WO2016165508A1 - 一种信号处理方法、上行资源分配方法及其装置 - Google Patents

一种信号处理方法、上行资源分配方法及其装置 Download PDF

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WO2016165508A1
WO2016165508A1 PCT/CN2016/075868 CN2016075868W WO2016165508A1 WO 2016165508 A1 WO2016165508 A1 WO 2016165508A1 CN 2016075868 W CN2016075868 W CN 2016075868W WO 2016165508 A1 WO2016165508 A1 WO 2016165508A1
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interference
prb
uplink
uplink interference
determining
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French (fr)
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李向宁
任斌
李琼
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China Academy of Telecommunications Technology CATT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2691—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation involving interference determination or cancellation
    • 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
    • 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) or 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
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information

Definitions

  • the present application relates to the field of wireless communications technologies, and in particular, to a signal processing method, an uplink resource allocation method, and an apparatus therefor.
  • the LTE (Long Term Evolution) system is a broadband mobile communication system and is currently being used more and more in the world.
  • LTE Long Term Evolution
  • a significant disadvantage is that it is more susceptible to interference and/or artificial malicious interference from other communication systems in the same frequency band.
  • the uplink of the LTE system adopts the DFT-S-OFDM (Discrete Fourier Transformation-Single Carrier-Orthogonal Frequency Division Multiplexing) technology, and is generally detected in the time domain.
  • DFT-S-OFDM Discrete Fourier Transformation-Single Carrier-Orthogonal Frequency Division Multiplexing
  • the frequency domain signal to interference and noise ratio of the heavily interfered subcarriers will be low, resulting in a decrease in the detection signal to noise ratio of the used time domain symbols, resulting in demodulation performance.
  • Sharply deteriorated That is, in the uplink transmission process of the existing LTE system, strong interference on some subcarriers will reduce the detection signal to noise ratio of all time domain symbols, thereby seriously affecting the demodulation performance of all time domain symbols.
  • the embodiment of the present application provides a signal processing method and device thereof, which are used to improve the anti-interference capability of an uplink shared channel.
  • an embodiment of the present application provides a signal processing method, including:
  • the embodiment of the present application further provides a signal processing apparatus, including:
  • An acquiring unit configured to acquire a received signal after a time domain to a frequency domain transform
  • a frequency domain location determining unit configured to determine, according to the detected uplink interference, a frequency domain location where the strong interference occurs in the time domain to frequency domain transformed received signal, where uplink interference of the received signal in the frequency domain location is higher than Uplink interference threshold;
  • the zeroing unit is configured to zero the signal in the corresponding frequency domain position of the received signal in the time domain to the frequency domain according to the determined frequency domain location where the strong interference is located.
  • the time domain to the frequency domain transformed received signal is obtained, and then the frequency domain location of the strong interference in the received signal from the time domain to the frequency domain is determined according to the detected uplink interference, and finally Zeroing the signal in the corresponding frequency domain position in the time domain to the frequency domain transformed received signal, and zeroing the received signal in the frequency domain position where the strong interference is located, thereby improving the uplink shared channel
  • the anti-interference ability ensures the rate of the uplink shared channel and ensures the performance of the uplink shared channel.
  • the embodiment of the present application further provides an uplink resource allocation method and device thereof, which are used to improve the anti-interference capability of the uplink shared channel.
  • the method includes:
  • the determined transmission resource with the largest capacity is allocated to the terminal for uplink transmission.
  • an uplink resource allocation device including:
  • An obtaining unit configured to acquire the detected uplink interference
  • a transmission resource determining unit configured to determine, according to the detected uplink interference and bandwidth, a transmission resource with the largest capacity from the available transmission resources
  • the resource scheduling unit is configured to allocate the determined transmission resource with the largest capacity to the terminal for uplink transmission.
  • the acquired uplink interference is obtained, and then according to the detected uplink interference and bandwidth, the transmission resource with the largest capacity is determined from the available transmission resources, and the determined transmission resource with the largest capacity is allocated to the terminal.
  • the uplink transmission is performed by allocating the transmission resource with the largest capacity in the uplink shared channel to the terminal for uplink transmission, thereby maximizing the uplink throughput under the interference condition, ensuring the rate of the uplink shared channel, and ensuring the performance of the uplink shared channel.
  • the embodiment of the present application further provides a signal processing method and device thereof, which are used to improve the anti-interference capability of an uplink shared channel.
  • the method includes:
  • the uplink shared channel anti-interference scheme includes interference Zero scheme and frequency selection scheduling scheme;
  • the received signal is processed by using the interference nulling scheme, and if the frequency selective scheduling scheme is determined, the frequency selective scheduling scheme is used for uplink resource allocation;
  • the interference zeroing scheme includes:
  • the frequency selection scheduling scheme includes:
  • the determined transmission resource with the largest capacity is allocated to the terminal for uplink transmission.
  • a signal processing apparatus comprising:
  • a scheme determining unit configured to determine an uplink shared channel anti-interference scheme to be adopted, where the uplink shared channel anti-interference scheme includes an interference nulling scheme and a frequency selective scheduling scheme;
  • the zero scheme includes: acquiring a received signal in a time domain to frequency domain transform; determining, according to the detected uplink interference, a frequency domain location where the strong interference in the received signal from the time domain to the frequency domain is transformed, where the frequency domain location is The uplink interference of the received signal is higher than the uplink interference threshold; and the signal in the corresponding frequency domain position of the received signal in the time domain to the frequency domain is zeroed according to the determined frequency domain position where the strong interference is located;
  • the frequency selection scheduling scheme includes: acquiring the detected uplink interference and bandwidth; determining, according to the detected uplink interference, the transmission resource with the largest capacity from the available transmission resources; and allocating the determined transmission resource with the largest capacity to the terminal for uplink transmission.
  • the uplink shared channel anti-interference scheme that needs to be adopted is determined, where the uplink shared channel anti-interference scheme includes an interference nulling scheme and a frequency selective scheduling scheme; if the interference nulling scheme is determined, the interference zeroing is used.
  • the scheme processes the received signal. If it is determined that the frequency selective scheduling scheme is adopted, the frequency selective scheduling scheme is used for uplink resource allocation. According to the condition, whether to use the interference nulling scheme or the frequency selective scheduling scheme to process the received signal can adaptively track the interference variation in real time, improve the anti-interference capability of the uplink channel, ensure the uplink shared channel rate, and ensure the performance of the uplink shared channel. .
  • FIG. 1 is a schematic flowchart of receiving and transmitting signals by a base station of an LTE system in the prior art
  • FIG. 2 is a schematic flowchart of a base station transmitting and receiving signals of an LTE system according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of a signal processing flow in an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of determining an uplink interference threshold according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an uplink resource allocation process in an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another signal processing flow in the embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a signal processing apparatus according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of an uplink resource allocation apparatus according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another signal processing apparatus according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another signal processing apparatus according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of another uplink resource allocation apparatus according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another signal processing apparatus according to an embodiment of the present application.
  • the sending and receiving process of the DFT-S-OFDM system is described by taking a single-issue and single-receiving system as an example.
  • the embodiment of the present application is not limited thereto, and may also be used in other single-transmission, multi-receiving, and multiple-receiving.
  • the following embodiments are implemented in a system such as multiple transmission and reception.
  • FIG. 1 shows a transmission and reception process of a DFT-S-OFDM system in LTE. Take Single Input Single Output (SISO) as an example.
  • SISO Single Input Single Output
  • the transmitting end sends data bits and encodes and adjusts in the time domain.
  • System after DFT (Discrete Fourier Transform) transform to the frequency domain, after frequency domain resource mapping, IFFT (Invertible Fast Fourier Transformation) is transformed into the time domain and performed.
  • DFT Discrete Fourier Transform
  • IFFT Invertible Fast Fourier Transformation
  • Add CP Cyclic Prefix
  • D/A digital/analog
  • A/D analog/digital
  • Add CP send out by D/A (digital/analog) conversion and up-conversion; at the receiving end, after down-conversion and A/D (analog/digital) conversion, perform CP-free operation
  • FFT Fast Fourier Transformation
  • FDE Frequency Domain Equalization
  • IDFT Invertible Discrete Fourier Transform
  • the inverse transform is transformed into the time domain and then demodulated and decoded in the time domain.
  • modules such as adding CP, de-CP, A/D, D/A, up-conversion and down-conversion are omitted in FIG.
  • T N M is a subcarrier mapping matrix (N ⁇ M dimension)
  • F M is an M point FFT matrix
  • I an N-point IFFT matrix, generally N ⁇ M
  • the frequency domain received signal is expressed as:
  • R is the frequency domain received signal
  • H is the diagonal matrix of the frequency domain channel response
  • the dimension is M ⁇ M
  • n represents the interference and noise signals.
  • H is the diagonal matrix formed by the frequency domain channel response of the subcarrier used after the resource mapping, and the dimension is M ⁇ M ,
  • time domain SINR of the time domain detection symbol can be obtained as:
  • ⁇ 2 is the sum of the noise floor and the interference power on the subcarrier.
  • the equalization factor is:
  • the SINR ZF is obtained as:
  • the equalization coefficient is:
  • the embodiment of the present application provides three solutions.
  • these three schemes are respectively referred to as: interference nulling scheme, frequency selective scheduling scheme, and adaptive scheme.
  • the three solutions are described in detail below.
  • the interference nulling scheme can be performed only on the base station side, such as on the eNB (evovled Node B, evolved Node B) side in the LTE system.
  • eNB evovled Node B, evolved Node B
  • the transmission and receiver of the LTE uplink (DFT-S-OFDM) under the interference nulling scheme can be as shown in FIG. 2, and the transmitter and receiver shown in FIG. 2 are single-issue and single-receiver. (SISO).
  • SISO single-issue and single-receiver.
  • the interference nulling operation is performed after the time domain to frequency domain conversion of the received signal.
  • the basic principle of the interference nulling scheme is to determine the frequency domain position of the uplink strong interference subcarrier based on a certain criterion, and after the FFT is performed at the receiving end, the received signal in the frequency domain position determined to have strong interference is zeroed.
  • the judgment criteria are related to interference, including but not limited to the following criteria:
  • the SINR criterion that is, determining the frequency domain location where the strong interference is located according to the SINR of the uplink signal
  • SIR Signal to Interference Ratio
  • the IoT Interference over Thermal Noise criterion is to determine the frequency domain location where strong interference is located according to the IoT of the uplink signal.
  • IoT is defined as the ratio of received interference power (including noise power) to noise power;
  • the interference power criterion is to determine the frequency domain location where the strong interference is located according to the power of the uplink signal.
  • the above measurements need to consider the combination or averaging of multiple antennas.
  • FIG. 3 shows a signal processing procedure in an interference nulling scheme, which may be performed by a signal processing apparatus, and may be located in a base station or a base station. As shown in FIG. 3, specific steps of the process include :
  • Step S301 Acquire a received signal after time domain to frequency domain transformation.
  • Step S302 determining, according to the detected uplink interference, a strong interference station in the received signal from the time domain to the frequency domain transform.
  • the uplink interference of the received signal in the frequency domain position is higher than the uplink interference threshold.
  • Step S303 according to the determined frequency domain location where the strong interference is located, the signal in the corresponding frequency domain position in the time domain to frequency domain transformed received signal is zeroed.
  • the reference signals for performing interference measurement are not included in the received signal for zeroing, so that the necessary interference measurement or IoT estimation and the like are performed by using the reference signals.
  • the DMRS (De Modulation Reference Signal) is not included in the received signal for zeroing, that is, the DMRS signal is not zeroed when the signal is zeroed.
  • the frequency domain location where the strong interference is located refers to the subcarrier or PRB (Physical Resource Block) where the strong interference is located.
  • PRB Physical Resource Block
  • the received signal on part of the subcarrier or PRB is a strong interference signal.
  • the uplink interference may be some measurement quantity obtained by signal detection, such as SINR, IoT, SIR, interference power, and the like.
  • the uplink interference threshold may be statically set, that is, preset, or may be dynamically calculated. The two methods are described in detail below.
  • Method 1 Statically set the uplink interference threshold
  • the value of the statically set uplink interference threshold can be determined based on empirical values or according to system performance requirements.
  • the static interference threshold set by static can be one or multiple. If the static interference threshold is set to be multiple, each uplink interference threshold corresponds to a different useful signal or reference signal received power level. Correspondingly, before step S302, it is determined that the level of the received signal or the reference signal received power is determined according to the received signal or the reference signal received power, and then the corresponding uplink is determined according to the level of the useful signal or the reference signal received power. The interference threshold, the determined uplink interference threshold will be used in the subsequent steps to determine the frequency domain location where the strong interference in the received signal is located.
  • the IoT threshold can be set according to the simulation and test, and the IoT threshold can be different according to the received power.
  • the RSRP Reference Signal Received Power
  • the power is divided into different levels or ranges. Different levels of RSRP correspond to different IoT thresholds, and the useful signal received power can be divided into different levels or ranges. Different levels of useful signal receiving powers correspond to different IoTa thresholds.
  • the way of setting the uplink interference threshold statically is technically simple and easy. Further, by setting a plurality of uplink interference thresholds, and each uplink interference threshold corresponds to a different useful signal or reference signal receiving power level, a suitable uplink interference threshold may be determined according to the current useful signal or the reference signal received power level, thereby The decision on the frequency domain location where strong interference is present in the received signal is more accurate.
  • Method 2 Dynamically calculate the uplink interference threshold
  • the uplink interference threshold can be determined according to the flow shown in FIG. As shown in FIG. 4, the process may include the following steps:
  • Step S401 Determine a candidate uplink interference threshold set according to the detected uplink interference of all PRBs of the uplink channel.
  • Step S402 determining the signal to interference and noise ratio of each PRB according to the measured noise floor, the uplink interference of each PRB, and the measured average received power of the PUSCH (Physical Uplink Shared Channel) signal of each PRB. SINR value.
  • PUSCH Physical Uplink Shared Channel
  • Step S403 Determine a corresponding PRB set according to each candidate uplink interference threshold, where the uplink interference of the PRB in one PRB set is less than or equal to the candidate uplink interference threshold corresponding to the PRB set.
  • Step S404 determining a time domain detection SINR value corresponding to each PRB set according to the SINR value of each PRB.
  • Step S405 determining a candidate uplink interference threshold corresponding to the PRB set with the largest SINR value in the time domain detection as an uplink interference threshold.
  • the time domain detection SINR value corresponding to each PRB set may be determined by the formula (10), and is recorded as SINR 1 :
  • the SINR 1 is a time domain detection SINR value, and M is the number of all subcarriers occupied by the terminal.
  • the all subcarriers include a zeroed subcarrier, and ⁇ is a zeroed subcarrier (the subcarrier can be considered to be also strongly interfered).
  • a set of numbers of subcarriers w i is an equalization coefficient of the i th subcarrier, and H i is a channel estimation value of the i th subcarrier, Average power of the data symbols for the sender, Conjugation for H i , Is the sum of the noise floor and the interference power on the ith subcarrier.
  • the time domain detection SINR value corresponding to each PRB set may be determined according to formula (11) or formula (12).
  • Formula (11) or formula (12) is obtained by substituting the equalization coefficient w i of ZF equalization into equation (10), and the equalization coefficient at ZF equalization is Equation (11) is:
  • SNIR ZF 1 is the SINR value after time domain ZF detection
  • M is the number of subcarriers occupied by the terminal
  • ⁇ is the numbered set of zeroed subcarriers (subcarriers can be considered as strong interference subcarriers)
  • SINR k Is the signal to interference and noise ratio of the kth subcarrier
  • x is the zero ratio
  • the N RB is the number of PRBs occupied by the terminal
  • N ⁇ is the number of PRBs in the set of zero subcarriers ⁇ .
  • the SINR value of each subcarrier in the above formula (11) can be replaced by the average SINR value of the PRB set of the subcarrier, as shown in the formula (12).
  • Equation (12) is:
  • the SNIR ZF, 1 is the SINR value after the time domain ZF detection
  • the N RB is the number of PRBs occupied by the terminal
  • the ⁇ PRB is the numbered set of the zeroed PRB (the PRB can be regarded as the strongly interfered PRB)
  • SINR PRB is the average SINR value of the kth PRB
  • x is the zeroing ratio. among them, To zero the number of PRBs in the PRB set ⁇ PRB .
