Signal preprocessing method and apparatus, communication device, and storage medium

Abstract

Disclosed in embodiments of the present disclosure are a signal preprocessing method and apparatus, a communication device, and a storage medium. The method comprises: a network device receives first information and a first reference signal which are sent by a terminal, the first information being used for instructing or notifying the network device to perform inter carrier interference (ICI) preprocessing; the network device predicts ICI on the basis of the first information and the first reference signal to obtain an ICI prediction result; and the network device preprocesses a signal on the basis of the ICI prediction result.

Description

A signal preprocessing method and device, a communication device, and a storage medium

[0001] Cross-reference to related applications

[0002] The present disclosure is based on and claims priority from Chinese Patent Application No. 202410994370.5, filed on July 23, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the field of communication technology, and particularly relates to a signal preprocessing method and device, a communication device, and a storage medium. BACKGROUND

[0004] In order to transmit more data streams, a future multiple input multiple output (MIMO) system may need to quickly change antenna characteristics within a symbol period to achieve expansion of a transmission channel and to multiply spectral efficiency.

[0005] In this new MIMO mode, the receiving end can sample a time domain signal by using quickly variable antenna characteristics within a symbol period, and map time domain sampling points to virtual receiving channels corresponding to the antenna characteristics. Since a spatial channel is approximately constant within an orthogonal frequency division multiplexing (OFDM) symbol period, the receiving end can expand additional receiving channels on the basis of original physical channels in this way. However, due to the limitation of actual device switching speed, the receiving end may lose part of the sampling point information in the antenna characteristic switching process, causing inter carrier interference (ICI), and affecting the detection performance of the receiver. SUMMARY

[0006] The present disclosure provides a signal preprocessing method and device, a communication device, and a storage medium.

[0007] The technical solution of the present disclosure embodiment is implemented as follows:

[0008] In a first aspect, the embodiments of the present disclosure provide a signal preprocessing method, which is applied to a network device, and the method comprises the following steps: the network device receives first information and a first reference signal sent by a terminal, the first information is used to instruct or inform the network device to perform ICI preprocessing, and the first information comprises antenna characteristic indication information; the network device performs ICI prediction based on the first information and the first reference signal to obtain an ICI prediction result; and the network device performs signal preprocessing based on the ICI prediction result.

[0009] In some optional embodiments of the present disclosure, before the network device receives the first reference signal sent by the terminal, the method further comprises the following step: the network device sends second information to the terminal, the second information comprises resource configuration information of the first reference signal, and the resource configuration information of the first reference signal is determined by the network device according to the antenna characteristic indication information in the first information.

[0010] In some optional embodiments of the present disclosure, the antenna characteristic indication information comprises the number of antenna characteristics and the number of sampling points occupied by each antenna characteristic continuously; the network device receives the first information sent by the terminal, comprising: the network device receives uplink control information sent by the terminal, the uplink control information comprises a first field and a second field, the first field is used to carry the number of antenna characteristics, and the second field is used to carry the number of sampling points occupied by each antenna characteristic continuously.

[0011] In some optional embodiments of the present disclosure, the network device performs ICI prediction based on the first information and the first reference signal to obtain an ICI prediction result, comprising: the network device measures the first reference signal sent by the terminal through different antenna characteristics to obtain a measurement result; and the network device performs ICI prediction based on the measurement result and the antenna characteristic indication information to obtain an ICI prediction result.

[0012] In some optional embodiments of the present disclosure, the network device performs ICI prediction based on the measurement result and the antenna characteristic indication information to obtain an ICI prediction result, comprising: the network device obtains a first frequency domain channel matrix corresponding to each antenna characteristic based on the measurement result of each first reference signal, and performs transformation processing on each first frequency domain channel matrix to obtain a corresponding first time domain channel matrix; the network device combines the first time domain channel matrix corresponding to each antenna characteristic according to the antenna characteristic indication information to obtain a second time domain channel matrix; and the network device performs Fourier transformation processing on the second time domain channel matrix to obtain an equivalent channel matrix and an ICI matrix.

[0013] In some optional embodiments of the present disclosure, the network device performs preprocessing on a signal based on the ICI prediction result, including: the network device processes a second reference signal based on the ICI prediction result, and transmits the processed second reference signal; the network device receives channel state information transmitted by the terminal, and performs preprocessing on a signal based on the channel state information; wherein the channel state information is obtained by the terminal measuring the processed second reference signal.

[0014] In some optional embodiments of the present disclosure, the ICI prediction result includes an ICI matrix; and the network device processes a second reference signal based on the ICI prediction result, including: the network device obtains a first preprocessing matrix based on the ICI matrix, and processes the second reference signal based on the first preprocessing matrix.

[0015] In some optional embodiments of the present disclosure, the preprocessing on a signal based on the channel state information includes: the network device determines a second preprocessing matrix based on the channel state information, and pre-processes a signal based on the first preprocessing matrix and the second preprocessing matrix.

[0016] In the second aspect, the embodiments of the present disclosure further provide a signal preprocessing method, which is applied to a terminal, and includes: the terminal determines whether ICI exists in downlink reception according to supported antenna characteristics and an oversampling multiple; when the terminal determines that ICI exists in downlink reception, the terminal transmits first information to a network device, and transmits first reference signals to the network device through different antenna characteristics, the first information is used to instruct or inform the network device to perform ICI preprocessing, and the first information includes antenna characteristic indication information; the first information and the first reference signals are used for the network device to perform ICI prediction to obtain an ICI prediction result used for preprocessing on a signal.

[0017] In some optional embodiments of the present disclosure, before the transmitting of the first reference signals to the network device through different antenna characteristics, the method further includes: the terminal receives second information transmitted by the network device, the second information includes resource configuration information of the first reference signals, and the resource configuration information of the first reference signals is determined by the network device according to the antenna characteristic indication information in the first information.

[0018] In some optional embodiments of the present disclosure, the transmitting of the first reference signals to the network device through different antenna characteristics includes: the terminal transmits the first reference signals to the network device through different antenna characteristics according to the resource configuration information, and each first reference signal lasts for one symbol period.

[0019] In some optional embodiments of the present disclosure, the antenna characteristic indication information comprises an antenna characteristic quantity and a number of sampling points occupied by each antenna characteristic successively; and the sending of the first information to the network device comprises: the terminal sending uplink control information to the network device, the uplink control information comprising a first field and a second field, the first field being used to carry the antenna characteristic quantity, and the second field being used to carry the number of sampling points occupied by each antenna characteristic successively.

[0020] In some optional embodiments of the present disclosure, the antenna characteristic indication information comprises an antenna characteristic quantity and a number of sampling points occupied by each antenna characteristic successively; and the determining of whether ICI exists in downlink reception according to the supported antenna characteristic and the oversampling multiple comprises: the terminal determining a total number of sampling points of all antenna characteristics according to the antenna characteristic quantity and the number of sampling points occupied by each antenna characteristic successively; determining that no ICI exists in downlink reception when the total number of sampling points is less than or equal to the oversampling multiple; and determining that ICI exists in downlink reception when the total number of sampling points is greater than the oversampling multiple.

