WO2015161508A1 - 估计基带自干扰信道响应的方法和装置 - Google Patents

估计基带自干扰信道响应的方法和装置 Download PDF

Info

Publication number
WO2015161508A1
WO2015161508A1 PCT/CN2014/076232 CN2014076232W WO2015161508A1 WO 2015161508 A1 WO2015161508 A1 WO 2015161508A1 CN 2014076232 W CN2014076232 W CN 2014076232W WO 2015161508 A1 WO2015161508 A1 WO 2015161508A1
Authority
WO
WIPO (PCT)
Prior art keywords
baseband
interference
self
signal
parameter
Prior art date
Application number
PCT/CN2014/076232
Other languages
English (en)
French (fr)
Inventor
程宏
陈特彦
刘晟
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201480077683.9A priority Critical patent/CN106464420B/zh
Priority to PCT/CN2014/076232 priority patent/WO2015161508A1/zh
Publication of WO2015161508A1 publication Critical patent/WO2015161508A1/zh
Priority to US15/332,483 priority patent/US10044531B2/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/29—Flow control; Congestion control using a combination of thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1461—Suppression of signals in the return path, i.e. bidirectional control circuits

Definitions

  • Embodiments of the present invention relate to the field of communications technology and, more particularly, to a method and apparatus for estimating a baseband self-interfering channel response. Background technique
  • the wireless full-duplex technology enables two communication nodes to transmit bidirectional signals on the same time-frequency resource. That is to say, a communication node supporting wireless full duplex can use the same time-frequency resource for uplink and downlink transmission.
  • a communication node supporting wireless full duplex can use the same time-frequency resource for uplink and downlink transmission.
  • the transmitted signal of the communication node interferes with the received signal of the communication node. This type of interference is called self-interference.
  • the channel between the baseband transmit module of the communication node and the baseband receive module is referred to as a baseband self-interference channel.
  • the baseband self-interference channel may include: a cascading channel for transmitting a radio frequency channel response, a spatial channel, a leaked channel response of an echo reflection of the radio frequency circuit, an analog interference cancellation, and a receiving RF channel channel response. Further, in the case where the communication node uses a circulator, the baseband self-interference channel may further include a channel response of the circulator.
  • Methods for removing self-interference include one or more of the following: antenna isolation, analog interference removal, and digital interference removal.
  • the digital interference cancellation process includes: a communication node supporting wireless full duplex can estimate the response of the baseband self-interference channel of the communication node; the communication node reconstructs the self-interference of the baseband by using the estimated baseband self-interference channel response, and then The baseband self-interference of the structure is subtracted from the actual baseband self-interference.
  • the result of the subtraction is called residual interference of the baseband self-interference channel, referred to as residual interference.
  • residual interference residual interference of the baseband self-interference channel
  • r Xrx - x; x , Equation 1.1
  • r denotes residual interference
  • ⁇ denotes actual baseband self-interference
  • XfX hx, where h denotes the response of the baseband self-interference channel
  • X represents the baseband transmit signal x:
  • x hx, where h' represents the estimated baseband self-interference channel response.
  • the signal used to estimate the response of the baseband self-interference channel is simply referred to as a baseband estimation signal.
  • the baseband estimate signal can be a baseband signal of the communication node.
  • the time domain resources and frequency domain resources used to transmit the baseband estimation signal may affect the accuracy of the estimated baseband self-interference channel response. Therefore, by sending Selecting an appropriate time domain resource or frequency domain resource for the baseband estimation signal can improve the accuracy of the estimated baseband self-interference channel response. Summary of the invention
  • Embodiments of the present invention provide a method and apparatus for estimating a baseband self-interference channel response, which can effectively improve the accuracy of an estimated baseband self-interference channel response.
  • an embodiment of the present invention provides a method for estimating a response of a baseband self-interference channel, the method comprising: estimating a response of a baseband self-interference channel to obtain a first estimated response of the baseband self-interference channel; Duplex communication; deleting baseband self-interference in the first baseband received signal according to the first estimated response, wherein the first baseband received signal is a baseband signal received in the first full-duplex communication; determining the baseband self a first parameter of the interference channel, wherein the first parameter is related to residual interference of the baseband self-interference channel; determining, according to the first parameter, an estimation strategy of the baseband self-interference channel; and estimating the baseband self-interference channel according to the estimation strategy the response to.
  • the first baseband received signal includes a first baseband received signal at a first time and a first baseband received signal at a second time; the determining the baseband self-interference channel
  • the first parameter includes: determining a baseband signal transmitted at a first time and a processed signal at a first time, wherein the processed signal at the first time is the first baseband reception at the first time after the self-interference of the baseband is deleted a signal; a baseband signal transmitted at a second time and a processed signal at a second time, wherein the processed signal at the second time is a first baseband received signal at the second time after the self-interference of the baseband is deleted; The first time transmitted baseband signal, the first time processed signal, the second time transmitted baseband signal, and the second time processed signal determine the first parameter, wherein the first parameter and the baseband self-interference The power of the residual interference of the channel is proportional.
  • y; (n) is the baseband received signal at the first time
  • x 2 (n) is the baseband signal transmitted at the second time
  • y 2 (n) is the second time
  • the baseband receives the signal.
  • the determining the baseband self-interference channel estimation strategy according to the first parameter includes: When the first parameter is greater than the first preset threshold, determining to stop the first full duplex communication and restarting estimating the response of the baseband self-interference channel.
  • the first time is to start the first full duplex communication.
  • the second time is a time when the channel quality degradation value of the first full duplex communication is less than the second preset threshold.
  • the estimating the baseband self-interference channel response to obtain the first estimated response of the baseband self-interference channel comprises: estimating the baseband estimation signal using the first frequency domain density
  • the baseband self-interference channel is determined according to the first parameter, and the estimation strategy of the baseband self-interference channel is determined, where the baseband self-interference channel estimation strategy is determined if the first parameter is greater than a third preset threshold Estimating the response of the baseband self-interference channel by using a baseband estimation signal of the second frequency domain density, wherein the second frequency domain density is greater than the first frequency domain density; if the first parameter is smaller than the third preset threshold
  • the estimation strategy for determining the baseband self-interference channel is to estimate the response of the baseband self-interference channel using the baseband estimation signal of the first frequency domain density.
  • the determining the first parameter of the baseband self-interference channel includes: determining a power of the first residual interference; determining a power of the first residual interference is The first parameter.
  • the estimation strategy for determining the baseband self-interference channel is to estimate the baseband estimation signal using the second frequency domain density.
  • estimating the response of the baseband self-interference channel according to the estimation strategy includes: estimating a response of the baseband self-interference channel by using the baseband estimation signal of the second frequency domain density to obtain a second Estimating a response; starting a second full duplex communication; deleting baseband self-interference in the second baseband received signal according to the second estimated response, wherein the second baseband received signal is received in the second full duplex communication a baseband signal; determining a power of the second residual interference; determining, in a case where the power of the second residual interference is less than the third preset threshold, maintaining a frequency domain density of the baseband estimation signal unchanged; When the power of the second residual threshold is greater than the third preset threshold, the power of the second residual interference and the work
  • the second parameter is determined according to the power of the second residual interference and the power of the first residual interference, including: The following formula determines the second self-interference channel parameter: R ⁇ Pi - P ⁇ where, 1 2 is the second parameter, which is the power of the first residual interference, and P 2 is the power of the second residual interference.
  • determining, according to the second parameter, whether to increase a frequency domain density of the baseband estimation signal includes: wherein the second parameter is greater than a fourth preset In the case of a threshold, it is determined to increase the frequency domain density of the baseband estimation signal; and if the second parameter is less than the fourth predetermined threshold, it is determined to keep the frequency domain density of the baseband estimation signal unchanged.
  • an embodiment of the present invention provides an apparatus, where the apparatus includes: a control unit, configured to estimate a response of a baseband self-interference channel to obtain a first estimated response of the baseband self-interference channel; and a communications unit, configured to perform the first Full-duplex communication; the control unit is further configured to delete baseband self-interference in the first baseband received signal according to the first estimated response, wherein the first baseband received signal is the first full-duplex communication of the communication unit a baseband signal received in the network; the control unit is further configured to determine a first parameter of the baseband self-interference channel, wherein the first parameter is related to a power of the residual interference of the baseband self-interference channel; the control unit is further used for And determining, according to the first parameter, an estimation strategy of the baseband self-interference channel; the control unit is further configured to estimate a response of the baseband self-interference channel according to the estimation strategy.
  • the control unit is specifically configured to determine a baseband signal transmitted at a first time and a processed signal at a first time, where the processed signal at the first time is deleted
  • the first baseband receiving signal of the first time after the self-interference of the baseband determines a baseband signal transmitted at a second time and a processed signal at a second time, wherein the processed signal of the second time is deleted from the baseband a first baseband received signal at the second time after the interference, a baseband signal transmitted according to the first time, a processed signal at the first time, a baseband signal transmitted at the second time, and a processed signal at the second time
  • the first parameter is determined, wherein the first parameter is proportional to the power of the residual interference of the baseband self-interference channel.
  • control unit is specifically configured to determine the first parameter according to the following formula:
  • ⁇ is the first parameter
  • Xl (n) is the baseband signal transmitted at the first time
  • y is the baseband received signal at the first time
  • x 2 (n) is the baseband signal transmitted at the second time
  • y 2 (n) is the baseband received signal for the second time.
  • control unit is specifically configured to: when the first parameter is greater than the first preset threshold Next, it is determined to stop the first full duplex communication and restart the estimation of the response of the baseband self-interference channel.
  • the control unit is specifically configured to estimate a response of the baseband self-interference channel by using a baseband estimation signal of a first frequency domain density, where the control unit is specifically configured to When the first parameter is greater than the third preset threshold, determining an estimation strategy of the baseband self-interference channel is to estimate a response of the baseband self-interference channel by using a baseband estimation signal of a second frequency domain density, where the second frequency domain density is greater than The first frequency domain density, if the first parameter is smaller than the third preset threshold, determining an estimation strategy of the baseband self-interference channel to estimate the baseband self-interference channel by using the baseband estimation signal of the first frequency domain density the response to.
  • control unit is specifically configured to determine a power of the first residual interference, and determine that the power of the first residual interference is the first parameter.
  • the control unit is further configured to estimate the baseband self-interference using the baseband estimation signal of the second frequency domain density a response of the channel to obtain a second estimated response;
  • the communication unit is further configured to start a second full duplex communication;
  • the control unit is further configured to delete the baseband self-interference in the second baseband received signal according to the second estimated response
  • the second baseband received signal is a baseband signal received in the second full duplex communication;
  • the control unit is further configured to determine a second residual interference power;
  • the control unit is further configured to be in the second If the power of the residual interference is less than the third preset threshold, determining to keep the frequency domain density of the baseband estimation signal unchanged;
  • the control unit is further configured to: the power of the second residual interference is greater than the third preset threshold And determining, according to the power of the second residual interference and the power of the first residual interference, a second parameter, according to the second parameter, determining whether to increase The density of the base band signal frequency domain estimate
  • control unit is configured to: when the second parameter is greater than the fourth preset threshold, determine to increase a frequency domain of the baseband estimation signal Density, if the second parameter is less than the fourth preset threshold, determining to estimate the response of the baseband self-interference channel using the baseband estimation signal of the first frequency domain density.
  • the device is applied to a terminal or a network node, the terminal comprising a mobile terminal and a fixed terminal, the network node comprising a base station and an access point.
  • the communication node can determine a corresponding baseband self-interference channel estimation strategy according to the first parameter of the baseband self-interference channel, and estimate the response of the baseband self-interference channel according to the determined estimation strategy of the baseband self-interference channel.
  • the communication node can effectively improve the accuracy of the response of the estimated baseband self-interference channel.
  • FIG. 1 is a schematic flow chart of a method of estimating a response of a baseband self-interference channel according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method for estimating a baseband self-interference channel response according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for estimating a baseband self-interference channel response according to an embodiment of the present invention.
  • FIG. 4 is a structural block diagram of an apparatus according to an embodiment of the present invention.
  • FIG. 5 is a structural block diagram of an apparatus according to an embodiment of the present invention. detailed description
  • the communication nodes mentioned in the embodiments of the present invention all support a wireless full duplex system.
  • the communication node mentioned in the embodiment of the present invention may be a user equipment, or may be a network node such as a base station or an access point (AP).
  • a user equipment (UE) may communicate with one or more core networks via a radio access network (eg, Radio Access Network, RAN), and the user equipment may It is a fixed terminal, and may also be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a mobile device that can be portable, pocket-sized, handheld, built-in or on-board.
  • a radio access network eg, Radio Access Network, RAN
  • RAN Radio Access Network
  • FIG. 1 is a schematic flow chart of a method of estimating a response of a baseband self-interference channel according to an embodiment of the present invention.
  • the communication node can determine a corresponding baseband self-interference channel estimation strategy according to the first parameter of the baseband self-interference channel, and estimate the response of the baseband self-interference channel according to the determined baseband self-interference channel estimation strategy.
  • the communication node can effectively improve the accuracy of the response of the estimated baseband self-interference channel.
  • the estimating the baseband self-interference channel response to obtain the first estimated response of the baseband self-interference channel comprises: estimating a response of the baseband self-interference channel by using a baseband estimation signal to obtain the first estimate. response.
  • the first baseband received signal may include a baseband received signal at a first time and a baseband received signal at a second time.
  • the first baseband received signal of the first time refers to the baseband signal received at the first time of the first full duplex communication.
  • the first baseband received signal at the second time refers to the baseband signal received at the second time of the first full duplex communication.
  • Determining the first parameter of the baseband self-interference channel comprising: determining a baseband signal transmitted at a first time and a processed signal at a first time, wherein the processed signal at the first time is the first to remove baseband self-interference The first baseband of the time receives the signal; the baseband signal transmitted at the second time and the processed signal of the second time are determined, wherein the processed signal at the second time is the first baseband received signal at the second time after the baseband self-interference is deleted Determining the first parameter according to the baseband signal transmitted at the first time, the processed signal at the first time, the baseband signal transmitted at the second time, and the processed signal at the second time, where the baseband self-interference channel The first parameter and the residue of the baseband self-interference deletion The power of the interference is proportional.
  • the first parameter can be determined according to the following formula:
  • ! ⁇ is the first parameter
  • Xl (n) is the baseband signal transmitted at the first time
  • y is the processed signal at the first time
  • x 2 (n) is the baseband signal transmitted at the second time
  • y 2 (n) is the processed signal of the second time.
  • 2 ( n )y 2 ( n ) represents the correlation coefficient at the second time; 3 ⁇ 4 ⁇ ( ⁇ ⁇ ;( ⁇ )
  • the correlation coefficient of the first time and the correlation coefficient of the second time are proportional to the power of the residual interference of the baseband self-interference channel.
  • the estimation strategy includes: stopping the first full-duplex communication and restarting estimating the response of the baseband self-interference channel.