  • Equation (13) is:
  • the SNIR MMSE, 1 is the time domain MMSE detecting the SINR value
  • M is the number of subcarriers occupied by the terminal
  • ⁇ is the number set of the zero subcarrier (the subcarrier can be considered as a strong interference subcarrier)
  • the SINR k is Signal to interference and noise ratio of the kth subcarrier.
  • the SINR value of each subcarrier in the above formula (13) may be replaced by the average SINR value of the PRB set of the subcarrier, as shown in the formula (14).
  • Equation (14) is:
  • SNIR MMSE 1 is the time domain MMSE detection SINR value
  • N RB is the number of PRBs occupied by the terminal
  • ⁇ PRB is the number set of zero PRB (the PRB can be considered as a strong interference PRB)
  • SINR PRB is The average SINR value of the kth PRB.
  • the manner of determining the uplink interference threshold is not limited to the foregoing.
  • the embodiments of the present application are merely exemplary functions, and are not limited thereto.
  • the detection vector after frequency domain equalization (FDE):
  • noise power (variance) can be expressed as:
  • the received target is expressed in terms of useful power:
  • the interference power of other symbols to the target symbol is:
  • the interference power of other symbols received by all target symbols is the same.
  • the time domain detection SINR can be expressed as the aforementioned formula (10).
  • step 303 the signal in the corresponding frequency domain position in the time domain to frequency domain transformed received signal may be zeroed according to formula (19):
  • R' is the received signal after zeroing.
  • AWGN Additional White Gaussian Noise
  • Z 0 is an interference nulling matrix whose dimension is N ⁇ N, and the value of N is consistent with the number of columns of the received signal R after time domain to frequency domain transformation.
  • the frequency domain position of the strong interference on the main diagonal of Z 0 is 0, the other position on the main diagonal is 1, and the position on the non-diagonal is 0, Z 0 can be Yes:
  • n z The element corresponding to the position of the interfering subcarrier is set to zero to obtain n z :
  • n z Z 0 nanna together(21)
  • channel estimation is performed by using the frequency domain received signal R' after the interference is set to zero, which can eliminate the influence of strong interference on the channel estimation, thereby improving the anti-interference capability of the uplink shared channel and ensuring the rate of the uplink shared channel, and ensuring The performance of the uplink shared channel.
  • the interference zeroing scheme provided by the above embodiment is used, it can be seen from the equations (7) and (11) that the noise power is reduced to the original (1-x) times. The portion of the interfering signal I 0 on the zeroed subcarrier is completely eliminated.
  • the interference nulling scheme provided by the embodiment of the present application is completely eliminated, the interference signal and the noise on the zeroed subcarrier are completely eliminated, and the useful signal on the zeroed subcarrier is also completely eliminated.
  • the LTE uplink received signal is demodulated in the time domain, and the interference signal and noise are set to zero to improve the time domain demodulation signal to noise ratio.
  • the useful signal is set to zero, the effective power of the time domain is reduced, and a new one is introduced. Inter-symbol interference between time domains.
  • the frequency domain equalization and IDFT transformation are performed on the received signal after zero, and the received signal after IDFT is amplitude-compensated, so that the average value of the received signal after IDFT can fall on the standard constellation point without deviation.
  • the amplitude compensation factor can be set to 1/(1-x) times, where x is the zeroing ratio of a user's signal.
  • strong interference when performing noise and/or CQI (Channel Quality Indicator) measurement on the terminal, strong interference may be used.
  • the uplink reference signal in the frequency domain position other than the frequency domain location is measured, that is, the uplink reference signal in the frequency domain position where the strong interference is located is not used for measurement.
  • the uplink reference signal may be an SRS (Sounding Reference Signal).
  • the SINR may be calculated by using a corresponding algorithm according to different frequency domain equalization methods used, thereby obtaining a CQI. For example, if frequency domain equalization is performed by using ZF detection, the SINR may be calculated using Equation (11), where x in Equation (11) is the zeroed subcarrier of the SRS subcarrier of the terminal, and the SRS subcarrier of the user is occupied. The ratio of the totals, ⁇ , represents the set of zeroed subcarriers in the SRS subcarrier.
  • the SRS subcarrier refers to a subcarrier occupied by the SRS signal.
  • the measurement of the CQI may also use only the subcarriers that do not belong to the zeroed PRB set, but the premise is that the base station side has a CQI correction mechanism, and the CQI can be corrected according to the ACK/NACK feedback of the terminal.
  • the foregoing embodiment shows that the received signal in the time domain to the frequency domain is obtained, and then the frequency domain position of the strong interference in the received signal from the time domain to the frequency domain is determined according to the detected uplink interference, and finally Time domain to frequency
  • the signal in the corresponding frequency domain position of the received signal in the domain is zeroed, and the received signal in the frequency domain position where the strong interference is located is zeroed, thereby improving the anti-interference capability of the uplink shared channel and improving uplink sharing.
  • the rate of the channel ensures the performance of the uplink shared channel.
  • step S301 the base station receives a signal sent by a UE (User Equipment, ie, a terminal), and performs time domain to frequency domain transformation.
  • a UE User Equipment, ie, a terminal
  • step S302 the base station uses the idle time slot or the service time slot to measure the uplink DMRS of the UE, and obtains an IoT value of each subcarrier or each PRB of the UE, and according to each subcarrier or each measured.
  • the IoT value on the PRB calculates the uplink interference threshold.
  • the uplink interference threshold is calculated according to the IoT value on the 100 PRBs of the UE.
  • step S404 And the SINR value of each PRB in the set ⁇ k is substituted into the formula (11) or the formula (12), and the corresponding set ⁇ k is calculated.
  • step S405 the time domain symbol detection signal to noise ratio is determined.
  • the base station determines, according to the determined optimal uplink interference threshold, a PRB set or a set of subcarriers that need to be zeroed, and the set of indexes of the PRB set or the set of subcarriers is denoted as Index Int_Eleminate .
  • step S303 the base station performs zero-setting processing on the signals on all PRBs or subcarriers indicated by Index Int_Eleminate according to the Index Int_Eleminate determined in step S302. Specifically, the received signal on all PRBs or subcarriers belonging to the zeroed PRB set or the set of subcarriers in the vector R obtained by the FFT transform is forcibly set to zero. In the case of multiple receive antennas, multiple antennas that strongly interfere with the PRB or signals on the subcarriers need to be set to zero.
  • the data after the IDFT transform is multiplied by 1/(1-x), where x is the zero ratio of the UE, for example, x is the zeroed PRB.
  • x is the zero ratio of the UE, for example, x is the zeroed PRB.
  • the SRS When the SRS is used to measure noise and CQI, only the PRBs or subcarriers of the subcarriers in which the SRS is located that do not belong to the zeroed PRB set or the set of subcarriers are used for measurement.
  • ZF equalization is taken as an example for analysis.
  • the content introduced by the background can be naturally extended to MMSE equilibrium.
  • the interference nulling scheme described in the above embodiments can be applied not only to the SISO scenario and the SIMO (single input multiple output) scenario.
  • the SINR calculation for each subcarrier or PRB is considered.
  • the antenna combining gains are sufficient.
  • the basic concepts and criteria of the embodiments of the present application are also applicable to a MISO (multiple input single output) and MIMO (multiple input multiple output) scenarios.
  • the frequency selective scheduling scheme can be performed only at the base station, such as on the eNB side in the LTE system.
  • the basic principle of the frequency selective scheduling scheme is: when uplink resource allocation is performed, the transmission resource with the largest capacity is allocated to the UE for uplink transmission. For example, the base station determines the frequency domain location of the uplink strong interference subcarrier based on a certain criterion, and the base station only schedules the user on the subcarrier that is not strongly interfered.
  • the judgment criteria are related to interference, including but not limited to the following criteria:
  • the SINR criterion that is, determining the frequency domain location where the strong interference is located according to the SINR of the uplink signal
  • the SIR criterion is to determine the frequency domain location where the strong interference is located according to the SIR of the uplink signal
  • the IoT criterion is to determine the frequency domain location where strong interference is located based on the IoT of the uplink signal.
  • IoT is defined as the ratio of received interference power (including noise power) to noise power;
  • the interference power criterion is to determine the frequency domain location where the strong interference is located according to the power of the uplink signal.
  • the above measurements need to consider the combination or averaging of multiple antennas.
  • FIG. 5 shows a flow of an uplink resource allocation method in a frequency selective scheduling scheme, which may be performed by a signal processing apparatus, where the apparatus may be located in a base station or a base station, as shown in FIG. 5,
  • the specific steps include:
  • Step S501 Acquire the detected uplink interference.
  • the base station can detect some measured quantities such as SINR, IoT, SIR, and dry. The amount of measurement such as power is disturbed, and the strength of the uplink interference is determined based on these measured quantities. For example, the base station may use the idle time slot or the service time slot to measure the uplink DMRS of the UE, and obtain an IoT value of each subcarrier or each PRB of the UE.
  • Step S502 determining, according to the detected uplink interference and bandwidth, the transmission resource with the largest capacity from the available transmission resources.
  • Step S503 the determined transmission resource with the largest capacity is allocated to the terminal for uplink transmission.
  • determining the transmission resource with the largest capacity from the available transmission resources may include the following methods:
  • each PRB in the candidate PRB set is a plurality of consecutive available PRBs, and then determining each candidate PRB set according to uplink interference on the PRBs in each candidate PRB set.
  • Corresponding channel capacity, and then the PRB set having the largest channel capacity among the candidate PRB sets is determined as the transmission resource with the largest capacity.
  • all available PRB combinations refer to all possible PRB sets obtained by permutation and combination for all PRBs that have not been allocated to any UE.
  • the channel capacity corresponding to a candidate PRB set may refer to a theoretical AWGN capacity, and the calculation formula is as shown in formula (22):
  • C 2 is the AWGN capacity
  • y is the ratio of the actual occupied bandwidth of the user to the total available bandwidth of the user during the frequency selective scheduling
  • B is the total available bandwidth of the user
  • SINR 2 is the time domain detection signal dry noise of the selected PRB set for the frequency selective scheduling. ratio.
  • ⁇ s is a set of subcarriers actually occupied by the user during frequency selective scheduling
  • w i is the equalization coefficient of the ith subcarrier
  • H i is the channel estimation value of the ith subcarrier
  • Average power of the data symbols for the sender, Conjugation for H i Is the sum of the noise floor and the interference power on the ith subcarrier.
  • N is an integer greater than or equal to 1 uplink interference thresholds and perform for each uplink interference threshold The following steps:
  • the available PRBs Selecting, from the available PRBs, at least one PRB set whose uplink interference is lower than the current uplink interference threshold; determining, according to the uplink interference on the PRB, a channel capacity corresponding to each of the at least one PRB set; and the at least one The PRB set having the largest channel capacity in the PRB set is determined as the channel capacity corresponding to the current uplink interference threshold; wherein the available PRB refers to the PRB that has not been allocated to any UE for use;
  • the uplink interference threshold with the largest channel capacity among the N uplink interference thresholds is selected, and the PRB set corresponding to the selected uplink interference threshold is determined as the transmission resource with the largest capacity.
  • the uplink interference threshold may be a parameter of a type such as SINR, SIR, IoT, and interference power.
  • the uplink interference threshold may be statically set, that is, preset.
  • the value of the statically set uplink interference threshold can be determined based on empirical values or according to system performance requirements. For example, when implementing an actual product, consider the achievability and complexity, and set the IoT threshold based on the simulation and test results.
  • the uplink interference threshold may also be dynamically calculated. Specifically, the uplink interference threshold may be determined according to the following steps: determining, according to the uplink interference of all PRBs of the detected uplink channel, a selection range of an uplink interference threshold, where a lower limit of the selected range is the smallest detected uplink interference, where The upper limit of the selected range is the detected maximum uplink interference; and according to the set number of uplink interference thresholds, a corresponding number of uplink interference thresholds are determined within the selected range of the uplink interference threshold. For example, the number of uplink interference thresholds is predetermined to be three, and after determining the selection range of the uplink interference threshold, three values are selected as the uplink interference threshold in the range.
  • the method of statically setting the uplink interference threshold is technically simple and easy; the method for dynamically determining the uplink interference threshold can determine the uplink interference threshold according to the current state of the system, so that the transmission resource with the largest capacity determined based on the uplink interference threshold is obtained. More suitable for allocation to the UE for uplink transmission.
  • the channel capacity corresponding to one candidate PRB set may refer to a theoretical AWGN capacity, and the calculation formula is as shown in formula (22).
  • the formula for calculating SINR 2 in equation (22) is shown in equation (23).
  • the available PRB refers to a PRB that has not been allocated to any UE.
  • the uplink interference threshold may be a parameter of a type such as SINR, SIR, IoT, and interference power.
  • the value of the uplink interference threshold may be determined according to an empirical value or according to system performance requirements. For example, when the actual product is implemented, Consider the achievability and complexity, and set the IoT threshold based on simulation and test results.
  • the selected PRB when performing noise and/or CQI measurement on the terminal, the selected PRB may be used.
  • the upstream reference signal at the set location is measured.
  • the uplink reference signal may be an SRS.
  • the SINR when performing CQI measurement according to the uplink reference signal, the SINR may be calculated by using a corresponding algorithm according to different frequency domain equalization methods used, thereby obtaining a CQI. For example, if frequency domain equalization is performed using ZF detection, the SINR can be calculated using Equation (11) or Equation (12). If frequency domain equalization is performed using MMSE detection, the SINR can be calculated using Equation (13) or Equation (14).
  • the transmission resource with the largest capacity is determined from the available transmission resources, and the determined transmission resource with the largest capacity is allocated to the terminal for uplink transmission, and the uplink shared channel is adopted.
  • the medium-capacity transmission resource is allocated to the terminal for uplink transmission, which can maximize the uplink throughput under the condition of interference, improve the rate of the uplink shared channel, and ensure the performance of the uplink shared channel.
  • the base station may allocate a relatively wide frequency band (corresponding to multiple consecutive PRBs) to the UE according to the interference measurement result.
  • ZF equalization is taken as an example for analysis.
  • the content introduced by the background can be naturally extended to MMSE equilibrium.
  • the interference nulling scheme described in the above embodiments can be applied not only to the SISO scenario and the SIMO (single input multiple output) scenario.
  • the SINR calculation for each subcarrier or PRB is considered.
  • the antenna combining gains are sufficient.
  • the basic concepts and criteria of the embodiments of the present application are also applicable to a MISO (multiple input single output) and MIMO (multiple input multiple output) scenarios.
  • the uplink of LTE Rel-9 does not support discontinuous scheduling, only a relatively long continuous non-strong interference subcarrier can be selected from the occupied frequency band to schedule users, and the bandwidth of the user will be affected. limit.
  • the protocol supports non-continuous scheduling, and supports up to two consecutive resource blocks at different starting positions. The bandwidth allocation of users is more flexible.
  • the frequency selective scheduling scheme provided by the embodiment of the present application can be applied to the case where the terminal and the base station do not support the discontinuous scheduling, and the case where the terminal and the base station support the discontinuous scheduling.
  • the adaptation scheme can be performed only at the base station, such as on the eNB side in the LTE system.
  • adaptive switching between the interference nulling scheme and the frequency selective scheduling scheme can be implemented to obtain optimal performance.
  • FIG. 6 shows a flow of a signal processing method in an adaptive scheme, which may be performed by a signal processing device, which may be located in a base station or a base station, as shown in FIG. 6, the specific steps of the process Includes:
  • Step S601 determining an uplink shared channel anti-interference scheme to be adopted, where the uplink shared channel anti-interference scheme includes an interference nulling scheme and a frequency selective scheduling scheme.
  • Step S602 If it is determined that the interference nulling scheme is adopted, the received signal is processed by using the interference nulling scheme. If the frequency selective scheduling scheme is determined, the frequency selective scheduling scheme is used for uplink resource allocation.
  • the frequency selective scheduling scheme is used for uplink resource allocation.
  • the adaptive scheme can be divided into two types: a semi-static adaptive scheme and a real-time adaptive scheme.
  • the semi-static adaptive scheme achieves low complexity
  • the real-time adaptive scheme can track interference changes in real time.
  • a semi-static adaptive scheme and a real-time adaptive scheme can be deployed in the base station, and different scheme executions can be started according to different scenarios.
