the first resource enables the cancellation of the interference signal between the terminals for the signal received at the first resource.
- the processor 610 may be a central processing unit (CPU), and the processor 610 may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and more.
- the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
- the memory 630 can include read only memory and random access memory and provides instructions and data to the processor 610.
- a portion of memory 630 may also include non-volatile random access memory.
- the memory 630 can also store information of the device type.
- the bus system 640 can include a power bus and a control bus in addition to the data bus. And status signal bus, etc. However, for clarity of description, various buses are labeled as bus system 640 in the figure.
- each step of the above method may be completed by an integrated logic circuit of hardware in the processor 610 or an instruction in the form of software.
- the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
- the software modules can be located in random memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, etc., which are well established in the art.
- the storage medium is located in the memory 630, and the processor 610 reads the information in the memory 630 and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.
- the reconstruction information of the third signal sent by the transmitter 620 includes: an unmodulated digital baseband signal and a modulation mode corresponding to the third signal; the transmitter 620 is further configured to: go to the first terminal The reconstruction information of the second signal is sent, and the reconstruction information of the second signal includes an unmodulated digital baseband signal and a modulation mode corresponding to the second signal.
- the reconstruction information of the second signal sent by the transmitter 620 further includes: a nonlinear estimation of the radio frequency channel of the second signal; and reconstruction of the third signal sent by the transmitter 620
- the information also includes: a nonlinear estimate of the RF channel of the third signal.
- the reconstruction information of the third signal sent by the transmitter 620 includes: an unmodulated digital baseband signal corresponding to the third signal and a modulation mode.
- the reconstruction information of the third signal sent by the transmitter 620 further includes: a nonlinear estimation of the radio frequency channel of the third signal; the transmitter 620 is further configured to: go to the first terminal The reconstruction information of the second signal is transmitted, and the reconstruction information of the second signal includes a nonlinear estimation of the radio frequency channel of the second signal.
- the reconstruction information of the third signal sent by the transmitter 620 includes: a radio frequency signal corresponding to the third signal; and the transmitter 620 is further configured to:
- the reconstruction information of the second signal is sent to the first terminal, and the reconstruction information of the second signal includes the radio frequency signal corresponding to the second signal.
- the transmitter 620 sends the reconstruction information of the third signal to the first terminal and/or the reconstruction information of the second signal to the first terminal, and may be a wired connection communication manner, a device-to-device communication manner, or a wireless local area network communication.
- the embodiment of the present invention does not limit this.
- the body of the method may also correspond to the terminal 400 according to an embodiment of the present invention, and the terminal 600.
- the terminal provided by the embodiment of the present invention, by transmitting, to the first terminal, the reconstruction information of the signal sent by the terminal to the base station in the second resource, so that the first terminal can estimate the channel parameter between the terminals, and apply the channel parameter.
- the interference cancellation of the signal received at the first resource enables the cancellation of the interference signal between the terminals for the signal received at the first resource.
- the disclosed systems, devices, and methods may be implemented in other ways.