  • the first time may be a time when the first full duplex communication is started, where the second time may be a time when the channel quality of the first full duplex communication is lower than the second preset threshold.
  • the channel quality may include any one or more of the following: a Signal-to-Interference plus Noise Ratio (SINR), a Channel Quality Indication (CQI), and the like.
  • the estimating the baseband self-interference channel response to obtain the first estimated response of the baseband self-interference channel comprises: estimating the baseband self-interference channel by using a baseband estimation signal of a first frequency domain density Responding to obtain a first estimated response of the baseband self-interference channel.
  • the power of the first residual interference is the power of residual interference of the baseband self-interference channel in the first full duplex communication.
  • the power of the first residual interference can be obtained by measurement.
  • the estimation strategy of the baseband self-interference channel if: determining that the baseband self-interference channel is estimated to use a second frequency domain density, where the first parameter is greater than a third preset threshold
  • the baseband estimation signal estimates the response of the self-interference channel, wherein the second frequency domain density is greater than the first frequency domain density; and when the first parameter is less than the third preset threshold, determining the baseband self-interference channel
  • the estimation strategy estimates the response of the self-interfering channel using the baseband estimate signal of the first frequency domain density. In other words, if the first parameter is less than the third preset threshold, the estimation strategy for maintaining the self-interference channel remains unchanged.
  • determining the first parameter of the baseband self-interference channel includes: determining the first residual The power of the disturbance; determining the power of the first residual interference as the first parameter.
  • the estimating the response of the baseband self-interference channel according to the estimation strategy comprises: using the second frequency domain density The baseband estimation signal estimates a response of the baseband self-interference channel to obtain a second estimated response; starting a second full duplex communication; and deleting baseband self-interference in the second baseband received signal according to the second estimated response, wherein the second baseband The received signal is a baseband signal received in the second full duplex communication; determining a power of the second residual interference; and determining whether to increase a frequency domain density of the baseband estimation signal according to the power of the second residual interference.
  • the power of the second residual interference is less than the third preset threshold, determining to keep the frequency domain density of the baseband estimation signal unchanged; if the power of the second residual interference is greater than the third preset threshold And determining a second parameter according to the power of the second residual interference and the power of the first residual interference.
  • the power of the second residual interference is the power of the residual interference of the baseband self-interference channel in the second full duplex communication.
  • the power of the second residual interference can be obtained by measurement.
  • the second parameter may be determined by using the following formula:
  • the frequency domain density of the baseband estimation signal includes: determining, in a case where the second parameter is greater than a fourth preset threshold, increasing a frequency domain density of the baseband estimation signal; wherein the second parameter is smaller than the fourth preset threshold In the case, it is determined that the baseband self-interference channel response is estimated using the baseband estimation signal of the first frequency domain density.
  • FIG. 2 is a schematic flowchart of a method for estimating a baseband self-interference channel response according to an embodiment of the present invention.
  • the embodiment shown in Figure 2 is a specific embodiment of the embodiment shown in Figure 1.
  • the embodiment shown in Figure 2 is an example of an LTE system. Those skilled in the art will appreciate that the method provided by the present invention can also be applied to other full duplex communication systems.
  • the communication node indicates that the user equipment in the service range is in an orthogonal frequency division multiplexing
  • the communication node may be a Femto Base Station.
  • the communication node estimates a response of the baseband self-interference channel on the OFDM symbol to obtain a first estimated response of the baseband self-interference channel.
  • the communication node transmits a baseband estimation signal x. After transmitting RF channel, receiving and receiving spatial channel, receiving RF channel and analog interference After the deletion, the communication node can receive the baseband signal y corresponding to the baseband estimation signal x.
  • the response of the baseband self-interference channel, n is noise.
  • the minimum estimated Mean Square Error (MMSE), Least Square (LS), etc. methods can be used to estimate the response of the baseband estimated self-interference channel.
  • the specific process of estimating the response of the baseband self-interference channel is well known to those skilled in the art and need not be described herein.
  • the communication node starts full-duplex communication, and uses a response of the estimated baseband self-interference channel to remove baseband self-interference in the baseband received signal, where the baseband received signal is received by the communication node in the full-duplex communication.
  • Baseband signal
  • the received baseband received signal includes a baseband signal sent by the opposite communication node and self-interference.
  • the communication node can simulate the self-interference using the first estimated response.
  • the communication node can use the simulated baseband self-interference to remove the baseband self-interference in the baseband received signal, so that the baseband signal transmitted by the opposite communication node can be obtained.
  • the communications node can determine a first parameter, wherein the first parameter is related to a baseband self-interference-removed residual interference power.
  • the first baseband received signal may include a baseband received signal at a first time and a baseband received signal at a second time.
  • the first baseband received signal of the first time is the baseband signal received at the first time of the first full duplex communication.
  • the first baseband received signal at the second time refers to the baseband signal received at the second time of the first full duplex communication.
  • the communication node determines a baseband signal transmitted at a first time and a processed signal at a first time, wherein the processed signal at the first time is a baseband received signal at a first time after self-interference is deleted; a baseband signal and a processed signal of a second time, wherein the processed signal of the second time is a baseband received signal after the second time after the self-interference is deleted; the baseband signal transmitted according to the first time, the first time
  • the processed signal, the baseband signal transmitted at the second time, and the processed signal at the second time determine the first parameter, wherein the first parameter is proportional to the power of the residual interference of the baseband self-interference removed.
  • the first time is a time for starting full-duplex communication
  • the second time is a time when a channel quality degradation value of the full-duplex communication is less than a second preset threshold, where the channel quality may include the following Any one or more of them: SINR, CQI, etc.
  • the communication node may further determine the first parameter by using other methods, as long as the determined first parameter and the baseband self-interference deletion residual are ensured.
  • the power of the interference is proportional.
  • the communication node may calculate on a plurality of data symbols and then average the values.
  • the specific method is as follows: ⁇ 2 ⁇ 2 - ⁇ ⁇
  • the communications node may directly measure the power of the residual interference of the baseband self-interference channel, and use the power of the residual interference as the first parameter.
  • determining an estimation strategy of the baseband self-interference channel is to stop full-duplex communication and restart estimating an aperture of the baseband self-interference channel.
  • the first preset threshold is determined according to a simulation test.
  • the communication node needs to re-estimate the response of the baseband self-interference channel and reduce the self-interference in the received signal using the newly estimated baseband self-interference channel response.
  • the communication node may determine the first parameter at an appropriate moment, and determine, according to the determined first parameter, whether the response of the baseband self-interference channel needs to be re-estimated, so as to ensure the estimation.
  • the accuracy of the baseband self-interference channel response that is, according to the method shown in FIG.
  • the communication node can select an appropriate time domain resource to transmit the baseband estimation signal for estimation of the response of the baseband self-interference channel. Furthermore, since the timing of determining the self-interference channel response is determined based on the first parameter, the full-duplex system using the method shown in FIG. 2 has a high flexibility. At the same time, the environmental changes in the full-duplex system can affect the residual interference of the baseband self-interference removal. The first parameter is related to the residual interference removed by the baseband self-interference. Therefore, the manner of determining the timing of estimating the response of the baseband self-interference channel by monitoring the first number can effectively adapt to changes in the environment in which the system is located.
  • the environment in which a wireless full-duplex system consisting of a home base station and a terminal served by the home base station may change frequently.
  • the scattering environment and multipath characteristics around the system are variable. Therefore, the method shown in FIG. 2 can be applied to a wireless full duplex system composed of a home base station and a corresponding terminal.
  • FIG. 3 is a schematic flowchart of a method for estimating a baseband self-interference channel response according to an embodiment of the present invention.
  • the embodiment shown in Figure 3 is a specific embodiment of the embodiment shown in Figure 1.
  • the embodiment shown in Figure 3 is an example of an LTE system. Those skilled in the art will appreciate that the method provided by the present invention can also be applied to other full duplex communication systems.
  • the communication node estimates the response of the baseband self-interference channel by using a baseband estimation signal of the first frequency domain density to obtain a first estimated response of the baseband self-interference channel.
  • the first frequency domain density refers to an adjacent self-interference pilot signal interval N1 subcarriers, where N1 is a positive integer.
  • the communication node transmits a baseband estimate signal x.
  • the baseband signal y corresponding to the baseband estimation signal X that the communication node can receive after being transmitted through the transmitting RF channel, the transceiving spatial channel, the receiving RF channel, and the analog interference.
  • the response of the baseband self-interference channel, n is noise.
  • MMSE Minimum estimated Mean Square Error
  • LS Least Square
  • the communication node starts a first full duplex communication, and the baseband self-interference in the first baseband received signal is deleted according to the first estimated response, where the first baseband received signal is the communication node.
  • the baseband signal received in the first full duplex communication is the baseband signal received in the first full duplex communication.
  • the received baseband received signal includes a baseband signal sent by the opposite communication node and self-interference.
  • the communication node can simulate the self-interference using the first estimated response.
  • the communication node can use the simulated baseband self-interference to remove the baseband self-interference in the baseband received signal, so that the baseband signal transmitted by the opposite communication node can be obtained.
  • the communication node determines power of the first residual interference, and determines that the power of the first residual interference is a first parameter.
  • the power of the first residual interference is the power of residual interference of the baseband self-interference channel in the first full duplex communication.
  • the power of the first residual interference can be obtained by measurement.
  • the communications node determines an estimation strategy of the baseband self-interference channel according to the first parameter. Specifically, if the first parameter is greater than the third preset threshold, the communication node determines that the baseband self-interference channel estimation strategy is to estimate the baseband self-interference channel response by using the second frequency domain density baseband estimation signal.
  • the second frequency domain density is greater than the first frequency domain density.
  • the second frequency domain density means that adjacent pilot signals are spaced N2 subcarriers, where N2 is a positive integer less than N1.
  • the communication node determines that the baseband self-interference channel estimation strategy is to estimate the baseband self-interference channel's mouthwise response using the first frequency domain density baseband estimation signal.
  • the communication node can preset a plurality of candidate frequency domain densities. If the first parameter is greater than the third preset threshold, the communications node may select a frequency domain that is greater than the first frequency domain density and smaller than other frequency domain densities from a preset plurality of candidate frequency domain densities Density is used as the second frequency domain density.
  • the communication node can also directly determine the second frequency domain density. For example, if the first self-interference channel parameter is greater than the third preset threshold, the communication node can directly reduce the sub-carriers between the baseband estimation signals.
  • the communication node may estimate the baseband self-interference channel according to the estimation strategy. the response to. Specifically, the communication node may perform steps 305 through 308 to estimate the response of the baseband self-interference channel and continue to adjust the frequency domain density of the baseband estimate signal.
  • the communication node estimates the response of the baseband self-interference channel using the baseband estimation signal of the second frequency domain density to obtain a second estimated response.
  • step 305 The specific process of step 305 is similar to step 301, and need not be described here.
  • the communication node starts a second full duplex communication, and deletes according to the second estimated response.
  • the baseband self-interference in the second baseband received signal wherein the second baseband received signal is a baseband signal received by the communications node in the second full duplex communication.
  • step 306 The specific process of step 306 is similar to step 302, and need not be described here.
  • the communication node determines power of the second residual interference.
  • the power of the second residual interference is the power of the residual interference of the baseband self-interference channel in the second full duplex communication.
  • the power of the second residual interference can be obtained by measurement.
  • the interval T between the time at which the power of the second residual interference is determined and the time at which the power of the first residual interference is determined may be fixed, or may be dynamically determined based on the response of the baseband self-interference channel or the power of the residual interference.
  • the communications node determines, according to the power of the second residual interference, whether to maintain the frequency domain density of the baseband estimation signal unchanged.
  • the communication node may determine to keep the frequency domain density of the baseband estimation signal unchanged, that is, continue to use the pilot of the second frequency domain density.
  • the signal estimates the response of the baseband self-interference channel.
  • the communications node may determine the second parameter according to the power of the second residual interference and the power of the first residual interference, and according to the second self-interference
  • the channel parameters determine whether to increase the frequency domain density of the baseband estimate signal.
  • the communication node can determine the second parameter using the following formula:
  • determining whether to increase the The frequency domain density of the baseband estimation signal includes: determining, in a case where the second parameter is greater than a fourth preset threshold, increasing a frequency domain density of the baseband estimation signal; if the second parameter is smaller than the fourth preset threshold Determining, by using a baseband estimation signal of the first frequency domain density, estimating a response of the baseband self-interference channel.
  • the communication node may directly select a frequency domain from the candidate frequency domain density.
  • the communication node can also directly increase the frequency domain density of the baseband estimation signal. That is, the communication node can be reduced between The baseband estimates the subcarriers between the signals.
  • the communication node may further increase the frequency domain density of the baseband estimation signal.
  • the frequency domain density of the baseband estimation signal determined in step 308 is equivalent to the second frequency domain density in step 304.
  • the process of increasing the frequency domain density of the baseband estimate signal is similar to steps 305 through 308.
  • the frequency domain density of the baseband estimation signal cannot be greater than the maximum frequency domain density.
  • the maximum frequency domain density refers to the adjacent baseband estimation signal interval N min subcarriers, where N min satisfies the following condition: In the case where the adjacent baseband estimation signal interval is N min subcarriers, the residual interference power is greater than the third preset Threshold; in the case where the adjacent baseband estimated signal interval is (N min -1 ) subcarriers, the residual power is less than the third preset threshold.
  • the communication node can gradually increase the frequency domain density of the baseband estimation signal when performing full-duplex communication, so as to ensure the accuracy of the estimated baseband self-interference channel response. That is, according to the method shown in Fig. 3, the communication node can select a suitable frequency domain resource to transmit a baseband estimation signal for estimation of the response of the baseband self-interference channel.
  • the full-duplex system using the method shown in Fig. 3 is highly flexible.
  • environmental changes in the full-duplex system can affect residual interference removed from interference.
  • the first parameter is the power of the residual interference and the second parameter is related to the power of the residual interference.
  • determining whether to adjust the frequency domain density of the baseband estimation signal can effectively adapt to changes in the environment in which the system is located by monitoring the power of the residual interference.
  • the environment in which a wireless full-duplex system consisting of a home base station and a terminal served by the home base station may change frequently.
  • the scattering environment and multipath characteristics around the system are variable. Therefore, the method shown in Fig. 3 can be applied to a wireless full duplex system composed of a home base station and a corresponding terminal.
  • FIG. 4 is a structural block diagram of an apparatus according to an embodiment of the present invention.
  • the apparatus 400 shown in FIG. 4 may be located on a communication node, which may be a fixed terminal or a mobile terminal, and the communication node may also be a network node such as a base station or a network.