  • the semi-static adaptive scheme and the real-time adaptive scheme are described in detail below.
  • the uplink shared channel anti-interference scheme to be adopted may be determined by: acquiring uplink shared channel anti-interference scheme configuration information, where the configuration information indicates that the interference zeroing scheme is adopted. Or a frequency selective scheduling scheme; if the configuration information indicates that the interference nulling scheme is adopted, determining to use the interference nulling scheme to process the received signal; if the configuration information indicates that the frequency selective scheduling scheme is adopted, determining to adopt the The frequency selection scheduling scheme performs uplink resource allocation.
  • the uplink shared channel anti-interference scheme configuration information may be configured on the base station to indicate whether the base station uses the semi-static adaptive scheme or the real-time adaptive scheme.
  • the uplink shared channel anti-interference scheme configuration information may be configured on the base station to indicate that the base station starts the adaptive scheme used in comparison with the current scenario.
  • the interference nulling scheme can be turned on, so that the bandwidth can be fully utilized and the subcarriers that are zeroed are not too much;
  • a scenario with more users or a wider continuous frequency band can be used to enable a frequency selective scheduling scheme, so that different continuous frequency domain resources of interference partitioning can be allocated to different users respectively, or the bandwidth available to a single user is wider.
  • the configuration information indicating that the interference nulling scheme is used is sent in the following cases: the number of subcarriers whose number of terminals is less than the first threshold and the uplink interference is higher than the uplink interference threshold is smaller than the second gate.
  • the limit value, or the subcarrier distribution with the uplink interference higher than the uplink interference threshold, is dispersed.
  • the configuration information indicating that the frequency selection scheduling scheme is used is sent when the number of terminals is greater than or equal to the third threshold, or the maximum number of consecutive PRBs available for the uplink is greater than or equal to a fourth threshold, or uplink.
  • the ratio of the maximum number of consecutive PRBs available to the total number of PRBs that can be allocated to the user is greater than or equal to a fifth threshold, wherein the available PRBs refer to PRBs with interference less than a threshold, the third threshold, The four thresholds and the fifth threshold can be set based on experience.
  • step S601 the first channel capacity is determined according to formula (24), and the second channel capacity is determined according to formula (22) (C 2 in equation (22) can be expressed as the second channel capacity. If the second channel capacity is greater than the first channel capacity, it is determined to use the frequency selective scheduling scheme for uplink resource allocation, otherwise it is determined to use the interference nulling scheme to process the received signal.
  • Equation (24) is:
  • C 1 is the first channel capacity
  • B is the total bandwidth occupied by the user when the interference is set to zero
  • the total bandwidth occupied by the user includes zero-subcarriers
  • SINR 1 is the time domain detection signal dry noise when the interference is set to zero.
  • the ratio SINR 1 is determined by equation (10).
  • the embodiment of the present application is not limited to the foregoing two types of uplink shared channel anti-interference schemes for determining the uplink, and the embodiment of the present application is only an exemplary function.
  • the uplink shared channel anti-interference scheme that needs to be adopted is determined, where the uplink shared channel anti-interference scheme includes an interference nulling scheme and a frequency selective scheduling scheme; if the interference nulling scheme is determined, The received signal is processed by using the interference nulling scheme. If the frequency selective scheduling scheme is determined, the frequency selective scheduling scheme is used for uplink resource allocation. According to the condition selection, whether the interference zeroing scheme or the frequency selective scheduling scheme is used to process the received signal, the interference variation can be tracked adaptively in real time, the anti-interference capability of the uplink channel is improved, the rate of the uplink shared channel is improved, and the performance of the uplink shared channel is ensured. .
  • FIG. 7 shows a signal processing apparatus that can perform a flow of a signal processing method, and the apparatus can be located at a base station or a base station.
  • the apparatus includes:
  • the obtaining unit 701 is configured to acquire a received signal after the time domain to the frequency domain transform
  • the frequency domain location determining unit 702 is configured to determine, according to the detected uplink interference, a frequency domain location where the strong interference occurs in the received signal in the time domain to the frequency domain, where the uplink interference of the received signal in the frequency domain location is high.
  • Uplink interference threshold ;
  • the zeroing unit 703 is configured to zero the signal in the corresponding frequency domain position in the time domain to frequency domain transformed received signal according to the determined frequency domain location where the strong interference is located.
  • the uplink interference threshold is preset.
  • the preset uplink interference threshold is multiple, and each uplink interference threshold corresponds to a different useful signal or reference signal receiving power level;
  • the frequency domain location determining unit 702 is further configured to: before determining, according to the detected uplink interference, the frequency domain location where the strong interference is received in the time domain to the frequency domain transformed received signal, the frequency domain location determining unit 702 is further configured to:
  • the frequency domain location determining unit 702 is further configured to: before determining, according to the detected uplink interference, the frequency domain location where the strong interference is received in the time domain to the frequency domain transformed received signal, the frequency domain location determining unit 702 is further configured to:
  • Determining an uplink interference threshold includes:
  • the candidate uplink interference threshold corresponding to the PRB set with the largest SINR value in the time domain detection is determined as the uplink interference threshold.
  • the frequency domain location determining unit 702 is specifically configured to:
  • the time domain detection SINR value corresponding to each PRB set is determined according to formula (10) and is recorded as SINR 1 .
  • the frequency domain location determining unit 702 is specifically configured to:
  • the time-domain detection SINR value corresponding to each of the PRB sets is determined according to formula (11) or formula (12), and the formula (11) or formula (12) is Substituting the equalization coefficient w i of the ZF equalization into the formula (10); or, if the frequency domain equalization uses the minimum mean square error MMSE equalization, determining each of the above according to formula (13) or formula (14)
  • the SINR value is detected in the time domain corresponding to the PRB set, and the formula (13) or the formula (14) is obtained by substituting the equalization coefficient w i at the time of MMSE equalization into the formula (10).
  • the receiving signal that performs zeroing does not include a reference signal for performing interference measurement.
  • the zeroing unit 703 is further configured to:
  • the received signal after the IDFT is subjected to amplitude compensation.
  • the method further includes: a measuring unit, configured to perform measurement by using a sounding reference signal that is not in the frequency domain position when performing noise and/or CQI measurement on the terminal.
  • a measuring unit configured to perform measurement by using a sounding reference signal that is not in the frequency domain position when performing noise and/or CQI measurement on the terminal.
  • the frequency domain location where the strong interference is located refers to: a subcarrier or a PRB where strong interference is located.
  • FIG. 8 shows an uplink resource allocation apparatus, where the apparatus may perform a flow of an uplink resource allocation method, where the apparatus may be located in a base station or a base station, and the apparatus includes:
  • the obtaining unit 801 is configured to acquire the detected uplink interference.
  • the transmission resource determining unit 802 is configured to determine, according to the detected uplink interference and bandwidth, the transmission resource with the largest capacity from the available transmission resources;
  • the resource scheduling unit 803 is configured to allocate the determined transmission resource with the largest capacity to the terminal for uplink transmission.
  • the transmission resource determining unit 802 is specifically configured to:
  • the PRB set having the largest channel capacity among the candidate PRB sets is determined as the transmission resource with the largest capacity.
  • the transmission resource determining unit 802 is specifically configured to:
  • N is an integer greater than or equal to 1, and is performed for each uplink interference threshold:
  • the uplink interference threshold with the largest channel capacity of the N uplink interference thresholds is selected, and the PRB set corresponding to the selected uplink interference threshold is determined as the transmission resource with the largest capacity.
  • the step of determining an uplink interference threshold includes:
  • the step of determining an uplink interference threshold includes:
  • a corresponding number of uplink interference thresholds are determined within a selected range of the uplink interference threshold according to the set number of uplink interference thresholds.
  • the transmission resource determining unit 802 is specifically configured to:
  • the candidate PRB set having the largest number of PRBs is determined as the transmission resource with the largest capacity.
  • the method further includes: a measuring unit, configured to perform measurement by using the sounding reference signal SRS at the selected PRB set position when performing noise and/or CQI measurement on the terminal.
  • a measuring unit configured to perform measurement by using the sounding reference signal SRS at the selected PRB set position when performing noise and/or CQI measurement on the terminal.
  • FIG. 9 shows a signal processing apparatus that can perform a flow of a signal processing method, and the apparatus can be located in a base station or a base station. As shown in FIG. 9, the apparatus includes:
  • the scheme determining unit 901 is configured to determine an uplink shared channel anti-interference scheme that needs to be adopted, where the uplink shared channel anti-interference scheme includes an interference nulling scheme and a frequency selective scheduling scheme;
  • the processing unit 902 is configured to: if the interference nulling scheme is determined, use the interference nulling scheme to process the received signal, and if the frequency selective scheduling scheme is determined, use the frequency selective scheduling scheme to perform uplink resource allocation;
  • the zeroing scheme includes: acquiring a time domain to frequency domain transformed received signal; determining, according to the detected uplink interference, a frequency domain location where the strong interference is in the time domain to frequency domain transformed received signal, where the frequency domain location The uplink interference of the received signal is higher than the uplink interference threshold; and the signal in the corresponding frequency domain position of the received signal in the time domain to the frequency domain is zeroed according to the determined frequency domain position where the strong interference is located;
  • the frequency selection scheduling scheme includes: acquiring the detected uplink interference; determining, according to the detected uplink interference and bandwidth, the transmission resource with the largest capacity from the available transmission resources; and allocating the determined transmission resource with the largest capacity to the terminal. Uplink transmission.
  • the solution determining unit 901 is specifically configured to:
  • the configuration information indicates that the interference nulling scheme is adopted, determining to use the interference nulling scheme to process the received signal; if the configuration information indicates that the frequency selective scheduling scheme is adopted, determining to use the frequency selective scheduling scheme to perform uplink Resource allocation.
  • the configuration information indicating that the interference nulling scheme is used is sent in the following cases:
  • the number of subcarriers whose number of terminals is less than the first threshold and the uplink interference is higher than the uplink interference threshold is smaller than the second threshold, or the subcarriers whose uplink interference is higher than the uplink interference threshold are dispersed;
  • the configuration information indicating the frequency selection scheduling scheme is sent under the following conditions:
  • the number of terminals is greater than or equal to the third threshold, or the number of consecutive PRBs available for the uplink is greater than or equal to the fourth threshold, or the maximum number of consecutive PRBs available for the uplink and the total number of PRBs that can be allocated to the user.
  • the ratio of the quantity is greater than or equal to a fifth threshold, wherein the available PRB refers to a PRB whose interference is less than a threshold.
  • the solution determining unit 901 is specifically configured to:
  • the second channel capacity is greater than the first channel capacity, determining to use the frequency selective scheduling scheme for uplink resource allocation, and otherwise determining to use the interference nulling scheme to process the received signal.
  • the SINR 1 in the formula (24) is determined by the formula (10).
  • the SINR 2 in the formula (22) is determined by the formula (23).
  • FIG. 10 is a schematic structural diagram of another signal processing apparatus according to an embodiment of the present application.
  • the apparatus can implement the signal processing method of the interference zeroing scheme provided by the foregoing embodiment of the present application.
  • the apparatus can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1001 and various circuits of memory represented by memory 1003.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface, and the transceiver 1002 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1003 can store data used by the processor 1001 in performing operations.
  • the processor 1001 is configured to read a program in the memory 1003, and perform the following process: the transceiver 1002 acquires a time domain to frequency domain transformed received signal, and the processor 1001 determines the time domain to the frequency domain according to the detected uplink interference. a frequency domain position of the received signal in the transformed received signal, wherein the uplink interference of the received signal in the frequency domain position is higher than the uplink interference threshold; and the time domain is determined according to the determined frequency domain location where the strong interference is located The signal in the corresponding frequency domain position in the received signal in the frequency domain is zeroed.
  • the uplink interference threshold is preset.
  • the preset uplink interference threshold is multiple, each uplink interference threshold corresponds to a different useful signal or reference signal received power level; and the time domain to frequency domain transform is determined according to the detected uplink interference.
  • the processor 1001 further determines, according to the useful signal or the reference signal received power, a level to which the received power of the useful signal or the reference signal belongs according to the frequency domain position of the received signal in the received signal; receiving power according to the useful signal or the reference signal The rank to which it belongs determines the corresponding uplink interference threshold.
  • the processor 1001 before determining, according to the detected uplink interference, the frequency domain location where the strong interference occurs in the received signal from the time domain to the frequency domain, the processor 1001 further determines an uplink interference threshold, where the determining the uplink interference
  • the steps of the threshold include:
  • the candidate uplink interference threshold corresponding to the PRB set with the largest SINR value in the time domain detection is determined as the uplink interference threshold.
  • the processor 1001 determines the detected time domain SINR values corresponding to each PRB set according to the formula (10), referred to as SINR 1.
  • SINR 1 the time-domain detection SINR value corresponding to each of the PRB sets is determined according to formula (11) or formula (12), and the formula (11) or formula (12) Is obtained by substituting the equalization coefficient w i of the ZF equalization into the formula (10); or, if the frequency domain equalization uses the minimum mean square error MMSE equalization, determining according to the formula (13) or the formula (14)
  • the SINR value is detected in the time domain corresponding to each PRB set, and the formula (13) or the formula (14) is obtained by substituting the equalization coefficient w i at the time of MMSE equalization into the formula (10).
  • the processor 1001 After the time domain to the frequency domain transformed received signal is zeroed in the corresponding frequency domain position, the processor 1001 performs frequency domain equalization and discrete Fourier inverse transform IDFT on the received signal after the zero is set; The received signal after the IDFT is subjected to amplitude compensation.
  • the processor 1001 When performing noise and/or CQI measurements on the terminal, the processor 1001 performs measurements using a sounding reference signal that is not at the frequency domain location.
  • the received signal that is set to zero does not include a reference signal for performing interference measurement.
  • the frequency domain location where the strong interference is located refers to the subcarrier or PRB where the strong interference is located.
  • the memory 1003 is configured to store one or more executable programs, which are used to configure the processor 1001.
  • FIG. 11 is a schematic structural diagram of another uplink resource allocation apparatus according to an embodiment of the present disclosure.
  • the apparatus may implement an uplink resource allocation method of a frequency selective scheduling scheme provided by the foregoing embodiment of the present application.
  • the apparatus can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1101 and various circuits of memory represented by memory 1103.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface
  • the transceiver 1102 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 can store data used by the processor 1101 when performing operations.
  • the processor 1101 is configured to read a program in the memory 1103, and perform the following process: the transceiver 1102 acquires the detected uplink interference, and the processor 1101 determines the largest capacity from the available transmission resources according to the detected uplink interference and bandwidth. Transmitting resources; allocating the determined transmission resources with the largest capacity to the terminal for uplink transmission.
  • the processor 1101 traverses all available PRB combinations to obtain a candidate PRB set, and the PRBs in each candidate PRB set are multiple consecutive available PRBs; and each uplink interference on the PRBs in each candidate PRB set is determined.
  • the transceiver 1102 acquires N uplink interference thresholds, where N is an integer greater than or equal to 1, and performs, for each uplink interference threshold processor 1101, selecting at least one PRB set whose uplink interference is lower than the current uplink interference threshold from the available PRBs. Determining, according to uplink interference on the PRB, a channel corresponding to each of the at least one PRB set The capacity of the PRB set having the largest channel capacity in the at least one PRB set is determined as the channel capacity corresponding to the current uplink interference threshold; and the uplink interference threshold having the largest channel capacity among the N uplink interference thresholds is selected. The PRB set corresponding to the uplink interference threshold is determined as the transmission resource with the largest capacity.
  • the step of determining the uplink interference threshold includes: the transceiver 1102 acquires a preset uplink interference threshold;
  • the step of determining an uplink interference threshold includes:
  • the processor 1101 determines a selection range of the uplink interference threshold according to the uplink interference of all the PRBs of the detected uplink channel, where the lower limit of the selection range is the detected minimum uplink interference, and the upper limit of the selection range is the detected maximum Uplink interference; determining a corresponding number of uplink interference thresholds within the selected range of the uplink interference threshold according to the set number of uplink interference thresholds.
  • the transceiver 1102 obtains a preset uplink interference threshold.
  • the processor 1101 selects a PRB whose uplink interference is lower than the uplink interference threshold from the available PRBs, and determines a candidate PRB set according to the selected PRB, where each PRB set includes at least one consecutive PRB; the candidate PRB set with the largest number of PRBs is determined as the transmission resource with the largest capacity.