[0021] In some optional embodiments of the present disclosure, the method further comprises: the terminal receiving a second reference signal sent by the network device, the second reference signal being a reference signal processed by the network device based on the ICI prediction result; the terminal measuring the second reference signal to obtain channel state information, and sending the channel state information to the network device.

[0022] In a third aspect, the embodiments of the present disclosure further provide a signal preprocessing apparatus, the apparatus being applied to a network device, the apparatus comprising a first communication unit and a first processing unit; wherein,

[0023] The first communication unit is configured to receive first information and a first reference signal sent by a terminal, the first information being used to instruct or inform the network device to perform ICI preprocessing, and the first information comprising antenna characteristic indication information.

[0024] The first processing unit is configured to predict ICI based on the first information and the first reference signal to obtain an ICI prediction result, and to perform preprocessing on a signal based on the ICI prediction result.

[0025] In a fourth aspect, the embodiments of the present disclosure further provide a signal preprocessing apparatus, the apparatus being applied to a terminal, the apparatus comprising a second processing unit and a second communication unit; wherein,

[0026] The second processing unit is configured to determine whether ICI exists in downlink reception according to a supported antenna characteristic and an oversampling multiple.

[0027] The second communication unit is configured to, when the second processing unit determines that there is ICI in downlink reception, send first information and first reference signals with different antenna characteristics to a network device, the first information being used to instruct or inform the network device to perform ICI preprocessing, and the first information including antenna characteristic indication information; and the first information and the first reference signals being used by the network device to predict ICI to obtain an ICI prediction result used for preprocessing of a signal.

[0028] In a fifth aspect, the embodiments of the present disclosure further provide a computer-readable storage medium, which stores a computer program, and the program is executed by a processor to implement the steps of the signal preprocessing method in the first aspect or the second aspect.

[0029] In a sixth aspect, the embodiments of the present disclosure further provide a communication device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the signal preprocessing method in the first aspect or the second aspect when executing the program.

[0030] In a seventh aspect, the embodiments of the present disclosure further provide a computer program product, which includes computer program instructions, and the computer program instructions enable a computer to execute the steps of the signal preprocessing method in the first aspect or the second aspect.

[0031] The signal preprocessing method, the apparatus, the communication device, and the storage medium provided by the embodiments of the present disclosure enable a terminal to determine whether there is ICI in downlink reception according to an antenna characteristic switching mode supported by the terminal and a sampling rate, and to inform a network device that ICI preprocessing is needed for a transmitted signal when it is determined that there is ICI in downlink reception; and the network device is enabled to predict ICI according to the antenna characteristic switching mode of the terminal and first reference signals transmitted by the terminal, and to preprocess a transmitted signal according to an ICI prediction result. The technical solution of the embodiments of the present disclosure can reduce the calculation complexity and overhead of ICI elimination by a terminal, and improve the transmission performance and practical value of a new MIMO system. BRIEF DESCRIPTION OF DRAWINGS

[0032] FIG. 1 is a schematic diagram of a multi-antenna precoding transmission model;

[0033] FIG. 2 is a schematic diagram of ICI interference;

[0034] FIG. 3 is a schematic diagram of DFT precoding;

[0035] FIG. 4 is a schematic diagram of ICI interference caused by antenna characteristic switching;

[0036] FIG. 5 is a flowchart of a signal preprocessing method according to an embodiment of the present disclosure;

[0037] FIG. 6 is a flowchart of a signal preprocessing method according to an embodiment of the present disclosure;

[0038] FIG. 7 is a schematic diagram of terminal downlink reception in a signal preprocessing method according to an embodiment of the present disclosure;

[0039] FIGS. 8a and 8b are schematic diagrams of the influence of terminal antenna characteristic switching on ICI in a signal preprocessing method according to an embodiment of the present disclosure;

[0040] FIG. 9 is a schematic diagram of base station ICI estimation in a signal preprocessing method according to an embodiment of the present disclosure;

[0041] FIG. 10 is a schematic diagram of ICI preprocessing principle in a signal preprocessing method according to an embodiment of the present disclosure;

[0042] FIG. 11 is an interaction flowchart of a signal preprocessing method according to an embodiment of the present disclosure;

[0043] FIG. 12 is a schematic diagram of the composition structure of a signal preprocessing apparatus according to an embodiment of the present disclosure;

[0044] FIG. 13 is a schematic diagram of the composition structure of a signal preprocessing apparatus according to an embodiment of the present disclosure;

[0045] FIG. 14 is a schematic diagram of the hardware composition structure of a communication device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] The present disclosure will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0047] The technical solutions of the embodiments of the present disclosure can be applied to various communication systems, such as a Global System of Mobile communication (GSM) system, a Long Term Evolution (LTE) system, or a 5G system, etc. Optionally, the 5G system or 5G network can also be referred to as a New Radio (NR) system or NR network.

[0048] For example, the communication system to which the embodiments of the present disclosure are applied can include a network device and a terminal device (also referred to as a terminal, a communication terminal, etc.); the network device can be a device that communicates with the terminal device. The network device can provide communication coverage for a certain area and can communicate with terminals located in the area. Optionally, the network device can be a base station in various communication systems, such as an Evolutional Node B (eNB) in an LTE system, or a base station (gNB) in a 5G system or an NR system.

[0049] It should be understood that the devices with communication function in the network / system in the embodiments of the present disclosure can be referred to as communication devices. The communication devices can include network devices and terminals with communication functions, and the network devices and terminal devices can be the specific devices described above, which will not be described here again; the communication devices can also include other devices in the communication system, such as network controllers, mobile management entities and other network entities, which are not limited in the embodiments of the present disclosure.

[0050] It should be understood that the terms “system” and “network” are often used interchangeably herein. The term “and / or” herein is only used to describe the association relationship of the associated objects. It means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character “ / ” generally represents an “or” relationship between the front and rear associated objects.

[0051] The terms “first”, “second”, and the like in the specification and claims of the present disclosure are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0052] Before the technical method of the embodiments of the present disclosure is described in detail, the related technologies involved in the embodiments of the present disclosure will be briefly described first.

[0053] MIMO communication system is an important enabling technology for future 6G, and the use of multiple antennas at the receiver / transmitter can bring many benefits to the mobile communication system:

[0054] ① Because the channels passed by different antennas are not completely correlated, the use of multiple antennas at the receiver / transmitter can obtain diversity gain to resist multipath fading;

[0055] ② By adjusting the phase and amplitude of the transmitting antenna units, the signal can have a specific directivity, that is, the transmission energy is concentrated in a specific direction or a specific position in space, which improves the energy obtained by the receiver and reduces interference;

[0056] ③ The receiving antenna units can also achieve directivity, focusing the signal reception in the direction corresponding to the signal, thereby reducing the interference signals from other directions;

[0057] ④ Realize space division multiplexing, transmit multiple layers of data streams in parallel on the same time-frequency resource.

[0058] Figure 1 shows a multi-antenna precoding transmission model, the sending end simultaneously transmits N L layers of independent vector signals x through layer mapping to antenna ports; each antenna port data is mapped to time-frequency resources through resource mapping; frequency domain signals are mapped to time domain through orthogonal frequency division multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) modulation. Beamforming can multiply different weights to time domain signals and map to physical antennas for transmission.