  • the device 400 includes a control unit 401 and a communication unit 402.
  • the control unit 401 is configured to estimate a response of the baseband self-interference channel to obtain a first estimated response of the baseband self-interference channel.
  • the communication unit 402 is configured to perform first full duplex communication.
  • the communication unit 402 is specifically configured to transmit a baseband signal and receive the baseband signal. Specifically, the transceiver unit 402 receives the radio frequency signals transmitted by the other communication nodes, and converts the received radio frequency signals into baseband signals.
  • the control unit 401 is further configured to: perform baseband self-interference in the first baseband received signal according to the first estimated response, where the first baseband received signal is a baseband received by the communication unit 402 in the first full-duplex communication signal.
  • the control unit 401 is further configured to determine a first parameter of the baseband self-interference channel, where the first parameter is related to residual interference of the baseband self-interference channel.
  • the control unit 401 is further configured to determine an estimation strategy of the baseband self-interference channel according to the first parameter.
  • the control unit 401 is further configured to estimate a response of the baseband self-interference channel according to the estimation strategy.
  • the apparatus 400 shown in FIG. 4 is capable of determining a corresponding baseband self-interference channel estimation strategy according to a first parameter of a baseband self-interference channel, and estimating a baseband self-interference channel response according to the determined baseband self-interference channel estimation strategy.
  • device 400 can effectively improve the accuracy of the estimated baseband self-interference channel response.
  • the control unit 401 is configured to use a baseband estimation signal to estimate a response of the attack point self-interference channel to obtain the first estimated response of the baseband self-interference.
  • the communication unit 402 is configured to transmit the baseband estimation signal X and receive the baseband signal y corresponding to the baseband estimation signal X.
  • the control unit 401 is specifically configured to estimate a baseband self-interference response according to the baseband estimation signal X and the baseband signal y.
  • the control unit 401 can determine the first parameter according to the first baseband received signal from which the baseband self-interference is deleted.
  • control unit 401 is specifically configured to determine a baseband signal transmitted at a first time and a processed signal at a first time, where the processed signal at the first time is the first time after the self-interference of the baseband is deleted.
  • a baseband receiving signal determining a baseband signal transmitted at a second time and a processed signal at a second time, wherein the processed signal at the second time is a first baseband received signal at a second time after the self-interference of the baseband is deleted, Determining the first parameter according to the baseband signal transmitted at the first time, the processed signal of the first time, the baseband signal of the second time, and the processed signal of the second time, where the first parameter is related to the baseband
  • the power of the residual interference of the interference channel is proportional.
  • control unit 401 is specifically configured to determine the first parameter according to the following formula,
  • ⁇ is the first parameter
  • Xl (n) is the baseband signal transmitted at the first time
  • y is the baseband received signal at the first time
  • x 2 (n) is the baseband signal transmitted at the second time
  • y 2 (n) is the baseband received signal for the second time.
  • 2 (n) y 2 (n) denotes the correlation coefficient at the second time
  • ( n ) denotes the correlation coefficient at the first time.
  • the control unit 401 may further determine the first parameter by other means, as long as the determined first parameter and the baseband self-interference deletion residual are ensured.
  • the power of the interference is proportional.
  • the control unit 401 may calculate on a plurality of data symbols and then take an average.
  • ⁇ The following formula shows: ⁇ 2 ⁇ 2 - ⁇ ⁇
  • the control unit 401 can also directly measure the power of the residual interference of the baseband self-interference channel, and use the power of the residual interference as the first parameter.
  • the first time may be a time when the first full duplex communication is started
  • the second time may be a time when a decrease value of the channel quality of the first full duplex communication is less than a second preset threshold, where
  • the channel quality may include any one or more of the following: SINR, CQI, and the like.
  • control unit 401 is specifically configured to estimate a response of the baseband self-interference channel by using a baseband estimation signal of a first frequency domain density.
  • the communication unit 402 is configured to transmit a baseband estimation signal X of the first frequency domain density and receive a baseband signal corresponding to the baseband estimation signal X.
  • the control unit 401 is specifically configured to estimate a baseband self-interference response according to the baseband estimation signal X of the first frequency domain density and the baseband signal y.
  • the control unit 401 is specifically configured to determine the power of the first residual interference, and determine the power of the first residual interference as the first parameter.
  • the power of the first residual interference is the power of residual interference of the baseband self-interference channel in the first full duplex communication.
  • the power of the first residual interference may be determined by the control unit 401 by measurement.
  • the control unit 401 is specifically configured to: when the first parameter is greater than the third preset threshold, determine an estimation strategy of the baseband self-interference channel to estimate a response of the baseband self-interference channel by using a baseband estimation signal of a second frequency domain density.
  • the second frequency domain density is greater than the first frequency domain density. If the first parameter is smaller than the third preset threshold, determining an estimation strategy of the baseband self-interference channel is to use the first frequency domain density.
  • the baseband estimate signal estimates the response of the baseband self-interference channel.
  • control unit 401 is further configured to estimate the response of the baseband self-interference channel by using the baseband estimation signal of the second frequency domain density to obtain a second estimated response.
  • the communication unit 402 A baseband estimation signal x2 for transmitting a second frequency domain density and receiving a baseband signal y2 corresponding to the baseband estimation signal x2 of the second frequency domain density.
  • the control unit 401 is specifically configured to estimate a baseband self-interference response according to the baseband signal x2 and the baseband signal y2.
  • the communication unit 402 is further configured to perform second full duplex communication.
  • the control unit 401 is further configured to delete the baseband self-interference in the second baseband received signal according to the second estimated response, where the second baseband received signal is the baseband signal received in the second full-duplex communication.
  • the control unit 401 is further configured to determine the power of the second residual interference.
  • the power of the second residual interference is the power of residual interference of the baseband self-interference channel in the second full duplex communication.
  • the power of the second residual interference may be determined by the control unit 401 by measurement.
  • the control unit 401 is further configured to: when the power of the second residual interference is less than the third preset threshold, determine to keep the frequency domain density of the baseband estimation signal unchanged.
  • the control unit 401 is further configured to: determine, according to the power of the second residual interference and the power of the first residual interference, a second parameter according to the power, where the power of the second residual interference is greater than the third preset threshold The second parameter determines whether to increase the frequency domain density of the baseband estimation signal.
  • the control unit 401 can determine the second parameter using the following formula:
  • R 2 P "P 2 , Equation 1.9 where 1 2 is the second parameter, which is the power of the first residual interference, and P 2 is the power of the second residual interference.
  • the control unit 401 is specifically configured to: when the second parameter is greater than the fourth preset threshold, determine to increase a frequency domain density of the baseband estimation signal; and if the second parameter is smaller than the fourth preset threshold, determine The baseband self-interference channel response is estimated using a baseband estimate signal of the first frequency domain density.
  • the control unit 401 may directly select a frequency domain density from the candidate frequency domain density, wherein the selected frequency domain density is greater than the second frequency domain density and smaller than other frequency domains. density.
  • Control unit 401 can also directly increase the frequency domain density of the baseband estimate signal. That is, the control unit 401 can reduce the subcarriers between the baseband estimation signals.
  • FIG. 5 is a structural block diagram of an apparatus according to an embodiment of the present invention.
  • the apparatus 500 shown in FIG. 5 may be located on a communication node, which may be a fixed terminal or a mobile terminal, and the communication node may also be a network node such as a base station or an AP.
  • apparatus 500 includes a processor 501 and a transceiver 502.
  • the processor 501 is configured to estimate a response of the baseband self-interference channel to obtain a first estimated response of the baseband self-interference channel.
  • the transceiver 502 is configured to perform first full duplex communication.
  • Transceiver 502 can be used to transmit baseband signals and receive baseband signals. Specifically, the transceiver 502 receives the radio frequency signal sent by the other communication node, and converts the received radio frequency signal into a baseband signal.
  • the processor 501 is further configured to: perform baseband self-interference in the first baseband received signal according to the first estimated response, where the first baseband received signal is a baseband received by the transceiver 502 in the first full-duplex communication signal.
  • the processor 501 is further configured to determine a first parameter of the baseband self-interference channel, wherein the first parameter is related to residual interference of the baseband self-interference channel.
  • the processor 501 is further configured to determine, according to the first parameter, an estimation strategy of the baseband self-interference channel.
  • the processor 501 is further configured to estimate a response of the baseband self-interference channel according to the estimation strategy.
  • the apparatus 500 shown in FIG. 5 is capable of determining a corresponding baseband self-interference channel estimation strategy according to a first parameter of a baseband self-interference channel, and estimating a baseband self-interference channel response according to the determined baseband self-interference channel estimation strategy.
  • device 500 can effectively improve the accuracy of the estimated baseband self-interference channel response.
  • the processor 501 is configured to estimate a response of the baseband self-interference channel by using a baseband estimation signal to obtain a first estimated response of the baseband self-interference channel.
  • the transceiver 502 is configured to transmit a baseband estimation signal X and receive a baseband signal y corresponding to the baseband estimation signal X.
  • the processor 501 is specifically configured to estimate a baseband self-interference response according to the baseband signal X and the baseband signal y.
  • the processor 501 can determine the first parameter based on the first baseband received signal with the baseband self-interference removed.
  • the processor 501 is specifically configured to determine a baseband signal transmitted at a first time and a processed signal at a first time, where the processed signal at the first time is the first time after the self-interference of the baseband is deleted.
  • a baseband receiving signal determining a baseband signal transmitted at a second time and a processed signal at a second time, wherein the processed signal at the second time is a first baseband received signal at a second time after the self-interference of the baseband is deleted, Determining the first parameter according to the baseband signal transmitted at the first time, the processed signal of the first time, the baseband signal of the second time, and the processed signal of the second time, where the first parameter is related to the baseband
  • the power of the residual interference of the interference channel is proportional.
  • processor 501 is specifically configured to determine the first parameter according to the following formula,
  • R 1 ⁇ x 2 (n) y 2 (n) - ⁇ x 1 (n) yi(n) , Equation 1.10 among them, ! ⁇ is the first parameter, Xl (n) is the baseband signal transmitted at the first time, y; (n) is the baseband received signal at the first time, and x 2 (n) is the baseband signal transmitted at the second time , y 2 (n) is the baseband received signal for the second time.
  • 2 (n) y 2 (n) denotes the correlation coefficient at the second time,
  • the processor 501 may determine the first parameter by other means, as long as the determined first parameter is proportional to the power of the residual interference of the baseband self-interference deletion. For example, when calculating the correlation coefficient of the first time and the correlation coefficient of the second time, the processor 501 may calculate on a plurality of data symbols and then average the values.
  • the specific method is as
  • ⁇ is the first parameter
  • Xl ( ni ) is the value of the baseband signal transmitted at the first time on the iiith data symbol
  • y is the baseband received signal at the first time in the iiith data symbol the value
  • x 2 (ni) for a second time the value of a baseband signal transmitted on the second data symbols
  • y 2 (ni) a second value of the base band received signal at the time of data symbols for the ni
  • i is a positive integer.
  • the processor 501 can also directly measure the power of the residual interference of the baseband self-interference channel, and use the power of the residual interference as the first parameter.
  • the first time may be a time when the first full duplex communication is started
  • the second time may be a time when a decrease value of the channel quality of the first full duplex communication is less than a second preset threshold, where
  • the channel quality may include any one or more of the following: SINR, CQI, and the like.
  • the processor 501 is specifically configured to estimate a response of the baseband self-interference channel by using a baseband estimation signal of a first frequency domain density.
  • the transceiver 502 is configured to transmit a baseband estimation signal X of the first frequency domain density and receive a baseband signal y corresponding to the baseband estimation signal X of the first frequency domain density.
  • the processor 501 is specifically configured to estimate a baseband self-interference response according to the baseband signal X and the baseband signal y.
  • the processor 501 is specifically configured to estimate a baseband self-interference response according to the baseband signal X and the baseband signal y.
  • the processor 501 is specifically configured to determine a power of the first residual interference, and determine that the power of the first residual interference is the first parameter.
  • the power of the first residual interference is the power of residual interference of the baseband self-interference channel in the first full-duplex communication.
  • the first The power of a residual interference may be determined by the processor 501 by measurement.
  • the processor 501 is configured to: when the first parameter is greater than the third preset threshold, determine an estimation strategy of the baseband self-interference channel to estimate a response of the baseband self-interference channel by using a baseband estimation signal of a second frequency domain density. The second frequency domain density is greater than the first frequency domain density. If the first parameter is smaller than the third preset threshold, determining an estimation strategy of the baseband self-interference channel is to use the first frequency domain density.
  • the baseband estimate signal estimates the response of the baseband self-interference channel.
  • the processor 501 is further configured to estimate a response of the baseband self-interference channel by using the baseband estimation signal of the second frequency domain density to obtain a second estimated response.
  • the transceiver 502 is configured to transmit a baseband estimation signal x2 of the second frequency domain density and receive a baseband signal y2 corresponding to the baseband estimation signal x2 of the second frequency domain density.
  • the processor 501 is specifically configured to estimate a baseband self-interference response according to the baseband signal x2 and the baseband signal y2.
  • Transceiver 502 is also used to perform second full duplex communication.
  • the processor 501 is further configured to delete the baseband self-interference in the second baseband received signal according to the second estimated response, wherein the second baseband received signal is a baseband signal received in the second full-duplex communication.
  • the processor 501 is further configured to determine the power of the second residual interference.
  • the power of the second residual interference is the power of the residual interference of the baseband self-interference channel in the second full duplex communication.
  • the power of the second residual interference may be determined by the processor 501 by measurement.
  • the processor 501 is further configured to determine that the frequency domain density of the baseband estimation signal is kept unchanged if the power of the second residual interference is less than the third preset threshold.
  • the processor 501 is further configured to: determine, according to the power of the second residual interference and the power of the first residual interference, a second parameter, according to the first, if the power of the second residual interference is greater than the third preset threshold
  • the second parameter determines whether to increase the frequency domain density of the baseband estimation signal.
  • the processor 501 can determine the second parameter using the following formula:
  • R 2 P "P 2 , Equation 1.12 where, 1 2 is the second parameter, which is the power of the first residual interference, and P 2 is the power of the second residual interference.
  • the processor 501 is configured to: when the second parameter is greater than the fourth preset threshold, determine to increase a frequency domain density of the baseband estimation signal; and if the second parameter is smaller than the fourth preset threshold, determine The baseband self-interference channel response is estimated using a baseband estimate signal of the first frequency domain density.
  • the processor 501 may directly select a frequency domain density from the candidate frequency domain density, wherein the selected frequency domain density is greater than the second frequency domain density and smaller than other frequency domains. density.
  • Processor 501 can also directly increase the frequency domain density of the baseband estimate signal. and also That is, the processor 501 can reduce the subcarriers between the baseband estimation signals.
  • 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 coupling or communication connection through some interface, device or unit, and may be in electrical, mechanical or other form.
  • 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. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • 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 functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor 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 mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access).