  • the processor 1101 When performing noise and/or CQI measurements on the terminal, the processor 1101 performs measurement using the sounding reference signal SRS at the selected PRB set location.
  • the memory 1103 is configured to store one or more executable programs, and is used to configure the processor 1101.
  • FIG. 12 is a schematic structural diagram of another signal processing apparatus according to an embodiment of the present disclosure.
  • the apparatus can implement the signal processing method of the adaptive scheme provided by the foregoing embodiment of the present application.
  • the apparatus can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1201 and various circuits of memory represented by memory 1203.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface, and the transceiver 1202 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 1201 is responsible for managing the bus architecture and general processing, and the memory 1203 can store data used by the processor 1201 in performing operations.
  • the processor 1201 is configured to read a program in the memory 1203, and perform the following process: the processor 1201 determines an uplink shared channel anti-interference scheme to be adopted, where the uplink shared channel anti-interference scheme includes an interference nulling scheme and a frequency selective scheduling scheme. If it is determined that the interference nulling scheme is adopted, the received signal is processed by using the interference nulling scheme. If the frequency selective scheduling scheme is determined, the frequency selective scheduling scheme is used for uplink resource allocation.
  • the interference zeroing scheme includes: the transceiver 1202 acquires a time domain to frequency domain transformed received signal; and the processor 1201 determines, according to the detected uplink interference, the received signal in the time domain to frequency domain transform.
  • the frequency domain location where the interference is located, the uplink interference of the received signal in the frequency domain position is higher than the uplink interference threshold;
  • the frequency domain location where the interference is located, and the signal in the corresponding frequency domain position in the time domain to frequency domain transformed received signal is zeroed.
  • the frequency selective scheduling solution includes: the transceiver 1202 acquires the detected uplink interference; the processor 1201 determines the transmission resource with the largest capacity from the available transmission resources according to the detected uplink interference and bandwidth; and the largest capacity is determined.
  • the transmission resource is allocated to the terminal for uplink transmission.
  • the transceiver 1202 acquires the uplink shared channel anti-interference scheme configuration information, where the configuration information indicates that the interference nulling scheme or the frequency selective scheduling scheme is adopted, and if the configuration information indicates that the interference nulling scheme is adopted, the processor 1201 determines to adopt the interference.
  • the zeroing scheme processes the received signal. If the configuration information indicates that the frequency selective scheduling scheme is adopted, the processor 1201 determines to use the frequency selective scheduling scheme to perform uplink resource allocation.
  • the configuration information indicating that the interference nulling scheme is used is sent in the following cases: the number of subcarriers whose number of terminals is less than the first threshold and the uplink interference is higher than the uplink interference threshold is less than the second threshold, or the uplink interference is higher than The subcarrier distribution of the uplink interference threshold is distributed; the configuration information indicating the frequency selective scheduling scheme is sent in the following cases: the number of terminals is greater than or equal to the third threshold, or the maximum number of consecutive PRBs available in the uplink is greater than or equal to The four thresholds, or the ratio of the maximum number of consecutive PRBs available for the uplink to the total number of PRBs that can be allocated to the user, is greater than or equal to a fifth threshold, wherein the available PRBs refer to PRBs with interference less than a threshold.
  • the processor 1201 determines a first channel capacity and a second channel capacity, the first channel capacity is determined according to formula (24), the second channel capacity is determined according to formula (22); if the second channel capacity is greater than the The first channel capacity determines to use the frequency selective scheduling scheme for uplink resource allocation, and otherwise determines to use the interference nulling scheme to process the received signal.
  • the SINR 1 in the formula (24) is determined by the formula (10), and the SINR 2 in the formula (22) is determined by the formula (23).
  • the memory 1203 is configured to store one or more executable programs, and is used to configure the processor 1201.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
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Abstract

本申请公开了一种信号处理方法、上行资源分配方法及其装置，所述信号处理方法包括：获取时域到频域变换后的接收信号，根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零，通过对强干扰的所在的频域位置上的接收信号进行置零处理，可以提高上行共享信道的抗干扰能力，提升上行共享信道的速率，保证上行共享信道的性能。

Description

一种信号处理方法、上行资源分配方法及其装置
本申请要求在2015年4月14日提交中国专利局、申请号为201510176881.7、申请名称为“一种信号处理方法、上行资源分配方法及其装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，具体的涉及一种信号处理方法、上行资源分配方法及其装置。
背景技术
LTE(Long Term Evolution,长期演进)系统是宽带移动通信系统，当前在全球得到越来越多的应用。但是在700MHz的应用和其它行业应用，例如军用通信领域中，一个显著缺点是比较容易受到相同频带上其它通信系统的干扰和/或人为的恶意干扰。
LTE系统上行采用DFT-S-OFDM(Discrete Fourier Transformation-Single carrier-Orthogonal Frequency Division Multiplexing，离散傅里叶变换扩展正交频分复用)技术，一般在时域进行检测。检测过程中，在部分子载波受到强干扰的情况下，受到强干扰的子载波的频域信干噪比将会很低，导致所使用时域符号的检测信噪比降低，使得解调性能急剧恶化。也就是在现有的LTE系统的上行链路的传输过程中，部分子载波上的强干扰会使得所有时域符号的检测信噪比降低，从而严重影响所有时域符号的解调性能。
因此，如何在LTE系统上行部分带宽受到强干扰的条件下保证上行共享信道的速率，成为亟待解决的问题。
发明内容
本申请实施例提供一种信号处理方法及其装置，用以提高上行共享信道的抗干扰能力。
为了实现上述目的，本申请实施例提供了一种信号处理方法，包括：
获取时域到频域变换后的接收信号；
根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；
根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零。
相应地，本申请实施例还提供了一种信号处理装置，包括：
获取单元，用于获取时域到频域变换后的接收信号；
频域位置确定单元，用于根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；
置零单元，用于根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零。
在本申请实施例中，通过获取时域到频域变换后的接收信号，然后根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，最后将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零，通过对强干扰的所在的频域位置上的接收信号进行置零处理，可以提高上行共享信道的抗干扰能力，保证上行共享信道的速率，保证上行共享信道的性能。
本申请实施例还提供了一种上行资源分配方法及其装置，用以提高上行共享信道的抗干扰能力。
该方法包括：
获取检测到的上行干扰；
根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源；
将确定出的容量最大的传输资源分配给终端进行上行传输。
相应地，还提供了一种上行资源分配装置，包括：
获取单元，用于获取检测到的上行干扰；
传输资源确定单元，用于根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源；
资源调度单元，用于将确定出的容量最大的传输资源分配给终端进行上行传输。
在本申请实施例中，通过获取检测到的上行干扰，然后根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源，将确定出的容量最大的传输资源分配给终端进行上行传输，通过将上行共享信道中容量最大的传输资源分配给终端进行上行传输，可以在有干扰条件下最大化上行吞吐量，保证上行共享信道的速率，保证上行共享信道的性能。
本申请实施例还提供了一种信号处理方法及其装置，用以提高上行共享信道的抗干扰能力。
该方法包括：
确定需要采用的上行共享信道抗干扰方案，所述上行共享信道抗干扰方案包括干扰置 零方案和频选调度方案；
若确定采用干扰置零方案，则使用干扰置零方案对接收信号进行处理，若确定采用频选调度方案，则使用频选调度方案进行上行链路资源分配；
所述干扰置零方案包括：
获取时域到频域变换后的接收信号；
根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；
根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零；
所述频选调度方案包括：
获取检测到的上行干扰；
根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源；
将确定出的容量最大的传输资源分配给终端进行上行传输。
相应地，还提供了一种信号处理装置，该装置包括：
方案确定单元，用于确定需要采用的上行共享信道抗干扰方案，所述上行共享信道抗干扰方案包括干扰置零方案和频选调度方案；
处理单元，用于若确定采用干扰置零方案，则使用干扰置零方案对接收信号进行处理，若确定采用频选调度方案，则使用频选调度方案进行上行链路资源分配；所述干扰置零方案包括：获取时域到频域变换后的接收信号；根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零；所述频选调度方案包括：获取检测到的上行干扰和带宽；根据检测到的上行干扰，从可用的传输资源中确定容量最大的传输资源；将确定出的容量最大的传输资源分配给终端进行上行传输。
在本申请实施例中，确定需要采用的上行共享信道抗干扰方案，所述上行共享信道抗干扰方案包括干扰置零方案和频选调度方案；若确定采用干扰置零方案，则使用干扰置零方案对接收信号进行处理，若确定采用频选调度方案，则使用频选调度方案进行上行链路资源分配。根据条件选择是使用干扰置零方案还是频选调度方案对接收信号进行处理，可以自适应的实时跟踪干扰变化，提高上行信道的抗干扰能力，保证上行共享信道的速率，保证上行共享信道的性能。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术中一种LTE系统的基站接收信号和发送信号的流程示意图；
图2为本申请实施例中一种LTE系统的基站收发信号的流程示意图；
图3为本申请实施例中一种信号处理流程示意图；
图4为本申请实施例中一种确定上行干扰门限的流程示意图；
图5为本申请实施例中一种上行资源分配流程示意图；
图6为本申请实施例中另一种信号处理流程示意图；
图7为本申请实施例中一种信号处理装置的结构示意图；
图8为本申请实施例中一种上行资源分配装置的结构示意图；
图9为本申请实施例中另一种信号处理装置的结构示意图；