[0059] In OFDM signals, subcarriers are closely arranged in a mutually orthogonal manner, and the amplitude of other subcarriers is usually zero at the position of a certain subcarrier peak. When the orthogonality between subcarriers is lost, inter-carrier interference (ICI, Inter-Carrier Interference) will occur, which will deteriorate the transmission performance. As shown in Figure 2.

[0060] Generally, the causes of ICI include: ① The delay spread of the wireless channel exceeds the CP length (Guard Interval) of the OFDM signal; ② The frequency offset of the receiver. Accordingly, the ICI can be eliminated or suppressed by estimating the frequency offset through the pilot or adjusting the subcarrier spacing. The main technical means include: frequency domain equalization, time domain Nyquist windowing, ICI self-cancellation algorithm, etc.

[0061] When there is inter-cell / user interference, the actual signal-to-noise ratio of the signal will decrease, which will make the demodulation performance of the MIMO receiver worse. Using an interference rejection combining (IRC, Interference Rejection Combining) receiver can replace the white noise in the receiver algorithm with a covariance matrix composed of interference and noise, and obtain the effect of simultaneously suppressing interference and noise. Taking the minimum mean square error-interference rejection combining (MMSE-IRC, Minimum Mean Square Error-Interference Rejection Combining) receiver as an example, it can be mathematically expressed as: Wherein is the actual equivalent channel, represents the covariance matrix composed of noise and interference power.

[0062] Similarly, the uplink (such as a physical uplink control channel (PUCCH) / physical uplink shared channel (PUSCH)) in the NR can support discrete Fourier transform (DFT) precoding, which is used to reduce the cubic metric and improve the power amplifier efficiency. As shown in FIG. 3, the DFT precoding performs M-dimensional DFT on a data block with a length of M symbols, where M is the number of subcarriers. This way can effectively reduce the peak-to-average ratio of the signal, but due to the high complexity of the superposition of the multi-layer transmission and the DFT precoding, the existing protocol only supports single-layer PUSCH transmission.

[0063] In the new MIMO mode, the terminal can sample the time-domain signal by using the fast changeable antenna characteristics within a symbol period (T) and map the time-domain sampling points to the virtual receiving channels corresponding to the antenna characteristics. As shown in FIG. 4, after time-frequency transformation (such as fast Fourier transform (FFT)), the energy of the sampling points corresponding to different antenna characteristics will spread to other subcarriers, that is, ICI interference is generated. In the downlink transmission process, this ICI interference will be superimposed with the pilot of the reference signal such as the demodulation reference signal (DMRS) and the channel state information-reference signal (CSI-RS), thereby affecting the accuracy of the terminal channel measurement and reducing the demodulation performance of the receiving end.

[0064] Based on the above analysis, it can be found that when the terminal expands the receiving channel by quickly changing the antenna characteristics, the ICI interference may be generated due to the limitation of the switching speed, which affects the detection performance of the receiver. If the base station can estimate the ICI according to the antenna characteristic switching mode of the terminal, the ICI can be preprocessed, which is beneficial to reduce the calculation complexity and power consumption of the terminal for eliminating the ICI and other overheads. Based on this, the following embodiments of the present disclosure are proposed.

[0065] The embodiment of the present disclosure provides a preprocessing method. FIG. 5 is a flowchart of the preprocessing method of the embodiment of the present disclosure; as shown in FIG. 5, the method comprises:

[0066] Step 101: The network device receives the first information and the first reference signal sent by the terminal, the first information is used to instruct or inform the network device to perform ICI preprocessing, and the first information comprises antenna characteristic indication information;

[0067] Step 102: The network device predicts ICI based on the first information and the first reference signal, and obtains an ICI prediction result.

[0068] Step 103: The network device pre-processes the signal based on the ICI prediction result.

[0069] FIG. 6 is a flowchart of a pre-processing method according to an embodiment of the present disclosure; as shown in FIG. 6, the method comprises:

[0070] Step 201: The terminal determines whether ICI exists in downlink reception according to supported antenna characteristics and an oversampling multiple.

[0071] Step 202: When the terminal determines that ICI exists in downlink reception, the terminal sends first information to a network device and sends a first reference signal to the network device through different antenna characteristics, wherein the first information is used to instruct or inform the network device to perform ICI pre-processing, and the first information comprises antenna characteristic indication information; the first information and the first reference signal are used by the network device to predict ICI to obtain an ICI prediction result for pre-processing of a signal.

[0072] In the embodiment, the network device is specifically an access network or an access network device. For example, the access network or the access network device can be a base station or other related devices.

[0073] In the embodiment, if the terminal determines that ICI exists in downlink reception, the terminal sends first information to the network device, wherein the first information is used to instruct or inform the network device to perform ICI pre-processing. The first information can also be referred to as an ICI pre-processing request, and the network device can perform ICI pre-processing on a transmitted signal according to the first information. In other optional embodiments, the first information can also be used to instruct or inform the network device to perform or not to perform ICI pre-processing. That is, the terminal judges whether ICI exists in downlink reception according to supported antenna characteristics and an oversampling multiple, and obtains a judgment result; the judgment result can comprise that ICI exists or does not exist in downlink reception; then the terminal sends first information to the network device, wherein the first information can comprise the judgment result, or the first information is used to instruct or inform the network device to perform or not to perform ICI pre-processing; in the case where the first information is used to instruct or inform the network device to perform ICI pre-processing, the network device performs processing as described in steps 102 to 103.

[0074] In the embodiments of the present disclosure, the terminal determines whether ICI is generated in downlink reception according to the antenna characteristics supported by the terminal and the oversampling multiple, and notifies the network device of the need for ICI preprocessing of the transmitted signal when it is determined that ICI exists in downlink reception; the network device predicts ICI according to the antenna characteristic indication information of the terminal and the received first reference signal, and pre-processes the transmitted signal according to the ICI prediction result. In this way, the calculation complexity and overhead of ICI elimination of the terminal can be reduced, and the transmission performance and practical value of the new MIMO system can be improved.

[0075] In the embodiments of the present disclosure, the antenna characteristics include an antenna characteristic switching mode. The antenna characteristics that change rapidly in a symbol period in the MIMO communication system include but are not limited to beams of the terminal, for example, the antenna characteristics can include but are not limited to phases of analog phase shifters (i.e., analog beams), array characteristics (such as impedance / loading of antennas, characteristics of intelligent reflecting surfaces), angular positions (such as rotation / movement of antenna arrays), etc. The antenna characteristics supported by the terminal include the antenna characteristic switching mode supported by the terminal, for example, the antenna characteristics supported by the terminal include the phases of analog phase shifters (i.e., analog beams), array characteristics (such as impedance / loading of antennas, characteristics of intelligent reflecting surfaces), angular positions (such as rotation / movement of antenna arrays), etc.

[0076] In the embodiments of the present disclosure, the antenna characteristic indication information is used to indicate the antenna characteristics of the terminal or used to indicate changes in the antenna characteristics of the terminal, and can be specifically used to indicate the antenna characteristic switching mode of the terminal; in other optional embodiments, the antenna characteristic indication information can include antenna characteristic switching mode information.