- 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 connection or communication connection shown or discussed may be an indirect connection or communication connection through some interface, device or unit, or may be an electrical, mechanical or other form. connection.
- the components displayed for the unit may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units.
- each functional unit in each embodiment of the present invention 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 above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
- the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
- the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
- a number of instructions are included 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 invention.
- the foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like. The medium of the code.
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Abstract
本发明公开了一种用于干扰消除的方法和终端,该方法包括:第一终端确定第二终端的发射天线到第一终端的接收天线的信道参数;第一终端在第一资源接收第一信号,第一信号包括:第一干扰信号和来自基站的有用信号,第一干扰信号为第二终端在第一资源向基站发送第二信号产生的干扰信号;第一终端根据信道参数,确定第一信号中的第一干扰信号,并消除第一干扰信号。本发明实施例的用于干扰消除的方法和终端,通过根据干扰终端与被干扰终端间的信道参数,能够实现对在被干扰终端接收的信号进行终端间的干扰信号的消除。
Description
用于干扰消除的方法和终端 技术领域
本发明实施例涉及通信技术领域, 并且更具体地, 涉及用于干扰消除的 方法和终端。 背景技术
在移动蜂窝通信系统、 无线局域网 (WLAN, Wireless Local Area Network ), 固定无线接入 ( FWA, Fixed Wireless Access )等无线通信系统 中, 基站(BS, Base Station )或接入点 (AP, Access Point )、 中继站(RS, Relay Station )以及用户设备( UE, User Equipment )等通信节点通常具有发 射自身信号和接收其它通信节点信号的能力。 由于无线信号在无线信道中的 衰减非常大, 与自身的发射信号相比, 来自通信对端的信号到达接收端时信 号已非常微弱, 例如, 移动蜂窝通信系统中一个通信节点的收发信号功率差 达到 80dB~140dB甚至更大, 因此, 为了避免同一收发信机的发射信号对接 收信号的自干扰,无线信号的发送和接收通常釆用不同的频段或时间段加以 区分。 例如, 在频分双工(FDD, Frequency Division Duplex ) 中, 发送和接 收使用相隔一定保护频带的不同频段进行通信, 在时分双工 (TDD, Time Division Duplex ) 中, 发送和接收则使用相隔一定保护时间间隔的不同时间 段进行通信, 其中, FDD系统中的保护频带和 TDD系统中的保护时间间隔 都是为了保证接收和发送之间充分地隔离, 避免发送对接收造成干扰。
无线全双工技术不同于现有的 FDD或 TDD技术,可以在相同无线信道 上同时进行接收与发送操作, 这样, 理论上无线全双工技术的频谱效率是 FDD或 TDD技术的两倍。显然, 实现无线全双工的前提在于尽可能地避免、 降低与消除同一收发信机的发射信号对接收信号的强干扰(称为自干扰, Self-interference ), 使之不对有用信号的正确接收造成影响。
根据以上描述,现有的无线全双工系统的干扰消除的研究多围绕消除各 通信节点的自干扰信号展开。 但这是基于理想的点对点的全双工通信场景 的, 在一点对多点的通信场景中, 一个终端的上行信号可能会对另一个终端 的下行信号的接收产生干扰, 使得被干扰的终端无法正确接收有用信号。
发明内容
本发明实施例提供一种用于干扰消除的方法和终端, 能够对接收到的信 号中的终端间的干扰信号进行消除。
第一方面提供了一种用于干扰消除的方法, 该方法包括: 第一终端确定 第二终端的发射天线到第一终端的接收天线的信道参数; 第一终端在第一资 源接收第一信号, 第一信号包括: 第一干扰信号和来自基站的有用信号, 第 一干扰信号为第二终端在第一资源向基站发送第二信号产生的干扰信号; 第 一终端根据信道参数, 确定第一信号中的第一干扰信号, 并消除第一干扰信 号。
第二方面提供了一种用于干扰消除的方法, 该方法包括: 第二终端在第 二资源向基站发送第三信号, 其中, 在第二资源不存在向第一终端发送的下 行信号, 第一终端在第二资源接收由第三信号产生的第二干扰信号; 第二终 端向第一终端发送第三信号的重构信息, 以便于第一终端根据第三信号的重 构信息和第二干扰信号,确定第二终端的发射天线到第一终端的接收天线的 信道参数, 其中, 第二终端发送第三信号的重构信息所使用的资源与第二资 源不同; 第二终端在第一资源向基站发送第二信号, 其中, 在第一资源第一 终端接收第一信号, 第一信号包括: 第一干扰信号和来自基站的有用信号, 第一干扰信号为第二终端在第一资源向基站发送第二信号产生的干扰信号。
第三方面提供了一种终端, 该终端包括: 确定模块 310, 用于确定第二 终端的发射天线到终端的接收天线的信道参数; 第一接收模块 320, 用于在 第一资源接收第一信号, 第一信号包括: 第一干扰信号和来自基站的有用信 号, 第一干扰信号为第二终端在第一资源向基站发送第二信号产生的干扰信 号; 干扰消除模块 330, 用于根据确定模块 310确定的信道参数, 确定第一 接收模块 320接收的第一信号中的第一干扰信号, 并消除第一干扰信号。
第四方面提供了一种终端, 该终端包括: 第一发送模块 410, 用于在第 二资源向基站发送第三信号, 其中, 在第二资源不存在向第一终端发送的下 行信号, 第一终端在第二资源接收由第三信号产生的第二干扰信号; 第二发 送模块 420, 用于向第一终端发送第三信号的重构信息, 以便于第一终端根 据第三信号的重构信息和第二干扰信号,确定终端的发射天线到第一终端的 接收天线的信道参数, 其中, 终端发送第三信号的重构信息所使用的资源与 第二资源不同; 第三发送模块 430, 用于在第一资源向基站发送第二信号,
其中, 在第一资源第一终端接收第一信号, 第一信号包括: 第一干扰信号和 来自基站的有用信号, 第一干扰信号为终端在第一资源向基站发送第二信号 产生的干扰信号。
基于上述技术方案, 本发明实施例提供的用于干扰消除的方法和终端, 通过根据干扰终端与被干扰终端间的信道参数, 能够实现对在被干扰终端接 收的信号进行终端间的干扰信号的消除。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对本发明实施例或 现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面所描述 的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付 出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1是应用本发明实施例的用于干扰消除的方法的一个场景的示意图。 图 2是根据本发明一个实施例的用于干扰消除的方法的示意性流程图。 图 3 是根据本发明另一个实施例的用于干扰消除的方法的示意性流程 图。
图 4 是根据本发明另一个实施例的用于干扰消除的方法的示意性流程 图。
图 5是根据本发明一个实施例的终端的示意性框图。
图 6是根据本发明一个实施例的确定模块的示意性框图。
图 7是根据本发明另一个实施例的终端的示意性框图。
图 8是根据本发明另一个实施例的终端的示意性框图。
图 9是根据本发明另一个实施例的终端的示意性框图。 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例是本发明的一部分实施例, 而不 是全部实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创 造性劳动的前提下所获得的所有其他实施例, 都应属于本发明保护的范围。
图 1示出了应用本发明实施例的用于干扰消除的方法的一个场景的示意 图。 在如图 1所示的场景中, 一个基站和两个终端进行通信。 如果基站具有
全双工通信能力, 两个终端只具有 TDD或 FDD通信能力, 则有可能第二终 端发送上行信号和第一终端接收下行信号所使用的时频资源是相同的。如果 基站和两个终端均具有全双工通信能力, 则也有可能第二终端发送上行信号 和第一终端接收下行信号所使用的时频资源是相同的。 在上述两种情况下, 发送上行信号的第二终端将会对接收下行信号的第一终端产生干扰,使得第 一终端无法正确接收来自基站的有用信号。本发明实施例提供了针对如上所 述的终端间的干扰信号进行干扰消除的方案。
下面结合相关公式, 对本发明实施例方案的原理进行简单说明。 假设两 个终端和一个基站利用相同的时频资源进行全双工通信,被干扰的终端同时 接收到来自另一终端的干扰信号和来自基站发送的有用信号,其接收到的信 号; y可以表示为:
~ ^self Xself + ^BS XBS + ^UE XUE + 其中, hself 、 hss和 分别为自干 4尤信道、 通信信道和终端间干 4尤信道 的信道参数, xself 、 ^和 ^分别为该终端发送的信号、 基站发送的信号和 小区内的产生干扰的终端发送的信号。 由上述表达式可以看出, 要在信号) 中获得基站发送的有用信号, 需要将干扰部分 和 消除。 其中 消除 h^ x^ , 即自干扰信号, 不在本发明实施例中进行说明, 仅讨论终端 间的干扰信号 的消除。要将该终端间的干扰信号进行消除,我们需要 获得终端间信道参数 hra和产生干扰的终端发送的信号 Xt/£。 其中, hra可以 通过信道估计或其他方法获得, xra可以从产生干扰的终端获得或者通过估 算获得。为了描述方便, 下文中将被干扰终端接收到的信号中的! 部分 称为干扰信号, 例如第一干扰信号、 第二干扰信号。
应理解, 在本发明实施例中, 终端即釆用无线全双工技术或无线半双工 技术的接入终端, 也可以称为系统、 用户单元、 用户站、 移动站、 移动台、 远方站、 远程终端、 移动设备、 用户终端、 终端、 无线通信设备、 用户代理、 用户装置或用户设备(UE, User Equipment )。 终端可以是蜂窝电话、 无绳 电话、 SIP ( Session Initiation Protocol, 会话启动十办议)电话、 WLL ( Wireless Local Loop, 无线本地环路)站、 PDA ( Personal Digital Assistant, 个人数字 处理)、 具有无线通信功能的手持设备、 车载设备、 计算设备或连接到无线 调制解调器的其它处理设备。
还应理解, 在本发明实施例中, 基站可用于与移动设备通信, 基站可以
是 Wi-Fi的 AP ( Access Point, 无线接入点), 或者是 GSM ( Global System of Mobile communication, 全球移动通讯 )或 CDMA ( Code Division Multiple Access, 码分多址) 中的 BTS ( Base Transceiver Station, 基站), 也可以是 WCDMA ( Wideband Code Division Multiple Access, 宽带码分多址)中的 NB ( NodeB,基站),还可以是 LTE ( Long Term Evolution,长期演进)中的 eNB 或 eNodeB ( Evolutional Node B, 演进型基站), 或者中继站或接入点, 或者 未来 5G网络中的基站设备等。
还应理解, 图 1所示的仅为应用本发明实施例的用于干扰消除的方法的 一个典型场景,在应用的场景中还可以包括类似于第一终端或第二终端的多 个终端, 本发明实施例对此不作限定。
图 2示出了根据本发明一个实施例的用于干扰消除的方法 100, 该方法 100可以由被干扰终端, 即第一终端执行。 如图 2所示, 该方法 100包括:
5110,第一终端确定第二终端的发射天线到第一终端的接收天线的信道 参数;
S120, 第一终端在第一资源接收第一信号, 第一信号包括: 第一干扰信 号和来自基站的有用信号, 第一干扰信号为第二终端在第一资源向基站发送 第二信号产生的干扰信号;
S130, 第一终端根据信道参数, 确定第一信号中的第一干扰信号, 并消 除第一干扰信号。
因此, 本发明实施例提供的用于干扰消除的方法, 第一终端根据第二终 端的发射天线到第一终端的接收天线的信道参数, 能够实现对在第一资源接 收的信号进行终端间的干扰信号的消除。
在 S110中, 第一终端确定第二终端的发射天线到第一终端的接收天线 的信道参数可以有多种。 可选地, 如图 3所示, 作为一个实施例, S110可以 包括:
5111 , 第一终端在第二资源接收第二干扰信号, 第二干扰信号为第二终 端在第二资源向基站发送第三信号产生的干扰信号, 其中, 在第二资源不存 在向第一终端发送的下行信号;
5112, 第一终端接收第二终端发送的第三信号的重构信息, 第二终端发 送第三信号的重构信息所使用的资源与第二资源不同;
5113 , 第一终端根据第二干扰信号和第三信号的重构信息, 确定第二终
端的发射天线到第一终端的接收天线的信道参数。
由于在第二资源, 不存在向第一终端发送的下行信号, 即基站不向第一 终端发送信号, 如果在第二资源第一终端不向外发送信号, 那么第一终端所 接收到的信号可以近似地认为是第二终端发送第三信号产生的第二干扰信 号。 通过第三信号的重构信息可以重构获得第三信号, 进而可以根据该第二 干扰信号和重构获得的第三信号,估算出第二终端的发送天线到第一终端的 接收天线的信道参数, 如幅度与相位等。
应理解, 如果在第二资源, 第一终端在接收第二干扰信号的同时还向外 发送信号, 则在估算信道参数时, 可以首先对接收的信号进行自干扰消除。 自干扰消除后的残余信号可以近似认为是第二干扰信号, 本发明实施例对此 不作限定。
可选地, 还可以对上述实施例作一些变化, 来实现确定第二终端的发射 天线到第一终端的接收天线的信道参数。 例如, 第二终端在第二资源发送的 第三信号是第一终端与第二终端提前约定好的一个固定的信号。该第三信号 仅用于测试两终端间的信道参数, 不是向基站发送的上行信号。 在这种情况 下, 由于第三信号是提前约定好的固定的信号, 第二终端不需再向第一终端 发送第三信号的重构信息,但需要为两个终端分配专门用于估算信道参数的 时频资源。 S111至 S113的方案相比于为两个终端分配专门用于估算信道参 数的资源而言, 可以在很大的程度上节省资源的开销。 在本发明实施例中, 估算终端间的信道参数, 本发明实施例对此不作限定。
可选地, 作为一个具体实施例, 当第一终端接收到的信号中干扰信号和 有用信号的功率比值大于第一阔值, 并且小于第二阔值时, 第三信号的重构 信息包括: 第三信号对应的未经调制的数字基带信号和调制方式; 在第一终 端根据信道参数, 确定第一信号中的第一干扰信号, 并消除第一干扰信号之 前, 方法 100还包括: 第一终端接收第二终端发送的第二信号的重构信息, 第二信号的重构信息包括第二信号对应的未经调制的数字基带信号和调制 方式, 第二终端发送第二信号的重构信息所使用的资源与第一资源不同; 第 一终端根据信道参数, 确定第一信号中的第一干扰信号, 并消除第一干扰信 号, 包括: 第一终端根据第二信号的重构信息和信道参数, 确定第一信号中 的第一干扰信号, 并消除第一干扰信号。
应理解,第一阔值的倒数可以是受到干扰的第一终端在不需要进行终端
间干扰消除的情况下, 可以正确估算出有用信号所需要的信噪比。 第二阔值 的倒数可以是受到干扰的第一终端可以正确估算出有用信号所需要的信噪 比。 例如, 产生相互干扰的第一终端和第二终端间距离较远(几十米) 时, 两终端间的干扰信号和有用信号的功率比通常较小, ΙΡ)Ι<10(1Β。 在这种情 况下,被干扰的第一终端在第二时频资源无法从接收到的第一信号中正确估 算出基站发送的有用信号或第二终端发送的第二信号。
在 S111 中, 第二资源是第一终端用于估算终端间信道参数的资源。 第 一终端将接收到的第二干扰信号通过低噪声放大器 (LNA, Low Noise Amplifier ), 下变频及模拟数字变换器(ADC, Analog-to-Digital Converter ) 等处理后, 可以获得第二干扰信号对应的数字基带信号。
在 S112中, 第一终端可以通过带外资源接收第二终端发送的第三信号 的重构信息, 该第三信号的重构信息包括第三信号对应的未经调制的数字基 带信号和调制方式。 其中, 带外资源是指预先设定的基站和终端进行通信的 时频资源以外的资源, 例如第二终端可以通过有线连接通信方式、 设备对设 备通信方式或无线局域网等通信方式向第一终端发送第三信号的重构信息。 第二终端向第一终端发送第三信号的重构信息与向基站发送第三信号可以 是同时的; 第二终端也可以在向基站发送第三信号之前, 提前向第一终端发 送第三信号的重构信息。 以上举措可以使得第一终端在接收到第二干扰信号 后,及时地根据第三信号的重构信息,进行信道参数的估算,避免产生时延。
在 S113 中, 第一终端可以根据第三信号对应的未经调制的数字基带信 号和调制方式, 重构得到第二终端在第二资源向基站发送的第三信号。 该重 构获得的第三信号为经过调制的数字基带信号。根据第二干扰信号对应的数 字基带信号和重构获得的第三信号, 可以估算出第二终端的发送天线到第一 终端的接收天线的信道参数。 一般而言, 终端的相对位置及所处的环境在一 段时间内是保持不变的,可以认为在一段时间内,该信道参数是保持不变的, 因此该信道参数可以用于与第二资源时间相近的第一资源的终端间的干扰 消除。
在 S120中, 第一资源是第一终端需要进行终端间干扰消除的资源。 在 第一资源, 第一终端接收的第一信号包括: 第一干扰信号和来自基站的有用 信号, 第一干扰信号为第二终端在第一资源向基站发送第二信号产生的干扰 信号。 终端间干扰消除是为了将第一干扰信号消除。 第一终端可以将接收到
的第一信号通过 LNA、 下变频及 ADC等处理获得第一信号对应的数字基带 信号。
在 S130之前, 方法 100还包括: 第一终端通过带外资源接收第二终端 发送的第二信号的重构信息, 第二信号的重构信息包括第二信号对应的未经 调制的数字基带信号和调制方式。与获得第二终端的发送天线到第一终端的 接收天线的信道参数同理, 为了及时进行干扰消除, 避免产生时延, 第二终 端向第一终端发送第二信号的重构信息与向基站发送第二信号可以是同时 的; 第二终端也可以在向基站发送第二信号之前, 提前向第一终端发送第二 信号的重构信息。
在 S130中, 第一终端可以根据第二信号对应的未经调制的数字基带信 号和调制方式, 重构得到第二终端在第一资源向终端发送的下行的第二信 号, 该重构获得的第二信号为经过调制的数字基带信号。 根据该重构获得的 第二信号和在 S113 中获得的信道参数, 可以确定第一终端在第一资源接收 到的第一干扰信号。可以将该第一信号对应的数字基带信号中的第一干扰信 号消除, 进而获得第一信号中的有用信号对应的数字基带信号。
应理解, 在本发明实施例中, 第一终端也可以不重构第二信号, 直接根 据第二信号的重构信息和在 S113 中获得的信道参数估算出第一终端在第二 资源接收到的第一信号中的第一干扰信号, 本发明实施例对此不作限定。
还应理解, 如果第一终端在第一资源还对外发送信号, 则在进行终端间 数字干扰消除之前, 还可以对第一信号进行自干扰消除, 本发明实施例对此 不作限定。