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明提供估计自干扰信道响应的方法和装置，包括：估计基带自干扰信道的响应以获取该基带自干扰信道的第一估计响应；开始进行第一全双工通信；根据该第一估计响应，删除第一基带接收信号中的基带自干扰，其中该第一基带接收信号是在该第一全双工通信中接收到的基带信号；确定该基带自干扰信道的第一参数；根据该第一参数，确定该基带自干扰信道的估计策略，根据该估计策略，估计该基带自干扰信道的响应。通信节点能够根据基带自干扰信道的第一参数，确定相应的基带自干扰信道估计策略，并根据确定的基带自干扰信道的估计策略估计基带自干扰信道的响应。这样，通信节点可以有效地提高估计的基带自干扰信道的响应的精度。

Description

估计基带自干扰信道响应的方法和装置 技术领域
本发明实施例涉及通信技术领域， 并且更具体地， 涉及估计基带自干扰 信道响应的方法和装置。 背景技术
无线全双工技术实现了两个通信节点在相同的时频资源上进行双向信 号的传输。 也就是说， 支持无线全双工的通信节点可以使用相同的时频资源 进行上下行传输。 但是， 在使用无线全双工技术进行通信时， 通信节点的发 射信号会对该通信节点的接收信号进行干扰。 这种干扰称为自干扰 ( self-interference )。该通信节点的基带的发射模块与基带的接收模块之间的 信道称为基带自干扰信道。 具体来说， 该基带自干扰信道可以包括： 发射射 频通道响应、 空间信道、 射频电路的回波反射的泄漏的信道响应、 模拟干扰 删除和接收射频通道信道响应的级联。 进一步， 在该通信节点釆用环形器的 情况下， 该基带自干扰信道还可以包括环形器的信道响应。
为了减少自干扰对有用信号的正确接收造成的影响， 支持无线全双工的 通信节点需要删除自干扰。 删除自干扰的方法包括以下中的一种或多种： 天 线隔离， 模拟干扰删除以及数字干扰删除。
数字干扰删除过程包括： 支持无线全双工的通信节点可以估计该通信节 点的基带自干扰信道的响应； 该通信节点利用该估计的基带自干扰信道的响 应重构基带的自干扰， 然后将重构的基带自干扰与实际的基带自干扰相减。 相减的结果称为基带自干扰信道的残留干扰， 简称残留干扰。 具体地， 可以 如公式 1.1所示：
r = Xrx - x;x , 公式 1.1 其中， r表示残留干扰， χ„表示实际的基带自干扰， 表示重构的基带 自干扰。 进一步， XfX = hx， 其中， h表示基带自干扰信道的响应， X表示基 带的发射信号。 x:x = h x， 其中， h'表示估计的基带自干扰信道的响应。
用于估计基带自干扰信道的响应的信号简称为基带估计信号。该基带估 计信号可以是该通信节点的基带信号。用于发送该基带估计信号的时域资源 和频域资源会影响估计的基带自干扰信道的响应的精度。 因此， 通过为发送 该基带估计信号选择合适的时域资源或频域资源可以提高估计的基带自干 扰信道的响应的精度。 发明内容
本发明实施例提供估计基带自干扰信道响应的方法和装置， 能够有效地 提高估计的基带自干扰信道响应的精度。
第一方面， 本发明实施例提供一种估计基带自干扰信道的响应的方法， 该方法包括： 估计基带自干扰信道的响应以获取该基带自干扰信道的第一估 计响应； 开始进行第一全双工通信； 根据该第一估计响应， 删除第一基带接 收信号中的基带自干扰，其中该第一基带接收信号是在该第一全双工通信中 接收到的基带信号； 确定该基带自干扰信道的第一参数， 其中该第一参数与 该基带自干扰信道的残留干扰相关； 根据该第一参数， 确定该基带自干扰信 道的估计策略； 根据该估计策略， 估计该基带自干扰信道的响应。
结合第一方面， 在第一种可能的实现方式中， 该第一基带接收信号包括 第一时间的第一基带接收信号和第二时间的第一基带接收信号； 该确定该基 带自干扰信道的第一参数， 包括： 确定第一时间发射的基带信号与第一时间 的已处理信号， 其中该第一时间的已处理信号是删除了该基带自干扰后的该 第一时间的第一基带接收信号； 确定第二时间发射的基带信号与第二时间的 已处理信号， 其中该第二时间的已处理信号是删除了该基带自干扰后的该第 二时间的第一基带接收信号； 根据该第一时间发射的基带信号、 该第一时间 的已处理信号、该第二时间发射的基带信号以及该第二时间的已处理信号确 定该第一参数， 其中该第一参数与该基带自干扰信道的残留干扰的功率成正 比。
结合第一种可能的实现方式， 在第二种可能的实现方式中， 该根据该第 一时间发射的基带信号、 该第一时间的已处理信号、 该第二时间发射的基带 信号以及该第二时间的已处理信号确定该第一参数， 包括： 根据以下公式确 定该第一参数： = 2 (0») - ») ^ 1)，其中， ！^为该第一参数， Xl (n) n-1 n-1
为该第一时间发射的基带信号， y;(n)为该第一时间的基带接收信号， x2 (n)为 该第二时间发射的基带信号， y2(n)为该第二时间的基带接收信号。
结合第一种可能的实现方式或第二种可能的实现方式，在第三种可能的 实现方式中，该根据该第一参数，确定该基带自干扰信道的估计策略， 包括： 在该第一参数大于第一预设门限的情况下，确定停止进行该第一全双工通信 并重新开始估计该基带自干扰信道的响应。
结合第一种可能的实现方式至第三种可能的实现方式中的任一种可能 的实现方式， 在第四种可能的实现方式中， 该第一时间为开始进行该第一全 双工通信的时间，该第二时间为该第一全双工通信的信道质量的下降值小于 第二预设门限的时间。
结合第一方面， 在第五种可能的实现方式中， 该估计基带自干扰信道的 响应以获取该基带自干扰信道的第一估计响应， 包括： 使用第一频域密度的 基带估计信号估计该基带自干扰信道的响应； 该根据该第一参数， 确定该基 带自干扰信道的估计策略，包括：在该第一参数大于第三预设门限的情况下， 确定该基带自干扰信道的估计策略为使用第二频域密度的基带估计信号估 计该基带自干扰信道的响应， 其中该第二频域密度大于该第一频域密度； 在 该第一参数小于该第三预设门限的情况下，确定该基带自干扰信道的估计策 略为使用该第一频域密度的基带估计信号估计该基带自干扰信道的响应。
基站第五种可能的实现方式， 在第六种可能的实现方式中， 该确定该基 带自干扰信道的第一参数， 包括： 确定第一残留干扰的功率； 确定该第一残 留干扰的功率为该第一参数。
结合第五种可能的实现方式或第六种可能的实现方式，在第七种可能的 实现方式中，在该确定该基带自干扰信道的估计策略为使用第二频域密度的 基带估计信号估计该基带自干扰信道的响应的情况下， 该根据该估计策略， 估计该基带自干扰信道的响应包括： 使用该第二频域密度的基带估计信号估 计该基带自干扰信道的响应以获取第二估计响应； 开始进行第二全双工通 信； 根据该第二估计响应， 删除第二基带接收信号中的基带自干扰， 其中该 第二基带接收信号是在该第二全双工通信中接收到的基带信号； 确定第二残 留干扰的功率； 在该第二残留干扰的功率小于该第三预设门限的情况下， 确 定保持该基带估计信号的频域密度不变； 在该第二残留干扰的功率大于该第 三预设门限的情况下， 根据该第二残留干扰的功率与该第一残留干扰的功 率， 确定第二参数， 根据该第二参数， 确定是否增加该基带估计信号的频域 密度。
结合第七种可能的实现方式， 在第八种可能的实现方式中， 该根据该第 二残留干扰的功率与该第一残留干扰的功率， 确定第二参数， 包括： 釆用以 下公式确定该第二自干扰信道参数： R^ Pi - P^ 其中， 1 2为该第二参数， 为该第一残留干扰的功率， P2为该第二残留干扰的功率。
结合第八种可能的实现方式， 在第九种可能的实现方式中， 该根据该第 二参数， 确定是否增加该基带估计信号的频域密度， 包括： 在该第二参数大 于第四预设门限的情况下， 确定增加该基带估计信号的频域密度； 在该第二 参数小于该第四预设门限的情况下，确定保持该基带估计信号的频域密度不 变。
第二方面， 本发明实施例提供一种装置， 该装置包括： 控制单元， 用于 估计基带自干扰信道的响应以获取该基带自干扰信道的第一估计响应； 通信 单元，用于进行第一全双工通信； 该控制单元，还用于根据该第一估计响应， 删除第一基带接收信号中的基带自干扰，其中该第一基带接收信号是该通信 单元在该第一全双工通信中接收到的基带信号； 该控制单元， 还用于确定该 基带自干扰信道的第一参数， 其中该第一参数与该基带自干扰信道的残留干 扰的功率相关； 该控制单元， 还用于根据该第一参数， 确定该基带自干扰信 道的估计策略； 该控制单元， 还用于根据该估计策略， 估计该基带自干扰信 道的响应。
结合第二方面， 在第一种可能的实现方式中， 该控制单元， 具体用于确 定第一时间发射的基带信号与第一时间的已处理信号，其中该第一时间的已 处理信号是删除了该基带自干扰后的该第一时间的第一基带接收信号，确定 第二时间发射的基带信号与第二时间的已处理信号， 其中该第二时间的已处 理信号是删除了该基带自干扰后的该第二时间的第一基带接收信号，根据该 第一时间发射的基带信号、 该第一时间的已处理信号、 该第二时间发射的基 带信号以及该第二时间的已处理信号确定该第一参数，其中该第一参数与该 基带自干扰信道的残留干扰的功率成正比。
结合第一种可能的实现方式，在第二种可能的实现方式中，该控制单元， 具体用于根据以下公式确定该第一参数： , 其
Figure imgf000006_0001
中， ！^为该第一参数， Xl (n)为该第一时间发射的基带信号， y;(n)为该第一 时间的基带接收信号， x2 (n)为该第二时间发射的基带信号， y2(n)为该第二 时间的基带接收信号。
结合第一种可能的实现方式或第二种可能的实现方式，在第三种可能的 实现方式中， 该控制单元， 具体用于在该第一参数大于第一预设门限的情况 下，确定停止进行该第一全双工通信并重新开始估计该基带自干扰信道的响 应。
结合第二方面， 在第四种可能的实现方式中， 该控制单元， 具体用于使 用第一频域密度的基带估计信号估计该基带自干扰信道的响应； 该控制单 元， 具体用于在该第一参数大于第三预设门限的情况下， 确定该基带自干扰 信道的估计策略为使用第二频域密度的基带估计信号估计该基带自干扰信 道的响应， 其中该第二频域密度大于该第一频域密度， 在该第一参数小于该 第三预设门限的情况下，确定该基带自干扰信道的估计策略为使用该第一频 域密度的基带估计信号估计该基带自干扰信道的响应。
结合第四种可能的实现方式，在第五种可能的实现方式中，该控制单元， 具体用于确定第一残留干扰的功率，确定该第一残留干扰的功率为该第一参 数。
结合第四种可能的实现方式或第五种可能的实现方式，在第六种可能的 实现方式中， 该控制单元， 还用于使用该第二频域密度的基带估计信号估计 该基带自干扰信道的响应以获取第二估计响应； 该通信单元， 还用于开始第 二全双工通信； 该控制单元， 还用于根据该第二估计响应， 删除第二基带接 收信号中的基带自干扰， 其中该第二基带接收信号是在该第二全双工通信中 接收到的基带信号； 该控制单元， 还用于确定第二残留干扰的功率； 该控制 单元， 还用于在该第二残留干扰的功率小于该第三预设门限的情况下， 确定 保持该基带估计信号的频域密度不变； 该控制单元， 还用于在该第二残留干 扰的功率大于该第三预设门限的情况下，根据该第二残留干扰的功率与该第 一残留干扰的功率， 确定第二参数， 根据该第二参数， 确定是否增加该基带 估计信号的频域密度。
结合第六种可能的实现方式，在第七种可能的实现方式中，该控制单元， 具体用于釆用以下公式确定该第二参数： 1 2 = - ， 其中， R2为该第二参 数， 为该第一残留干扰的功率， P2为该第二残留干扰的功率。
结合第七种可能的实现方式，在第八种可能的实现方式中，该控制单元， 具体用于在该第二参数大于第四预设门限的情况下，确定增加该基带估计信 号的频域密度， 在该第二参数小于该第四预设门限的情况下， 确定使用该第 一频域密度的基带估计信号估计该基带自干扰信道的响应。
结合第二方面或上述任一种可能的实现方式，在第九种可能的实现方式 中， 该装置应用于终端或网络节点， 该终端包括移动终端和固定终端， 该网 络节点包括基站和接入点。
上述技术方案中， 通信节点能够根据基带自干扰信道的第一参数， 确定 相应的基带自干扰信道估计策略， 并根据确定的基带自干扰信道的估计策略 估计基带自干扰信道的响应。 这样， 通信节点可有效地提高估计的基带自干 扰信道的响应的精度。 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是根据本发明实施例提供的估计基带自干扰信道的响应的方法的示 意性流程图。
图 2是根据本发明实施例提供的估计基带自干扰信道响应的方法的示意 性流程图。
图 3是根据本发明实施例提供的估计基带自干扰信道响应的方法的示意 性流程图。
图 4是根据本发明实施例提供的装置的结构框图。
图 5是根据本发明实施例提供的装置的结构框图。 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。
应理解， 本发明实施例的技术方案可以应用于各种全双工通信系统。 本 发明实施例中所提到的通信节点均支持无线全双工系统。本发明实施例中所 提到通信节点可以是用户设备， 也可以是基站、 接入点 （ Access Point, AP ) 等网络节点。 用户设备（ User Equipment， UE )可以经无线接入网 （例如， Radio Access Network, RAN )与一个或多个核心网进行通信， 用户设备可以 是固定终端， 也可以是移动终端， 如移动电话（或称为"蜂窝"电话）和具有 移动终端的计算机， 例如， 可以是便携式、 袖珍式、 手持式、 计算机内置的 或者车载的移动装置。
图 1是根据本发明实施例提供的估计基带自干扰信道的响应的方法的示 意性流程图。
101， 估计基带自干扰信道的响应以获取该基带自干扰信道的第一估计 口向应。
102, 开始进行第一全双工通信。
103， 根据该第一估计响应， 删除第一基带接收信号中的基带自干扰， 其中该第一基带接收信号是在该第一全双工通信中接收到的基带信号。
104， 确定该基带自干扰信道的第一参数， 其中该第一参数与基带自干 扰信道的残留干扰相关；
105， 根据该第一参数， 确定该基带自干扰信道的估计策略。
106， 根据该估计策略， 估计该基带自干扰信道的响应。
根据图 1所示的方法， 通信节点能够根据基带自干扰信道的第一参数， 确定相应的基带自干扰信道估计策略， 并根据确定的基带自干扰信道的估计 策略估计基带自干扰信道的响应。 这样， 通信节点可以有效地提高估计的基 带自干扰信道的响应的精度。
可选的， 作为一个实施例， 该估计基带自干扰信道的响应以获取该基带 自干扰信道的第一估计响应， 包括： 使用基带估计信号估计该基带自干扰信 道的响应以获取该第一估计响应。该第一基带接收信号可以包括第一时间的 基带接收信号和第二时间的基带接收信号。该第一时间的第一基带接收信号 是指在该第一全双工通信的第一时间接收到的基带信号。该第二时间的第一 基带接收信号是指在该第一全双工通信的第二时间接收到的基带信号。该根 据确定该基带自干扰信道的第一参数， 包括： 确定第一时间发射的基带信号 与第一时间的已处理信号，其中该第一时间的已处理信号是删除了基带自干 扰的第一时间的第一基带接收信号； 确定第二时间发射的基带信号与第二时 间的已处理信号，其中该第二时间的已处理信号是删除了基带自干扰的第二 时间的第一基带接收信号； 根据该第一时间发射的基带信号、 该第一时间的 已处理信号、 该第二时间发射的基带信号以及该第二时间的已处理信号， 确 定该第一参数， 其中该基带自干扰信道的第一参数与基带自干扰删除的残留 干扰的功率成正比。
具体地， 可以根据以下公式确定该第一参数：
Ri =∑x 2(n)y2(n) -∑xi (n)yi(n)， 公式 I·2 -l -1
其中， ！^为该第一参数， Xl (n)为该第一时间发射的基带信号， y;(n)为 该第一时间的已处理信号， x2 (n)为该第二时间发射的基带信号， y2(n)为该 第二时间的已处理信号。 | 2 (n)y2(n)表示第二时间的相关系数，；¾Χι(η^;(η)
-l -l
表示第一时间的相关系数。该第一时间的相关系数和该第二时间的相关系数 与基带自干扰信道的残留干扰的功率成正比。
