CN115021858A - Interference suppression method and related device, base station and storage medium - Google Patents
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Abstract
The application discloses an interference suppression method, a related device, a base station and a storage medium, wherein the interference suppression method comprises the following steps: acquiring a receiving signal of a local cell; determining an interference statistical information set by utilizing the received signals, wherein the interference statistical information set comprises interference statistical information corresponding to communication resource positions where different interference signals are located; and equalizing the received signal by utilizing the interference statistical information set. According to the scheme, the signals received by the cell are balanced by acquiring the set of the interference statistical information containing the communication resource positions of different interference signals, and the suppression effect on the interference signals in the received signals can be improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to an interference suppression method, a related apparatus, a base station, and a storage medium.
Background
With the development of communication technology, people have higher and higher requirements on communication quality and communication rate, and certain interference signals, such as communication information between other base stations and another terminal, are inevitably received in the communication process. For example, in a scenario such as rapid deployment of a base station, since careful network planning cannot be performed, interference of a downlink signal of a neighboring cell with an uplink received signal of the cell cannot be avoided effectively. Therefore, in order to improve the communication quality, a method is urgently needed to suppress the interference signal in the received signal of the local cell so as to better restore the data transmitted by the communication terminal.
Disclosure of Invention
The application at least provides an interference suppression method and a related device, a base station and a storage medium.
A first aspect of the present application provides an interference suppression method, including: acquiring a received signal of a local cell; determining an interference statistical information set by utilizing the received signals, wherein the interference statistical information set comprises interference statistical information corresponding to communication resource positions where different interference signals are located; and utilizing the interference statistical information set to balance the received signals.
Wherein, the interference statistical information is an interference covariance matrix.
Wherein determining a set of interference statistics using the received signal comprises: acquiring interference statistical information of each received signal; the receiving signals comprise a first receiving signal positioned at the communication resource position of the interference signal and a second receiving signal not positioned at the communication resource position of the interference signal; acquiring average interference statistical information of each first receiving signal and average interference statistical information of each second receiving signal, wherein the average interference statistical information of the first receiving signals is an average value of the interference statistical information of all the first receiving signals, and the average interference statistical information of the second receiving signals is an average value of the interference statistical information of all the second receiving signals; and combining the average interference statistical information of each received signal to obtain an interference statistical information set.
Before obtaining the average interference statistical information of each first received signal and the average interference statistical information of each second received signal, the method further includes: and determining the positions of the communication resources of different interference signals, wherein the interference capacities of the different interference signals are different.
The different interference signals comprise different signals sent by adjacent cells.
Wherein, confirm the communication resource position of different interference signal, include: acquiring configuration information of a neighboring cell; and acquiring the communication resource positions of different signals sent by the adjacent cell according to the configuration information of the adjacent cell.
Wherein, the time sequences of the adjacent cell and the local cell are synchronous; acquiring configuration information of a neighboring cell, including: the cell searches the neighbor cell by starting the neighbor station monitoring to obtain the configuration information of the neighbor cell.
After equalizing the received signal, the method further comprises: and decoding the equalized received signal according to the used communication protocol flow to obtain an original signal corresponding to the received signal.
A second aspect of the present application provides an interference suppression apparatus, including: a signal acquisition module, configured to acquire a received signal of a local cell; the computing module is used for computing an interference statistical information set by utilizing the received signals, wherein the interference statistical information comprises interference statistical information corresponding to communication resource positions where different interference signals are located; and the equalizing module is used for equalizing the received signals by utilizing the interference statistical information set so as to suppress the interference signals in the received signals.
A third aspect of the present application provides a base station, comprising a processor and a communication circuit, wherein the processor is connected to the communication circuit, and is configured to implement the above interference suppression method.
A fourth aspect of the present application provides a computer-readable storage medium having stored thereon program instructions that, when executed by a processor, implement the interference suppression method described above.
According to the scheme, because the interference degrees of different interference signals to the received signal are probably different, the suppression effect of the interference signal in the received signal can be improved by acquiring the set containing the interference information corresponding to the communication resource positions where the different interference signals are located and then utilizing the set to balance the received signal.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.
Fig. 1 is a first flowchart of an embodiment of an interference suppression method according to the present application;
fig. 2 is a second flowchart of an embodiment of the interference suppression method of the present application;
fig. 3 is a schematic structural diagram of an embodiment of the interference suppression apparatus of the present application;
FIG. 4 is a block diagram of an embodiment of a base station of the present application;
FIG. 5 is a schematic structural diagram of an embodiment of a computer-readable storage medium of the present application.