[0077] In some optional embodiments, the antenna characteristic indication information includes the number of antenna characteristics and the number of sampling points occupied by each antenna characteristic continuously; the terminal determines whether ICI exists in downlink reception according to the antenna characteristics supported by the terminal and the oversampling multiple, including: the terminal determines the total number of sampling points of all antenna characteristics according to the number of antenna characteristics and the number of sampling points occupied by each antenna characteristic continuously; when the total number of sampling points is less than or equal to the oversampling multiple, it is determined that ICI does not exist in downlink reception; when the total number of sampling points is greater than the oversampling multiple, it is determined that ICI exists in downlink reception.

[0078] In the present embodiment, the antenna characteristic indication information (or antenna characteristic switching mode information) includes the number N of antenna characteristics f and the number of sampling points occupied by each antenna characteristic continuously wherein the number of sampling points occupied by each antenna characteristic continuously can also be referred to as a beam switching interval. The antenna characteristics supported by the terminal (such as the antenna characteristic switching mode) and the oversampling multiple O sThe terminal jointly determines whether ICI is generated in the receiving process. The terminal determines the total number of sampling points occupied by all antenna characteristics in succession according to the number of antenna characteristics and the number of sampling points occupied by each antenna characteristic in succession, and determines that there is no ICI in the downlink receiving when the total number of sampling points is less than or equal to the oversampling multiple, and determines that there is ICI in the downlink receiving when the total number of sampling points is greater than the oversampling multiple. The specific process can be referred to expression (1).

[0079] For example, FIG. 7 is a schematic diagram of terminal downlink receiving in the signal preprocessing method of the embodiment of the present disclosure. As shown in FIG. 7, taking MIMO downlink transmission as an example, the terminal can realize two different antenna characteristics (i.e., beam 1 and beam 2) by adjusting the phase of the phase shifter. The terminal can realize receiving two data streams by using one radio frequency channel by performing oversampling processing on the analog signal by using two beams in one OFDM symbol period.

[0080] To avoid generating ICI, the terminal needs to switch N f antenna characteristics in O s oversampling periods, that is, to satisfy:

[0081] wherein O s is an oversampling multiple, is the number of sampling points of the i-th antenna characteristic. The terminal using different antenna characteristics (or antenna characteristic switching mode) will determine whether ICI is generated in the receiving process. Referring to FIGS. 8a and 8b, taking the oversampling multiple O s = 2 and the number of antenna characteristics N f = 2 as an example:

[0082] (a) L s = 1, two beams last for 1 sampling period respectively and are mapped to different channels. Channel 1 obtains original sampling points and channel 2 obtains oversampled sampling points. Since the oversampling is interpolation processing, the information of adjacent sampling points is contained, and the information of each group of sampling points can be obtained by channel 1 and channel 2, so that ICI is not generated; refer to FIG. 8a;

[0083] (b) L s = 2, two beams last for 2 sampling periods respectively and are mapped to different channels. Since channel 1 can only obtain the information of the 1st, 3rd, 5th... group of sampling points, and channel 2 can only obtain the information of the 2nd, 4th, 6th... group of sampling points. The data of the two channels both lose part of the sampling point information, so that ICI is generated; refer to FIG. 8b.

[0084] In some optional embodiments, for the terminal side: the antenna characteristic indication information includes the number of antenna characteristics and the number of sampling points occupied by each antenna characteristic successively; the sending of the first information to the network device includes: the terminal sending uplink control information to the network device, the uplink control information including a first field and a second field, the first field being used to carry the number of antenna characteristics, and the second field being used to carry the number of sampling points occupied by each antenna characteristic successively. Correspondingly, for the network device side: the receiving of the first information sent by the terminal includes: the network device receiving the uplink control information sent by the terminal, the uplink control information including a first field and a second field, the first field being used to carry the number of antenna characteristics, and the second field being used to carry the number of sampling points occupied by each antenna characteristic successively.

[0085] In this embodiment, the terminal can send the first information to the network device by using uplink control information (UCI, Uplink Control Information) through PUCCH / PUSCH. At present, the uplink control information (UCI) mainly includes: ①uplink scheduling request (SR, Schedule Request), ②hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat reQuest) information (ACK / NACK), and ③channel state information (CSI, Channel State Information) (for example, including: channel quality indicator (CQI, Channel Quality Indicator), pre-coding matrix indication (PMI, Pre-coding Matrix Indication), rank indication (RI, Rank Indication), etc.).

[0086] In the embodiment, the antenna feature of the terminal changes, which also causes the change of the equivalent transmission channel. Therefore, the antenna feature of the terminal (for example, antenna feature switching mode information) can be quantified and reported in a similar way as the channel status information (CSI). In the embodiment, the content of the existing uplink control information (UCI) is extended, and a first field and a second field are added. The first field is used to carry the antenna feature number (AFN), and the second field is used to carry the number of sampling points occupied by each antenna feature continuously. The number of sampling points occupied by each antenna feature continuously can also be referred to as the switching interval sample number (SISN). In other optional embodiments, the first field can also be referred to as an AFN field, and / or the second field can also be referred to as an SISN field.

[0087] In some optional embodiments, the number of bits of the first field is related to the antenna feature number, and / or the number of bits of the second field is related to the number of sampling points occupied by each antenna feature continuously. In some optional embodiments, the first field occupies bits, and / or the second field occupies bits; wherein, represents the upward rounding of log2(N f ), represents the upward rounding of log2(L S ).

[0088] In other optional embodiments, the terminal can also send the first information to the network device through radio resource control (RRC) signaling. Correspondingly, the network device can also receive the first information sent by the terminal through RRC signaling.

[0089] In some optional embodiments of the present disclosure, the network device predicts the ICI based on the first information and the first reference signal to obtain an ICI prediction result, including: the network device measures the first reference signal sent by the terminal through different antenna features to obtain a measurement result; and the network device predicts the ICI based on the measurement result and the antenna feature indication information to obtain an ICI prediction result.

[0090] In this embodiment, after the network device receives the first information sent by the terminal, or after the terminal sends the first information to the network device, the terminal sends the first reference signal to the network device through different antenna characteristics, and the network device measures the first reference signal sent by the terminal through different antenna characteristics to obtain a measurement result. The measurement result at least includes the uplink channel condition. In some optional embodiments, the first reference signal can be a sounding reference signal (SRS). Further, the network device predicts the ICI based on the measurement result and the antenna characteristic indication information carried in the first information to obtain an ICI prediction result.

[0091] In some optional embodiments of the present disclosure, for the network device side: before the network device receives the first reference signal sent by the terminal, the method further includes: the network device sends second information to the terminal, the second information including resource configuration information of the first reference signal, and the resource configuration information of the first reference signal is determined by the network device according to the antenna characteristic indication information in the first information. Correspondingly, for the terminal side: before the terminal sends the first reference signal to the network device through different antenna characteristics, the method further includes: the terminal receives the second information sent by the network device, the second information including resource configuration information of the first reference signal, and the resource configuration information of the first reference signal is determined by the network device according to the antenna characteristic indication information in the first information.

[0092] In some optional embodiments, the terminal sends the first reference signal to the network device through different antenna characteristics, including: the terminal sends the first reference signal to the network device through different antenna characteristics according to the resource configuration information, and each first reference signal lasts for one symbol period.