该根据该第一参数， 确定该基带自干扰信道的估计策略， 包括： 在该第 一参数大于第一预设门限的情况下，确定该基带自干扰信道的估计策略为停 止进行该第一全双工通信并重新开始估计基带自干扰信道的响应。在此情况 下， 该根据该估计策略， 估计该基带自干扰信道的响应， 包括： 停止进行该 第一全双工通信并重新开始估计该基带自干扰信道的响应。 可选的， 该第一 时间可以是开始进行该第一全双工通信的时间， 该第二时间可以是该第一全 双工通信的信道质量的下降值小于第二预设门限的时间， 其中该信道质量可 以包括以下中的任一个或多个： 信干躁比 （ Signal-to-Interference plus Noise Ratio, SINR )、 信道质量指示 （ Channel Quality Indication, CQI )等。
可选的， 作为另一个实施例， 该估计基带自干扰信道的响应以获取该基 带自干扰信道的第一估计响应， 包括： 使用第一频域密度的基带估计信号估 计该基带自干扰信道的响应以获取该基带自干扰信道的第一估计响应。该第 一残留干扰的功率是第一全双工通信中的该基带自干扰信道的残留干扰的 功率。 该第一残留干扰的功率可以通过测量得到。 该根据该第一参数， 确定 该基带自干扰信道的估计策略， 包括： 在该第一参数大于第三预设门限的情 况下，确定该基带自干扰信道的估计策略为使用第二频域密度的基带估计信 号估计该自干扰信道的响应， 其中该第二频域密度大于该第一频域密度； 在 该第一参数小于该第三预设门限的情况下，确定该基带自干扰信道的估计策 略为使用该第一频域密度的基带估计信号估计该自干扰信道的响应。换句话 说， 在该第一参数小于第三预设门限的情况下， 保持自干扰信道的估计策略 不变。
进一步， 该确定该基带自干扰信道的第一参数， 包括： 确定第一残留干 扰的功率； 确定该第一残留干扰的功率为该第一参数。
进一步，在确定使用该第二频域密度的基带估计信号估计基带自干扰信 道的响应的情况下，该根据该估计策略，估计该基带自干扰信道的响应包括： 使用该第二频域密度的基带估计信号估计基带自干扰信道的响应以获取第 二估计响应； 开始进行第二全双工通信； 根据该第二估计响应， 删除第二基 带接收信号中的基带自干扰， 其中该第二基带接收信号是在该第二全双工通 信中接收到的基带信号； 确定第二残留干扰的功率； 根据该第二残留干扰的 功率， 确定是否增加该基带估计信号的频域密度。 具体地， 在该第二残留干 扰的功率小于第三预设门限的情况，确定保持该基带估计信号的频域密度不 变； 在该第二残留干扰的功率大于该第三预设门限的情况下， 根据该第二残 留干扰的功率与该第一残留干扰的功率， 确定第二参数。 该第二残留干扰的 功率是第二全双工通信中的该基带自干扰信道的残留干扰的功率。该第二残 留干扰的功率可以通过测量得到。
可选的， 作为一个实施例， 可以釆用以下公式确定该第二参数：
R2 = P「P2， 公式 1.3 其中， 1 2为该第二参数， 为该第一残留干扰的功率， P2为该第二残留 干扰的功率。该根据该第二参数，确定是否增加该基带估计信号的频域密度， 包括： 在该第二参数大于第四预设门限的情况下， 确定增加该基带估计信号 的频域密度； 在该第二参数小于该第四预设门限的情况下， 确定使用该第一 频域密度的基带估计信号估计基带自干扰信道的响应。
图 2是根据本发明实施例提供的估计基带自干扰信道响应的方法的示意 性流程图。 图 2所示的实施例是图 1所示的实施例的一个具体实施例。 图 2 所示的实施例是以 LTE系统为例。本领域技术人员可以理解，本发明所提供 的方法还可以应用于其他全双工通信系统。
201 , 通信节点指示服务范围内的用户设备在某个正交频分复用
( Orthogonal Frequency Division Multiplexing, OFDM )符号上不进行上行数 据发射。 该通信节点可以是家庭基站（ Femto Base Station )。
202, 该通信节点在该 OFDM符号上估计基带自干扰信道的响应以获取 该基带自干扰信道的第一估计响应。
具体地， 对于该 OFDM符号上的一个资源块， 该通信节点发射基带估 计信号 x。 在经过发射射频通道、 收发空间信道、 接收射频通道和模拟干扰 删除后， 该通信节点可以接收的对应于该基带估计信号 x的基带信号 y。 在 不考虑该通信节点的基带的接收模块和发送模块之间合成信道的非线性的 情况下， 该通信节点接收的基带信号 y的频域表示为 y = hx + n， 其中， h为 待估计的基带自干扰信道的响应， n为噪声。可以釆用最小均方差（Minimum Mean Square Error, MMSE )、 最小二乘（ Least Square, LS )等方法估计该 基带估计自干扰信道的响应。估计基带自干扰信道的响应的具体过程为本领 域技术人员的公知内容， 在此不必赘述。
203 , 该通信节点开始进行全双工通信， 使用估计的基带自干扰信道的 响应删除基带接收信号中的基带自干扰， 其中该基带接收信号是该通信节点 在该全双工通信中接收到的基带信号。
具体地， 该通信节点在进行全双工通信时， 接收到的基带接收信号中包 括对端通信节点发送的基带信号以及自干扰。该通信节点可以利用第一估计 响应对自干扰进行模拟。该通信节点可以使用模拟的基带自干扰删除基带接 收信号中的基带自干扰， 从而可以得到对端通信节点发送的基带信号。
204, 该通信节点可以确定第一参数， 其中该第一参数与基带自干扰删 除的残留干扰的功率相关。
可选的， 作为一个实施例， 该第一基带接收信号可以包括第一时间的基 带接收信号和第二时间的基带接收信号。该第一时间的第一基带接收信号是 指在该第一全双工通信的第一时间接收到的基带信号。该第二时间的第一基 带接收信号是指在该第一全双工通信的第二时间接收到的基带信号。该通信 节点确定第一时间发射的基带信号与第一时间的已处理信号，其中该第一时 间的已处理信号是删除了自干扰后的第一时间的基带接收信号； 确定第二时 间发射的基带信号与第二时间的已处理信号， 其中该第二时间的已处理信号 是删除了自干扰后的第二时间的基带接收信号； 根据该第一时间发射的基带 信号、 该第一时间的已处理信号、 该第二时间发射的基带信号以及该第二时 间的已处理信号， 确定该第一参数， 其中该第一参数与基带自干扰删除的残 留干扰的功率成正比。 可选的， 该第一时间为开始进行全双工通信的时间， 该第二时间为该全双工通信的信道质量的下降值小于第二预设门限的时间， 其中该信道质量可以包括以下中的任一个或多个： SINR、 CQI等。
具体地， 可以根据以下公式确定该第一参数： R1 =∑½ (n) y2(n) -∑x1 (n) yi(n)， 公式 1.4 n-1 n-1
其中， ！^为该第一参数， Xl (n)为该第一时间发射的基带信号， y;(n)为 该第一时间的基带接收信号， x2 (n)为该第二时间发射的基带信号， y2(n)为 该第二时间的基带接收信号。 x2 (n) y2(n)表示第二时间的相关系数， | i ( n ) y； ( n )表示第一时间的相关系数。 可选的， 作为另一个实施例， 除了使用公式 1.4确定该第一参数外， 该 通信节点还可以通过其他方式确定该第一参数， 只要保证确定的该第一参数 与基带自干扰删除的残留干扰的功率成正比即可。 例如， 该通信节点在计算 第一时间的相关系数和第二时间的相关系数时， 可以在多个数据符号上计 算， 然后取平均值。 具体方法如以下公式所示： χ2Υ2 - χιΥι
x2(ni)y2 (ni) + x2(n2)y2 (n2) +一 + χ2 ( )γ2 (nt
i
xi(ni)y; (ni) + x!(n 2)yi (n2) +〜+ x n^y; (n;) 其中， ！^为该第一参数， Xl(ni)为该第一时间发射的基带信号在第 iii个 数据符号上的值， y;(ni)为该第一时间的基带接收信号在第 个数据符号上的 值， x2 (ni)为该第二时间发射的基带信号在第 个数据符号上的值， y2(ni)为 该第二时间的基带接收信号在第 ni个数据符号上的值， i为正整数。
可选的， 作为另一个实施例， 该通信节点还可以直接测量该基带自干扰 信道的残留干扰的功率， 使用该残留干扰的功率作为该第一参数。
205 , 在该第一参数大于第一预设门限的情况下， 确定该基带自干扰信 道的估计策略为停止进行全双工通信并重新开始估计该基带自干扰信道的 口向应。
206, 根据该估计策略， 停止进行全双工通信并重新开始估计该基带自 干 4尤信道的响应。
具体地， 该第一预设门限是根据仿真试验确定的。 在第一参数大于该第 一预设门限的情况下， 残留干扰可能会对接收到的有用信号造成较大的干 扰。 因此， 该通信节点需要重新估计基带自干扰信道的响应， 使用新估计的 基带自干扰信道的响应减少接收信号中的自干扰。 根据图 2所示的方法， 通信节点在进行全双工通信时， 可以在适当的时 刻确定第一参数， 根据确定的第一参数， 确定是否需要重新估计基带自干扰 信道的响应， 以便保证估计的基带自干扰信道的响应的精度。 也就是说， 根 据图 2所示的方法，通信节点可以选择合适的时域资源发送基带估计信号以 便进行基带自干扰信道的响应的估计。 此外， 由于确定自干扰信道响应的时 机是根据第一参数确定的， 釆用图 2所示的方法的全双工系统具有高灵活性 的特点。 同时， 全双工系统所处的环境变化可以影响基带自干扰删除的残留 干扰。 第一参数是与基带自干扰删除的残留干扰相关的。 因此， 通过监测第 一数的方式确定估计基带自干扰信道的响应的时机的方式可以有效地适应 系统所处环境的变化。 由家庭基站和该家庭基站所服务的终端所组成的无线 全双工系统所处的环境可能会经常发生变化。 例如， 该系统周围散射环境和 多径特征都是可变的。 因此， 图 2所示的方法可以适用于由家庭基站和对应 的终端所组成的无线全双工系统。
图 3是根据本发明实施例提供的估计基带自干扰信道响应的方法的示意 性流程图。 图 3所示的实施例是图 1所示的实施例的一个具体实施例。 图 3 所示的实施例是以 LTE系统为例。本领域技术人员可以理解，本发明所提供 的方法还可以应用于其他全双工通信系统。
301 , 通信节点使用第一频域密度的基带估计信号估计该基带自干扰信 道的响应以获取该基带自干扰信道的第一估计响应。 第一频域密度是指相邻 自干扰导频信号间隔 N1个子载波， 其 中 N1为正整数。
具体地， 对于该 OFDM符号上的一个资源块， 该通信节点发射基带估 计信号 x。 在经过发射射频通道、 收发空间信道、 接收射频通道和模拟干扰 删除后， 该通信节点可以接收的对应于该基带估计信号 X的基带信号 y。 在 不考虑该通信节点的基带的接收模块和发送模块之间合成信道的非线性的 情况下， 该通信节点接收的基带信号 y的频域表示为 y = hx + n， 其中， h为 待估计的基带自干扰信道的响应， n为噪声。可以釆用最小均方差（Minimum Mean Square Error, MMSE )、 最小二乘（ Least Square, LS )等方法估计该 基带估计自干扰信道的响应。估计基带自干扰信道的响应的具体过程为本领 域技术人员的公知内容， 在此不必赘述。
302, 该通信节点开始进行第一全双工通信， 根据该第一估计响应删除 第一基带接收信号中的基带自干扰， 其中该第一基带接收信号是该通信节点 在该第一全双工通信中接收到的基带信号。
具体地， 该通信节点在进行全双工通信时， 接收到的基带接收信号中包 括对端通信节点发送的基带信号以及自干扰。该通信节点可以利用该第一估 计响应对自干扰进行模拟。该通信节点可以使用模拟的基带自干扰删除基带 接收信号中的基带自干扰， 从而可以得到对端通信节点发送的基带信号。
303， 该通信节点确定第一残留干扰的功率， 并且确定该第一残留干扰 的功率为第一参数。该第一残留干扰的功率是第一全双工通信中的该基带自 干扰信道的残留干扰的功率。 该第一残留干扰的功率可以通过测量得到。
304， 该通信节点根据该第一参数， 确定该基带自干扰信道的估计策略。 具体地， 在该第一参数大于第三预设门限的情况下， 该通信节点确定该 基带自干扰信道的估计策略为使用第二频域密度的基带估计信号估计该基 带自干扰信道的响应， 其中该第二频域密度大于第一频域密度。 第二频域密 度是指相邻导频信号间隔 N2个子载波， 其中 N2为小于 N1的正整数。在该 第一参数小于第三预设门限的情况下， 该通信节点确定该基带自干扰信道的 估计策略为使用该第一频域密度的基带估计信号估计该基带自干扰信道的 口向应。
该通信节点可以预设多个备选频域密度。在该第一参数大于该第三预设 门限的情况下， 该通信节点可以从预设的多个备选频域密度中选择大于该第 一频域密度且小于其他频域密度的一个频域密度作为该第二频域密度。
该通信节点还可以直接确定该第二频域密度。 例如， 在该第一自干扰信 道参数大于该第三预设门限的情况下， 该通信节点可以直接减少基带估计信 号间的子载波。
进一步，在确定该基带自干扰信道的估计策略为使用第二频域密度的基 带估计信号估计该基带自干扰信道的响应的情况下， 该通信节点可以根据该 估计策略， 估计该基带自干扰信道的响应。 具体地， 该通信节点可以执行步 骤 305至步骤 308以便估计该基带自干扰信道的响应并继续对该基带估计信 号的频域密度进行调整。
305， 该通信节点使用该第二频域密度的基带估计信号估计基带自干扰 信道的响应以获取第二估计响应。
步骤 305的具体过程与步骤 301类似， 在此就不必赘述。
306， 该通信节点开始进行第二全双工通信， 根据该第二估计响应删除 第二基带接收信号中的基带自干扰， 其中该第二基带接收信号是该通信节点 在该第二全双工通信中接收到的基带信号。
步骤 306的具体过程与步骤 302类似， 在此就不必赘述。
307， 该通信节点确定第二残留干扰的功率。 该第二残留干扰的功率是 第二全双工通信中的该基带自干扰信道的残留干扰的功率。该第二残留干扰 的功率可以通过测量得到。
确定第二残留干扰的功率的时间与确定第一残留干扰的功率的时间之 间的间隔 T可以是固定的，也可以根据基带自干扰信道的响应或残留干扰的 功率的变化快慢动态的确定。
308 , 该通信节点根据该第二残留干扰的功率， 确定是否保持该基带估 计信号的频域密度不变。
具体地， 在该第二残留干扰的功率小于该第三预设门限的情况下， 该通 信节点可以确定保持该基带估计信号的频域密度不变， 即继续使用第二频域 密度的导频信号估计该基带自干扰信道的响应。在该第二残留干扰的功率大 于第三预设门限的情况下，该通信节点可以根据该第二残留干扰的功率与该 第一残留干扰的功率，确定第二参数并根据该第二自干扰信道参数确定是否 增加该基带估计信号的频域密度。 具体地， 该通信节点可以使用以下公式确 定该第二参数：
R2 = p「p2， 公式 1.6 其中， 1 2为该第二参数， 为该第一残留干扰的功率， P2为该第二残留 干扰的功率。 该根据第二参数， 确定是否增加该基带估计信号的频域密度包 括： 在该第二参数大于第四预设门限的情况下， 确定增加该基带估计信号的 频域密度； 在该第二参数小于该第四预设门限的情况下， 确定使用第一频域 密度的基带估计信号估计该基带自干扰信道的响应。该通信节点在增加该基 带估计信号的频域密度时， 可以直接从备选的频域密度中选择一个频域密 度， 其中所选择的频域密度大于该第二频域密度且小于其他频域密度。 该通 信节点还可以直接增加该基带估计信号的频域密度。 也就是说， 该通信节点 可以之间减少基带估计信号间的子载波。
进一步，在执行步骤 308且确定增加基带估计信号的频域密度的情况下， 该通信节点还可以进一步增加该基带估计信号的频域密度。 此时， 步骤 308 确定的基带估计信号的频域密度相当于步骤 304中的第二频域密度。进一步 增加该基带估计信号的频域密度的过程与步骤 305至步骤 308类似。
需要注意的是， 该基带估计信号的频域密度不能大于最大频域密度。 最 大频域密度是指相邻基带估计信号间隔 Nmin个子载波，其中 Nmin满足以下条 件： 在相邻的基带估计信号间隔 Nmin个子载波的情况下， 残留干扰的功率大 于该第三预设门限； 在相邻的基带估计信号间隔为 （Nmin-1 )个子载波的情 况下， 残留干 ·ί尤的功率小于第三预设门限。
根据图 3所示的方法， 通信节点在进行全双工通信时， 可以逐步提高基 带估计信号的频域密度， 以便保证估计的基带自干扰信道的响应的精度。 也 就是说， 根据图 3所示的方法， 通信节点可以选择合适的频域资源发送基带 估计信号以便进行基带自干扰信道的响应的估计。 此外， 由于是否调整基带 估计信号的频域密度是根据残留干扰的功率确定的， 釆用图 3所示的方法的 全双工系统具有高灵活性的特点。 同时， 全双工系统所处的环境变化可以影 响自干扰删除的残留干扰。 第一参数为残留干扰的功率， 第二参数与残留干 扰的功率相关。 因此， 通过监测残留干扰的功率的方式确定是否调整基带估 计信号的频域密度可以有效地适应系统所处环境的变化。 由家庭基站和该家 庭基站所服务的终端所组成的无线全双工系统所处的环境可能会经常发生 变化。 例如， 该系统周围散射环境和多径特征都是可变的。 因此， 图 3所示 的方法可以用于由家庭基站和对应的终端所组成的无线全双工系统。