图10为本申请实施例中另一种信号处理装置的结构示意图；
图11为本申请实施例中另一种上行资源分配装置的结构示意图；
图12为本申请实施例中另一种信号处理装置的结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述，显然，所描述的实施例仅仅是本申请一部份实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
为了能更好的解释本申请，下面使用具体的实施例对本申请进行说明，下述本申请实施例中所有过程都是在LTE通信系统中实现的，仅仅出于示例目的，本申请的实施例不限于此，在其它通信系统中同样可以实现下述实施例。
在本申请实施例中，以单发单收系统为例描述DFT-S-OFDM系统的发送和接收过程，本申请的实施例不限于此，还可以在其它单发多收、多发单收、多发多收等系统中实现下述实施例。
图1示出了LTE中DFT-S-OFDM系统的发送和接收过程。以单输入单输出(Single Input Single Output，SISO)为例，在上行链路中，发送端发送数据比特，在时域进行编码、调 制，经过DFT(Discrete Fourier Transform，离散傅里叶变换)变换到频域，进行频域资源映射后，进行IFFT(Invertible Fast Fourier Transformation，快速傅里叶反变换)即为变换到时域、进行加CP(Cyclic Prefix，循环前缀)操作，经过D/A(数/模)变换和上变频发送出去；在接收端，经过下变频和A/D(模/数)变换后，进行去CP操作、再经过FFT(Fast Fourier Transformation，快速傅里叶变换)变换到频域，解资源映射后，进行FDE(Frequency Domain Equalization，频域均衡)，再经IDFT(Invertible Discrete Fourier Transform，离散傅里叶反变换)变换到时域，再在时域进行解调和译码。其中，图1中省略了加CP、去CP、A/D、D/A、上变频和下变频等模块。
对于发送端和/或接收端多天线时的处理过程类似，每个天线对之间做与SISO类似的处理，再进行多天线间的平均或合并处理即可。
在上述上行检测过程以及检测SINR(Signal to Interference and Noise Ratio，信干噪比)过程中，设传输的信号符号为一个长度为M的列向量：
Figure PCTCN2016075868-appb-000001
则不考虑CP的发送信号为：
Figure PCTCN2016075868-appb-000002
其中，TN,M是子载波映射矩阵(N×M维)，FM是M点FFT矩阵、
Figure PCTCN2016075868-appb-000003
是N点IFFT矩阵，一般地N≥M，则频域接收信号表示为：
R＝HFMD+n…………………………(3)
其中，R为频域接收信号，H是频域信道响应的对角矩阵，维度为M×M，n表示干扰和噪声信号。
在理想信道估计中，也就是H′＝H，则FDE和IDFT后的检测向量为：
Figure PCTCN2016075868-appb-000004
其中，W＝diag{w0,w1,…,wM-1}为FDE向量，H为解资源映射后所使用子载波的频域信道响应构成的对角矩阵，其维度为M×M，
Figure PCTCN2016075868-appb-000005
分别为对角矩阵：
Figure PCTCN2016075868-appb-000006
Figure PCTCN2016075868-appb-000007
由此，可以得到时域检测符号的时域SINR为：
Figure PCTCN2016075868-appb-000008
其中，M为终端占用的所有子载波的个数，wk为第k个子载波的均衡系数，Hk为第k个子载波的信道估计值，
Figure PCTCN2016075868-appb-000009
为发送端数据符号平均功率，σ2为子载波上的底噪和干扰功率之和。
如果在频域均衡时使用ZF(Zero Forcing，迫零)均衡器，则均衡系数为：
Figure PCTCN2016075868-appb-000010
代入上述计算时域检测符号的时域SINR的公式，可得SINRZF为：
Figure PCTCN2016075868-appb-000011
其中，
Figure PCTCN2016075868-appb-000012
代表子载波k的信噪比。
如果频域均衡时使用MMSE(Minimum Mean Square Error，最小均方差)均衡器，则均衡系数为：
Figure PCTCN2016075868-appb-000013
将均衡系数wm代入上述计算时域检测符号的时域SINR的式(5)，对应获得如式(9)所示的SINRMMSE：
Figure PCTCN2016075868-appb-000014
其中，
Figure PCTCN2016075868-appb-000015
代表子载波k的信噪比。
由上述描述可知，在部分子载波受到强干扰的情况下，如果将干扰归为噪声一起处理，则受到强干扰子载波的频域信干噪比SNRk将会非常低，导致所有时域符号的检测信噪比降低，使得解调性能急剧恶化。也就是对于DFT-S-OFDM系统，部分子载波上的强干扰会使得所有时域符号的检测信噪比有相同程度的严重降低，从而严重影响所有时域符号的解调性能。
为了解决上述问题，本申请实施例提供了三种解决方案。为了以下便于描述，将这三种方案分别称为：干扰置零方案、频选调度方案、自适应方案。下面分别对这三种解决方案进行详细描述。
(一)干扰置零方案
干扰置零方案可仅在基站侧进行，比如在LET系统中的eNB(evovled Node B，演进节点B)侧进行。
以LTE系统为例，干扰置零方案下LTE上行链路(DFT-S-OFDM)的发射和接收机可如图2所示，图2中所示的发射机和接收机为单发单收(SISO)。从图中可以看出，在对接收信号进行时域到频域变换之后执行干扰置零操作。
干扰置零方案的基本原理是基于某种准则判断上行强干扰子载波的频域位置，在接收端进行FFT之后，对被判定存在强干扰的频域位置上的接收信号进行置零处理。
其中，判断准则与干扰有关，包括但不限于以下准则：
SINR准则，即根据上行信号的SINR确定强干扰所在的频域位置；
SIR(Signal to Interference Ratio，信干比)准则，即根据上行信号的SIR确定强干扰所在的频域位置；
IoT(Interference over Thermal noise，干噪比)准则，即根据上行信号的IoT确定强干扰所在的频域位置。其中，IoT被定义为接收干扰功率(包含噪声功率)与噪声功率的比值；
干扰功率准则，即根据上行信号的功率确定强干扰所在的频域位置。
如果是多天线接收，以上测量量需要考虑多天线的合并或平均。
图3示出了干扰置零方案中的一种信号处理流程，该流程可以由信号处理装置执行，该装置可以位于基站内，也可以是基站，如图3所示，该流程的具体步骤包括：
步骤S301，获取时域到频域变换后的接收信号。
步骤S302，根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所 在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限。
步骤S303，根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零。
可选的，进行置零的接收信号中不包括用于进行干扰测量的参考信号，这样可以保证利用这些参考信号进行必要的干扰测量或IoT估计等。比如，进行置零的接收信号中不包括DMRS(De Modulation Reference Signal，解调参考信号)，即在对信号进行置零时不对DMRS信号进行置零处理。
上述流程中，强干扰所在的频域位置是指强干扰所在的子载波或PRB(Physical Resource Block，物理资源块)。比如，在上行信道受到强干扰的情况下，时域到频域变换后的接收信号中，在部分的子载波或PRB上的接收信号是强干扰的信号。
上述流程中，所述上行干扰可以是通过信号检测得到的一些测量量，如SINR、IoT、SIR、干扰功率等测量量。
所述上行干扰门限可以是静态设置的，即预先设置的，也可以是动态计算得到的，下面分别对这两种方式进行详细说明。
方式一：静态设置上行干扰门限
静态设置的上行干扰门限的取值大小，可根据经验值或者根据系统性能要求来确定。
静态设置的上行干扰门限可以是一个，也可以是多个。如果静态设置的上行干扰门限为多个，则每个上行干扰门限对应不同的有用信号或参考信号接收功率等级。相应地，在步骤S302之前，需要先根据有用信号或参考信号接收功率确定所述有用信号或参考信号接收功率所属的等级，然后根据所述有用信号或参考信号接收功率所属的等级确定对应的上行干扰门限，所确定出的上行干扰门限将用于后续步骤中对接收信号中的强干扰所在的频域位置进行判决。
比如，实际产品实现时，考虑复杂度，可以根据仿真和测试、设置IoT门限值，并且IoT门限值可以随接收功率的不同而不同，比如可将RSRP(Reference Signal Received Power，参考信号接收功率)划分为不同等级或范围，不同等级的RSRP对应不同的IoT门限值，也可以将有用信号接收功率划分为不同等级或范围，不同等级的有用信号接收功率对应不同的IoTa门限值。
可以看出，静态设置上行干扰门限的方式在技术上简单易行。进一步地，通过设置多个上行干扰门限，且每个上行干扰门限对应不同的有用信号或参考信号接收功率等级，可以根据当前有用信号或参考信号接收功率等级确定出适合的上行干扰门限，从而使得对接收信号中强干扰所在的频域位置的判决更为准确。
方式二：动态计算上行干扰门限
举例来说，可按照图4所示的流程确定上行干扰门限。如图4所示，该流程可包括如下步骤：
步骤S401，根据检测到的上行信道所有PRB的上行干扰，确定候选上行干扰门限集合。
步骤S402，根据测量得到的底噪、每个PRB的上行干扰以及测量得到的每个PRB的PUSCH(Physical Uplink Shared Channel，物理下行共享信道)信号平均接收功率，确定每个PRB的信干噪比SINR值。
步骤S403，根据每个候选上行干扰门限确定对应的PRB集合，一个PRB集合中的PRB的上行干扰小于等于该PRB集合对应的候选上行干扰门限。
步骤S404，根据每个PRB的SINR值，确定每个PRB集合对应的时域检测SINR值。
步骤S405，将时域检测SINR值最大的PRB集合所对应的候选上行干扰门限，确定为上行干扰门限。
上述步骤S404中，可由公式(10)确定每个PRB集合对应的时域检测SINR值，记为SINR1：
Figure PCTCN2016075868-appb-000016
其中，SINR1为时域检测SINR值，M为终端占用的所有子载波的数量，所述所有子载波中包括置零子载波，Ω为置零子载波(该子载波可以认为也是受强干扰子载波)的编号集合，wi为第i个子载波的均衡系数，Hi为第i个子载波的信道估计值，
Figure PCTCN2016075868-appb-000017
为发送端数据符号平均功率，
Figure PCTCN2016075868-appb-000018
为Hi的共轭，
Figure PCTCN2016075868-appb-000019
为第i个子载波上的底噪和干扰功率之和。
频域均衡方式有多种，比如有ZF均衡和MMSE均衡。根据采用的频域均衡方式的不同，基于公式(10)的时域检测SINR值的计算公式也会有不同的变形。
在时域检测过程中，若采用ZF均衡，则可根据公式(11)或公式(12)确定每个PRB集合对应的时域检测SINR值。公式(11)或公式(12)是将ZF均衡时的均衡系数wi代入公式(10)后得到的，ZF均衡时的均衡系数为
Figure PCTCN2016075868-appb-000020
公式(11)为：
Figure PCTCN2016075868-appb-000021
其中，SNIRZF,1为时域ZF检测后的SINR值，M为终端占用的子载波的数量，Ω为置零子载波(子载波可以认为是受强干扰子载波)的编号集合，SINRk为第k个子载波的信干噪比，x为置零比率，
Figure PCTCN2016075868-appb-000022
其中，NRB为终端占用的PRB的数量，NΩ为置零子载波集合Ω中的PRB的数量。
为了测量上报和计算简单，上述公式(11)中每个子载波的SINR值可以被该子载波所述PRB集合的平均SINR值代替，具体可见公式(12)所示。
公式(12)为：
Figure PCTCN2016075868-appb-000023
其中，SNIRZF,1为时域ZF检测后的SINR值，NRB为终端占用的PRB的数量，ΩPRB为置零PRB(该PRB可以认为是受强干扰PRB)的编号集合，SINRPRB,k为第k个PRB的平均SINR值，x为置零比率，
Figure PCTCN2016075868-appb-000024
其中，
Figure PCTCN2016075868-appb-000025
为置零PRB集合ΩPRB中的PRB的数量。
在时域检测过程中，若采用MMSE均衡，则可根据公式(13)或公式(14)确定每个PRB集合对应的时域检测SINR值。公式(13)或公式(14)是将MMSE均衡时的均衡系数wi代入公式(10)后得到的，MMSE均衡时的均衡系数为
Figure PCTCN2016075868-appb-000026
公式(13)为：
Figure PCTCN2016075868-appb-000027
其中，SNIRMMSE,1为时域MMSE检测SINR值，M为终端占用的子载波的数量，Ω为 置零子载波(该子载波可以认为是受强干扰子载波)的编号集合，SINRk为第k个子载波的信干噪比。
为了测量上报和计算简单，上述公式(13)中每个子载波的SINR值可以被该子载波所述PRB集合的平均SINR值代替，具体可见公式(14)所示。
公式(14)为：
Figure PCTCN2016075868-appb-000028
其中，SNIRMMSE,1为时域MMSE检测SINR值，NRB为终端占用的PRB的数量，ΩPRB为置零PRB(该PRB可以认为是受强干扰PRB)的编号集合，SINRPRB,k为第k个PRB的平均SINR值。
上行干扰门限的确定方式并不限于上述几种方式，本申请实施例仅是示例作用，不限于此。
其中，公式(10)的推导过程如下所述：
假设信道估计为理想信道估计，则频域均衡(FDE)后的检测向量：
Figure PCTCN2016075868-appb-000029
其中，W＝diag{w0,w1,…,wM-1}为频域均衡向量，
Figure PCTCN2016075868-appb-000030
Figure PCTCN2016075868-appb-000031
考虑理想信道估计，则
Figure PCTCN2016075868-appb-000032
Figure PCTCN2016075868-appb-000033
噪声功率(方差)可表示为：
Figure PCTCN2016075868-appb-000034
接收的目标符有用功率表示为：
Figure PCTCN2016075868-appb-000035
以第0个符号作为目标符号为例，其它符号对目标符号的干扰功率为：
Figure PCTCN2016075868-appb-000036
也就是所有目标符号所受的其他符号的干扰功率相同。
则时域检测SINR可表示为前述公式(10)。
步骤303中，可以根据公式(19)将时域到频域变换后的接收信号中相应频域位置上的信号进行置零：
R′＝Z0R＝Z0(HFMD+n)＝HzFMD+nz…………………(19)
其中，R′为置零之后的接收信号。R为时域到频域变换后的接收信号，即解资源映射后的矢量，R＝HFMD+n，其中矢量n包含两部分：AWGN(Additive White Gaussian Noise，加性高斯白噪声)和干扰。
Z0为维度是N×N的干扰置零矩阵，N的取值与时域到频域变换后的接收信号R的列数一致。Z0的主对角线上的强干扰所在的频域位置取值为0，主对角线上的其它位置取值为1，非对角线上的位置取值为0，Z0形态可以是：
Figure PCTCN2016075868-appb-000037
H主对角线上、与干扰子载波对应位置的元素置零得到Hz：
Hz＝Z0H…………………(20)
n的与干扰子载波位置对应的元素置零得到nz：
nz＝Z0n…………………(21)
上述公式(19)仅是对时域到频域变换后的接收信号中相应频域位置上的信号进行置零的一种实施方式，具体应用过程中，并不限于此。
通过上述实施例，利用干扰置零之后的频域接收信号R′进行信道估计，可以消除强干扰对信道估计的影响，从而可以提高上行共享信道的抗干扰能力，保证上行共享信道的速率，保证上行共享信道的性能。举例来说，采用ZF检测时，若采用上述实施例提供的干扰置零方案，则根据式(7)和式(11)可以看出，噪声功率降为原来的(1-x)倍，原来的干扰信号I0在置零子载波上的部分被完全消除。
采用本申请实施例提供的干扰置零方案时，被置零子载波上的干扰信号和噪声均完全被消除掉以外，该被置零子载波上的有用信号也被完全消除。LTE上行接收信号是在时域进行解调，干扰信号和噪声被置零有利于提高时域解调信噪比，但是有用信号被置零会使得时域有效接收信号功率下降、同时引入新的时域符号间干扰。
为了解决上述问题，在本申请的另一个实施例中，在采取前述方式将时域到频域变换后的接收信号中相应频域位置上的信号进行置零之后、进行信号解调之前，还要对置零后的接收信号进行频域均衡和IDFT变换，并将经过IDFT后的接收信号进行幅度补偿，以使得经过IDFT后的接收信号的均值能够落在标准星座图点上而不发生偏置。比如，若采用ZF检测，则可设置幅度补偿因子为1/(1-x)倍，其中x为一个用户的信号的置零比率。
可选的，本申请的另一个实施例中，在采用上述干扰置零方案的基础上，当对终端进行噪声和/或CQI(Channel Quality Indicator，信道质量指示符)测量时，可以使用强干扰所在的频域位置以外的频域位置上的上行参考信号进行测量，即不使用强干扰所在的频域位置上的上行参考信号进行测量。所述上行参考信号可以是SRS(Sounding Reference Signal，探测参考信号)。
进一步地，在根据上行参考信号进行CQI测量时，根据所使用的频域均衡方式的不同，可采用相应的算法计算SINR，从而得到CQI。例如，如果采用ZF检测进行频域均衡，则可使用公式(11)计算SINR，其中，公式(11)中的x为终端的SRS子载波中被置零的子载波占该用户的SRS子载波总数的比率，Ω表示SRS子载波中置零子载波的集合。其中，所述SRS子载波是指SRS信号所占用的子载波。
需要注意的是，CQI的测量也可以仅使用不属于置零PRB集合的子载波，但是前提是基站侧有CQI修正机制、可以根据终端的ACK/NACK反馈进行CQI的修正。
上述实施例表明，通过获取时域到频域变换后的接收信号，然后根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，最后将所述时域到频 域变换后的接收信号中相应频域位置上的信号进行置零，通过对强干扰的所在的频域位置上的接收信号进行置零处理，可以提高上行共享信道的抗干扰能力，提升上行共享信道的速率，保证上行共享信道的性能。
为了更好的解释本申请，以下结合具体的实施应用场景，描述干扰置零方案的具体实现过程。以下给出全带宽(20MHz)调度、单用户时干扰置零的一个实施例。
在步骤S301中，基站接收UE(User Equipment，用户设备，即终端)发送的信号，进行时域到频域的变换。