[0093] In this embodiment, the network device can know that ICI pre-processing is needed after receiving the first information. In order to estimate the ICI introduced by the terminal antenna characteristic switching, the terminal needs to be notified to send the first reference signal through different antenna characteristics to obtain the downlink channel. Therefore, the network device configures the resource configuration information of the first reference signal according to the antenna characteristic indication information (for example, the number of antenna characteristics) in the first information; the terminal sends the first reference signal to the network device through different antenna characteristics according to the resource configuration information. In other optional embodiments, the second information can be used to request the terminal to send the first reference signal in addition to being used to configure the resources of the reference signal.

[0094] Exemplarily, the resource configuration information is used for configuring a number of symbols occupied by the first reference signal in a time domain. Taking SRS as the first reference signal, the network device can configure the resource of the SRS through an SRS resource (SRS-Resource). A field of "nrofSymbols" in the SRS resource (SRS-Resource) is set to 1, which indicates that the terminal respectively sends N f SRSs, each SRS lasts for one symbol period, that is, one SRS corresponds to each antenna characteristic. Correspondingly, N f SRS resources (resources) need to be configured in one SRS resource set (resource set), exemplarily, the configuration mode of each SRS resource is as follows:

[0095] That is, each SRS occupies one symbol in the time domain, and the starting position l0=13-startPosition is respectively indicated through the field "startPosition".

[0096] In the embodiment, since the switching order of the antenna characteristics will affect the actual generated ICI, the network device needs to obtain the switching order of the antenna characteristics to estimate the ICI. In order to reduce the signaling overhead, the switching order of the antenna characteristics can be implicitly notified to the network device through the order in which the terminal sends the first reference signal. The terminal sends the first reference signal through the corresponding antenna characteristic according to the switching order of the antenna characteristics. Further, the network device obtains the measurement results by sequentially measuring the first reference signal, and predicts the ICI according to the measurement results and in combination with the antenna characteristic indication information (such as antenna characteristic switching mode information) to obtain the ICI prediction result.

[0097] In some optional embodiments of the present disclosure, the network device predicts the ICI based on the measurement results and the antenna characteristic indication information to obtain the ICI prediction result, including: the network device obtains a first frequency domain channel matrix corresponding to each antenna characteristic based on the measurement result of each first reference signal, and performs transformation processing on each first frequency domain channel matrix to obtain a corresponding first time domain channel matrix; the network device combines the first time domain channel matrix corresponding to each antenna characteristic according to the antenna characteristic indication information to obtain a second time domain channel matrix; and the network device performs Fourier transformation processing on the second time domain channel matrix to obtain an equivalent channel matrix and an ICI matrix.

[0098] FIG. 9 is a schematic diagram of a base station estimating ICI in a signal preprocessing method according to an embodiment of the present disclosure; as shown in FIG. 9, the terminal transmits SRSs lasting one symbol period to the base station respectively by using variable antenna characteristics (i.e., beam 1 and beam 2) in the downlink reception process. The base station obtains the downlink frequency domain channel corresponding to beam 1 and beam 2 respectively by measuring the SRSs based on channel reciprocity The is a first frequency domain channel matrix corresponding to beam 1 and beam 2 respectively; the first frequency domain channel matrix is processed by inverse fast Fourier transform (IFFT) to obtain the corresponding time domain channel The first time domain channel matrix corresponding to beam 1 and beam 2 respectively is s , the antenna characteristic switching mode information is specifically the beam switching interval or the number of sampling points L are combined respectively to obtain the downlink time domain channel switched in this way The is the second time domain channel matrix; finally, the is transformed by FFT to obtain the equivalent channel matrix of the downlink channel and the downlink ICI interference The can be called an ICI matrix.

[0099] In this embodiment, the network device predicts ICI according to the measurement result of the first reference signal and the antenna characteristic indication information (such as antenna characteristic switching mode information), specifically, the network device estimates the ICI matrix based on the measurement result and the antenna characteristic indication information (such as antenna characteristic switching mode information) The ICI preprocessing matrix W ICI can be calculated in a minimum mean square error (MMSE), zero forcing (ZF), block diagonalization (BD) or other way ICI ; and the signal is preprocessed based at least on the ICI preprocessing matrix W

[0100] In some optional embodiments of the present disclosure, the network device performs preprocessing on the signal based on the ICI prediction result, including: the network device processes the second reference signal based on the ICI prediction result, and transmits the processed second reference signal; the network device receives the channel state information transmitted by the terminal, and performs preprocessing on the signal based on the channel state information; wherein the channel state information is obtained by the terminal measuring the processed second reference signal. Correspondingly, for the terminal side, after step 202, the method further includes: the terminal receives the second reference signal transmitted by the network device, the second reference signal being the reference signal processed by the network device based on the ICI prediction result; measures the second reference signal to obtain the channel state information, and transmits the channel state information to the network device.

[0101] In some optional embodiments, the ICI prediction result includes an ICI matrix; and the network device processes the second reference signal based on the ICI prediction result, including: the network device obtains a first preprocessing matrix based on the ICI matrix, and processes the second reference signal based on the first preprocessing matrix.

[0102] In this embodiment, after the network device obtains the ICI prediction result, i.e., obtains the ICI matrix, the network device obtains a first preprocessing matrix based on the ICI matrix, processes the second reference signal based on the first preprocessing matrix, and transmits the processed second reference signal. Exemplarily, the second reference signal can be a CSI-RS, which is used to measure the channel state information of the terminal after channel expansion, and the channel state information includes, for example, a CSI-RS resource indication (CRI), an RI, a PMI, and the like. The terminal measures the second reference signal to obtain channel state information (CSI) representing channel quality, and transmits the channel state information (CSI) to the network device; the network device processes the signal based on the channel state information (CSI) fed back by the terminal, specifically performs user scheduling, pairing, and precoding processing, and transmits the processed signal for the terminal to complete signal reception by using variable antenna characteristics.

[0103] In some optional embodiments, the preprocessing on the signal based on the channel state information includes: the network device determines a second preprocessing matrix based on the channel state information, and pre-processes the signal based on the first preprocessing matrix and the second preprocessing matrix.

[0104] In this embodiment, the network device pre-processes the signal based on the channel state information (CSI) fed back by the terminal, specifically performs user scheduling, pairing, and precoding processing.

[0105] In this embodiment, in order to be compatible with the antenna characteristic variable downlink channel measurement of the reference signal such as CSI-RS, the ICI preprocessing of the network device is located after the resource mapping and before the OFDM modulation, and specifically, the transmitted signal sequentially passes through the layer mapping and the digital precoding W mapping to different antenna ports, as shown in FIG. 10; at each antenna port, the data and the related reference signal pilot (such as DMRS, CSI-RS...) are corresponded to different time-frequency resources through the resource mapping; further, the base station will utilize the ICI matrix W ICI The frequency domain signal is processed before the OFDM modulation. Among them, the digital precoding and the ICI preprocessing can be regarded as two sub-matrices sequentially, and are equivalently represented as Among them, W is the digital precoding matrix of the digital precoding process, that is, the second preprocessing matrix, and W ICI is the ICI matrix, that is, the first preprocessing matrix.