Detailed Description
The following describes in detail the embodiments of the present application with reference to the drawings attached hereto.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, interfaces, techniques, etc. in order to provide a thorough understanding of the present application.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship. Further, "plurality" herein means two or more than two. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of A, B, C, and may mean including any one or more elements selected from the group consisting of A, B and C.
Referring to fig. 1, fig. 1 is a first flowchart illustrating an interference suppression method according to an embodiment of the present invention. Specifically, the following steps may be included:
step S11: and acquiring a received signal of the cell.
The cell refers to a basic unit of a wireless network, that is, the cell is an area for providing wireless communication services to users. One base station may include one cell or may include multiple cells, and the time synchronization of each cell may also exist when carrier frequencies used by different cells are the same. Where the received signal is a set of signals received at the current time. If the cell includes multiple antennas, the received signal may be a set of signals received by the multiple antennas at the current time.
Step S12: and determining an interference statistical information set by utilizing the received signals, wherein the interference statistical information set comprises interference statistical information corresponding to communication resource positions where different interference signals are located.
The different interference signals may be two or more interference signals or may be one interference signal. The interference signal is a signal that is not transmitted by the terminal of the cell, for example, a downlink signal of the remaining cell. Therefore, the type of the interference signal is not specifically defined here. The interference statistical information corresponding to the communication resource location of the different interference signals is obtained through the received signal of the local cell, for example, if a certain received signal is located at the communication resource location of the interference signal, the interference statistical information obtained through the received signal is the interference statistical information corresponding to the communication resource location of the interference signal. If a plurality of interference signals exist, and the communication resource positions where the received signals and the interference signals are located coincide, the calculated interference statistical information corresponding to the communication resource positions where the different interference signals are located is also a plurality of. Optionally, the interference statistic information corresponding to the communication resource location where the interference signal is located is determined according to the type of the interference signal. I.e., there may be multiple communication resource locations for a type of interfering signal, where a portion of the communication resource locations coincides with a communication resource location for a portion of the received signal, then the received signal corresponding to the portion of the communication resource locations may determine an interference statistic, i.e., the number of interference statistics is the same as the type of interfering signal. Where the communications resource locations may be carrier locations. The carrier refers to a carrier within a bandwidth range configured in the cell, and the carrier may be continuously divided into a plurality of subcarriers, and each subcarrier may be a communication resource location. In other embodiments, the communications resource locations may also be time domain locations.
Step S13: and utilizing the interference statistical information set to balance the received signals.
Since the interference statistic information set is calculated according to the location classification of the interference signal. The equalization of the received signal comprises a process of suppressing an interference signal in the received signal, the equalization of the received signal by using the interference statistical information set can suppress the interference signal in the received signal, and the demodulation capability of the local cell base station on the received signal can be improved.
According to the scheme, because the interference degrees of different interference signals to the received signal are probably different, the suppression effect of the interference signal in the received signal can be improved by acquiring the set containing the interference information corresponding to the communication resource positions where the different interference signals are located and then utilizing the set to balance the received signal.
Referring to fig. 2, fig. 2 is a second flowchart of an embodiment of the interference suppression method of the present application. As shown in fig. 1 and 2, step S12: determining an interference statistic information set by using a received signal, specifically comprising the following steps:
step S121: interference statistics for each received signal are obtained.
The received signal comprises a first received signal which is positioned at the position of the communication resource where the interference signal is positioned and a second received signal which is not positioned at the position of the communication resource where the interference signal is positioned. Each received signal refers to a signal received from each communication resource location. If the local cell includes multiple receiving antennas, each received signal is a set of communication resource positions of each antenna. Wherein, the interference statistical information is an interference covariance matrix.
Specifically, the formula for calculating the interference covariance matrix may be:
R nn,k ＝(Y k -H k S k )(Y k -H k S k ) H
wherein R is nn,k Refers to the interference covariance matrix, Y k Refers to the received signal at the Kth communication resource position in the receiving time slot of the local cell, H k Refers to the channel response at the Kth communications resource locationShould be, S k Refers to the local demodulation reference signal at the Kth communication resource location, (Y) k -H k S k ) H This means that the conjugate transpose operation is performed on the content in parentheses. The general calculation method can be referred to for the way of calculating the channel response at the kth communication resource location, which is not described herein again. Wherein, if there are multiple antennas in the cell, Y k May be the result of combining the received signals from multiple antennas on the kth communications resource location.