在步骤S302中，基站利用空闲时隙或业务时隙，对该UE的上行DMRS进行测量，得到该UE的每个子载波或每个PRB的IoT值，并根据测量得到的每个子载波或每个PRB上的IoT值计算上行干扰门限。
具体地，以根据该UE的100个PRB上的IoT值计算上行干扰门限为例，在步骤S401中，基站对该UE占的100个PRB的IoT从大到小进行排序，得到IoT集合ΩIoT＝{IoT′k}，k＝1,2,…,NIOT，NIOT为IoT集合中元素的个数，NIOT≤100。
在步骤S402中，基站计算100个PRB的SINRk值，k＝1,2,…,100。具体地，基站根据测量得到的底噪和每个PRB的IoT值IoTk，得到每个PRB的干扰与噪声功率，再由测量得到的每个PRB的接收信号功率，以及考虑多天线合并带来的增益，可以计算得到每个PRB的SINRk值。
在步骤S403中，将IoT′k作为候选上行干扰门限，每个候选上行干扰门限对应一个PRB集合Ωk(k＝1,2,…,NIOT)，该PRB集合中的每个PRB的IoT值小于等于该候选上行干扰门限IoT′k的PRB集合为，集合Ωk中的PRB个数为
Figure PCTCN2016075868-appb-000038
在步骤S404中，将
Figure PCTCN2016075868-appb-000039
以及集合Ωk中每个PRB的SINR值代入公式(11)或公式(12)，计算得到集合Ωk对应的
Figure PCTCN2016075868-appb-000040
为使用集合Ωk包含的PRB(集合外的所有PRB置零)进行检测时的时域检测信干噪比。
在步骤S405中，求使得时域符号检测信噪比
Figure PCTCN2016075868-appb-000041
取得最大值时的PRB集合Ωk max：
Figure PCTCN2016075868-appb-000042
与该集合Ωk max相对应的IoT门限值即为最优IoT门限值：IoTTH＝IoT′k max。该最优IoT门限值将用于后续处理流程。
基站根据确定出的最优上行干扰门限，确定需要被置零的PRB集合或子载波集合，该 PRB集合或子载波集合的索引的集合记为IndexInt_Eleminate。
在步骤S303中，基站根据步骤S302中确定出的IndexInt_Eleminate，对IndexInt_Eleminate所指示的所有PRB或子载波上的信号进行置零处理。具体地，对FFT变换得到的向量R中属于置零PRB集合或子载波集合中的所有PRB或子载波上的接收信号强制设置为0。如果是多个接收天线，多天线强干扰PRB或子载波上的信号都需要置零。
进一步地，以采用ZF检测为例，在解调之前，对IDFT变换之后的数据乘以1/(1-x)，其中x为该UE的置零比率，比如，x为被置零的PRB与该UE的PRB总数量的比率。
在使用SRS对噪声和CQI进行测量时，仅使用SRS所在子载波中不属于置零PRB集合或子载波集合的PRB或子载波进行测量。
以上论述中以ZF均衡为例进行分析，由背景介绍的内容，可自然推广到MMSE均衡。
以上各实施例描述的干扰置零方案不仅可以适用于SISO场景和SIMO(single input multiple output，单输入多输出)场景，针对多天线的情况，在对每个子载波或PRB的SINR计算时考虑多天线合并增益即可，这样，本申请实施例的基本思想和准则也适用于MISO(multiple input single output，多输入单输出)和MIMO(multiple input multiple output，多输入多输出)场景。
(二)频选调度方案
频选调度方案可仅在基站进行，比如在LET系统中的eNB侧进行。
频选调度方案的基本原理是：在进行上行资源分配时，将容量最大的传输资源分配给UE进行上行传输。比如，基站基于某种准则判断上行强干扰子载波的频域位置，基站仅在未受强干扰的子载波对用户进行调度。
其中，判断准则与干扰有关，包括但不限于以下准则：
SINR准则，即根据上行信号的SINR确定强干扰所在的频域位置；
SIR准则，即根据上行信号的SIR确定强干扰所在的频域位置；
IoT准则，即根据上行信号的IoT确定强干扰所在的频域位置。其中，IoT被定义为接收干扰功率(包含噪声功率)与噪声功率的比值；
干扰功率准则，即根据上行信号的功率确定强干扰所在的频域位置。
如果是多天线接收，以上测量量需要考虑多天线的合并或平均。
图5示出了频选调度方案中的一种上行资源分配方法的流程，该流程可以由信号处理装置执行，该装置可以位于基站内，也可以是基站，如图5所示，该流程的具体步骤包括：
步骤S501，获取检测到的上行干扰。
在实际应用中，基站可以通过信号检测得到的一些测量量，如SINR、IoT、SIR、干 扰功率等测量量，从而根据这些测量量确定上行干扰的强弱。比如，基站可以利用空闲时隙或业务时隙，对UE的上行DMRS进行测量，得到该UE的每个子载波或每个PRB的IoT值。
步骤S502，根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源。
步骤S503，将确定出的容量最大的传输资源分配给终端进行上行传输。
上述流程的步骤S502中，从可用的传输资源中确定容量最大的传输资源可以包括下述几种方式：
方式一
首先遍历所有可用的PRB组合，得到候选PRB集合，每个候选PRB集合内的PRB为多个连续可用的PRB，然后根据每个候选PRB集合中的PRB上的上行干扰，确定每个候选PRB集合对应的信道容量，之后将候选PRB集合中具有最大信道容量的PRB集合，确定为容量最大的传输资源。
其中，所述“所有可用的PRB组合”是指：针对尚未分配给任何UE使用的所有PRB，采用排列组合方式得到的所有可能的PRB集合。
上述方式一中，一个候选PRB集合对应的信道容量可以是指理论AWGN容量，其计算公式如公式(22)：
C2＝yB*log2(1+SINR2)…………………………(22)
其中，C2为AWGN容量，y为频选调度时用户实际占用带宽与用户可用总带宽的比例，B为用户可用总带宽，SINR2为频选调度所选用PRB集合的时域检测信干噪比。
其中，公式(22)中的SINR2的计算公式为：
Figure PCTCN2016075868-appb-000043
其中，Ωs为频选调度时用户实际占用的子载波集合，
Figure PCTCN2016075868-appb-000044
为集合Ωs中元素的数量，wi为第i个子载波的均衡系数，Hi为第i个子载波的信道估计值，
Figure PCTCN2016075868-appb-000045
为发送端数据符号平均功率，
Figure PCTCN2016075868-appb-000046
为Hi的共轭，
Figure PCTCN2016075868-appb-000047
为第i个子载波上的底噪和干扰功率之和。
方式二
获取N(N为大于或等于1的整数)个上行干扰门限，并针对每个上行干扰门限执行 以下步骤：
从可用PRB中选择上行干扰低于当前上行干扰门限的至少1个PRB集合；根据PRB上的上行干扰，确定所述至少1个PRB集合中每个集合对应的信道容量；将所述至少1个PRB集合中具有最大信道容量的PRB集合，确定为当前上行干扰门限对应的信道容量；其中，可用PRB是指尚未分配给任何UE使用的PRB；
然后，选取所述N个上行干扰门限中具有最大信道容量的上行干扰门限，将选取的上行干扰门限所对应的PRB集合确定为容量最大的传输资源。
其中，所述上行干扰门限可以是SINR、SIR、IoT、干扰功率等类型的参数。
所述上行干扰门限可以是静态设置的，即预先设置的。静态设置的上行干扰门限的取值大小，可根据经验值或者根据系统性能要求来确定。比如，实际产品实现时，考虑可实现性和复杂度，根据仿真和测试结果来设置IoT门限值。
所述上行干扰门限也可以是动态计算得到的。具体地，上行干扰门限可以根据下述步骤确定：根据检测到的上行信道的所有PRB的上行干扰，确定上行干扰门限的选择范围，所述选择范围的下限为检测到的最小的上行干扰，所述选择范围的上限为检测到的最大的上行干扰；根据设定的上行干扰门限的数量，在所述上行干扰门限的选择范围内确定相应数量的上行干扰门限。比如，预先规定上行干扰门限的数量为3个，在在确定出上行干扰门限的选择范围后，在该范围中选择3个数值作为上行干扰门限。
上述静态设置上行干扰门限的方式，在技术上简单易行；上述动态确定上行干扰门限的方式，可根据系统当前的状态确定上行干扰门限，从而使基于上行干扰门限确定出的容量最大的传输资源更适合分配给UE进行上行传输。
当然，这里仅示例性地给出了一种简单易行的上行干扰门限确定方法，但本申请实施例并不仅限于此。
上述方式二中，一个候选PRB集合对应的信道容量可以是指理论AWGN容量，其计算公式如公式(22)。公式(22)中的SINR2的计算公式见公式(23)。
方式三
获取预先设置的上行干扰门限；从可用PRB中选择上行干扰低于所述上行干扰门限的PRB，根据选择出的PRB确定候选PRB集合，每个PRB集合中包含至少一个连续的PRB；然后，将具有最大PRB数量的候选PRB集合，确定为容量最大的传输资源。其中，可用PRB是指尚未分配给任何UE使用的PRB。
所述上行干扰门限可以是SINR、SIR、IoT、干扰功率等类型的参数。所述上行干扰门限的取值大小，可根据经验值或者根据系统性能要求来确定。比如，实际产品实现时， 考虑可实现性和复杂度，根据仿真和测试结果来设置IoT门限值。
可选的，本申请的另一实施例中，在采用上述频选调度方案的基础上，在上述信号处理的过程中，当对终端进行噪声和/或CQI测量时，可以使用选择出的PRB集合位置上的上行参考信号进行测量。所述上行参考信号可以是SRS。
进一步地，在根据上行参考信号进行CQI测量时，根据所使用的频域均衡方式的不同，可采用相应的算法计算SINR，从而得到CQI。例如，如果采用ZF检测进行频域均衡，则可使用公式(11)或公式(12)计算SINR，如果采用MMSE检测进行频域均衡，则可使用公式(13)或公式(14)计算SINR。
上述频选调度方案中，根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源，将确定出的容量最大的传输资源分配给终端进行上行传输，通过把上行共享信道中容量最大的传输资源分配给终端进行上行传输，可以在有干扰条件下最大化上行吞吐量，提升上行共享信道的速率，保证上行共享信道的性能。
应用本申请实施例提供的频选调度方案，基站可根据干扰测量结果，给UE分配一段相对较宽的、无强干扰的频段(对应多个连续的PRB)。
以上论述中以ZF均衡为例进行分析，由背景介绍的内容，可自然推广到MMSE均衡。
以上各实施例描述的干扰置零方案不仅可以适用于SISO场景和SIMO(single input multiple output，单输入多输出)场景，针对多天线的情况，在对每个子载波或PRB的SINR计算时考虑多天线合并增益即可，这样，本申请实施例的基本思想和准则也适用于MISO(multiple input single output，多输入单输出)和MIMO(multiple input multiple output，多输入多输出)场景。
需要特别指出的是，由于LTE Rel-9的上行不支持非连续调度，只能从占用频带内选择相对较宽的一段连续的、非强干扰子载波对用户进行调度，用户的带宽将会受到限制。而对于LTE Rel-10及以后的版本，协议已经支持非连续调度，最多支持两个不同起始位置的连续资源块，用户的带宽分配更为灵活。本申请实施例提供的频选调度方案既可适用于终端和基站不支持非连续调度的情况，也适用于终端和基站支持非连续调度的情况。
(三)自适应方案
自适应方案可仅在基站进行，比如在LET系统中的eNB侧进行。
通过自适应方案，可实现在干扰置零方案和频选调度方案两种方案之间进行自适应的切换，以获得最佳性能。
图6示出了自适应方案中的一种信号处理方法的流程，该流程可以由信号处理装置执行，该装置可以位于基站内，也可以是基站，如图6所示，该流程的具体步骤包括：
步骤S601，确定需要采用的上行共享信道抗干扰方案，所述上行共享信道抗干扰方案包括干扰置零方案和频选调度方案。
步骤S602，若确定采用干扰置零方案，则使用干扰置零方案对接收信号进行处理，若确定采用频选调度方案，则使用频选调度方案进行上行链路资源分配。其中，所述干扰置零方案和所述频选调度方案的实现过程，请参见前述实施例的描述，在此不再赘述。
根据以上流程，自适应方案可以分为两种：半静态自适应方案和实时自适应方案。其中，半静态自适应方案实现复杂度低，实时自适应方案能够实时跟踪干扰变化。可在基站中部署半静态自适应方案和实时自适应方案，根据不同场景开启不同的方案执行。
下面分别对半静态自适应方案和实时自适应方案进行详细说明。
若采用半静态自适应方案，则在步骤S601中，可以通过下述方式确定需要采用的上行共享信道抗干扰方案：获取上行共享信道抗干扰方案配置信息，所述配置信息指示采用干扰置零方案或频选调度方案；若所述配置信息指示采用干扰置零方案，则确定采用所述干扰置零方案对接收信号进行处理；若所述配置信息指示采用频选调度方案，则确定采用所述频选调度方案进行上行资源分配。比如，可在基站上配置上行共享信道抗干扰方案配置信息，以指示基站使用半静态自适应方案还是使用实时自适应方案。
根据场景的不同，可以在基站上配置上行共享信道抗干扰方案配置信息，以指示基站开启与当前场景相使用的自适应方案。
一般情况下，对于用户较少且受强干扰子载波数较少，或者干扰较为分散的场景，可开启干扰置零方案，这样是可以充分利用带宽并且置零的子载波不会太多；对于用户较多的场景或者可用的连续频带较宽的场景，可开启频选调度方案，这样可以将干扰分割的不同连续频域资源分别分配给不同的用户，或者对于单个用户可用的带宽较宽。
基于以上分析，本申请实施例中，指示采用干扰置零方案的配置信息在以下情况下被发送：终端数量小于第一门限值且上行干扰高于上行干扰门限的子载波数量小于第二门限值，或者上行干扰高于上行干扰门限的子载波分布分散。指示采用频选调度方案的配置信息在以下情况下发送：终端数量大于等于所述第三门限值，或者上行链路最大可用的连续PRB的数量大于等于第四门限值，或者上行链路最大可用的连续PRB数量与可分配给该用户的PRB总数量的比值大于等于第五门限值，其中，所述可用的PRB是指干扰小于门限的PRB，所述第三门限值、第四门限值、第五门限值可以依据经验设置。
若采用实时自适应方案，则在步骤S601中，根据公式(24)确定第一信道容量，根据公式(22)确定第二信道容量(公式(22)中的C2可以表示为第二信道容量)，若第二信道容量大于第一信道容量，则确定使用频选调度方案进行上行资源分配，否则确定使用 干扰置零方案对接收信号进行处理。
公式(24)为：
C1＝B*log2(1+SINR1)………………………(24)
其中，C1为第一信道容量，B为干扰置零时用户所占总带宽，所述用户所占总带宽中包括置零子载波，SINR1为干扰置零时的时域检测信干噪比、所述SINR1由公式(10)确定。
本申请实施例并不限于上述两种确定上行需要采用的上行共享信道抗干扰方案，本申请实施例仅是示例作用。
本申请实施例提供的自适应方案中，确定需要采用的上行共享信道抗干扰方案，所述上行共享信道抗干扰方案包括干扰置零方案和频选调度方案；若确定采用干扰置零方案，则使用干扰置零方案对接收信号进行处理，若确定采用频选调度方案，则使用频选调度方案进行上行链路资源分配。根据条件选择是使用干扰置零方案还是频选调度方案对接收信号进行处理，可以自适应的实时跟踪干扰变化，提高上行信道的抗干扰能力，提升上行共享信道的速率，保证上行共享信道的性能。
基于相同的发明构思，图7示出了一种信号处理装置，该装置可以执行信号处理方法的流程，该装置可以位于基站，也可以是基站，如图7所示，该装置包括：
获取单元701，用于获取时域到频域变换后的接收信号；
频域位置确定单元702，用于根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；
置零单元703，用于根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零。
可选的，所述上行干扰门限为预先设置的。
可选的，所述预先设置的上行干扰门限为多个，每个上行干扰门限对应不同的有用信号或参考信号接收功率等级；
所述根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置之前，所述频域位置确定单元702还用于：
根据有用信号或参考信号接收功率确定所述有用信号或参考信号接收功率所属的等级；
根据所述有用信号或参考信号接收功率所属的等级确定对应的上行干扰门限。
可选的，所述根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置之前，所述频域位置确定单元702还用于：
确定上行干扰门限，所述确定上行干扰门限的步骤包括：
根据检测到的上行信道所有PRB的上行干扰，确定候选上行干扰门限集合；
根据测量得到的底噪、每个PRB的上行干扰以及测量得到的每个RPB的PUSCH信号平均接收功率，确定每个PRB的信干噪比SINR值；
根据每个候选上行干扰门限确定对应的PRB集合，一个PRB集合中的PRB的上行干扰小于等于该PRB集合对应的候选上行干扰门限；
根据每个PRB的SINR值，确定每个PRB集合对应的时域检测SINR值；
将时域检测SINR值最大的PRB集合所对应的候选上行干扰门限，确定为上行干扰门限。
可选的，所述频域位置确定单元702具体用于：
根据公式(10)确定每个PRB集合对应的时域检测SINR值，记为SINR1。
可选的，所述频域位置确定单元702具体用于：
若频域均衡使用的是迫零ZF均衡，则根据公式(11)或公式(12)确定所述每个PRB集合对应的时域检测SINR值，所述公式(11)或公式(12)是将ZF均衡时的均衡系数wi代入所述公式(10)后得到的；或者，若频域均衡使用的是最小均方差MMSE均衡，则根据公式(13)或公式(14)确定所述每个PRB集合对应的时域检测SINR值，所述公式(13)或公式(14)是将MMSE均衡时的均衡系数wi代入所述公式(10)后得到的。
可选的，所述进行置零的接收信号不包括用于进行干扰测量的参考信号。
可选的，所述将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零之后，所述置零单元703还用于：
对置零后的接收信号进行频域均衡和离散傅里叶反变换IDFT；
将经过IDFT后的接收信号进行幅度补偿。
可选的，还包括：测量单元，具体用于当对终端进行噪声和/或CQI测量时，使用不在所述频域位置上的探测参考信号进行测量。
可选的，所述强干扰所在的频域位置是指：强干扰所在的子载波或PRB。
图8示出一种上行资源分配装置，该装置可以执行上行资源分配方法的流程，该装置可以位于基站内，也可以是基站，该装置包括：
获取单元801，用于获取检测到的上行干扰；
传输资源确定单元802，用于根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源；
资源调度单元803，用于将确定出的容量最大的传输资源分配给终端进行上行传输。
可选的，所述传输资源确定单元802具体用于：
遍历所有可用的PRB组合，得到候选PRB集合，每个候选PRB集合内的PRB为多个连续可用的PRB；
根据每个候选PRB集合中的PRB上的上行干扰，确定每个候选PRB集合对应的信道容量；
将所述候选PRB集合中具有最大信道容量的PRB集合，确定为容量最大的传输资源。
可选的，所述传输资源确定单元802具体用于：
获取N个上行干扰门限，N为大于或等于1的整数，并针对每个上行干扰门限执行：
从可用PRB中选择上行干扰低于当前上行干扰门限的至少1个PRB集合；
根据PRB上的上行干扰，确定所述至少1个PRB集合中每个集合对应的信道容量；