[0106] Again, as shown in FIG. 10, since the CSI-RS performs channel measurement on different antenna ports, if the channel experienced by the CSI-RS contains ICI, the downlink channel information (CQI, RI, PMI, etc.) after the channel is expanded by the terminal antenna characteristic switching cannot be obtained. Therefore, the ICI preprocessing is performed after the CSI-RS is inserted, that is, the first preprocessing matrix (the ICI preprocessing matrix W ICI ) is used to process the CSI-RS to offset the ICI introduced by the terminal. Similarly, for the demodulation reference signal (DM-RS, Demodulation Reference Signal), since it has been inserted before the precoding, the ICI preprocessing can offset the ICI introduced by the terminal.

[0107] For example, FIG. 11 is an interactive flowchart of the signal preprocessing method of the embodiment of the present disclosure; taking the network device as the base station as an example, as shown in FIG. 11, the signal preprocessing process can include: first, the terminal determines whether the antenna characteristic switching of itself will produce ICI according to the antenna characteristic (such as including N f and L S ) and the oversampling multiple O s ; if it is determined that there is ICI, the first information for indicating or informing the ICI preprocessing is sent to the base station, and the antenna characteristic indication information (including N f and L S ) is included in the first information to request the base station to perform the ICI preprocessing on the transmitted signal.

[0108] The base station receives the first information and learns that ICI preprocessing is needed. Meanwhile, in order to estimate the ICI introduced by the switching of the terminal antenna characteristics, the terminal needs to be notified to send SRS through different antenna characteristics respectively to obtain the downlink channel. Therefore, the base station will configure the number of symbols occupied by SRS in the time domain according to the number of antenna characteristics N f reported by the terminal f , that is, set the "nrofSymbols" field in SRS-Resource to 1, instructing the terminal to send N f SRS respectively, each of which lasts one symbol period.

[0109] Since the switching sequence of the terminal antenna characteristics will affect the actual ICI interference, the base station needs to obtain the switching sequence to estimate the ICI interference. In order to reduce the signaling overhead, the switching sequence can be implicitly notified to the base station through the order in which the terminal sends SRS, that is, the terminal sends N s SRS through the corresponding antenna characteristics in turn according to the switching sequence of its antenna characteristics; the base station measures the SRS in turn and combines the antenna characteristic switching mode of the terminal to estimate the ICI interference and obtain the ICI preprocessing matrix. In this process, the base station obtains the first frequency domain channel matrix corresponding to each antenna characteristic (or beam) according to the measurement result, transforms the first frequency domain channel matrix through IFFT to obtain the corresponding first time domain channel matrix; then combines each first time domain channel matrix according to the antenna characteristic indication information (such as antenna characteristic switching mode information, specifically beam switching interval or the number of sampling points L ICI occupied by each antenna characteristic continuously , respectively obtains the corresponding time domain channel matrix; finally, performs FFT transformation on the time domain channel matrix to obtain the equivalent channel matrix and the downlink ICI matrix .

[0110] The base station sends the ICI-preprocessed CSI-RS for measuring the actual channel state information (such as CRI, RI, PMI) of the terminal channel extension. Exemplarily, the ICI-preprocessed CSI-RS is the CSI-RS obtained by processing the CSI-RS through the ICI preprocessing matrix W ICI . The terminal measures the ICI-preprocessed CSI-RS to obtain the channel state information (CSI) and sends the CSI report to the base station, which can include CRI, RI, CQI and other information.

[0111] The base station performs user scheduling, pairing and precoding based on the CSI fed back by the terminal, and sends the ICI pre-processed signal, and the terminal uses variable antenna characteristics to complete the data signal. Specifically, the base station uses a first pre-processing matrix and an ICI pre-processing matrix W ICI processes the signal; wherein the first pre-processing matrix is a digital precoding matrix W. Wherein, for example, the base station can send the ICI pre-processed PDSCH.

[0112] Based on the above embodiments, the embodiments of the present disclosure also provide a pre-processing device, which is applied to a network equipment. FIG. 12 is a schematic diagram of the composition structure of the pre-processing device according to an embodiment of the present disclosure; as shown in FIG. 12, the device comprises a first communication unit 31 and a first processing unit 32; wherein,

[0113] The first communication unit 31 is configured to receive the first information and the first reference signal sent by the terminal, wherein the first information is used to instruct or inform the network equipment to perform ICI pre-processing, and the first information comprises antenna characteristic indication information;

[0114] The first processing unit 32 is configured to predict ICI based on the first information and the first reference signal, and obtain an ICI prediction result; and pre-process the signal based on the ICI prediction result.

[0115] In some optional embodiments of the present disclosure, the first communication unit 31 is further configured to send second information to the terminal before receiving the first reference signal sent by the terminal, wherein the second information comprises resource configuration information of the first reference signal, and the resource configuration information of the first reference signal is determined by the network equipment according to the antenna characteristic indication information in the first information.

[0116] In some optional embodiments of the present disclosure, the antenna characteristic indication information comprises the number of antenna characteristics and the number of sampling points occupied by each antenna characteristic; and the first communication unit 31 is configured to receive uplink control information sent by the terminal, wherein the uplink control information comprises a first field and a second field, the first field is used to carry the number of antenna characteristics, and the second field is used to carry the number of sampling points occupied by each antenna characteristic.

[0117] In some optional embodiments of the present disclosure, the first processing unit 32 is configured to measure the first reference signal sent by the terminal through different antenna characteristics, and obtain a measurement result; and predict ICI based on the measurement result and the antenna characteristic indication information, and obtain an ICI prediction result.

[0118] In some optional embodiments of the present disclosure, the first processing unit 32 is configured to obtain a first frequency-domain channel matrix corresponding to each antenna characteristic based on the measurement result of each first reference signal, perform transform processing on each first frequency-domain channel matrix to obtain a corresponding first time-domain channel matrix, combine the first time-domain channel matrix corresponding to each antenna characteristic according to the antenna characteristic indication information to obtain a second time-domain channel matrix, and perform Fourier transform processing on the second time-domain channel matrix to obtain an equivalent channel matrix and an ICI matrix.

[0119] In some optional embodiments of the present disclosure, the first processing unit 32 is configured to process a second reference signal based on the ICI prediction result, send the processed second reference signal through the first communication unit 31, receive channel state information sent by the terminal through the first communication unit 31, and pre-process a signal based on the channel state information, wherein the channel state information is obtained by the terminal by measuring the processed second reference signal.

[0120] In some optional embodiments of the present disclosure, the ICI prediction result includes an ICI matrix, and the first processing unit 32 is configured to obtain a first pre-processing matrix based on the ICI matrix and process the second reference signal based on the first pre-processing matrix.

[0121] In some optional embodiments of the present disclosure, the first processing unit 32 is configured to determine a second pre-processing matrix based on the channel state information and pre-process a signal based on the first pre-processing matrix and the second pre-processing matrix.

[0122] In the embodiments of the present disclosure, the first processing unit 32 in the device can be implemented by a central processing unit (CPU), a digital signal processor (DSP), a microcontroller unit (MCU) or a field-programmable gate array (FPGA) in actual application, and the first communication unit 31 in the device can be implemented by a communication module (including a basic communication suite, an operating system, a communication module, a standardized interface and a protocol) and a transceiving antenna in actual application.