Step S122: average interference statistical information of each first received signal and average interference statistical information of each second received signal are obtained.
Before step S122 is executed, the following steps need to be executed: and determining the positions of the communication resources in which the different interference signals are positioned. Wherein the interference capabilities of different interfering signals are different. In the embodiment of the present disclosure, interference signals with the same interference capability are classified into one class. The determination of the interference capability may be based on a power determination of the interfering signal. In the embodiment of the present disclosure, the different interference signals include different signals sent by neighboring cells. Further, the interference signal refers to different signals transmitted by neighboring base stations. For example, the interference signal includes a cell-specific reference signal and a data signal transmitted by a neighboring cell. In general, the power of the cell-specific reference signal transmitted by the cell base station is higher than the power of the data signal, that is, the larger the interference of the cell-specific reference signal transmitted by the neighboring cell to the signal received by the cell is, the greater the interference capability of the cell-specific reference signal of the neighboring cell is, the greater the interference capability of the data signal is. Because different cell service types may be different, the subframe ratio of a cell may not be consistent with the ratio of a neighboring cell, which causes interference to the cell by a downlink signal of a neighboring cell base station, and a transmission signal of the neighboring cell has a higher power and a higher interference than an uplink reception signal of the cell, so that interference suppression needs to be performed on a signal transmitted by the neighboring cell.
In the embodiment of the present disclosure, the manner of determining the location of the communication resource where different interference signals are located may be to obtain configuration information of a neighboring cell. And the time sequences of the adjacent cell and the local cell are synchronous. That is to say, the embodiment of the present disclosure is applicable to the same frequency interference problem of the neighboring cells on the basis of the neighboring cell timing synchronization. Optionally, the neighbor cell is searched by starting the neighbor station monitoring, so as to obtain the configuration information of the neighbor cell. The time for starting the neighbor station to monitor and search the neighbor Cell may be to acquire configuration information of the neighbor Cell on the basis of detecting the configuration information of the neighbor Cell in the installation process of the base station and completing timing synchronization between cells, where the configuration information includes a Physical Cell Identifier (PCI), a subframe number, and a time slot number of the neighbor Cell. Here, the timing synchronization between cells may be performed by starting a neighboring station monitoring function, searching for a neighboring cell, and if the neighboring cell is searched, selecting a cell with the strongest signal with the searched cell for time synchronization. And then, acquiring the communication resource positions of different signals sent by the adjacent cell according to the configuration information of the adjacent cell. For example, the locations of the cell-specific reference signal and the data signal in the frequency domain may be calculated from the PCI of the neighbor cell. And specifically, the position of the cell-specific reference signal in which subframe is subjected to interference statistical information calculation is obtained according to the subframe number and the time slot number, that is, which is an uplink subframe of the neighboring cell and which is a downlink subframe of the neighboring cell can be judged according to the subframe number of the neighboring cell. The embodiment of the present disclosure takes a cell-specific reference signal sent by an interference signal as a neighboring cell as an example. By the above method, after the communication resource location where the cell specific reference signal sent by the neighboring cell is located is obtained, the communication resource location set where the cell specific reference signal of the neighboring cell is located can be obtained. Of course, if there is more than one neighboring cells, that is, there are more than two neighboring cells, the set of cell-specific reference signal locations is a set of communication resource locations where all cell-specific reference signals of multiple neighboring cells are located. Finally, recording the time slots of a plurality of cells needing interference suppression and configuring the time slots to be used for implementing the interference suppression method in future. The recording of the time slot configuration of a plurality of cells needing interference suppression is mainly to mark the communication resource positions of adjacent cells for sending different signals.
The average interference statistical information of the first received signals is an average value of the interference statistical information of all the first received signals, and the average interference statistical information of the second received signals is an average value of the interference statistical information of all the second received signals. That is, the interference statistical information corresponding to the communication resource locations where the non-interference signal and the interference signal are located are respectively averaged. Of course, if there are multiple types of interference signals, average interference statistical information corresponding to the communication resource locations of the various types of interference signals can be obtained respectively.
Specifically, the formula for calculating the average interference statistic of the first received signal may be:
wherein R is nn,A Is the average interference statistic information of the first received signal, N A The number of the communication resource positions where the cell dedicated reference signal is sent by the adjacent cell is referred to, and A refers to the communication resource position set where the cell dedicated reference signal is sent by the adjacent cell.