将所述至少1个PRB集合中具有最大信道容量的PRB集合，确定为当前上行干扰门限对应的信道容量；
选取所述N个上行干扰门限中具有最大信道容量的上行干扰门限，将选取的上行干扰门限所对应的PRB集合确定为容量最大的传输资源。
可选的，所述确定上行干扰门限的步骤包括：
获取预先设置的上行干扰门限；
或者，所述确定上行干扰门限的步骤包括：
根据检测到的上行信道的所有PRB的上行干扰，确定上行干扰门限的选择范围，所述选择范围的下限为检测到的最小的上行干扰，所述选择范围的上限为检测到的最大的上行干扰；
根据设定的上行干扰门限的数量，在所述上行干扰门限的选择范围内确定相应数量的上行干扰门限。
可选的，所述传输资源确定单元802具体用于：
获取预先设置的上行干扰门限；
从可用PRB中选择上行干扰低于所述上行干扰门限的PRB，根据选择出的PRB确定候选PRB集合，每个PRB集合中包含至少一个连续的PRB；
将具有最大PRB数量的候选PRB集合，确定为容量最大的传输资源。
可选的，还包括：测量单元，具体用于当对终端进行噪声和/或CQI测量时，使用选择出的PRB集合位置上的探测参考信号SRS进行测量。
图9示出了一种信号处理装置，该装置可以执行信号处理方法的流程，该装置可以位于基站内，也可以是基站，如图9所示，该装置包括：
方案确定单元901，用于确定需要采用的上行共享信道抗干扰方案，所述上行共享信道抗干扰方案包括干扰置零方案和频选调度方案；
处理单元902，用于若确定采用干扰置零方案，则使用干扰置零方案对接收信号进行处理，若确定采用频选调度方案，则使用频选调度方案进行上行链路资源分配；所述干扰置零方案包括：获取时域到频域变换后的接收信号；根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零；所述频选调度方案包括：获取检测到的上行干扰；根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源；将确定出的容量最大的传输资源分配给终端进行上行传输。
可选的，所述方案确定单元901具体用于：
获取上行共享信道抗干扰方案配置信息，所述配置信息指示采用干扰置零方案或频选调度方案；
若所述配置信息指示采用干扰置零方案，则确定采用所述干扰置零方案对接收信号进行处理；若所述配置信息指示采用频选调度方案，则确定采用所述频选调度方案进行上行资源分配。
可选的，指示采用干扰置零方案的配置信息在以下情况下被发送：
终端数量小于第一门限值且上行干扰高于上行干扰门限的子载波数量小于第二门限值，或者上行干扰高于上行干扰门限的子载波分布分散；
指示采用频选调度方案的配置信息在以下情况下发送：
终端数量大于等于所述第三门限值，或者上行链路最大可用的连续PRB的数量大于等于第四门限值，或者上行链路最大可用的连续PRB数量与可分配给该用户的PRB总数量的比值大于等于第五门限值，其中，所述可用的PRB是指干扰小于门限的PRB。
可选的，所述方案确定单元901具体用于
确定第一信道容量和第二信道容量，所述第一信道容量根据公式(24)确定，所述第二信道容量根据公式(22)确定；
若所述第二信道容量大于所述第一信道容量，则确定使用所述频选调度方案进行上行资源分配，否则确定使用所述干扰置零方案对接收信号进行处理。
可选的，所述公式(24)中SINR1由公式(10)确定。
可选的，所述公式(22)中SINR2由公式(23)确定。
基于相同的发明构思，图10为本申请实施例提供的另一种信号处理装置的结构示意图，该装置可实现本申请上述实施例提供的干扰置零方案的信号处理方法。该装置可包括：任意数量的互联的总线和桥，具体由处理器1001代表的一个或多个处理器和存储器1003代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口，收发机1002可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器1001负责管理总线架构和通常的处理，存储器1003可以存储处理器1001在执行操作时所使用的数据。
处理器1001，用于读取存储器1003中的程序，执行下列过程：收发机1002获取时域到频域变换后的接收信号，处理器1001根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零。其中，所述上行干扰门限为预先设置的。
具体的，所述预先设置的上行干扰门限为多个，每个上行干扰门限对应不同的有用信号或参考信号接收功率等级；在所述根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置之前，处理器1001还根据有用信号或参考信号接收功率确定所述有用信号或参考信号接收功率所属的等级；根据所述有用信号或参考信号接收功率所属的等级确定对应的上行干扰门限。
可选的，在所述根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置之前，处理器1001还确定上行干扰门限，所述确定上行干扰门限的步骤包括：
根据检测到的上行信道所有PRB的上行干扰，确定候选上行干扰门限集合；
根据测量得到的底噪、每个PRB的上行干扰以及测量得到的每个RPB的PUSCH信号平均接收功率，确定每个PRB的信干噪比SINR值；
根据每个候选上行干扰门限确定对应的PRB集合，一个PRB集合中的PRB的上行干扰小于等于该PRB集合对应的候选上行干扰门限；
根据每个PRB的SINR值，确定每个PRB集合对应的时域检测SINR值；
将时域检测SINR值最大的PRB集合所对应的候选上行干扰门限，确定为上行干扰门限。
在上述确定上行干扰门限的步骤中，处理器1001根据公式(10)确定每个PRB集合对应的时域检测SINR值，记为SINR1。其中，若频域均衡使用的是迫零ZF均衡，则根据 公式(11)或公式(12)确定所述每个PRB集合对应的时域检测SINR值，所述公式(11)或公式(12)是将ZF均衡时的均衡系数wi代入所述公式(10)后得到的；或者，若频域均衡使用的是最小均方差MMSE均衡，则根据公式(13)或或公式(14)确定所述每个PRB集合对应的时域检测SINR值，所述公式(13)或公式(14)是将MMSE均衡时的均衡系数wi代入所述公式(10)后得到的。
在将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零之后，处理器1001对置零后的接收信号进行频域均衡和离散傅里叶反变换IDFT；将经过IDFT后的接收信号进行幅度补偿。
当对终端进行噪声和/或CQI测量时，处理器1001使用不在所述频域位置上的探测参考信号进行测量。
上述过程中，所述进行置零的接收信号不包括用于进行干扰测量的参考信号。所述强干扰所在的频域位置是指：强干扰所在的子载波或PRB。
存储器1003，用于存储一个或多个可执行程序，被用于配置所述处理器1001。
基于相同的发明构思，图11为本申请实施例提供的另一种上行资源分配装置的结构示意图，该装置可实现本申请上述实施例提供的频选调度方案的上行资源分配方法。该装置可包括：任意数量的互联的总线和桥，具体由处理器1101代表的一个或多个处理器和存储器1103代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口，收发机1102可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器1101负责管理总线架构和通常的处理，存储器1103可以存储处理器1101在执行操作时所使用的数据。
处理器1101，用于读取存储器1103中的程序，执行下列过程：收发机1102获取检测到的上行干扰，处理器1101根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源；将确定出的容量最大的传输资源分配给终端进行上行传输。
具体的，处理器1101遍历所有可用的PRB组合，得到候选PRB集合，每个候选PRB集合内的PRB为多个连续可用的PRB；根据每个候选PRB集合中的PRB上的上行干扰，确定每个候选PRB集合对应的信道容量；将所述候选PRB集合中具有最大信道容量的PRB集合，确定为容量最大的传输资源。
收发机1102获取N个上行干扰门限，N为大于或等于1的整数，并针对每个上行干扰门限处理器1101执行：从可用PRB中选择上行干扰低于当前上行干扰门限的至少1个PRB集合；根据PRB上的上行干扰，确定所述至少1个PRB集合中每个集合对应的信道 容量；将所述至少1个PRB集合中具有最大信道容量的PRB集合，确定为当前上行干扰门限对应的信道容量；选取所述N个上行干扰门限中具有最大信道容量的上行干扰门限，将选取的上行干扰门限所对应的PRB集合确定为容量最大的传输资源。
上述确定上行干扰门限的步骤包括：收发机1102获取预先设置的上行干扰门限；
或者，所述确定上行干扰门限的步骤包括：
处理器1101根据检测到的上行信道的所有PRB的上行干扰，确定上行干扰门限的选择范围，所述选择范围的下限为检测到的最小的上行干扰，所述选择范围的上限为检测到的最大的上行干扰；根据设定的上行干扰门限的数量，在所述上行干扰门限的选择范围内确定相应数量的上行干扰门限。
收发机1102获取预先设置的上行干扰门限；处理器1101从可用PRB中选择上行干扰低于所述上行干扰门限的PRB，根据选择出的PRB确定候选PRB集合，每个PRB集合中包含至少一个连续的PRB；将具有最大PRB数量的候选PRB集合，确定为容量最大的传输资源。
当对终端进行噪声和/或CQI测量时，处理器1101使用选择出的PRB集合位置上的探测参考信号SRS进行测量。
存储器1103，用于存储一个或多个可执行程序，被用于配置所述处理器1101。
基于相同的发明构思，图12为本申请实施例提供的另一种信号处理装置的结构示意图，该装置可实现本申请上述实施例提供的自适应方案的信号处理方法。该装置可包括：任意数量的互联的总线和桥，具体由处理器1201代表的一个或多个处理器和存储器1203代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口，收发机1202可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器1201负责管理总线架构和通常的处理，存储器1203可以存储处理器1201在执行操作时所使用的数据。
处理器1201，用于读取存储器1203中的程序，执行下列过程：处理器1201确定需要采用的上行共享信道抗干扰方案，所述上行共享信道抗干扰方案包括干扰置零方案和频选调度方案；若确定采用干扰置零方案，则使用干扰置零方案对接收信号进行处理，若确定采用频选调度方案，则使用频选调度方案进行上行链路资源分配。
具体的，所述干扰置零方案包括：收发机1202获取时域到频域变换后的接收信号；处理器1201根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；根据确定出的强 干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零。所述频选调度方案包括：收发机1202获取检测到的上行干扰；处理器1201根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源；将确定出的容量最大的传输资源分配给终端进行上行传输。
收发机1202获取上行共享信道抗干扰方案配置信息，所述配置信息指示采用干扰置零方案或频选调度方案，若所述配置信息指示采用干扰置零方案，则处理器1201确定采用所述干扰置零方案对接收信号进行处理；若所述配置信息指示采用频选调度方案，则处理器1201确定采用所述频选调度方案进行上行资源分配。其中，指示采用干扰置零方案的配置信息在以下情况下被发送：终端数量小于第一门限值且上行干扰高于上行干扰门限的子载波数量小于第二门限值，或者上行干扰高于上行干扰门限的子载波分布分散；指示采用频选调度方案的配置信息在以下情况下发送：终端数量大于等于所述第三门限值，或者上行链路最大可用的连续PRB的数量大于等于第四门限值，或者上行链路最大可用的连续PRB数量与可分配给该用户的PRB总数量的比值大于等于第五门限值，其中，所述可用的PRB是指干扰小于门限的PRB。
处理器1201确定第一信道容量和第二信道容量，所述第一信道容量根据公式(24)确定，所述第二信道容量根据公式(22)确定；若所述第二信道容量大于所述第一信道容量，则确定使用所述频选调度方案进行上行资源分配，否则确定使用所述干扰置零方案对接收信号进行处理。所述公式(24)中SINR1由公式(10)确定，所述公式(22)中SINR2由公式(23)确定。
存储器1203，用于存储一个或多个可执行程序，被用于配置所述处理器1201。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (44)

  1. 一种信号处理方法，其特征在于，包括：
    获取时域到频域变换后的接收信号；
    根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；
    根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零。
  2. 如权利要求1所述的方法，其特征在于，所述上行干扰门限为预先设置的。
  3. 如权利要求2所述的方法，其特征在于，所述预先设置的上行干扰门限为多个，每个上行干扰门限对应不同的有用信号或参考信号接收功率等级；
    所述根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置之前，还包括：
    根据有用信号或参考信号接收功率确定所述有用信号或参考信号接收功率所属的等级；
    根据所述有用信号或参考信号接收功率所属的等级确定对应的上行干扰门限。
  4. 如权利要求1所述的方法，其特征在于，所述根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置之前，还包括确定上行干扰门限的步骤，所述确定上行干扰门限的步骤包括：
    根据检测到的上行信道所有物理资源块PRB的上行干扰，确定候选上行干扰门限集合；
    根据测量得到的底噪、每个PRB的上行干扰以及测量得到的每个RPB的上行共享信道PUSCH信号平均接收功率，确定每个PRB的信干噪比SINR值；
    根据每个候选上行干扰门限确定对应的PRB集合，一个PRB集合中的PRB的上行干扰小于等于该PRB集合对应的候选上行干扰门限；
    根据每个PRB的SINR值，确定每个PRB集合对应的时域检测SINR值；
    将时域检测SINR值最大的PRB集合所对应的候选上行干扰门限，确定为上行干扰门限。
  5. 如权利要求4所述的方法，其特征在于，所述根据每个PRB的SINR值，确定每个PRB集合对应的时域检测SINR值，包括：
    根据下述第一公式确定每个PRB集合对应的时域检测SINR值，记为SINR1：
    Figure PCTCN2016075868-appb-100001
    其中，SINR1为时域检测SINR值，M为终端占用的所有子载波的数量，所述所有子载波中包括置零子载波，Ω为置零子载波的编号集合，wi为第i个子载波的均衡系数，Hi为第i个子载波的信道估计值，
    Figure PCTCN2016075868-appb-100002
    为发送端数据符号平均功率，
    Figure PCTCN2016075868-appb-100003
    为Hi的共轭，
    Figure PCTCN2016075868-appb-100004
    为第i个子载波上的底噪和干扰功率之和。
  6. 如权利要求5所述的方法，其特征在于，若频域均衡使用的是迫零ZF均衡，则根据第二公式或第三公式确定所述每个PRB集合对应的时域检测SINR值，所述第二公式或第三公式是将迫零ZF均衡时的均衡系数wi代入所述第一公式后得到的；或者，若频域均衡使用的是最小均方差MMSE均衡，则根据第四公式或第五公式确定所述每个PRB集合对应的时域检测SINR值，所述第四公式或第五公式是将MMSE均衡时的均衡系数wi代入所述第一公式后得到的；
    所述第二公式为：
    Figure PCTCN2016075868-appb-100005
    其中，SNIRZF,1为时域ZF检测后的SINR值，M为终端占用的子载波的数量，Ω为置零子载波的编号集合，SINRk为第k个子载波的信干噪比，x为置零比率，
    Figure PCTCN2016075868-appb-100006
    其中，NRB为终端占用的PRB的数量，NΩ为置零子载波集合Ω中的PRB的数量；
    所述第三公式为：
    Figure PCTCN2016075868-appb-100007
    其中，SNIRZF,1为时域ZF检测后的SINR值，NRB为终端占用的PRB的数量，ΩPRB为 置零PRB的编号集合，SINRPRB,k为第k个PRB的平均SINR值，x为置零比率，
    Figure PCTCN2016075868-appb-100008
    其中，
    Figure PCTCN2016075868-appb-100009
    为置零PRB集合ΩPRB中的PRB的数量；
    所述第四公式为：
    Figure PCTCN2016075868-appb-100010
    其中，SNIRMMSE,1为时域MMSE检测SINR值，M为终端占用的子载波的数量，Ω为置零子载波的编号集合，SINRk为第k个子载波的信干噪比；
    所述第五公式为：
    Figure PCTCN2016075868-appb-100011
    其中，SNIRMMSE,1为时域MMSE检测SINR值，NRB为终端占用的PRB的数量，ΩPRB为置零PRB的编号集合，SINRPRB,k为第k个PRB的平均SINR值。
  7. 如权利要求1所述的方法，其特征在于，所述进行置零的接收信号不包括用于进行干扰测量的参考信号。
  8. 如权利要求1所述的方法，其特征在于，所述将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零之后，还包括：
    对置零后的接收信号进行频域均衡和离散傅里叶反变换IDFT；
    将经过IDFT后的接收信号进行幅度补偿。
  9. 如权利要求1所述的方法，其特征在于，还包括：
    当对终端进行噪声和/或信道质量指示符CQI测量时，使用不在所述频域位置上的探测参考信号进行测量。
  10. 如权利要求1至9中任一项所述的方法，其特征在于，所述强干扰所在的频域位置是指：强干扰所在的子载波或PRB。
  11. 一种上行资源分配方法，其特征在于，所述方法包括：
    获取检测到的上行干扰；
    根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源；
    将确定出的容量最大的传输资源分配给终端进行上行传输。
  12. 如权利要求11所述的方法，其特征在于，所述根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源，包括：
    遍历所有可用的物理资源块PRB组合，得到候选PRB集合，每个候选PRB集合内的PRB为多个连续可用的PRB；
    根据每个候选PRB集合中的PRB上的上行干扰和有用信号接收功率，确定每个候选PRB集合对应的信道容量；
    将所述候选PRB集合中具有最大信道容量的PRB集合，确定为容量最大的传输资源。
  13. 如权利要求11所述的方法，其特征在于，所述根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源，包括：