[0123] The embodiments of the present disclosure further provide a pre-processing device, which is applied to a terminal. FIG. 13 is a schematic structural diagram two of a pre-processing device according to an embodiment of the present disclosure. As shown in FIG. 13, the device includes a second processing unit 41 and a second communication unit 42, wherein,

[0124] The second processing unit 41 is configured to determine whether ICI exists in downlink reception according to supported antenna characteristics and an oversampling multiple.

[0125] The second communication unit 42 is configured to, when it is determined that ICI exists in downlink reception, send first information to a network device and send first reference signals to the network device through different antenna characteristics, the first information being used to instruct or inform the network device to perform ICI preprocessing, the first information including antenna characteristic indication information; the first information and the first reference signals being used by the network device to predict ICI to obtain an ICI prediction result used for preprocessing of a signal.

[0126] In some optional embodiments of the present disclosure, the second communication unit 42 is configured to, before sending the first reference signals to the network device through different antenna characteristics, receive second information sent by the network device, the second information including resource configuration information of the first reference signals, the resource configuration information of the first reference signals being determined by the network device according to the antenna characteristic indication information in the first information.

[0127] In some optional embodiments of the present disclosure, the second communication unit 42 is configured to send the first reference signals to the network device through different antenna characteristics according to the resource configuration information, wherein each first reference signal lasts for one symbol period.

[0128] In some optional embodiments of the present disclosure, the antenna characteristic indication information includes a number of antenna characteristics and a number of sampling points occupied by each antenna characteristic consecutively; and the second communication unit 42 is configured to send uplink control information to the network device, the uplink control information including a first field and a second field, the first field being used to carry the number of antenna characteristics, and the second field being used to carry the number of sampling points occupied by each antenna characteristic consecutively.

[0129] In some optional embodiments of the present disclosure, the antenna characteristic indication information includes a number of antenna characteristics and a number of sampling points occupied by each antenna characteristic consecutively; and the second processing unit 41 is configured to determine a total number of sampling points of all antenna characteristics according to the number of antenna characteristics and the number of sampling points occupied by each antenna characteristic consecutively; determine that ICI does not exist in downlink reception when the total number of sampling points is less than or equal to the oversampling multiple; and determine that ICI exists in downlink reception when the total number of sampling points is greater than the oversampling multiple.

[0130] In some optional embodiments of the present disclosure, the second communication unit 42 is further configured to receive a second reference signal sent by the network device, the second reference signal being a reference signal processed by the network device based on the ICI prediction result; measure the second reference signal to obtain channel state information, and send the channel state information to the network device.

[0131] In the embodiments of the present disclosure, the second processing unit 41 in the device can be implemented by a CPU, a DSP, an MCU or an FPGA in actual application; and the second communication unit 42 in the device can be implemented by a communication module (including a basic communication suite, an operating system, a communication module, a standardized interface and a protocol, etc.) and a transceiving antenna in actual application.

[0132] It should be noted that the signal preprocessing device provided by the above embodiments is only taken as an example for dividing the above program modules when performing signal preprocessing, and in actual application, the above processing can be completed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules to complete all or part of the above-described processing. In addition, the signal preprocessing device and the signal preprocessing method provided by the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be repeated here.

[0133] The embodiments of the present disclosure further provide a communication device, which is a network device or a terminal. FIG. 14 is a schematic diagram of the hardware composition structure of the communication device according to the embodiments of the present disclosure. As shown in FIG. 14, the communication device includes a memory 52, a processor 51 and a computer program stored in the memory 52 and executable on the processor 51, and the processor 51 implements the steps of the signal preprocessing method applied to the network device or the terminal according to the embodiments of the present disclosure when executing the program.

[0134] Optionally, the communication device can further include at least one network interface 53. Each component in the communication device is coupled together through a bus system 54. It can be understood that the bus system 54 is used to realize the connection communication between the components. In addition to including a data bus, the bus system 54 also includes a power supply bus, a control bus and a state signal bus. However, in order to clearly illustrate, various buses are marked as the bus system 54 in FIG. 14.

[0135] It can be understood that the memory 52 can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a ferromagnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM). The magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example but not limitation, many forms of RAM can be used, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), sync link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM).The memory 52 described in the embodiments of the present disclosure is intended to include, but not limited to, these and any other suitable type of memory.

[0136] The method disclosed in the embodiments of the present disclosure can be applied to the processor 51 or implemented by the processor 51. The processor 51 can be an integrated circuit chip having a processing capability of signals. In the implementation process, each step of the above method can be completed by the integrated logic circuit of hardware in the processor 51 or the instruction in the form of software. The processor 51 described above can be a general processor, a DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The processor 51 can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present disclosure. The general processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiments of the present disclosure, the hardware decoding processor can be directly embodied to execute the above-mentioned method, or the combination of hardware and software modules in the decoding processor can be executed. The software module can be located in the storage medium, which is located in the memory 52. The processor 51 reads the information in the memory 52 and combines the hardware to complete the steps of the above-mentioned method.

[0137] In the exemplary embodiments, the communication device can be implemented by one or more ASICs (Application Specific Integrated Circuits), DSPs, PLDs (Programmable Logic Devices), CPLDs (Complex Programmable Logic Devices), FPGAs, general-purpose processors, controllers, MCUs, microprocessors, or other electronic elements, for executing the above-mentioned method.

[0138] In the exemplary embodiments, the embodiments of the present disclosure also provide a computer-readable storage medium, such as the memory 52 including a computer program, which can be executed by the processor 51 of the communication device to complete the steps of the above-mentioned method. The computer-readable storage medium can be FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disc, or CD-ROM, etc. The computer-readable storage medium can also be various devices including one or any combination of the above-mentioned memories.

[0139] The computer-readable storage medium provided by the embodiments of the present disclosure has a computer program stored thereon, which is executed by the processor to implement the steps of the signal preprocessing method applied to the network device or terminal according to the embodiments of the present disclosure.

[0140] The embodiments of the present disclosure further provide a computer program product comprising a computer program, which can be executed by a communication device (e.g., the processor 51 of the communication device) to complete the steps of any of the aforementioned signal preprocessing methods.

[0141] The disclosed features in the several method or product embodiments provided by the present disclosure can be combined arbitrarily without conflict, to obtain new method embodiments or product embodiments.

[0142] In the several embodiments provided by the present disclosure, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic, for example, the division of the units is only a logical function division, and there can be another division manner in actual implementation, for example, a plurality of units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the various components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0143] The units described as separate components above can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment.

[0144] In addition, each functional unit in each embodiment of the present disclosure can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be realized in the form of hardware, or in the form of hardware plus software function unit.

[0145] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction related hardware, and the aforementioned program can be stored in a computer readable storage medium, and the program is executed to perform steps including the above-mentioned method embodiments; and the aforementioned storage medium includes mobile storage devices, ROM, RAM, magnetic discs or optical discs and various program code storage media.

[0146] Alternatively, the above-mentioned integrated units of the present disclosure, if implemented in the form of software function modules and sold or used as independent products, can also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product, and the computer software product is stored in a storage medium, and includes several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the methods described in the various embodiments of the present disclosure. The aforementioned storage medium includes: mobile storage devices, ROM, RAM, magnetic disks or optical disks, and various other media that can store program codes.