The formula for calculating the average interference statistics of the second received signal may be:
wherein R is nn,B And the average interference statistical information of the second received signal is obtained, wherein N is the number of the communication resource positions of the scheduling terminal in the cell, and B is the set of the communication resource positions of the scheduling terminal in the cell. That is, N is the number of communication resource locations where the same scheduling terminal currently receives the signal sent by the same scheduling terminal, and B is a set of communication resource locations where the same scheduling terminal currently receives the signal sent by the same scheduling terminal, that is, N and B are not fixed, the communication resource locations scheduled by the terminals at each time may be different, and if the currently received signal is less, B may be smaller, and N changes accordingly.
Of course, in the case that there are multiple interference signals, the average interference statistic information of the communication resource locations where the rest interference signals are located can be determined according to the above formula. And will not be described in detail herein.
Step S123: and combining the average interference statistical information of each received signal to obtain an interference statistical information set.
Specifically, the average interference statistical information of each received signal is combined, and the obtained interference statistical information set may be:
wherein the content of the first and second substances,
the set of interference statistics determined for the received signal is used.
In step S13, the formula for equalizing the received signal using the interference statistic information set may be:
wherein, x is a signal set after equalization, y is a signal set received by each communication resource position, H is a channel response set of each communication resource position, and I is a unit matrix. Where y comprises the signal received by each antenna.
The method used by the equalization formula is minimum mean square error equalization. The derivation process of the equalization formula is specifically to calculate a cost function between an estimated value of the receiving end to the original signal and a true value of the original signal, so that the cost function is minimum, which indicates that the equalization effect is better.
For simplicity, it is assumed that a recovery matrix G exists, such that the estimated values x — Gy, y refer to the signals received by each antenna. At this time, the estimated error is e ═ x — x, where x denotes the original signal transmitted by the terminal side. According to the minimum mean square error criterion, G is obtained so that
The value of (c) is minimal. Through calculation, the final product is
After the received signal is equalized, the equalized received signal is decoded according to the used communication protocol flow to obtain an original signal corresponding to the received signal.
According to the scheme, because the interference degrees of different interference signals to the received signal are probably different, the suppression effect of the interference signal in the received signal can be improved by acquiring the set containing the interference information corresponding to the communication resource positions where the different interference signals are located and then utilizing the set to balance the received signal. That is, by averaging the interference statistics of the communication resource locations with interference and averaging the interference statistics of the communication resource locations without interference, the purpose of interference suppression can be achieved.
The interference suppression method provided by the embodiment of the disclosure can be applied to broadband systems in the field of private network communication and public network communication. In other embodiments, it may be applied to a narrowband system. Therefore, the applicable scenario of the interference suppression method proposed in the embodiment of the present disclosure is not limited. The method is particularly suitable for various rapid deployment scenes in the field of private network communication, such as application scenes of emergency rescue, disaster relief, live event broadcasting and the like.
Wherein, the execution subject of the interference suppression method can be the base station, the server or other processing equipment. Certainly, in other embodiments, the main body of the interference suppression method may also be a terminal device, where the terminal device may be: user Equipment (UE), mobile devices, User terminals, cellular phones, cordless phones, Personal Digital Assistants (PDAs), handheld devices, computing devices, in-vehicle devices, wearable devices, and the like. In some possible implementations, the interference suppression method may be implemented by a processor invoking computer readable instructions stored in a memory.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an interference suppression device according to an embodiment of the present application. The interference suppression device 30 includes: a signal acquisition module 31, a calculation module 32 and an equalization module 33. A signal acquiring module 31, configured to acquire a received signal of the local cell; a calculating module 32, configured to calculate an interference statistic information set by using the received signals, where the interference statistic information includes interference statistic information corresponding to communication resource locations where different interference signals are located; and an equalizing module 33, configured to equalize the received signal by using the interference statistic information set to suppress an interference signal in the received signal.
According to the scheme, because the interference degrees of different interference signals to the received signal are probably different, the suppression effect of the interference signal in the received signal can be improved by acquiring the set containing the interference information corresponding to the communication resource positions where the different interference signals are located and then utilizing the set to balance the received signal.
The functions of each module refer to the embodiment of the interference suppression method, and are not described herein again.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present application. The base station 40 comprises a communication circuit 41 and a processor 42, and the processor 42 is connected to the communication circuit 41 and is configured to implement the steps in any of the interference suppression method embodiments described above.
The base station 40 processes the signal received by the communication circuit 41 according to the steps in any of the above interference suppression method embodiments, so as to suppress the interference signal in the received signal, and thus, can decode the processed signal to obtain a more accurate original signal. The original signal refers to a signal transmitted by the terminal side.