在本发明实施例中, 重构第二信号和第三信号是指重构第二信号和第三 信号的经过调制的数字基带信号, 除根据未经调制的数字基带信号和调制方 式重构获得以外, 还可以直接从第二终端获取经过调制的数字基带信号。
此外, 在估算信道参数和进行干扰消除时, 如果第二终端估计到射频通 道线性度不足, 还需要向第一终端发送射频通道的非线性估计。 相应地, 第 二信号的重构信息还包括: 第二信号的射频通道的非线性估计; 第三信号的 重构信息还包括: 第三信号的射频通道的非线性估计。
可选地, 作为另一个具体实施例, 当第一终端接收到的信号中干扰信号 和有用信号的功率比值大于或者等于第二阔值, 并且小于或者等于第三阔值 时, 第三信号的重构信息包括: 第三信号对应的未经调制的数字基带信号和
调制方式。
应理解,第二阔值的倒数可以是受到干扰的第一终端可以正确估算出有 用信号所需要的信噪比。 第三阔值可以是不影响接收天线正常接收数字有用 信号所能容忍的最大功率比。 例如, 产生相互干扰的第一终端和第二终端间 的距离较近 (几米), 而终端距离基站较远 (几百米)时, 两终端间的干扰信号 和有用信号的功率比较大, 1^1约为 20 ~ 30dB。 在这种情况下, 被干扰的第 一终端通过信道估计获得终端间干扰信道的信道参数后,便可以通过估算获 得第二终端发送的第三信号。
在本具体实施例中,获得第二终端的发送天线到第一终端的接收天线的 信道参数的方法可以与上一实施例 S111至 S113中描述的获取方法相类似; 接收第一信号及对第一信号的处理也与上一实施例 S120中描述的方法相类 似, 在此不再赘述。
在 S130中, 第一终端可以根据第二信号对应的未经调制的数字基带信 号和调制方式, 重构得到第二终端在第一资源向终端发送的下行的第二信 号, 该重构获得的第二信号为经过调制的数字基带信号。 由于两终端间距离 较近而终端距离基站较远, 第一终端在第一资源接收到的第一信号中的第一 干扰信号部分非常强, 可以根据在 S113 中获得的信道参数, 较为精确的计 算出第二信号。 进而可以确定第一信号中的第一干扰信号。 可以将第一信号 对应的数字基带信号中的第一干扰信号消除, 进而获得第一信号中的有用信 号对应的数字基带信号。 同理, 也可以对第一信号进行自干扰消除, 本发明 实施例对此不作限定。
此外, 在估算信道参数和进行干扰消除时, 如果第二终端估计到射频通 道线性度不足, 还需要向第一终端发送射频通道的非线性估计。 相应地, 第 三信号的重构信息还包括: 第三信号的射频通道的非线性估计; 在第一终端 根据信道参数,确定第一信号中的第一干扰信号,并消除第一干扰信号之前, 该方法还包括: 第一终端接收第二终端发送的第二信号的重构信息, 第二信 号的重构信息包括第二信号的射频通道的非线性估计, 第二终端发送第二信 号的重构信息所使用的资源与第一资源不同; 第一终端根据信道参数, 确定 第一信号中的第一干扰信号, 并消除第一干扰信号, 包括: 第一终端根据第 二信号的重构信息和信道参数, 确定第一信号中的第一干扰信号, 并消除第 一干扰信号。
可选地, 作为又一个具体实施例, 当第一终端接收到的信号中干扰信号 和有用信号的功率比值大于第三阔值时, 第三信号的重构信息包括: 第三信 号对应的射频信号; 在第一终端根据信道参数, 确定第一信号中的第一干扰 信号, 并消除第一干扰信号之前, 该方法还包括: 第一终端接收第二终端发 送的第二信号的重构信息, 第二信号的重构信息包括第二信号对应的射频信 号, 第二终端发送第二信号的重构信息所使用的资源与第一资源不同; 第一 终端根据信道参数,确定第一信号中的第一干扰信号,并消除第一干扰信号, 包括: 第一终端根据第二信号的重构信息和信道参数, 确定第一信号中的第 一干扰信号, 并消除第一干扰信号。
应理解,第三阔值可以是不影响接收天线正常接收数字有用信号所能容 忍的最大功率比。 例如, 产生相互干扰的第一终端和第二终端间的距离非常 近( 0 ~ 30厘米) 时, 两终端间的干扰信号和有用信号之间的功率比较大, 约为 PDI〉40dB。 在这种情况下, 对接收到的信号进行射频自干扰消除后得 到的残留的模拟信号的动态范围较大, 可能使得在模拟数字变换器(ADC, Analog-to-Digital Converter )将残留的模拟信号转换为数字基带信号时, 出 现无法正确量化残留的模拟信号中的有用信号的情况, 因而需要进行终端间 射频干扰消除, 进而再进行终端间数字干扰消除。
在本具体实施例中, S 111和 S 120中描述的方法与前两个具体实施例中 对应的方法相类似, 在此不再赘述。
在 S112中, 第一终端可以通过带外资源接收第二终端发送的第三信号 的重构信息, 该第三信号的重构信息包括第三信号对应的射频信号。 同理, 第二终端向第一终端发送第三信号的重构信息与其向基站发送第三信号可 以是同时的; 也可以在向基站发送第三信号之前, 提前向第一终端发送第三 信号的重构信息。
在 S113 中, 第一终端可以将该第三信号对应的射频信号通过下变频、 低通滤波器(LPF, Low Pass Filter )和 ADC处理获得第三信号对应的数字 基带信号, 即重构出第三信号对应的数字基带信号。 进而可以根据第二干扰 信号对应的数字基带信号和重构获得的第三信号对应的数字基带信号,估算 出第二终端的发送天线到第一终端的接收天线的信道参数。
在 S130之前, 方法 100还包括: 第一终端接收第二终端发送的第二信 号的重构信息, 第二信号的重构信息包括第二信号对应的射频信号, 第二终
端发送第二信号的重构信息所使用的资源与第一资源不同。 同理, 第二终端 向第一终端发送第二信号的重构信息与向基站发送第二信号可以是同时的; 也可以在向基站发送第二信号之前,提前向第一终端发送第二信号的重构信 息。
在 S130中,第一终端根据第一信号对应的射频信号和在 S113中获得的 信道参数, 重构出第一干扰信号对应的射频信号, 从而对第一信号进行终端 间射频干扰消除, 这可以看作是第一级终端间干扰消除。 将第一信号经过终 端间射频干扰消除的残余信号通过下变频、 LPF和 ADC处理, 获得相应的 数字基带信号。 并将第二信号对应的射频信号通过下变频、 LPF和 ADC处 理获得相应的数字基带信号。 通过第二信号的数字基带信号和 S113 中获得 的信道参数重构出第一干扰信号对应的数字基带信号,从而对第一信号的数 字基带信号进行终端间数字干扰消除, 这可以看作是第二级终端间干扰消 除。
应理解, 如果在第一资源在第一资源还对外发送信号, 则在进行终端间 干扰消除之前, 还可以对第一信号进行自干扰消除, 本发明实施例对此不作 限定。这里所说的自干扰消除包括在进行终端间射频干扰消除之前进行射频 自干扰消除, 以及在进行终端间数字干扰消除之前进行数字自干扰消除。
优选地,第一终端接收第二终端发送的第二信号对应的射频信号和 /或第 三信号对应的射频信号, 可以通过有线连接通信方式接收。 通过有线连接通 信方式, 可以防止第二信号对应的射频信号或第三信号对应的射频信号受到 其他射频信号的干扰。
应理解, 在本发明各实施例中, 第一终端接收第二终端发送的第一信号 的信息和 /或第一终端接收第二终端发送的第三信号的信息可以通过有线连 接通信方式、 设备对设备(D2D, Device to Device )通信方式或无线局域网 ( Wi-Fi, Wireless Fidelity )通信方式等直接通信的方式。 釆用以上直接通信 的方式,其使用的资源是基站为第一终端分配的时频资源以外的资源。因而, 第一终端可以将在基站为其分配的资源上接收到的信号与第一信号的信息 / 第三信号的信息区分开来。 在本发明实施例中, 还可以通过其他可实现的直 接通信方式, 本发明实施例对此不作限定。
还应理解, 只要符合估算信道参数的条件的资源, 均可以作为第二资源 用来估算信道参数, 因而可以实时地测量终端间的信道参数, 以便于获得最
新的终端间的信道信息,使得在第一资源进行终端间干扰消除时所使用的信 道参数更准确, 可以达到更好的干扰消除效果。
还应理解, 本发明实施例中, 确定第一终端接收到的信号中干扰信号和 有用信号的功率比值可以有多种方法, 本发明实施例对此不作限定。 其中, 第一终端接收到的信号中干扰信号,是指第一终端接收到的信号中由于第二 终端向基站发送信号所产生的干扰信号; 第一终端接收到的信号中的有用信 号, 是指第一终端接收的来自基站的有用信号。
在本发明实施例中,可以通过估算第一终端和第二终端的距离以及终端 和基站间的距离来确定干扰信号和有用信号功率比值。还可以通过第一终端 在第三资源接收到干扰信号的功率以及第一终端在第四资源接收到的信号 的功率(该功率为干扰信号和有用信号的和)来确定功率比值; 其中在第三 资源不存在向第一终端发送的下行信号, 第二终端向基站发送上行信号; 在 第四资源第一终端接收基站发送的下行信号, 第二终端向基站发送上行信 号。 在确定上述功率比值之后, 如果第一终端和第二终端所处的通信环境不 发生大的变化, 可以认为在一段时间内, 该功率比值是不变的。
因此, 本发明实施例提供的用于干扰消除的方法, 第一终端根据第二终 端在第一资源向基站发送的信号的重构信息, 可以准确地估算出终端间的信 道参数, 将该终端间的信道参数应用于对在第一资源接收的信号的干扰消 除, 可以获得更好的干扰消除效果。
应理解,在本发明实施例中,各终端对资源的使用是由基站进行调度的。 第一终端和第二终端确定估算信道参数的第二资源和进行干扰消除的第一 资源, 可以通过基站向第一终端和第二终端发送相应的指示消息; 也可以由 基站通过广播方式通知各终端资源的分配情况,使得第一终端和第二终端按 照预先的设置, 在相应的资源估算信道参数或进行干扰消除。 终端确定估算 信道参数或进行干扰消除的资源的方法还有其他一些可行的方法, 本发明实 施例对此不作限定。
还应理解, 在本发明实施例中, 干扰消除可以是消除信号中的全部干 扰分量(包括主径干扰信号和近区干扰信号), 也可以是消除信号中的 部分干扰分量 (包括主径干扰信号的一部分和近区干扰信号的一部 分)。
还应理解, 在本发明的各种实施例中, 上述各过程的序号的大小并不意
味着执行顺序的先后, 各过程的执行顺序应以其功能和内在逻辑确定, 而不 应对本发明实施例的实施过程构成任何限定。