图 4是根据本发明实施例提供的装置的结构框图。 图 4所示的装置 400 可以位于通信节点上， 该通信节点可以是固定终端或移动终端， 该通信节点 也可以是基站、 ΑΡ等网络节点。 如图 4所示， 装置 400包括控制单元 401 和通信单元 402。
控制单元 401， 用于估计基带自干扰信道的响应以获取该基带自干扰信 道的第一估计响应。
通信单元 402， 用于进行第一全双工通信。
通信单元 402， 具体用于发射基带信号并接收基带信号。 具体来说， 收 发单元 402接收其他通信节点发送的射频信号，将接收到的射频信号转换为 基带信号。
控制单元 401， 还用于根据该第一估计响应， 删除第一基带接收信号中 的基带自干扰， 其中该第一基带接收信号是通信单元 402在该第一全双工通 信中接收到的基带信号。 控制单元 401， 还用于确定该基带自干扰信道的第一参数， 其中该第一 参数与该基带自干扰信道的残留干扰相关。
控制单元 401， 还用于根据该第一参数， 确定该基带自干扰信道的估计 策略。
控制单元 401，还用于根据该估计策略，估计该基带自干扰信道的响应。 图 4所示的装置 400能够根据基带自干扰信道的第一参数，确定相应的 基带自干扰信道估计策略， 并根据确定的基带自干扰信道的估计策略估计基 带自干扰信道的响应。 这样， 装置 400可以有效地提高估计的基带自干扰信 道的响应的精度。
可选的， 作为一个实施例， 控制单元 401， 可以用于使用基带估计信号 估计攻击点自干扰信道的响应以获取该基带自干扰的第一估计响应。 具体 地， 通信单元 402， 用于发射基带估计信号 X并接收对应于该基带估计信号 X的基带信号 y。控制单元 401，具体用于根据该基带估计信号 X和该基带信 号 y估计出基带自干扰的响应。控制单元 401可以根据删除了基带自干扰的 第一基带接收信号， 确定该第一参数。 具体地， 控制单元 401， 具体用于确 定第一时间发射的基带信号与第一时间的已处理信号，其中该第一时间的已 处理信号是删除了该基带自干扰后的第一时间的第一基带接收信号，确定第 二时间发射的基带信号与第二时间的已处理信号， 其中该第二时间的已处理 信号是删除了该基带自干扰后的第二时间的第一基带接收信号，根据该第一 时间发射的基带信号、 该第一时间的已处理信号、 该第二时间的基带信号以 及该第二时间的已处理信号确定该第一参数， 其中该第一参数与该基带自干 扰信道的残留干扰的功率成正比。
进一步， 控制单元 401， 具体用于根据以下公式确定该第一参数，
Ri =∑x 2 (n) y2(n) -∑xi (n) yi(n)， 公式 I ·7 -l -1
其中， ！^为该第一参数， Xl (n)为该第一时间发射的基带信号， y; (n)为 该第一时间的基带接收信号， x2 (n)为该第二时间发射的基带信号， y2(n)为 该第二时间的基带接收信号。 | 2 (n) y2(n)表示第二时间的相关系数， i ( n ) y； ( n )表示第一时间的相关系数。 除了使用公式 1.7确定该第一参数外， 控制单元 401， 还可以通过其他 方式确定该第一参数， 只要保证确定的该第一参数与基带自干扰删除的残留 干扰的功率成正比即可。 例如， 控制单元 401在计算第一时间的相关系数和 第二时间的相关系数时， 可以在多个数据符号上计算， 然后取平均值。 具体 方法: ^以下公式所示： χ2Υ2 - χιΥι
_ ^2 (ni )y2 (ηι ) + x 2(n 2)y2 (n2) +— + Χ 2 (n; 公式 1.8 xi(ni)y; (ni ) + xi (n 2)yi' (n2) +〜+ x n^y; (n; 其中， ！^为该第一参数， Xl(ni)为该第一时间发射的基带信号在第 个 数据符号上的值， y;(ni)为该第一时间的基带接收信号在第 个数据符号上的 值， χ2 (ιΟ为该第二时间发射的基带信号在第 个数据符号上的值， y2(ni)为 该第二时间的基带接收信号在第 ni个数据符号上的值， i为正整数。
控制单元 401还可以直接测量该基带自干扰信道的残留干扰的功率，使 用该残留干扰的功率作为该第一参数。
进一步， 该第一时间可以是开始进行该第一全双工通信的时间， 该第二 时间可以是该第一全双工通信的信道质量的下降值小于第二预设门限的时 间， 其中该信道质量可以包括以下中的任一个或多个： SINR、 CQI等。
可选的， 作为另一个实施例， 控制单元 401， 具体用于使用第一频域密 度的基带估计信号估计该基带自干扰信道的响应。 具体地， 通信单元 402， 用于发射第一频域密度的基带估计信号 X并接收对应于该基带估计信号 X的 基带信号 。控制单元 401，具体用于根据该第一频域密度的基带估计信号 X 和该基带信号 y估计出基带自干扰的响应。 控制单元 401， 具体用于确定第 一残留干扰的功率， 确定该第一残留干扰的功率为该第一参数。 该第一残留 干扰的功率是第一全双工通信中的该基带自干扰信道的残留干扰的功率。该 第一残留干扰的功率可以是控制单元 401通过测量确定的。 控制单元 401， 具体用于在该第一参数大于第三预设门限的情况下，确定该基带自干扰信道 的估计策略为使用第二频域密度的基带估计信号估计该基带自干扰信道的 响应， 其中该第二频域密度大于该第一频域密度， 在该第一参数小于该第三 预设门限的情况下，确定该基带自干扰信道的估计策略为使用该第一频域密 度的基带估计信号估计该基带自干扰信道的响应。
进一步， 控制单元 401， 还用于使用该第二频域密度的基带估计信号估 计该基带自干扰信道的响应以获取第二估计响应。 具体地， 通信单元 402， 用于发射第二频域密度的基带估计信号 x2并接收对应于该第二频域密度的 基带估计信号 x2的基带信号 y2。 控制单元 401， 具体用于根据该基带信号 x2和该基带信号 y2估计出基带自干扰的响应。 通信单元 402， 还用于进行 第二全双工通信。 控制单元 401， 还用于根据该第二估计响应， 删除第二基 带接收信号中的基带自干扰， 其中该第二基带接收信号是在该第二全双工通 信中接收到的基带信号。 控制单元 401， 还用于确定第二残留干扰的功率。 该第二残留干扰的功率是第二全双工通信中的该基带自干扰信道的残留干 扰的功率。 该第二残留干扰的功率可以是控制单元 401通过测量确定的。 控 制单元 401，还用于在该第二残留干扰的功率小于该第三预设门限的情况下， 确定保持该基带估计信号的频域密度不变。 控制单元 401， 还用于在该第二 残留干扰的功率大于该第三预设门限的情况下，根据该第二残留干扰的功率 与该第一残留干扰的功率确定第二参数， 根据该第二参数， 确定是否增加该 基带估计信号的频域密度。
控制单元 401可以釆用以下公式确定该第二参数：
R2 = P「P2， 公式 1.9 其中， 1 2为该第二参数， 为该第一残留干扰的功率， P2为该第二残留 干扰的功率。
控制单元 401， 具体用于在该第二参数大于第四预设门限的情况下， 确 定增加该基带估计信号的频域密度； 在该第二参数小于该第四预设门限的情 况下， 确定使用第一频域密度的基带估计信号估计该基带自干扰信道的响 应。 控制单元 401在增加该基带估计信号的频域密度时， 可以直接从备选的 频域密度中选择一个频域密度， 其中所选择的频域密度大于该第二频域密度 且小于其他频域密度。控制单元 401还可以直接增加该基带估计信号的频域 密度。 也就是说， 控制单元 401可以之间减少基带估计信号间的子载波。
图 5是根据本发明实施例提供的装置的结构框图。 图 5所示的装置 500 可以位于通信节点上， 该通信节点可以是固定终端或移动终端， 该通信节点 也可以是基站、 AP等网络节点。 如图 5所示， 装置 500包括处理器 501和 收发器 502。
处理器 501， 用于估计基带自干扰信道的响应以获取该基带自干扰信道 的第一估计响应。
收发器 502， 用于进行第一全双工通信。 收发器 502可以用于发射基带信号并接收基带信号。 具体来说， 收发器 502接收其他通信节点发送的射频信号， 将接收到的射频信号转换为基带信 号。
处理器 501， 还用于根据该第一估计响应， 删除第一基带接收信号中的 基带自干扰， 其中该第一基带接收信号是收发器 502在该第一全双工通信中 接收到的基带信号。
处理器 501， 还用于确定该基带自干扰信道的第一参数， 其中该第一参 数与该基带自干扰信道的残留干扰相关。
处理器 501， 还用于根据该第一参数， 确定该基带自干扰信道的估计策 略。
处理器 501， 还用于根据该估计策略， 估计该基带自干扰信道的响应。 图 5所示的装置 500能够根据基带自干扰信道的第一参数，确定相应的 基带自干扰信道估计策略， 并根据确定的基带自干扰信道的估计策略估计基 带自干扰信道的响应。 这样， 装置 500可以有效地提高估计的基带自干扰信 道的响应的精度。
可选的， 作为一个实施例， 处理器 501， 可以用于使用基带估计信号估 计该基带自干扰信道的响应以获取该基带自干扰信道的第一估计响应。具体 地， 收发器 502， 用于发射基带估计信号 X并接收对应于该基带估计信号 X 的基带信号 y。 处理器 501， 具体用于根据该基带信号 X和该基带信号 y估 计出基带自干扰的响应。处理器 501可以根据删除了基带自干扰的第一基带 接收信号， 确定该第一参数。 具体地， 处理器 501， 具体用于确定第一时间 发射的基带信号与第一时间的已处理信号， 其中该第一时间的已处理信号是 删除了该基带自干扰后的第一时间的第一基带接收信号，确定第二时间发射 的基带信号与第二时间的已处理信号， 其中该第二时间的已处理信号是删除 了该基带自干扰后的第二时间的第一基带接收信号，根据该第一时间发射的 基带信号、 该第一时间的已处理信号、 该第二时间的基带信号以及该第二时 间的已处理信号确定该第一参数，其中该第一参数与该基带自干扰信道的残 留干扰的功率成正比。
进一步， 处理器 501， 具体用于根据以下公式确定该第一参数，
R1 =∑x2 (n) y2(n) -∑x1 (n) yi(n) , 公式 1.10 其中， ！^为该第一参数， Xl (n)为该第一时间发射的基带信号， y;(n)为 该第一时间的基带接收信号， x2 (n)为该第二时间发射的基带信号， y2(n)为 该第二时间的基带接收信号。 | 2 (n) y2(n)表示第二时间的相关系数， | i ( n ) y； ( n )表示第一时间的相关系数。 除了使用公式 1.10确定该第一参数外， 处理器 501， 还可以通过其他方 式确定该第一参数， 只要保证确定的该第一参数与基带自干扰删除的残留干 扰的功率成正比即可。 例如， 处理器 501在计算第一时间的相关系数和第二 时间的相关系数时， 可以在多个数据符号上计算， 然后取平均值。 具体方法 如以
公式 1 11
Figure imgf000022_0001
其中， ！^为该第一参数， Xl(ni)为该第一时间发射的基带信号在第 iii个 数据符号上的值， y;(ni)为该第一时间的基带接收信号在第 iii个数据符号上的 值， x2 (ni)为该第二时间发射的基带信号在第 个数据符号上的值， y2(ni)为 该第二时间的基带接收信号在第 ni个数据符号上的值， i为正整数。
处理器 501还可以直接测量该基带自干扰信道的残留干扰的功率，使用 该残留干扰的功率作为该第一参数。
进一步， 该第一时间可以是开始进行该第一全双工通信的时间， 该第二 时间可以是该第一全双工通信的信道质量的下降值小于第二预设门限的时 间， 其中该信道质量可以包括以下中的任一个或多个： SINR、 CQI等。
可选的， 作为另一个实施例， 处理器 501， 具体用于使用第一频域密度 的基带估计信号估计该基带自干扰信道的响应。 具体地， 收发器 502， 用于 发射第一频域密度的基带估计信号 X并接收对应于该第一频域密度的基带估 计信号 X的基带信号 y。 处理器 501， 具体用于根据该基带信号 X和该基带 信号 y估计出基带自干扰的响应。 处理器 501， 具体用于根据该基带信号 X 和该基带信号 y估计出基带自干扰的响应。 处理器 501， 具体用于确定第一 残留干扰的功率， 确定该第一残留干扰的功率为该第一参数。 该第一残留干 扰的功率是第一全双工通信中的该基带自干扰信道的残留干扰的功率。该第 一残留干扰的功率可以是处理器 501通过测量确定的。 处理器 501， 具体用 于在该第一参数大于第三预设门限的情况下，确定该基带自干扰信道的估计 策略为使用第二频域密度的基带估计信号估计该基带自干扰信道的响应， 其 中该第二频域密度大于该第一频域密度，在该第一参数小于该第三预设门限 的情况下，确定该基带自干扰信道的估计策略为使用该第一频域密度的基带 估计信号估计该基带自干扰信道的响应。
进一步， 处理器 501， 还用于使用该第二频域密度的基带估计信号估计 该基带自干扰信道的响应以获取第二估计响应。 具体地， 收发器 502， 用于 发射第二频域密度的基带估计信号 x2并接收对应于该第二频域密度的基带 估计信号 x2的基带信号 y2。 处理器 501， 具体用于根据该基带信号 x2和该 基带信号 y2估计出基带自干扰的响应。收发器 502，还用于进行第二全双工 通信。 处理器 501， 还用于根据该第二估计响应， 删除第二基带接收信号中 的基带自干扰， 其中该第二基带接收信号是在该第二全双工通信中接收到的 基带信号。 处理器 501， 还用于确定第二残留干扰的功率。 该第二残留干扰 的功率是第二全双工通信中的该基带自干扰信道的残留干扰的功率。该第二 残留干扰的功率可以是处理器 501通过测量确定的。 处理器 501， 还用于在 该第二残留干扰的功率小于该第三预设门限的情况下，确定保持该基带估计 信号的频域密度不变。 处理器 501， 还用于在该第二残留干扰的功率大于该 第三预设门限的情况下，根据该第二残留干扰的功率与该第一残留干扰的功 率确定第二参数， 根据该第二参数， 确定是否增加该基带估计信号的频域密 度。
处理器 501可以釆用以下公式确定该第二参数：
R2 = P「P2， 公式 1.12 其中， 1 2为该第二参数， 为该第一残留干扰的功率， P2为该第二残留 干扰的功率。
处理器 501， 具体用于在该第二参数大于第四预设门限的情况下， 确定 增加该基带估计信号的频域密度； 在该第二参数小于该第四预设门限的情况 下， 确定使用第一频域密度的基带估计信号估计该基带自干扰信道的响应。 处理器 501在增加该基带估计信号的频域密度时， 可以直接从备选的频域密 度中选择一个频域密度， 其中所选择的频域密度大于该第二频域密度且小于 其他频域密度。 处理器 501还可以直接增加该基带估计信号的频域密度。 也 就是说， 处理器 501可以之间减少基带估计信号间的子载波。
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、 或者计算机软件和电子硬件的结 合来实现。 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。 另一点， 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， 装置或单元的间接耦合 或通信连接， 可以是电性， 机械或其它的形式。 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， 也可以两个或两个以上单元集成在一 个单元中。
所述功能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）或处理器（processor )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 ), 随机存取存储器 （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 想到的变化或替换， 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