[0147] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A method for signal preprocessing, the method is applied to a network device, and the method comprises the following steps: The network device receives first information and first reference signals sent by a terminal, wherein the first information is used to instruct or inform the network device to perform inter-carrier interference (ICI) preprocessing, and the first information comprises antenna characteristic indication information; The network device performs ICI prediction based on the first information and the first reference signals, and obtains an ICI prediction result; The network device performs signal preprocessing based on the ICI prediction result.

2. The method of claim 1, wherein, Before the network device receives the first reference signals sent by the terminal, the method further comprises the following steps: The network device sends second information to the terminal, wherein the second information comprises resource configuration information of the first reference signals, and the resource configuration information of the first reference signals is determined by the network device according to the antenna characteristic indication information in the first information.

3. The method of claim 1, wherein, The antenna characteristic indication information comprises the number of antenna characteristics and the number of sampling points occupied by each antenna characteristic continuously. The network device receives the first information sent by the terminal, comprising: The network device receives uplink control information sent by the terminal, wherein the uplink control information comprises a first field and a second field, the first field is used to carry the number of antenna characteristics, and the second field is used to carry the number of sampling points occupied by each antenna characteristic continuously.

4. The method of claim 1, wherein, The network device performs ICI prediction based on the first information and the first reference signals, and obtains an ICI prediction result, comprising: The network device measures the first reference signals sent by the terminal through different antenna characteristics, and obtains measurement results; The network device performs ICI prediction based on the measurement results and the antenna characteristic indication information, and obtains an ICI prediction result.

5. The method of claim 4, wherein, The network device performs ICI prediction based on the measurement results and the antenna characteristic indication information, and obtains an ICI prediction result, comprising: The network device obtains a first frequency domain channel matrix corresponding to each antenna characteristic based on the measurement result of each first reference signal, and performs transformation processing on each first frequency domain channel matrix to obtain a corresponding first time domain channel matrix; The network device combines the first time domain channel matrix corresponding to each antenna characteristic according to the antenna characteristic indication information, and obtains a second time domain channel matrix; The network device performs Fourier transformation processing on the second time domain channel matrix to obtain an equivalent channel matrix and an ICI matrix.

6. The method of claim 1, wherein, The network device performs signal preprocessing based on the ICI prediction result, comprising: The network device processes a second reference signal based on the ICI prediction result, and sends the processed second reference signal; The network device receives channel state information sent by the terminal, and performs signal preprocessing based on the channel state information, wherein the channel state information is obtained by the terminal by measuring the processed second reference signal.

7. The method of claim 6, wherein, The ICI prediction result comprises an ICI matrix; The network device processes a second reference signal based on the ICI prediction result, comprising: The network device obtains a first pre-processing matrix based on the ICI matrix, and processes the second reference signal based on the first pre-processing matrix.

8. The method of claim 7, wherein, The pre-processing of the signal based on the channel state information comprises: The network device determines a second pre-processing matrix based on the channel state information, and pre-processes the signal based on the first pre-processing matrix and the second pre-processing matrix.

9. A signal pre-processing method, applied to a terminal, the method comprising: The terminal determines whether there is inter-carrier interference (ICI) in downlink reception according to supported antenna characteristics and an oversampling multiple; When the terminal determines that there is ICI in downlink reception, the terminal sends first information to a network device and sends first reference signals to the network device through different antenna characteristics, the first information being used to instruct or inform the network device to perform ICI pre-processing, the first information comprising antenna characteristic indication information; the first information and the first reference signals being used by the network device to predict ICI to obtain an ICI prediction result used for pre-processing of a signal.

10. The method of claim 9, wherein, Before the terminal sends the first reference signals to the network device through different antenna characteristics, the method further comprises: The terminal receives second information sent by the network device, the second information comprising resource configuration information of the first reference signals, the resource configuration information of the first reference signals being determined by the network device according to the antenna characteristic indication information in the first information.

11. The method of claim 10, wherein, The sending of the first reference signals to the network device through different antenna characteristics comprises: The terminal sends the first reference signals to the network device through different antenna characteristics according to the resource configuration information, wherein each first reference signal lasts for one symbol period.

12. The method of claim 9, wherein, The antenna characteristic indication information comprises a number of antenna characteristics and a number of sampling points occupied by each antenna characteristic consecutively; and the sending of the first information to the network device comprises: The terminal sends uplink control information to the network device, the uplink control information comprising a first field and a second field, the first field being used to carry the number of antenna characteristics, and the second field being used to carry the number of sampling points occupied by each antenna characteristic consecutively.

13. The method of claim 9, wherein, The antenna characteristic indication information comprises a number of antenna characteristics and a number of sampling points occupied by each antenna characteristic consecutively; The terminal determines whether there is inter-carrier interference (ICI) in downlink reception according to supported antenna characteristics and an oversampling multiple, comprising: The terminal determines a total number of sampling points of all antenna characteristics according to the number of antenna characteristics and the number of sampling points occupied by each antenna characteristic consecutively; When the total number of sampling points is less than or equal to the oversampling multiple, it is determined that there is no inter-carrier interference (ICI) in downlink reception; When the total number of sampling points is greater than the oversampling multiple, it is determined that there is inter-carrier interference (ICI) in downlink reception.

14. The method of claim 9, wherein, The method further comprises: The terminal receives second reference signals sent by the network device, the second reference signals being reference signals processed by the network device based on the ICI prediction result; and The terminal sends uplink control information to the network device, the uplink control information comprising a first field and a second field, the first field being used to carry the number of antenna characteristics, and the second field being used to carry the number of sampling points occupied by each antenna characteristic consecutively. The terminal measures the second reference signal to obtain channel state information, and sends the channel state information to the network device.

15. A signal pre-processing apparatus, the apparatus being applied to a network device, the apparatus comprising: The first communication unit and the first processing unit; wherein, The first communication unit is configured to receive first information and a first reference signal sent by a terminal, the first information being used to instruct or inform the network device to perform inter-carrier interference (ICI) pre-processing, and the first information comprising antenna characteristic indication information; The first processing unit is configured to perform ICI prediction based on the first information and the first reference signal to obtain an ICI prediction result, and perform signal pre-processing based on the ICI prediction result.

16. A signal pre-processing apparatus, the apparatus being applied to a terminal, the apparatus comprising: The second processing unit and the second communication unit; wherein, The second processing unit is configured to determine whether there is ICI in downlink reception according to supported antenna characteristics and an oversampling multiple. The second communication unit is configured to send first information and a first reference signal to the network device through different antenna characteristics when the second processing unit determines that there is ICI in downlink reception, the first information being used to instruct or inform the network device to perform ICI pre-processing, the first information comprising antenna characteristic indication information, and the first information and the first reference signal being used by the network device to perform ICI prediction to obtain an ICI prediction result for signal pre-processing. 17.A computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the steps of the method of any one of claims 1 to 8; or which, when executed by a processor, implements the steps of the method of any one of claims 9 to 14. 18.A communication device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method of any one of claims 1 to 8 when executing the program; or the processor implements the steps of the method of any one of claims 9 to 14 when executing the program. 19.A computer program product comprising computer program instructions, which cause a computer to perform the steps of the method of any one of claims 1 to 8; or which cause a computer to perform the steps of the method of any one of claims 9 to 14.

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