图 4示出了根据本发明实施例的用于干扰消除的方法 200的示意性流程 图,该方法 200可以由干扰终端, 即第二终端执行。如图 4所示,该方法 200 包括:
S210, 第二终端在第二资源向基站发送第三信号, 其中, 在第二资源不 存在向第一终端发送的下行信号, 第一终端在第二资源接收由第三信号产生 的第二干扰信号;
S220, 第二终端向第一终端发送第三信号的重构信息, 以便于第一终端 根据第三信号的重构信息和第二干扰信号,确定第二终端的发射天线到第一 终端的接收天线的信道参数, 其中, 第二终端发送第三信号的重构信息所使 用的资源与第二资源不同;
S230, 第二终端在第一资源向基站发送第二信号, 其中, 在第一资源第 一终端接收第一信号,第一信号包括:第一干扰信号和来自基站的有用信号, 第一干扰信号为第二终端在第一资源向基站发送第二信号产生的干扰信号。
因此, 本发明实施例提供的用于干扰消除的方法, 通过向第一终端发送 第二终端在第二资源向基站发送的信号的重构信息,使得第一终端可以估算 出终端间的信道参数,根据该信道参数和第二终端在第一资源向基站发送的 信号的重构信息, 能够实现对在第一资源接收的信号进行终端间的干扰信号 的消除。
可选地, 作为一个实施例, 当第一终端接收到的信号中干扰信号和有用 信号的功率比值大于第一阔值, 并且小于第二阔值时, 第三信号的重构信息 包括: 第三信号对应的未经调制的数字基带信号和调制方式; 方法 200还包 括: 第二终端向第一终端发送第二信号的重构信息, 第二信号的重构信息包 括第二信号对应的未经调制的数字基带信号和调制方式。
可选地, 当射频通道线性度不足时, 第二信号的重构信息还包括: 第二 信号的射频通道的非线性估计; 第三信号的重构信息还包括: 第三信号的射 频通道的非线性估计。
可选地, 作为另一个实施例, 当第一终端接收到的信号中干扰信号和有 用信号的功率比值大于或者等于第二阔值, 并且小于或者等于第三阔值时, 第三信号的重构信息包括: 第三信号对应的未经调制的数字基带信号和调制
方式。
可选地, 当射频通道线性度不足时, 第三信号的重构信息还包括: 第三 信号的射频通道的非线性估计; 方法 200还包括: 第二终端向第一终端发送 第二信号的重构信息, 第二信号的重构信息包括第二信号的射频通道的非线 性估计。
可选地, 作为又一个实施例, 当第一终端接收到的信号中干扰信号和有 用信号的功率比值大于第三阔值时, 第三信号的重构信息包括: 第三信号对 应的射频信号; 方法 200还包括: 第二终端向第一终端发送第二信号的重构 信息, 第二信号的重构信息包括第二信号对应的射频信号。
应理解, 第二终端向第一终端发送第三信号的重构信息可以包括: 第二 终端通过有线连接通信方式、 设备对设备通信方式或无线局域网通信方式, 向第一终端发送第三信号的重构信息。
应理解, 第二终端向第一终端发送第二信号的重构信息可以包括: 第二 终端通过有线连接通信方式、 设备对设备通信方式或无线局域网通信方式, 向第一终端发送第二信号的重构信息。 在本发明实施例中, 还可以通过其他 可实现的方式进行直接通信, 本发明实施例对此不作限定。
因此, 本发明实施例提供的用于干扰消除的方法, 通过向第一终端发送 第二终端在第二资源向基站发送的信号的重构信息,使得第一终端可以估算 出终端间的信道参数,根据该信道参数和第二终端在第一资源向基站发送的 信号的重构信息, 能够实现对在第一资源接收的信号进行终端间的干扰信号 的消除。
应理解, 在本发明的各种实施例中, 上述各过程的序号的大小并不意味 着执行顺序的先后, 各过程的执行顺序应以其功能和内在逻辑确定, 而不应 对本发明实施例的实施过程构成任何限定。
上文中结合图 2至图 4, 详细描述了根据本发明实施例的用于干扰消除 的方法, 下面将结合图 5至图 7, 描述根据本发明实施例的终端。
图 5示出了根据本发明实施例的终端 300的示意性框图。 如图 5所示, 该终端 300包括:
确定模块 310, 用于确定第二终端的发射天线到终端的接收天线的信道 参数;
第一接收模块 320, 用于在第一资源接收第一信号, 第一信号包括: 第
一干扰信号和来自基站的有用信号, 第一干扰信号为第二终端在第一资源向 基站发送第二信号产生的干扰信号;
干扰消除模块 330, 用于根据确定模块 310确定的信道参数, 确定第一 接收模块 320接收的第一信号中的第一干扰信号, 并消除第一干扰信号。
因此, 本发明实施例提供的终端, 根据第二终端的发射天线到终端 300 的接收天线的信道参数, 能够实现对在第一资源接收的信号进行终端间的干 扰信号的消除。
可选地, 如图 6所示, 作为一个实施例, 确定模块 310包括:
第一接收单元 311, 用于在第二资源接收第二干扰信号, 第二干扰信号 为第二终端在第二资源向基站发送第三信号产生的干扰信号, 其中, 在第二 资源不存在向终端 300发送的下行信号;
第二接收单元 312, 用于接收第二终端发送的第三信号的重构信息, 第 二终端发送第三信号的重构信息所使用的资源与第二资源不同;
确定单元 313, 用于根据第一接收单元 311接收的第二干扰信号和第二 接收单元 312接收的第三信号的重构信息,确定第二终端的发射天线到终端 300的接收天线的信道参数。
可选地, 作为一个具体实施例, 当终端 300接收到的信号中干扰信号和 有用信号的功率比值大于第一阔值,并且小于第二阔值时,第二接收单元 312 接收的第三信号的重构信息包括: 第三信号对应的未经调制的数字基带信号 和调制方式; 终端 300还包括: 第二接收模块 340, 用于接收第二终端发送 的第二信号的重构信息, 第二信号的重构信息包括第二信号对应的未经调制 的数字基带信号和调制方式, 第二终端发送第二信号的重构信息所使用的资 源与第一资源不同; 干扰消除模块 330具体用于: 根据第二接收模块 340接 收的第二信号的重构信息和确定单元 313确定的信道参数,确定第一信号中 的第一干扰信号, 并消除第一干扰信号。
可选地, 当射频通道线性度不足时, 第二接收模块 340接收的第二信号 的重构信息还包括: 第二信号的射频通道的非线性估计; 第二接收单元 312 接收的第三信号的重构信息还包括: 第三信号的射频通道的非线性估计。
可选地, 作为另一个具体实施例, 当终端 300接收到的信号中干扰信号 和有用信号的功率比值大于或者等于第二阔值, 并且小于或者等于第三阔值 时, 第二接收单元 312接收的第三信号的重构信息包括: 第三信号对应的未
经调制的数字基带信号和调制方式。
可选地, 当射频通道线性度不足时, 第二接收单元 312接收的第三信号 的重构信息还包括: 第三信号的射频通道的非线性估计; 终端 300还包括: 第二接收模块 340, 用于接收第二终端发送的第二信号的重构信息, 第二信 号的重构信息包括第二信号的射频通道的非线性估计, 第二终端发送第二信 号的重构信息所使用的资源与第一资源不同; 干扰消除模块 330具体用于: 根据第二接收模块 340接收的第二信号的重构信息和确定单元 313确定的信 道参数, 确定第一信号中的第一干扰信号, 并消除第一干扰信号。
可选地, 作为又一个具体实施例, 当终端 300接收到的信号中干扰信号 和有用信号的功率比值大于第三阔值时, 第二接收单元 312接收的第三信号 的重构信息包括: 第三信号对应的射频信号; 终端 300还包括: 第二接收模 块 340, 用于接收第二终端发送的第二信号的重构信息, 第二信号的重构信 息包括第二信号对应的射频信号, 第二终端发送第二信号的重构信息所使用 的资源与第一资源不同;干扰消除模块 330具体用于:根据第二接收模块 340 接收的第二信号的重构信息和确定单元 313确定的信道参数,确定第一信号 中的第一干扰信号, 并消除第一干扰信号。
应理解, 终端 300的第二接收单元 312具体可以用于: 通过有线连接通 信方式、 设备对设备通信方式或无线局域网通信方式, 接收第二终端发送的 第三信号的重构信息。 第二接收模块 340具体可以用于: 通过有线连接通信 方式、 设备对设备通信方式或无线局域网通信方式, 接收第二终端发送的第 二信号的重构信息。
因此, 本发明实施例提供的用于干扰消除的终端, 根据第二终端在第一 资源向基站发送的信号的重构信息, 可以准确地估算出终端间的信道参数, 将该终端间的信道参数应用于对在第一资源接收的信号的干扰消除,可以获 得更好的干扰消除效果。
图 7示出了根据本发明实施例的终端 400的示意性框图。 如图 7所示, 该终端 400包括:
第一发送模块 410, 用于在第二资源向基站发送第三信号, 其中, 在第 二资源不存在向第一终端发送的下行信号, 第一终端在第二资源接收由第三 信号产生的第二干扰信号;
第二发送模块 420, 用于向第一终端发送第三信号的重构信息, 以便于
第一终端根据第三信号的重构信息和第二干扰信号,确定终端的发射天线到 第一终端的接收天线的信道参数, 其中, 终端发送第三信号的重构信息所使 用的资源与第二资源不同;
第三发送模块 430, 用于在第一资源向基站发送第二信号, 其中, 在第 一资源第一终端接收第一信号, 第一信号包括: 第一干扰信号和来自基站的 有用信号, 第一干扰信号为终端在第一资源向基站发送第二信号产生的干扰 信号。
因此, 本发明实施例提供的终端, 通过向第一终端发送该终端在第二资 源向基站发送的信号的重构信息,使得第一终端可以估算出终端间的信道参 数, 将该信道参数应用于在第一资源接收的信号的干扰消除, 能够实现对在 第一资源接收的信号进行终端间的干扰信号的消除。
可选地, 作为一个实施例, 第二发送模块 420发送的第三信号的重构信 息包括: 第三信号对应的未经调制的数字基带信号和调制方式; 终端 400还 包括: 第四发送模块 440, 用于向第一终端发送第二信号的重构信息, 第二 信号的重构信息包括第二信号对应的未经调制的数字基带信号和调制方式。
可选地, 当射频通道线性度不足时, 第四发送模块 440发送的第二信号 的重构信息还包括: 第二信号的射频通道的非线性估计; 第二发送模块 420 发送的第三信号的重构信息还包括: 第三信号的射频通道的非线性估计。
可选地, 作为另一个实施例, 第二发送模块 420发送的第三信号的重构 信息包括: 第三信号对应的未经调制的数字基带信号和调制方式。