权利要求
1、 一种估计基带自干扰信道的响应的方法， 其特征在于， 所述方法包 括：
估计基带自干扰信道的响应以获取所述基带自干扰信道的第一估计响 应；
开始进行第一全双工通信；
根据所述第一估计响应， 删除第一基带接收信号中的基带自干扰， 其中 所述第一基带接收信号是在所述第一全双工通信中接收到的基带信号；
确定所述基带自干扰信道的第一参数， 其中所述第一参数与所述基带自 干扰信道的残留干扰相关；
根据所述第一参数， 确定所述基带自干扰信道的估计策略；
根据所述估计策略， 估计所述基带自干扰信道的响应。
2、 如权利要求 1所述的方法， 其特征在于， 所述第一基带接收信号包 括第一时间的第一基带接收信号和第二时间的第一基带接收信号；
所述确定所述基带自干扰信道的第一参数， 包括：
确定第一时间发射的基带信号与第一时间的已处理信号， 其中所述第一 时间的已处理信号是删除了所述基带自干扰后的所述第一时间的第一基带 接收信号；
确定第二时间发射的基带信号与第二时间的已处理信号， 其中所述第二 时间的已处理信号是删除了所述基带自干扰后的所述第二时间的第一基带 接收信号；
根据所述第一时间发射的基带信号、 所述第一时间的已处理信号、 所述 第二时间发射的基带信号以及所述第二时间的已处理信号确定所述第一参 数， 其中所述第一参数与所述基带自干扰信道的残留干扰的功率成正比。
3、 如权利要求 2所述的方法， 其特征在于， 所述根据所述第一时间发 射的基带信号、 所述第一时间的已处理信号、 所述第二时间发射的基带信号 以及所述第二时间的已处理信号确定所述第一参数， 包括： 根据以下公式确 定所述第一参数：
(n) y (n) yi(n)， 其中， 为所述第一参数， Xl (n)为所述第一时间发射的基带信号， y;(n) 为所述第一时间的基带接收信号， x2 (n)为所述第二时间发射的基带信号， y2(n)为所述第二时间的基带接收信号。
4、 如权利要求 2或 3所述的方法， 其特征在于， 所述根据所述第一参 数， 确定所述基带自干扰信道的估计策略， 包括：
在所述第一参数大于第一预设门限的情况下，确定停止进行所述第一全 双工通信并重新开始估计所述基带自干 4尤信道的响应。
5、 如权利要求 2-4 中任一项所述的方法， 其特征在于， 所述第一时间 为开始进行所述第一全双工通信的时间， 所述第二时间为所述第一全双工通 信的信道质量的下降值小于第二预设门限的时间。
6、 如权利要求 1所述的方法， 其特征在于， 所述估计基带自干扰信道 的响应以获取所述基带自干扰信道的第一估计响应， 包括：
使用第一频域密度的基带估计信号估计所述基带自干扰信道的响应； 所述根据所述第一参数， 确定所述基带自干扰信道的估计策略， 包括： 在所述第一参数大于第三预设门限的情况下，确定所述基带自干扰信道 的估计策略为使用第二频域密度的基带估计信号估计所述基带自干扰信道 的响应， 其中所述第二频域密度大于所述第一频域密度；
在所述第一参数小于所述第三预设门限的情况下，确定所述基带自干扰 信道的估计策略为使用所述第一频域密度的基带估计信号估计所述基带自 干 4尤信道的响应。
7、 如权利要求 6所述的方法， 其特征在于， 所述确定所述基带自干扰 信道的第一参数， 包括：
确定第一残留干扰的功率；
确定所述第一残留干扰的功率为所述第一参数。
8、 如权利要求 6或 7所述的方法， 其特征在于， 在所述确定所述基带 自干扰信道的估计策略为使用第二频域密度的基带估计信号估计所述基带 自干扰信道的响应的情况下， 所述根据所述估计策略， 估计所述基带自干扰 信道的响应包括：
使用所述第二频域密度的基带估计信号估计所述基带自干扰信道的响 应以获取第二估计响应；
开始进行第二全双工通信；
根据所述第二估计响应， 删除第二基带接收信号中的基带自干扰， 其中 所述第二基带接收信号是在所述第二全双工通信中接收到的基带信号； 确定第二残留干扰的功率；
在所述第二残留干扰的功率小于所述第三预设门限的情况下，确定保持 所述基带估计信号的频域密度不变；
在所述第二残留干扰的功率大于所述第三预设门限的情况下，根据所述 第二残留干扰的功率与所述第一残留干扰的功率， 确定第二参数， 根据所述 第二参数， 确定是否增加所述基带估计信号的频域密度。
9、 如权利要求 8所述的方法， 其特征在于， 所述根据所述第二残留干 扰的功率与所述第一残留干扰的功率， 确定第二参数， 包括： 釆用以下公式 确定所述第二自干扰信道参数：
R2 = P「P2，
其中， R2为所述第二参数， ^为所述第一残留干扰的功率， 为所述第 二残留干扰的功率。
10、 如权利要求 9所述的方法， 其特征在于， 所述根据所述第二参数， 确定是否增加所述基带估计信号的频域密度， 包括：
在所述第二参数大于第四预设门限的情况下，确定增加所述基带估计信 号的频域密度；
在所述第二参数小于所述第四预设门限的情况下，确定保持所述基带估 计信号的频域密度不变。
11、 一种装置， 其特征在于， 所述装置包括：
控制单元，用于估计基带自干扰信道的响应以获取所述基带自干扰信道 的第一估计响应；
通信单元， 用于进行第一全双工通信；
所述控制单元， 还用于根据所述第一估计响应， 删除第一基带接收信号 中的基带自干扰，其中所述第一基带接收信号是所述通信单元在所述第一全 双工通信中接收到的基带信号；
所述控制单元， 还用于确定所述基带自干扰信道的第一参数， 其中所述 第一参数与所述基带自干扰信道的残留干扰的功率相关；
所述控制单元， 还用于根据所述第一参数， 确定所述基带自干扰信道的 估计策略；
所述控制单元， 还用于根据所述估计策略， 估计所述基带自干扰信道的 口向应。
12、 如权利要求 11所述的装置， 其特征在于，
所述控制单元， 具体用于确定第一时间发射的基带信号与第一时间的已 处理信号， 其中所述第一时间的已处理信号是删除了所述基带自干扰后的所 述第一时间的第一基带接收信号，确定第二时间发射的基带信号与第二时间 的已处理信号， 其中所述第二时间的已处理信号是删除了所述基带自干扰后 的所述第二时间的第一基带接收信号， 根据所述第一时间发射的基带信号、 所述第一时间的已处理信号、所述第二时间发射的基带信号以及所述第二时 间的已处理信号确定所述第一参数， 其中所述第一参数与所述基带自干扰信 道的残留干 ·ί尤的功率成正比。
13、 如权利要求 12所述的装置， 其特征在于， 所述控制单元， 具体用 于根据以下公式确定所述第一参数：
Ri
Figure imgf000029_0001
其中， 为所述第一参数， Xl (n)为所述第一时间发射的基带信号， y;(n) 为所述第一时间的基带接收信号， χ2 (η)为所述第二时间发射的基带信号， y2(n)为所述第二时间的基带接收信号。
14、 如权利要求 12或 13所述的装置， 其特征在于， 所述控制单元， 具 体用于在所述第一参数大于第一预设门限的情况下，确定停止进行所述第一 全双工通信并重新开始估计所述基带自干 4尤信道的响应。
15、 如权利要求 11所述的装置， 其特征在于，
所述控制单元， 具体用于使用第一频域密度的基带估计信号估计所述基 带自干扰信道的响应；
所述控制单元， 具体用于在所述第一参数大于第三预设门限的情况下， 确定所述基带自干扰信道的估计策略为使用第二频域密度的基带估计信号 估计所述基带自干扰信道的响应，其中所述第二频域密度大于所述第一频域 密度， 在所述第一参数小于所述第三预设门限的情况下， 确定所述基带自干 扰信道的估计策略为使用所述第一频域密度的基带估计信号估计所述基带 自干 4尤信道的响应。
16、 如权利要求 15所述的装置， 其特征在于， 所述控制单元， 具体用 于确定第一残留干扰的功率， 确定所述第一残留干扰的功率为所述第一参 数。
17、 如权利要求 15或 16所述的装置， 其特征在于，
所述控制单元，还用于使用所述第二频域密度的基带估计信号估计所述 基带自干扰信道的响应以获取第二估计响应；
所述通信单元， 还用于开始第二全双工通信；
所述控制单元， 还用于根据所述第二估计响应， 删除第二基带接收信号 中的基带自干扰，其中所述第二基带接收信号是在所述第二全双工通信中接 收到的基带信号；
所述控制单元， 还用于确定第二残留干扰的功率；
所述控制单元，还用于在所述第二残留干扰的功率小于所述第三预设门 限的情况下， 确定保持所述基带估计信号的频域密度不变；
所述控制单元，还用于在所述第二残留干扰的功率大于所述第三预设门 限的情况下， 根据所述第二残留干扰的功率与所述第一残留干扰的功率， 确 定第二参数， 根据所述第二参数， 确定是否增加所述基带估计信号的频域密 度。
18、 如权利要求 17所述的装置， 其特征在于， 所述控制单元， 具体用 于釆用以下公式确定所述第二参数：
R2 = P「P2，
其中， R2为所述第二参数， ^为所述第一残留干扰的功率， 为所述第 二残留干扰的功率。
19、 如权利要求 18所述的装置， 其特征在于， 所述控制单元， 具体用 于在所述第二参数大于第四预设门限的情况下，确定增加所述基带估计信号 的频域密度， 在所述第二参数小于所述第四预设门限的情况下， 确定使用所 述第一频域密度的基带估计信号估计所述基带自干扰信道的响应。
20、 如权利要求 11-19中任一项所述的装置， 其特征在于， 所述装置应 用于终端或网络节点， 所述终端包括移动终端和固定终端， 所述网络节点包 括基站和接入点。
PCT/CN2014/076232 2014-04-25 2014-04-25 估计基带自干扰信道响应的方法和装置 WO2015161508A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201480077683.9A CN106464420B (zh) 2014-04-25 2014-04-25 估计基带自干扰信道响应的方法和装置
PCT/CN2014/076232 WO2015161508A1 (zh) 2014-04-25 2014-04-25 估计基带自干扰信道响应的方法和装置
US15/332,483 US10044531B2 (en) 2014-04-25 2016-10-24 Method for estimating response of baseband self-interference channel and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/076232 WO2015161508A1 (zh) 2014-04-25 2014-04-25 估计基带自干扰信道响应的方法和装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/332,483 Continuation US10044531B2 (en) 2014-04-25 2016-10-24 Method for estimating response of baseband self-interference channel and apparatus