Specifically, the processor 42 may also be referred to as a CPU (Central Processing Unit). The processor 42 may be an integrated circuit chip having signal processing capabilities. The Processor 42 may also be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. In addition, the processor 42 may be commonly implemented by an integrated circuit chip.
According to the scheme, because the interference degrees of different interference signals to the received signal are probably different, the suppression effect of the interference signal in the received signal can be improved by acquiring the set containing the interference information corresponding to the communication resource positions where the different interference signals are located and then utilizing the set to balance the received signal.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of a computer-readable storage medium according to the present application. The computer readable storage medium 50 stores program instructions 51 executable by the processor, the program instructions 51 for implementing the steps in any of the interference suppression method embodiments described above. In one embodiment, the apparatus with storage function may be a storage chip in a terminal, a hard disk, or a removable hard disk or other readable and writable storage tool such as a flash disk, an optical disk, or the like, and may also be a server or the like.
According to the scheme, because the interference degrees of different interference signals to the received signal are probably different, the suppression effect of the interference signal in the received signal can be improved by acquiring the set containing the interference information corresponding to the communication resource positions where the different interference signals are located and then utilizing the set to balance the received signal.
In some embodiments, functions of or modules included in the apparatus provided in the embodiments of the present disclosure may be used to execute the method described in the above method embodiments, and specific implementation thereof may refer to the description of the above method embodiments, and for brevity, will not be described again here.
The foregoing description of the various embodiments is intended to highlight various differences between the embodiments, and the same or similar parts may be referred to each other, and for brevity, will not be described again herein.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a module or a unit is merely one type of logical division, and an actual implementation may have another division, for example, a unit or a component may be combined or integrated with another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in an electrical, mechanical or other form.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
Claims (11)
1. An interference suppression method, comprising:
acquiring a receiving signal of a local cell;
determining an interference statistical information set by using the received signals, wherein the interference statistical information set comprises interference statistical information corresponding to communication resource positions where different interference signals are located;
and utilizing the interference statistical information set to balance the received signals.
2. The method of claim 1, wherein the interference statistic is an interference covariance matrix.
3. The method of claim 1, wherein the determining a set of interference statistics using the received signal comprises:
acquiring the interference statistical information of each received signal; wherein the received signal comprises a first received signal located at a communication resource location of the interfering signal and a second received signal not located at the communication resource location of the interfering signal;
acquiring average interference statistical information of each first receiving signal and average interference statistical information of each second receiving signal, wherein the average interference statistical information of the first receiving signals is an average value of the interference statistical information of all the first receiving signals, and the average interference statistical information of the second receiving signals is an average value of the interference statistical information of all the second receiving signals;
and combining the average interference statistical information of each received signal to obtain the interference statistical information set.
4. The method of claim 3, wherein prior to said obtaining the average interference statistics for each of the first received signals and the average interference statistics for each of the second received signals, the method further comprises:
and determining the position of the communication resource of the different interference signals, wherein the interference capacities of the different interference signals are different.
5. The method of claim 4, wherein the different interfering signals comprise different signals transmitted by neighboring cells.
6. The method of claim 4, wherein the determining the location of the communication resource of the different interfering signal comprises:
acquiring configuration information of a neighboring cell;
and acquiring the communication resource positions of different signals sent by the adjacent cell according to the configuration information of the adjacent cell.
7. The method of claim 6, wherein the timing of the neighboring cell and the local cell is synchronized;
the obtaining of the configuration information of the neighboring cell includes:
and the cell searches the neighbor cell by starting neighbor station monitoring to obtain the configuration information of the neighbor cell.
8. The method of any of claims 1-7, wherein after equalizing the received signal, the method further comprises:
and decoding the equalized received signal according to a used communication protocol flow to obtain an original signal corresponding to the received signal.
9. An interference suppression apparatus, comprising:
a signal acquisition module, configured to acquire a received signal of a local cell;
a calculating module, configured to calculate an interference statistic information set using the received signal, where the interference statistic information includes interference statistic information corresponding to communication resource locations where different interference signals are located;
and the equalizing module is used for equalizing the received signals by utilizing the interference statistical information set so as to suppress interference signals in the received signals.
10. A base station comprising a processor and communication circuitry, the processor being coupled to the communication circuitry for implementing the method of any of claims 1 to 8.
11. A computer readable storage medium having stored thereon program instructions, characterized in that the program instructions, when executed by a processor, implement the method of any of claims 1 to 8.
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