可选地, 第二发送模块 420发送的第三信号的重构信息还包括: 第三信 号的射频通道的非线性估计; 终端 400还包括: 第四发送模块 440, 用于向 第一终端发送第二信号的重构信息, 第二信号的重构信息包括第二信号的射 频通道的非线性估计。
可选地, 作为又一个实施例, 第二发送模块 420发送的第三信号的重构 信息包括: 第三信号对应的射频信号; 终端 400还包括: 第四发送模块 440, 用于向第一终端发送第三信号的信息, 第三信号的信息包括第三信号对应的 射频信号。
应理解, 第二发送模块 420具体可以用于: 通过有线连接通信方式、 设 备对设备通信方式或无线局域网通信方式, 向第一终端发送第三信号的重构 信息。 第四发送模块 440具体可以用于: 通过有线连接通信方式、 设备对设
备通信方式或无线局域网通信方式, 向第一终端发送第二信号的重构信息。 因此, 本发明实施例提供的终端, 通过向第一终端发送该终端在第二资 源向基站发送的信号的重构信息,使得第一终端可以估算出终端间的信道参 数, 将该信道参数应用于在第一资源接收的信号的干扰消除, 能够实现对在 第一资源接收的信号进行终端间的干扰信号的消除。
图 8示出了根据本发明另一实施例的终端 500的示意性框图。如图 8所 示,该终端 500包括处理器 510、接收器 520、存储器 530和总线 540。其中, 处理器 510、 接收器 520、 和存储器 530通过总线系统 540相连, 该存储器 530用于存储指令,该处理器 510用于执行该存储器 530存储的指令。其中, 该接收器 520用于:
在第一资源接收第一信号, 第一信号包括: 第一干扰信号和来自基站的 有用信号, 第一干扰信号为第二终端在第一资源向基站发送第二信号产生的 干扰信号;
处理器 510用于:
确定第二终端的发射天线到终端 500的接收天线的信道参数;
根据信道参数,确定第一信号中的第一干扰信号,并消除第一干扰信号。 因此, 本发明实施例提供的终端, 根据第二终端的发射天线到终端 300 的接收天线的信道参数, 能够实现对在第一资源接收的信号进行终端间的干 扰信号的消除。
应理解,在本发明实施例中,该处理器 510可以是中央处理单元(CPU,
Central Processing Unit ), 该处理器 510还可以是其他通用处理器、 数字信号 处理器 (DSP )、 专用集成电路(ASIC )、 现成可编程门阵列 (FPGA )或者 其他可编程逻辑器件、 分立门或者晶体管逻辑器件、 分立硬件组件等。 通用 处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器 530可以包括只读存储器和随机存取存储器, 并向处理器 510 提供指令和数据。存储器 530的一部分还可以包括非易失性随机存取存储器。 例如, 存储器 530还可以存储设备类型的信息。
该总线系统 540除包括数据总线之外, 还可以包括电源总线、 控制总线 和状态信号总线等。 但是为了清楚说明起见, 在图中将各种总线都标为总线 系统 540。
在实现过程中, 上述方法的各步骤可以通过处理器 510中的硬件的集成
逻辑电路或者软件形式的指令完成。 结合本发明实施例所公开的方法的步骤 可以直接体现为硬件处理器执行完成, 或者用处理器中的硬件及软件模块组 合执行完成。 软件模块可以位于随机存储器, 闪存、 只读存储器, 可编程只 读存储器或者电可擦写可编程存储器、 寄存器等本领域成熟的存储介质中。 该存储介质位于存储器 530, 处理器 510读取存储器 530中的信息, 结合其 硬件完成上述方法的步骤。 为避免重复, 这里不再详细描述。
可选地, 作为一个实施例, 处理器 510确定第二终端的发射天线到终端 500的接收天线的信道参数, 包括:
在第二资源接收第二干扰信号,第二干扰信号为第二终端在第二资源向 基站发送第三信号产生的干扰信号, 其中, 在第二资源不存在向终端 500发 送的下行信号;
接收第二终端发送的第三信号的重构信息, 第二终端发送第三信号的重 构信息所使用的资源与第二资源不同;
根据第二干扰信号和第三信号的重构信息,确定第二终端的发射天线到 终端 500的接收天线的信道参数。
可选地, 作为一个具体实施例, 当终端 500接收到的信号中干扰信号和 有用信号的功率比值大于第一阔值, 并且小于第二阔值时, 第三信号的重构 信息包括: 第三信号对应的未经调制的数字基带信号和调制方式;
在处理器 510根据信道参数, 确定第一信号中的第一干扰信号, 并消除 第一干扰信号之前, 接收器 520还用于:
接收第二终端发送的第二信号的重构信息, 第二信号的重构信息包括第 二信号对应的未经调制的数字基带信号和调制方式, 第二终端发送第二信号 的重构信息所使用的资源与第一资源不同;
处理器 510还具体用于:
根据第二信号的重构信息和信道参数, 确定第一信号中的第一干扰信 号, 并消除第一干扰信号。
可选地, 当射频通道的线性度不足时, 第二信号的重构信息还包括: 第 二信号的射频通道的非线性估计; 第三信号的重构信息还包括: 第三信号的 射频通道的非线性估计。
可选地, 作为另一个具体实施例, 当终端 500接收到的信号中干扰信号 和有用信号的功率比值大于或者等于第二阔值, 并且小于或者等于第三阔值
时, 第三信号的重构信息包括: 第三信号对应的未经调制的数字基带信号和 调制方式。
可选地, 当射频通道的线性度不足时, 第三信号的重构信息还包括: 第 三信号的射频通道的非线性估计;
在处理器 510根据信道参数, 确定第一信号中的第一干扰信号, 并消除 第一干扰信号之前, 接收器 520还用于:
接收第二终端发送的第二信号的重构信息, 第二信号的重构信息包括第 二信号的射频通道的非线性估计, 第二终端发送第二信号的重构信息所使用 的资源与第一资源不同;
处理器 510还具体用于:
根据第二信号的重构信息和信道参数, 确定第一信号中的第一干扰信 号, 并消除第一干扰信号。
可选地, 作为又一个具体实施例, 当终端 500接收到的信号中干扰信号 和有用信号的功率比值大于第三阔值时, 第三信号的重构信息包括: 第三信 号对应的射频信号;
在处理器 510根据信道参数, 确定第一信号中的第一干扰信号, 并消除 第一干扰信号之前, 接收器 520还用于:
接收第二终端发送的第二信号的重构信息, 第二信号的重构信息包括第 二信号对应的射频信号, 第二终端发送第二信号的重构信息所使用的资源与 第一资源不同;
处理器 510还具体用于:
根据第二信号的重构信息和信道参数, 确定第一信号中的第一干扰信 号, 并消除第一干扰信号。
应理解,接收器 520接收第二终端发送的第二信号的重构信息和 /或接收 第二终端发送的第三信号的重构信息可以通过有线连接通信方式、设备对设 备通信方式或无线局域网通信方式, 本发明实施例对此不作限定。 的方法的主体, 还可以对应于根据本发明实施例的终端 300, 并且终端 500 中的各个模块的上述和其它操作和 /或功能是为了实现图 2和图 3的方法的相 应流程, 为了简洁, 在此不再赘述。
因此, 本发明实施例提供的用于干扰消除的终端, 根据第二终端在第一
资源向基站发送的信号的重构信息, 可以准确地估算出终端间的信道参数, 将该终端间的信道参数应用于对在第一资源接收的信号的干扰消除,可以获 得更好的干扰消除效果。
图 9示出了根据本发明另一实施例的终端 600的示意性框图。如图 9所 示,该终端 600包括处理器 610、发送器 620、存储器 630和总线 640。其中, 处理器 610、 发送器 620、 和存储器 630通过总线系统 640相连, 该存储器 630用于存储指令,该处理器 610用于执行该存储器 630存储的指令。其中, 该发送器 620用于:
在第二资源向基站发送第三信号, 其中, 在第二资源不存在向第一终端 发送的下行信号, 第一终端在第二资源接收由第三信号产生的第二干扰信 号;
向第一终端发送第三信号的重构信息, 以便于第一终端根据第三信号的 重构信息和第二干扰信号,确定终端 600的发射天线到第一终端的接收天线 的信道参数, 其中, 终端 600发送第三信号的重构信息所使用的资源与第二 资源不同;
在第一资源向基站发送第二信号, 其中, 在第一资源第一终端接收第一 信号, 第一信号包括: 第一干扰信号和来自基站的有用信号, 第一干扰信号 为终端 600在第一资源向基站发送第二信号产生的干扰信号。
因此, 本发明实施例提供的终端, 通过向第一终端发送该终端在第二资 源向基站发送的信号的重构信息,使得第一终端可以估算出终端间的信道参 数, 将该信道参数应用于在第一资源接收的信号的干扰消除, 能够实现对在 第一资源接收的信号进行终端间的干扰信号的消除。
应理解,在本发明实施例中,该处理器 610可以是中央处理单元( Central Processing Unit, CPU ), 该处理器 610还可以是其他通用处理器、 数字信号 处理器 (DSP )、 专用集成电路(ASIC )、 现成可编程门阵列 (FPGA )或者 其他可编程逻辑器件、 分立门或者晶体管逻辑器件、 分立硬件组件等。 通用 处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器 630可以包括只读存储器和随机存取存储器, 并向处理器 610 提供指令和数据。存储器 630的一部分还可以包括非易失性随机存取存储器。 例如, 存储器 630还可以存储设备类型的信息。
该总线系统 640除包括数据总线之外, 还可以包括电源总线、 控制总线
和状态信号总线等。 但是为了清楚说明起见, 在图中将各种总线都标为总线 系统 640。
在实现过程中, 上述方法的各步骤可以通过处理器 610中的硬件的集成 逻辑电路或者软件形式的指令完成。 结合本发明实施例所公开的方法的步骤 可以直接体现为硬件处理器执行完成, 或者用处理器中的硬件及软件模块组 合执行完成。 软件模块可以位于随机存储器, 闪存、 只读存储器, 可编程只 读存储器或者电可擦写可编程存储器、 寄存器等本领域成熟的存储介质中。 该存储介质位于存储器 630, 处理器 610读取存储器 630中的信息, 结合其 硬件完成上述方法的步骤。 为避免重复, 这里不再详细描述。
可选地,作为一个实施例,发送器 620发送的第三信号的重构信息包括: 第三信号对应的未经调制的数字基带信号和调制方式; 发送器 620还用于: 向第一终端发送第二信号的重构信息, 第二信号的重构信息包括第二信号对 应的未经调制的数字基带信号和调制方式。