Publications (1)

Publication Number Publication Date
WO2015161508A1 true WO2015161508A1 (zh) 2015-10-29

Family

ID=54331643

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/076232 WO2015161508A1 (zh) 2014-04-25 2014-04-25 估计基带自干扰信道响应的方法和装置

Country Status (3)

Country Link
US (1) US10044531B2 (zh)
CN (1) CN106464420B (zh)
WO (1) WO2015161508A1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105556860B (zh) 2013-08-09 2018-04-03 库姆网络公司 用于非线性数字自干扰消除的系统以及方法
US9742593B2 (en) 2015-12-16 2017-08-22 Kumu Networks, Inc. Systems and methods for adaptively-tuned digital self-interference cancellation
WO2018183384A1 (en) 2017-03-27 2018-10-04 Kumu Networks, Inc. Systems and methods for intelligently-tunded digital self-interference cancellation
JP7096346B2 (ja) 2018-02-27 2022-07-05 クム ネットワークス，インコーポレイテッド 設定可能なハイブリッド自己干渉キャンセルシステムおよび方法
US10868661B2 (en) 2019-03-14 2020-12-15 Kumu Networks, Inc. Systems and methods for efficiently-transformed digital self-interference cancellation
US20210307006A1 (en) * 2020-03-26 2021-09-30 Qualcomm Incorporated Dynamically managing system resources upon cancelation of a symbol allocation in slot format indicators
US20230247532A1 (en) * 2022-01-28 2023-08-03 Qualcomm Incorporated Techniques for multiplexing restriction relaxation for full duplex communication
CN118282812A (zh) * 2022-12-30 2024-07-02 北京三星通信技术研究有限公司 由无线通信网络中的节点执行的方法以及节点

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102412931A (zh) * 2011-11-17 2012-04-11 信源通科技（西安）有限公司 多天线比特交织编码系统的串行干扰抵消检测方法及系统
WO2012102665A1 (en) * 2011-01-25 2012-08-02 Telefonaktiebolaget L M Ericsson (Publ) Interference cancellation based on interfering link il signal quality and related methods and devices
CN103595520A (zh) * 2012-08-16 2014-02-19 华为技术有限公司 通讯装置及其空分双工方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0510385D0 (en) * 2005-05-20 2005-06-29 British Broadcasting Corp Improvements relating to on-channel repeaters
KR100879334B1 (ko) * 2007-03-06 2009-01-19 (주)에어포인트 초소형 일체형 간섭 제거 무선중계 장치 및 그 방법
US8457254B2 (en) * 2009-08-27 2013-06-04 Telefonaktiebolaget L M Ericsson (Publ) Equalization and residual self-interference suppression using serial localization with indecision
US9887728B2 (en) * 2011-02-03 2018-02-06 The Board Of Trustees Of The Leland Stanford Junior University Single channel full duplex wireless communications
CN102347778B (zh) * 2011-08-05 2014-01-22 中国舰船研究设计中心 一种自适应干扰对消装置及其调试方法
US9008208B2 (en) * 2012-05-13 2015-04-14 Amir Keyvan Khandani Wireless transmission with channel state perturbation
US8842584B2 (en) * 2012-07-13 2014-09-23 At&T Intellectual Property I, L.P. System and method for full duplex cancellation
CN103716266B (zh) * 2012-09-29 2017-09-12 华为技术有限公司 信号处理方法、装置及系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012102665A1 (en) * 2011-01-25 2012-08-02 Telefonaktiebolaget L M Ericsson (Publ) Interference cancellation based on interfering link il signal quality and related methods and devices
CN102412931A (zh) * 2011-11-17 2012-04-11 信源通科技（西安）有限公司 多天线比特交织编码系统的串行干扰抵消检测方法及系统
CN103595520A (zh) * 2012-08-16 2014-02-19 华为技术有限公司 通讯装置及其空分双工方法

Also Published As

Publication number Publication date
US10044531B2 (en) 2018-08-07
CN106464420A (zh) 2017-02-22
US20170041165A1 (en) 2017-02-09
CN106464420B (zh) 2019-08-20

Similar Documents

Publication Publication Date Title
WO2015161508A1 (zh) 估计基带自干扰信道响应的方法和装置
CN107615834B (zh) 自适应导频分配的系统和方法
WO2016169492A1 (en) Channel impulse response estimation for full-duplex communication networks
CN111245750B (zh) 频偏估计方法、装置及存储介质
WO2016106662A1 (zh) 在使用非授权频段的小区中传输参考信号的方法及设备
US10237103B2 (en) Changing cyclic prefix (CP) length based on precoder mode selection
US9979503B2 (en) Signal transmission with interference mitigation
JP2009111973A (ja) 干渉プラス雑音のレベルを推定するための方法および装置、ならびにコンピュータプログラム
WO2016080060A1 (ja) 装置
WO2017132806A1 (zh) 配置导频信号的方法及第一设备
WO2015149709A1 (zh) 一种噪声功率估计方法及网络侧设备
JP6561471B2 (ja) 通信装置、通信方法、及び通信プログラム
EP2517508B1 (en) Interference control
CN114245475A (zh) 一种被用于无线通信的节点中的方法和装置
WO2015165102A1 (zh) 用于干扰消除的方法和装置
CN104322130B (zh) 干扰抑制方法、数据传输方法、装置、用户设备和基站
CN111316745B (zh) 一种通信方法及设备、计算机可读存储介质、程序产品
CN107113788A (zh) 通信方法和装置
JP2020522941A (ja) 信号伝送方法、端末デバイスおよびネットワークデバイス
CN116686350A (zh) 基于上行链路和基于下行链路的定位
WO2017190272A1 (zh) 一种干扰消除方法及基站
KR20200103514A (ko) 무선 통신 장치 및 이의 채널 추정 방법
WO2018081992A1 (zh) 通信方法、终端设备和网络设备
CA3061389C (en) Method for transmitting reference signal, terminal and network device
CN109088708A (zh) 一种物联网物理信号设置方法、设备及计算机可读存储介质

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14890325

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14890325

Country of ref document: EP

Kind code of ref document: A1