    获取N个上行干扰门限，N为大于或等于1的整数，并针对每个上行干扰门限执行：
    从可用PRB中选择上行干扰低于当前上行干扰门限的所有PRB集合；
    根据PRB上的上行干扰和有用信号接收功率，确定所述所有PRB集合中每个集合对应的信道容量；
    将所述所有PRB集合中具有最大信道容量的PRB集合，确定为当前上行干扰门限对应的信道容量；
    选取所述N个上行干扰门限中具有最大信道容量的上行干扰门限，将选取的上行干扰门限所对应的PRB集合确定为容量最大的传输资源。
  14. 如权利要求13所述的方法，其特征在于，所述确定上行干扰门限的步骤包括：
    获取预先设置的上行干扰门限；
    或者，所述确定上行干扰门限的步骤包括：
    根据检测到的上行信道的所有PRB的上行干扰，确定上行干扰门限的选择范围，所述选择范围的下限为检测到的最小的上行干扰，所述选择范围的上限为检测到的最大的上行干扰；
    根据设定的上行干扰门限的数量，在所述上行干扰门限的选择范围内确定相应数量的上行干扰门限。
  15. 如权利要求11所述的方法，其特征在于，所述根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源，包括：
    获取预先设置的上行干扰门限；
    从可用PRB中选择上行干扰低于所述上行干扰门限的PRB，根据选择出的PRB确定候选PRB集合，每个PRB集合中包含至少一个连续的PRB；
    将具有最大PRB数量的候选PRB集合，确定为容量最大的传输资源。
  16. 如权利要求11所述的方法，其特征在于，所述方法还包括：
    当对终端进行噪声和/或信道质量指示符CQI测量时，使用所述选择出的PRB集合位置上的探测参考信号SRS进行测量。
  17. 一种信号处理方法，其特征在于，所述方法包括：
    确定需要采用的上行共享信道抗干扰方案，所述上行共享信道抗干扰方案包括干扰置零方案和频选调度方案；
    若确定采用干扰置零方案，则使用干扰置零方案对接收信号进行处理，若确定采用频选调度方案，则使用频选调度方案进行上行链路资源分配；
    所述干扰置零方案包括：
    获取时域到频域变换后的接收信号；
    根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；
    根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零；
    所述频选调度方案包括：
    获取检测到的上行干扰；
    根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源；
    将确定出的容量最大的传输资源分配给终端进行上行传输。
  18. 如权利要求17所述的方法，其特征在于，所述确定需要采用的上行共享信道抗干扰方案，包括：
    获取上行共享信道抗干扰方案配置信息，所述配置信息指示采用干扰置零方案或频选调度方案；
    若所述配置信息指示采用干扰置零方案，则确定采用所述干扰置零方案对接收信号进行处理；若所述配置信息指示采用频选调度方案，则确定采用所述频选调度方案进行上行资源分配。
  19. 如权利要求18所述的方法，其特征在于，指示采用干扰置零方案的配置信息在以下情况下被发送：
    终端数量小于第一门限值且上行干扰高于上行干扰门限的子载波数量小于第二门限值，或者上行干扰高于上行干扰门限的子载波分布分散；
    指示采用频选调度方案的配置信息在以下情况下发送：
    终端数量大于等于所述第三门限值，或者上行链路最大可用的连续PRB的数量大于等于第四门限值，或者上行链路最大可用的连续PRB数量与可分配给该用户的PRB总数量的比值大于等于第五门限值，其中，所述可用的PRB是指干扰小于门限的PRB。
  20. 如权利要求17所述的方法，其特征在于，所述确定需要采用的上行共享信道抗干扰方案，包括：
    确定第一信道容量和第二信道容量，所述第一信道容量根据第六公式确定，所述第二信道容量根据第七公式确定；
    若所述第二信道容量大于所述第一信道容量，则确定使用所述频选调度方案进行上行资源分配，否则确定使用所述干扰置零方案对接收信号进行处理；
    所述第六公式为：
    C1＝B*log2(1+SINR1)
    其中，C1为第一信道容量，B为干扰置零时用户所占总带宽，所述用户所占总带宽中包括置零子载波，SINR1为干扰置零时的时域检测信干噪比；
    所述第七公式为：
    C2＝yB*log2(1+SINR2)
    其中，C2为第二信道容量，y为频选调度时用户实际占用带宽与用户可用总带宽的比例，B为用户可用总带宽，SINR2为频选调度所选用PRB集合的时域检测信干噪比。
  21. 如权利要求20所述的方法，其特征在于，所述SINR1由第八公式确定；
    所述第八公式为：
    Figure PCTCN2016075868-appb-100012
    其中，M为终端占用的所有子载波的数量，所述所有子载波中包括置零子载波，Ω为置零子载波的编号集合，wi为第i个子载波的均衡系数，Hi为第i个子载波的信道估计值，
    Figure PCTCN2016075868-appb-100013
    为发送端数据符号平均功率，
    Figure PCTCN2016075868-appb-100014
    为Hi的共轭，
    Figure PCTCN2016075868-appb-100015
    为第i个子载波上的底噪和干扰功率 之和。
  22. 如权利要求20所述的方法，其特征在于，所述SINR2由第九公式确定；
    所述第九公式为：
    Figure PCTCN2016075868-appb-100016
    其中Ωs为频选调度时用户实际占用的子载波集合，
    Figure PCTCN2016075868-appb-100017
    为集合Ωs中元素的数量，wi为第i个子载波的均衡系数，Hi为第i个子载波的信道估计值，
    Figure PCTCN2016075868-appb-100018
    为发送端数据符号平均功率，
    Figure PCTCN2016075868-appb-100019
    为Hi的共轭，
    Figure PCTCN2016075868-appb-100020
    为第i个子载波上的底噪和干扰功率之和。
  23. 一种信号处理装置，其特征在于，包括：
    获取单元，用于获取时域到频域变换后的接收信号；
    频域位置确定单元，用于根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；
    置零单元，用于根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零。
  24. 如权利要求23所述的装置，其特征在于，所述上行干扰门限为预先设置的。
  25. 如权利要求24所述的装置，其特征在于，所述预先设置的上行干扰门限为多个，每个上行干扰门限对应不同的有用信号或参考信号接收功率等级；
    所述根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置之前，所述频域位置确定单元还用于：
    根据有用信号或参考信号接收功率确定所述有用信号或参考信号接收功率所属的等级；
    根据所述有用信号或参考信号接收功率所属的等级确定对应的上行干扰门限。
  26. 如权利要求23所述的装置，其特征在于，所述根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置之前，所述频域位置确定单元还用于：
    确定上行干扰门限，所述确定上行干扰门限的步骤包括：
    根据检测到的上行信道所有物理资源块PRB的上行干扰，确定候选上行干扰门限集合；
    根据测量得到的底噪、每个PRB的上行干扰以及测量得到的每个RPB的上行共享信 道PUSCH信号平均接收功率，确定每个PRB的信干噪比SINR值；
    根据每个候选上行干扰门限确定对应的PRB集合，一个PRB集合中的PRB的上行干扰小于等于该PRB集合对应的候选上行干扰门限；
    根据每个PRB的SINR值，确定每个PRB集合对应的时域检测SINR值；
    将时域检测SINR值最大的PRB集合所对应的候选上行干扰门限，确定为上行干扰门限。
  27. 如权利要求26所述的装置，其特征在于，所述频域位置确定单元具体用于：
    根据下述第一公式确定每个PRB集合对应的时域检测SINR值，记为SINR1：
    Figure PCTCN2016075868-appb-100021
    其中，SINR1为时域检测SINR值，M为终端占用的所有子载波的数量，所述所有子载波中包括置零子载波，Ω为置零子载波的编号集合，wi为第i个子载波的均衡系数，Hi为第i个子载波的信道估计值，
    Figure PCTCN2016075868-appb-100022
    为发送端数据符号平均功率，
    Figure PCTCN2016075868-appb-100023
    为Hi的共轭，
    Figure PCTCN2016075868-appb-100024
    为第i个子载波上的底噪和干扰功率之和。
  28. 如权利要求27所述的装置，其特征在于，所述频域位置确定单元具体用于：
    若频域均衡使用的是迫零ZF均衡，则根据第二公式或第三公式确定所述每个PRB集合对应的时域检测SINR值，所述第二公式或第三公式是将ZF均衡时的均衡系数wi代入所述第一公式后得到的；或者，若频域均衡使用的是最小均方差MMSE均衡，则根据第四公式确定所述每个PRB集合对应的时域检测SINR值，所述第四公式或第五公式是将MMSE均衡时的均衡系数wi代入所述第一公式后得到的；
    所述第二公式为：
    Figure PCTCN2016075868-appb-100025
    其中，SNIRZF,1为时域ZF检测后的SINR值，M为终端占用的子载波的数量，Ω为置 零子载波的编号集合，SINRk为第k个子载波的信干噪比，x为置零比率，
    Figure PCTCN2016075868-appb-100026
    其中，NRB为终端占用的PRB的数量，NΩ为置零PRB集合Ω中的PRB的数量；
    所述第三公式为：
    Figure PCTCN2016075868-appb-100027
    其中，SNIRZF,1为时域ZF检测后的SINR值，NRB为终端占用的PRB的数量，ΩPRB为置零的PRB集合，SINRPRB,k为第k个PRB的平均SINR值，x为置零比率，
    Figure PCTCN2016075868-appb-100028
    其中，
    Figure PCTCN2016075868-appb-100029
    为置零PRB集合ΩPRB中的PRB的数量；
    所述第四公式为：
    Figure PCTCN2016075868-appb-100030
    其中，SNIRMMSE,1为时域MMSE检测SINR值，M为终端占用的子载波的数量，Ω为置零子载波的编号集合，SINRk为第k个子载波的信干噪比；
    所述第五公式为：
    Figure PCTCN2016075868-appb-100031
    其中，SNIRMMSE,1为时域MMSE检测SINR值，NRB为终端占用的PRB的数量，ΩPRB为置零的PRB集合，SINRPRB,k为第k个PRB的平均SINR值。
  29. 如权利要求23所述的装置，其特征在于，所述进行置零的接收信号不包括用于 进行干扰测量的参考信号。
  30. 如权利要求23所述的装置，其特征在于，所述将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零之后，所述置零单元还用于：
    对置零后的接收信号进行频域均衡和离散傅里叶反变换IDFT；
    将经过IDFT后的接收信号进行幅度补偿。
  31. 如权利要求23所述的装置，其特征在于，还包括：测量单元，具体用于当对终端进行噪声和/或信道质量指示符CQI测量时，使用不在所述频域位置上的探测参考信号进行测量。
  32. 如权利要求23至31中任一项所述的装置，其特征在于，所述强干扰所在的频域位置是指：强干扰所在的子载波或PRB。
  33. 一种上行资源分配装置，其特征在于，所述方法包括：
    获取单元，用于获取检测到的上行干扰；
    传输资源确定单元，用于根据检测到的上行干扰和带宽，从可用的传输资源中确定容量最大的传输资源；
    资源调度单元，用于将确定出的容量最大的传输资源分配给终端进行上行传输。
  34. 如权利要求33所述的装置，其特征在于，所述传输资源确定单元具体用于：
    遍历所有可用的物理资源块PRB组合，得到候选PRB集合，每个候选PRB集合内的PRB为多个连续可用的PRB；
    根据每个候选PRB集合中的PRB上的上行干扰，确定每个候选PRB集合对应的信道容量；
    将所述候选PRB集合中具有最大信道容量的PRB集合，确定为容量最大的传输资源。
  35. 如权利要求33所述的装置，其特征在于，所述传输资源确定单元具体用于：
    获取N个上行干扰门限，N为大于或等于1的整数，并针对每个上行干扰门限执行：
    从可用PRB中选择上行干扰低于当前上行干扰门限的至少1个PRB集合；
    根据PRB上的上行干扰，确定所述至少1个PRB集合中每个集合对应的信道容量；
    将所述至少1个PRB集合中具有最大信道容量的PRB集合，确定为当前上行干扰门限对应的信道容量；
    选取所述N个上行干扰门限中具有最大信道容量的上行干扰门限，将选取的上行干扰门限所对应的PRB集合确定为容量最大的传输资源。
  36. 如权利要求35所述的装置，其特征在于，所述确定上行干扰门限的步骤包括：
    获取预先设置的上行干扰门限；
    或者，所述确定上行干扰门限的步骤包括：
    根据检测到的上行信道的所有PRB的上行干扰，确定上行干扰门限的选择范围，所述选择范围的下限为检测到的最小的上行干扰，所述选择范围的上限为检测到的最大的上行干扰；
    根据设定的上行干扰门限的数量，在所述上行干扰门限的选择范围内确定相应数量的上行干扰门限。
  37. 如权利要求33所述的装置，其特征在于，所述传输资源确定单元具体用于：
    获取预先设置的上行干扰门限；
    从可用PRB中选择上行干扰低于所述上行干扰门限的PRB，根据选择出的PRB确定候选PRB集合，每个PRB集合中包含至少一个连续的PRB；
    将具有最大PRB数量的候选PRB集合，确定为容量最大的传输资源。
  38. 如权利要求33所述的装置，其特征在于，还包括：测量单元，具体用于当对终端进行噪声和/或信道质量指示符CQI测量时，使用选择出的PRB集合位置上的探测参考信号SRS进行测量。
  39. 一种信号处理装置，其特征在于，所述方法包括：
    方案确定单元，用于确定需要采用的上行共享信道抗干扰方案，所述上行共享信道抗干扰方案包括干扰置零方案和频选调度方案；
    处理单元，用于若确定采用干扰置零方案，则使用干扰置零方案对接收信号进行处理，若确定采用频选调度方案，则使用频选调度方案进行上行链路资源分配；所述干扰置零方案包括：获取时域到频域变换后的接收信号；根据检测到的上行干扰确定所述时域到频域变换后的接收信号中强干扰所在的频域位置，所述频域位置上的接收信号的上行干扰高于上行干扰门限；根据确定出的强干扰所在的频域位置，将所述时域到频域变换后的接收信号中相应频域位置上的信号进行置零；所述频选调度方案包括：获取检测到的上行干扰和带宽；根据检测到的上行干扰，从可用的传输资源中确定容量最大的传输资源；将确定出的容量最大的传输资源分配给终端进行上行传输。
  40. 如权利要求39所述的装置，其特征在于，所述方案确定单元具体用于：
    获取上行共享信道抗干扰方案配置信息，所述配置信息指示采用干扰置零方案或频选调度方案；
    若所述配置信息指示采用干扰置零方案，则确定采用所述干扰置零方案对接收信号进行处理；若所述配置信息指示采用频选调度方案，则确定采用所述频选调度方案进行上行资源分配。
  41. 如权利要求40所述的装置，其特征在于，指示采用干扰置零方案的配置信息在以下情况下被发送：
    终端数量小于第一门限值且上行干扰高于上行干扰门限的子载波数量小于第二门限值，或者上行干扰高于上行干扰门限的子载波分布分散；
    指示采用频选调度方案的配置信息在以下情况下发送：
    终端数量大于等于所述第三门限值，或者上行链路最大可用的连续PRB的数量大于等于第四门限值，或者上行链路最大可用的连续PRB数量与可分配给该用户的PRB总数量的比值大于等于第五门限值，其中，所述可用的PRB是指干扰小于门限的PRB。
  42. 如权利要求39所述的装置，其特征在于，所述方案确定单元具体用于
    确定第一信道容量和第二信道容量，所述第一信道容量根据第六公式确定，所述第二信道容量根据第七公式确定；
    若所述第二信道容量大于所述第一信道容量，则确定使用所述频选调度方案进行上行资源分配，否则确定使用所述干扰置零方案对接收信号进行处理；
    所述第六公式为：
    C1＝B*log2(1+SINR1)
    其中，C1为第一信道容量，B为干扰置零时用户所占总带宽，所述用户所占总带宽中包括置零子载波，SINR1为干扰置零时的时域检测信干噪比；
    所述第七公式为：
    C2＝yB*log2(1+SINR2)
    其中，C2为第二信道容量，y为频选调度时用户实际占用带宽与用户可用总带宽的比例，B为用户可用总带宽，SINR2为频选调度所选用PRB集合的时域检测信干噪比。
  43. 如权利要求42所述的装置，其特征在于，所述SINR1由第八公式确定；
    所述第八公式为：
    Figure PCTCN2016075868-appb-100032
    其中，M为终端占用的所有子载波的数量，所述所有子载波中包括置零子载波，Ω为置零子载波的编号集合，wi为第i个子载波的均衡系数，Hi为第i个子载波的信道估计值，
    Figure PCTCN2016075868-appb-100033
    为发送端数据符号平均功率，
    Figure PCTCN2016075868-appb-100034
    为Hi的共轭，
    Figure PCTCN2016075868-appb-100035
    为第i个子载波上的底噪和干扰功率之和。
  44. 如权利要求42所述的装置，其特征在于，所述SINR2由第九公式确定；
    所述第九公式为：
    Figure PCTCN2016075868-appb-100036
    其中Ωs为频选调度时用户实际占用的子载波集合，
    Figure PCTCN2016075868-appb-100037
    为集合Ωs中元素的数量，wi为第i个子载波的均衡系数，Hi为第i个子载波的信道估计值，
    Figure PCTCN2016075868-appb-100038
    为发送端数据符号平均功率，
    Figure PCTCN2016075868-appb-100039
    为Hi的共轭，
    Figure PCTCN2016075868-appb-100040
    为第i个子载波上的底噪和干扰功率之和。
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