可选地, 当射频通道的线性度不足时, 发送器 620发送的第二信号的重 构信息还包括: 第二信号的射频通道的非线性估计; 发送器 620发送的第三 信号的重构信息还包括: 第三信号的射频通道的非线性估计。
可选地, 作为另一个实施例, 发送器 620发送的第三信号的重构信息包 括: 第三信号对应的未经调制的数字基带信号和调制方式。
可选地, 当射频通道的线性度不足时, 发送器 620发送的第三信号的重 构信息还包括: 第三信号的射频通道的非线性估计; 发送器 620还用于: 向 第一终端发送第二信号的重构信息, 第二信号的重构信息包括第二信号的射 频通道的非线性估计。
可选地, 作为又一个实施例, 发送器 620发送的第三信号的重构信息包 括: 第三信号对应的射频信号; 发送器 620还用于:
向第一终端发送第二信号的重构信息, 第二信号的重构信息包括第二信 号对应的射频信号。
应理解,发送器 620向第一终端发送第三信号的重构信息和 /或向第一终 端发送第二信号的重构信息, 可以通过有线连接通信方式、 设备对设备通信 方式或无线局域网通信方式, 本发明实施例对此不作限定。 方法的主体, 还可以对应于根据本发明实施例的终端 400, 并且终端 600中
的各个模块的上述和其它操作和 /或功能是为了实现图 2和图 3的方法的相应 流程, 为了简洁, 在此不再赘述。
因此, 本发明实施例提供的终端, 通过向第一终端发送该终端在第二资 源向基站发送的信号的重构信息,使得第一终端可以估算出终端间的信道参 数, 将该信道参数应用于在第一资源接收的信号的干扰消除, 能够实现对在 第一资源接收的信号进行终端间的干扰信号的消除。
另外, 本文中术语 "和 /或", 仅仅是一种描述关联对象的关联关系, 表 示可以存在三种关系, 例如, A和 /或 可以表示: 单独存在 , 同时存在 八和^ 单独存在 B这三种情况。 另外, 本文中字符 "/", 一般表示前后关 联对象是一种 "或" 的关系。
本领域普通技术人员可以意识到, 结合本文中所公开的实施例描述的各 示例的单元及算法步骤, 能够以电子硬件、 计算机软件或者二者的结合来实 现, 为了清楚地说明硬件和软件的可互换性, 在上述说明中已经按照功能一 般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执 行, 取决于技术方案的特定应用和设计约束条件。 专业技术人员可以对每个 特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超 出本发明的范围。
所属领域的技术人员可以清楚地了解到, 为了描述的方便和简洁, 上述 描述的系统、 装置和单元的具体工作过程, 可以参考前述方法实施例中的对 应过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统、 装置和 方法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示 意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可 以有另外的划分方式, 例如多个单元或组件可以结合或者可以集成到另一个 系统, 或一些特征可以忽略, 或不执行。 另夕卜, 所显示或讨论的相互之间的 耦合或直接辆合或通信连接可以是通过一些接口、装置或单元的间接辆合或 通信连接, 也可以是电的, 机械的或其它的形式连接。 为单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或 者全部单元来实现本发明实施例方案的目的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元 中, 也可以是各个单元单独物理存在, 也可以是两个或两个以上单元集成在 一个单元中。 上述集成的单元既可以釆用硬件的形式实现, 也可以釆用软件 功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销 售或使用时, 可以存储在一个计算机可读取存储介质中。 基于这样的理解, 本发明的技术方案本质上或者说对现有技术做出贡献的部分,或者该技术方 案的全部或部分可以以软件产品的形式体现出来, 该计算机软件产品存储在 一个存储介质中, 包括若干指令用以使得一台计算机设备(可以是个人计算 机, 服务器, 或者网络设备等)执行本发明各个实施例所述方法的全部或部 分步骤。 而前述的存储介质包括: U盘、 移动硬盘、 只读存储器 (ROM, Read-Only Memory )、 随机存取存 4诸器 ( RAM, Random Access Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到各种等效的修改或替换, 这些修改或替换都应涵盖在本发明的保护范围 之内。 因此, 本发明的保护范围应以权利要求的保护范围为准。
Claims
1. 一种用于干扰消除的方法, 其特征在于, 包括:
第一终端确定第二终端的发射天线到所述第一终端的接收天线的信道 参数;
所述第一终端在第一资源接收第一信号, 所述第一信号包括: 第一干扰 信号和来自基站的有用信号, 所述第一干扰信号为所述第二终端在所述第一 资源向所述基站发送第二信号产生的干扰信号;
所述第一终端根据所述信道参数,确定所述第一信号中的所述第一干扰 信号, 并消除所述第一干扰信号。
2. 根据权利要求 1所述的方法,其特征在于,所述第一终端确定第二终 端的发射天线到所述第一终端的接收天线的信道参数, 包括:
第一终端在第二资源接收第二干扰信号,所述第二干扰信号为第二终端 在所述第二资源向基站发送第三信号产生的干扰信号, 其中, 在所述第二资 源不存在向所述第一终端发送的下行信号;
所述第一终端接收所述第二终端发送的所述第三信号的重构信息, 所述 第二终端发送所述第三信号的重构信息所使用的资源与所述第二资源不同; 所述第一终端根据所述第二干扰信号和所述第三信号的重构信息,确定 所述第二终端的发射天线到所述第一终端的接收天线的信道参数。
3. 根据权利要求 2所述的方法,其特征在于, 当所述第一终端接收到的 信号中干扰信号和有用信号的功率比值大于第一阔值, 并且小于第二阔值 时, 所述第三信号的重构信息包括: 所述第三信号对应的未经调制的数字基 带信号和调制方式;
在所述第一终端根据所述信道参数,确定所述第一信号中的所述第一干 扰信号, 并消除所述第一干扰信号之前, 所述方法还包括:
所述第一终端接收所述第二终端发送的所述第二信号的重构信息, 所述 第二信号的重构信息包括所述第二信号对应的未经调制的数字基带信号和 调制方式, 所述第二终端发送所述第二信号的重构信息所使用的资源与所述 第一资源不同;
所述第一终端根据所述信道参数,确定所述第一信号中的所述第一干扰 信号, 并消除所述第一干扰信号, 包括:
所述第一终端根据所述第二信号的重构信息和所述信道参数,确定所述
第一信号中的所述第一干扰信号, 并消除所述第一干扰信号。
4. 根据权利要求 3所述的方法,其特征在于,所述第二信号的重构信息 还包括: 所述第二信号的射频通道的非线性估计;
所述第三信号的重构信息还包括: 所述第三信号的射频通道的非线性估 计。
5. 根据权利要求 2所述的方法,其特征在于, 当所述第一终端接收到的 信号中干扰信号和有用信号的功率比值大于或者等于第二阔值, 并且小于或 者等于第三阔值时, 所述第三信号的重构信息包括:
所述第三信号对应的未经调制的数字基带信号和调制方式。
6. 根据权利要求 5所述的方法,其特征在于,所述第三信号的重构信息 还包括:
所述第三信号的射频通道的非线性估计;
在所述第一终端根据所述信道参数,确定所述第一信号中的所述第一干 扰信号, 并消除所述第一干扰信号之前, 所述方法还包括:
所述第一终端接收所述第二终端发送的所述第二信号的重构信息, 所述 第二信号的重构信息包括所述第二信号的射频通道的非线性估计, 所述第二 终端发送所述第二信号的重构信息所使用的资源与所述第一资源不同; 所述第一终端根据所述信道参数,确定所述第一信号中的所述第一干扰 信号, 并消除所述第一干扰信号, 包括:
所述第一终端根据所述第二信号的重构信息和所述信道参数,确定所述 第一信号中的所述第一干扰信号, 并消除所述第一干扰信号。
7. 根据权利要求 2所述的方法,其特征在于, 当所述第一终端接收到的 信号中干扰信号和有用信号的功率比值大于第三阔值时, 所述第三信号的重 构信息包括: 所述第三信号对应的射频信号;
在所述第一终端根据所述信道参数,确定所述第一信号中的所述第一干 扰信号, 并消除所述第一干扰信号之前, 所述方法还包括:
所述第一终端接收所述第二终端发送的所述第二信号的重构信息, 所述 第二信号的重构信息包括所述第二信号对应的射频信号, 所述第二终端发送 所述第二信号的重构信息所使用的资源与所述第一资源不同;
所述第一终端根据所述信道参数,确定所述第一信号中的所述第一干扰 信号, 并消除所述第一干扰信号, 包括:
所述第一终端根据所述第二信号的重构信息和所述信道参数,确定所述 第一信号中的所述第一干扰信号, 并消除所述第一干扰信号。
8. 根据权利要求 2至 7中任一项所述的方法,其特征在于,所述第一终 端接收所述第二终端发送的所述第三信号的重构信息, 包括:
所述第一终端通过有线连接通信方式、设备对设备通信方式或无线局域 网通信方式, 接收所述第二终端发送的所述第三信号的重构信息。
9. 根据权利要求 3、 4、 6、 7或 8中任一项所述的方法, 其特征在于, 所述第一终端接收所述第二终端发送的所述第二信号的重构信息, 包括: 所述第一终端通过有线连接通信方式、设备对设备通信方式或无线局域 网通信方式, 接收所述第二终端发送的所述第二信号的重构信息。
10. 一种用于干扰消除的方法, 其特征在于, 包括:
第二终端在第二资源向基站发送第三信号, 其中, 在所述第二资源不存 在向第一终端发送的下行信号, 所述第一终端在所述第二资源接收由所述第 三信号产生的第二干扰信号;
所述第二终端向所述第一终端发送所述第三信号的重构信息, 以便于所 述第一终端根据所述第三信号的重构信息和所述第二干扰信号,确定所述第 二终端的发射天线到所述第一终端的接收天线的信道参数, 其中, 所述第二 终端发送所述第三信号的重构信息所使用的资源与所述第二资源不同; 所述第二终端在第一资源向基站发送第二信号, 其中, 在所述第一资源 第一终端接收第一信号, 所述第一信号包括: 第一干扰信号和来自所述基站 的有用信号, 所述第一干扰信号为所述第二终端在所述第一资源向所述基站 发送第二信号产生的干扰信号。
11. 根据权利要求 10所述的方法,其特征在于, 所述第三信号的重构信 息包括: 所述第三信号对应的未经调制的数字基带信号和调制方式;
所述方法还包括:
所述第二终端向所述第一终端发送所述第二信号的重构信息,所述第二 信号的重构信息包括所述第二信号对应的未经调制的数字基带信号和调制 方式。
12. 根据权利要求 11所述的方法,其特征在于, 所述第二信号的重构信 息还包括: 所述第二信号的射频通道的非线性估计;
所述第三信号的重构信息还包括: 所述第三信号的射频通道的非线性估
计。
13. 根据权利要求 10所述的方法,其特征在于,所述第三信号的重构信 息包括: 所述第三信号对应的未经调制的数字基带信号和调制方式。
14. 根据权利要求 13所述的方法,其特征在于,所述第三信号的重构信 息还包括: 所述第三信号的射频通道的非线性估计;
所述方法还包括:
所述第二终端向所述第一终端发送所述第二信号的重构信息, 所述第二 信号的重构信息包括所述第二信号的射频通道的非线性估计。
15. 根据权利要求 10所述的方法,其特征在于,所述第三信号的重构信 息包括: 所述第三信号对应的射频信号;
所述方法还包括:
所述第二终端向所述第一终端发送所述第二信号的重构信息, 所述第二 信号的重构信息包括所述第二信号对应的射频信号。
16. 根据权利要求 10至 15中任一项所述的方法, 其特征在于, 所述第 二终端向所述第一终端发送所述第三信号的重构信息, 包括:
所述第二终端通过有线连接通信方式、设备对设备通信方式或无线局域 网通信方式, 向所述第一终端发送所述第三信号的重构信息。
17. 根据权利要求 11、 12、 14、 15或 16中任一项所述的方法, 其特征 在于, 所述第二终端向所述第一终端发送所述第二信号的重构信息, 包括: 所述第二终端通过有线连接通信方式、设备对设备通信方式或无线局域 网通信方式, 向所述第一终端发送所述第二信号的重构信息。
18. 一种终端, 其特征在于, 包括:
确定模块(310 ), 用于确定第二终端的发射天线到所述终端的接收天线 的信道参数;
第一接收模块(320 ), 用于在第一资源接收第一信号, 所述第一信号包 括: 第一干扰信号和来自基站的有用信号, 所述第一干扰信号为所述第二终 端在所述第一资源向所述基站发送第二信号产生的干扰信号;
干扰消除模块(330 ), 用于根据所述确定模块(310 )确定的所述信道 参数, 确定所述第一接收模块(320 )接收的所述第一信号中的所述第一干 扰信号, 并消除所述第一干扰信号。
19. 根据权利要求 18所述的终端, 其特征在于, 所述确定模块(310 )
包括:
第一接收单元(311 ), 用于在第二资源接收第二干扰信号, 所述第二干 扰信号为第二终端在所述第二资源向基站发送第三信号产生的干扰信号, 其 中, 在所述第二资源不存在向所述终端发送的下行信号;
第二接收单元(312 ), 用于接收所述第二终端发送的所述第三信号的重 构信息, 所述第二终端发送所述第三信号的重构信息所使用的资源与所述第 二资源不同;
确定单元(313 ), 用于根据所述第二干扰信号和所述第三信号的重构信 息, 确定所述第二终端的发射天线到所述终端的接收天线的信道参数。
20. 根据权利要求 19所述的终端,其特征在于, 当所述终端接收到的信 号中干扰信号和有用信号的功率比值大于第一阔值, 并且小于第二阔值时, 所述第二接收单元(312 )接收的所述第三信号的重构信息包括: 所述第三 信号对应的未经调制的数字基带信号和调制方式;
所述终端还包括:
第二接收模块( 340 ), 用于接收所述第二终端发送的所述第二信号的重 构信息, 所述第二信号的重构信息包括所述第二信号对应的未经调制的数字 基带信号和调制方式, 所述第二终端发送所述第二信号的重构信息所使用的 资源与所述第一资源不同;
所述干扰消除模块(330 )具体用于:
根据所述第二接收模块(340 )接收的所述第二信号的重构信息和所述 确定单元(313 )确定的所述信道参数, 确定所述第一信号中的所述第一干 扰信号, 并消除所述第一干扰信号。
21. 根据权利要求 20所述的终端,其特征在于,所述第二接收模块( 340 ) 接收的所述第二信号的重构信息还包括: 所述第二信号的射频通道的非线性 估计;
所述第二接收单元(312 )接收的所述第三信号的重构信息还包括: 所 述第三信号的射频通道的非线性估计。
22. 根据权利要求 19所述的终端,其特征在于, 当所述终端接收到的信 号中干扰信号和有用信号的功率比值大于或者等于第二阔值, 并且小于或者 等于第三阔值时, 所述第二接收单元(312 )接收的所述第三信号的重构信 息包括:
所述第三信号对应的未经调制的数字基带信号和调制方式。
23. 根据权利要求 22所述的终端,其特征在于,所述第二接收单元( 312 ) 接收的所述第三信号的重构信息还包括:
所述第三信号的射频通道的非线性估计;
所述终端还包括:
第二接收模块(340 ), 用于接收所述第二终端发送的所述第二信号的重 构信息, 所述第二信号的重构信息包括所述第二信号的射频通道的非线性估 计, 所述第二终端发送所述第二信号的重构信息所使用的资源与所述第一资 源不同;
所述干扰消除模块( 330 )具体用于:
根据所述第二接收模块(340 )接收的所述第二信号的重构信息和所述 确定单元(313 )确定的所述信道参数, 确定所述第一信号中的所述第一干 扰信号, 并消除所述第一干扰信号。
24. 根据权利要求 19所述的终端,其特征在于, 当所述终端接收到的信 号中干扰信号和有用信号的功率比值大于第三阔值时, 所述第二接收单元
( 312 )接收的所述第三信号的重构信息包括: 所述第三信号对应的射频信 号;
所述终端还包括:
第二接收模块(340 ), 用于接收所述第二终端发送的所述第二信号的重 构信息, 所述第二信号的重构信息包括所述第二信号对应的射频信号, 所述 第二终端发送所述第二信号的重构信息所使用的资源与所述第一资源不同; 所述干扰消除模块(330 )具体用于:
根据所述第二接收模块(340 )接收的所述第二信号的重构信息和所述 确定单元(313 )确定的所述信道参数, 确定所述第一信号中的所述第一干 扰信号, 并消除所述第一干扰信号。
25. 根据权利要求 19至 24中任一项所述的终端, 其特征在于, 所述第 二接收单元(312 )具体用于:
通过有线连接通信方式、 设备对设备通信方式或无线局域网通信方式, 接收所述第二终端发送的所述第三信号的重构信息。
26. 根据权利要求 20、 21、 23、 24或 25中任一项所述的终端, 所述第 二接收模块(340 )具体用于:
通过有线连接通信方式、 设备对设备通信方式或无线局域网通信方式, 接收所述第二终端发送的所述第二信号的重构信息。
27. 一种终端, 其特征在于, 包括:
第一发送模块(410 ), 用于在第二资源向基站发送第三信号, 其中, 在 所述第二资源不存在向第一终端发送的下行信号, 所述第一终端在所述第二 资源接收由所述第三信号产生的第二干扰信号;
第二发送模块(420 ), 用于向所述第一终端发送所述第三信号的重构信 息, 以便于所述第一终端根据所述第三信号的重构信息和所述第二干扰信 号,确定所述终端的发射天线到所述第一终端的接收天线的信道参数,其中, 所述终端发送所述第三信号的重构信息所使用的资源与所述第二资源不同; 第三发送模块(430 ), 用于在第一资源向基站发送第二信号, 其中, 在 所述第一资源所述第一终端接收第一信号, 所述第一信号包括: 第一干扰信 号和来自所述基站的有用信号, 所述第一干扰信号为所述终端在所述第一资 源向所述基站发送第二信号产生的干扰信号。
28. 根据权利要求 27所述的终端,其特征在于,所述第二发送模块( 420 ) 发送的所述第三信号的重构信息包括: 所述第三信号对应的未经调制的数字 基带信号和调制方式;
所述终端还包括:
第四发送模块(440 ), 用于向所述第一终端发送所述第二信号的重构信 息, 所述第二信号的重构信息包括所述第二信号对应的未经调制的数字基带 信号和调制方式。
29. 根据权利要求 28所述的终端,其特征在于,所述第四发送模块( 440 ) 发送的所述第二信号的重构信息还包括: 所述第二信号的射频通道的非线性 估计;
所述第二发送模块(420 )发送的所述第三信号的重构信息还包括: 所 述第三信号的射频通道的非线性估计。
30. 根据权利要求 27所述的终端,其特征在于,所述第二发送模块( 420 ) 发送的所述第三信号的重构信息包括: 所述第三信号对应的未经调制的数字 基带信号和调制方式。
31. 根据权利要求 30所述的终端,其特征在于,所述第二发送模块( 420 ) 发送的所述第三信号的重构信息还包括: 所述第三信号的射频通道的非线性
估计;
所述终端还包括:
第四发送模块(440 ), 用于向所述第一终端发送所述第二信号的重构信 息, 所述第二信号的重构信息包括所述第二信号的射频通道的非线性估计。
32. 根据权利要求 27所述的终端,其特征在于,所述第二发送模块( 420 ) 发送的所述第三信号的重构信息包括: 所述第三信号对应的射频信号;
所述终端还包括:
第四发送模块(440 ), 用于向所述第一终端发送所述第二信号的重构信 息, 所述第二信号的重构信息包括所述第二信号对应的射频信号。
33. 根据权利要求 27 至 32 中任一项所述的终端, 所述第二发送模块
( 420 )具体用于:
通过有线连接通信方式、 设备对设备通信方式或无线局域网通信方式, 向所述第一终端发送所述第三信号的重构信息。
34. 根据权利要求 28、 29、 31、 32或 33中任一项所述的终端, 所述第 四发送模块( 440 )具体用于:
通过有线连接通信方式、 设备对设备通信方式或无线局域网通信方式, 向所述第一终端发送所述第二信号的重构信息。
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