CN115087012A

CN115087012A - Uplink signal detection method and device of flexible frame structure simulation system

Info

Publication number: CN115087012A
Application number: CN202210700349.0A
Authority: CN
Inventors: 曹艳霞; 王金石; 李福昌
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-09-20
Anticipated expiration: 2042-06-20
Also published as: CN115087012B

Abstract

The application discloses an uplink signal detection method and device of a flexible frame structure simulation system, relates to the technical field of communication, and is used for comprehensively and accurately determining the signal quality of an uplink signal received by a cell. The flexible frame structure simulation system includes a target cell and an interfering cell. The method comprises the following steps: determining a first interference value of a plurality of interference uplink signals to a first uplink signal and a second interference value of noise to the first uplink signal; determining an interference elimination factor of an interference cell according to a preset interference elimination factor library and an interference included angle of the interference cell, and calculating a third interference value of an interference downlink signal to a first uplink signal according to the interference elimination factor, signal transmitting power of the interference cell and link loss between the interference cell and a target cell; and accurately and comprehensively determining the signal-to-noise ratio of the first uplink signal according to the signal strength of the first uplink signal and the interference values of a plurality of interference sources such as the first interference value, the second interference value and the third interference value.

Description

Uplink signal detection method and device of flexible frame structure simulation system

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to an uplink signal detection method and device of a flexible frame structure simulation system.

Background

In a communication system having a Time Division Duplex (TDD) mode, a cell may use different time slots of the same frequency channel (i.e., carrier) to achieve transmission and reception of signals. Even if the cells allocate the uplink and downlink of the communication system to the same frequency spectrum by TDD technology. The uplink and downlink respectively occupy different time periods, so that the wireless resources can be fully used, and the asymmetric characteristics of different services are adapted.

In a communication system with TDD mode, different subframe configuration structures are defined, which may include, for example, DSUUU, DDSUU, and DDDSU. Where D denotes a Downlink slot (Downlink slot) refers to a slot for Downlink transmission. S denotes a Special slot (Special slot) which refers to a slot for downlink transmission or uplink transmission. U denotes an Uplink slot (Uplink slot) which refers to a slot for Uplink transmission. Therefore, the cell can flexibly select proper subframe structure configuration according to the uplink and downlink service volume born by the cell, thereby using the uplink and downlink bandwidth configured by the subframe structure to transmit services. However, when different terminals adopt different subframe configuration structures to transmit uplink signals to a cell, the uplink signals received by the cell are interfered by cross time slots. At this time, it is necessary to detect the uplink signal received by the cell to determine the signal quality of the uplink signal.

Disclosure of Invention

The application provides an uplink signal detection method and device of a flexible frame structure simulation system, which are used for comprehensively and accurately detecting an uplink signal received by a cell so as to determine the signal quality of the uplink signal.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, a method for detecting an uplink signal of a flexible frame structure simulation system is provided, where the flexible frame structure simulation system includes a target cell and an interfering cell, and a downlink signal sent by the interfering cell interferes with a first uplink signal sent by the target cell to a target terminal. The method comprises the following steps: determining a first interference value of uplink signals of a plurality of interference terminals to a first uplink signal and a second interference value of noise to the first uplink signal; the uplink signal sent by the interfering terminal generates interference to the first uplink signal. And determining an interference included angle of the interference cell, and determining a target interference terminal and a corresponding target interference elimination factor from a preset interference elimination factor library according to the interference included angle. The preset interference elimination factor library comprises interference included angles of a plurality of strong interference terminals and interference elimination factors corresponding to each interference included angle, and the target interference terminal is as follows: and the strong interference terminal with the smallest angle difference between interference included angles with the interference cell in the plurality of strong interference terminals, wherein the large-scale path loss between the strong interference terminal and the target cell is larger than a preset threshold value. And calculating a third interference value of the downlink signal of the interference cell to the first uplink signal according to the target interference elimination factor, the signal transmission power of the interference cell and the link loss between the interference cell and the target cell. And determining the signal-to-noise ratio of the first uplink signal according to the signal strength of the first uplink signal, the first interference value, the second interference value and the third interference value.

Based on the technical scheme provided by the application, when the terminal adopts a flexible frame structure to send the uplink signal to the cell, the uplink signal received by the cell from the terminal can be interfered by the downlink signal of the adjacent cell and the uplink signal of the terminal. Therefore, in the embodiment of the present application, the signal-to-noise ratio of the uplink signal from the terminal received by the cell may be calculated according to interference values (which may also be referred to as interference powers) of a plurality of interference sources (for example, a downlink signal of an interfering cell, noise, an uplink signal of an interfering terminal, and the like) which generate interference on the uplink signal from the terminal received by the cell. The signal-to-noise ratio of the signal can reflect the signal quality of the signal, so the technical scheme provided by the embodiment of the application can comprehensively and accurately evaluate the signal quality of the uplink signal received by the cell.

In one possible implementation manner, the plurality of interference terminals include a strong interference terminal and a weak interference terminal, and a large-scale path loss between the weak interference terminal and the target cell is smaller than a preset threshold. The "determining a first interference value of uplink signals of a plurality of interfering terminals to a first uplink signal" includes: calculating an interference value of an uplink signal of the strong interference terminal to a first uplink signal according to the signal transmitting power of the strong interference terminal, a channel matrix between a target cell and the strong interference terminal and a pre-coding matrix of the strong interference terminal; calculating an interference value of an uplink signal of the weak interference terminal to a first uplink signal according to the signal transmitting power of the weak interference terminal and the link loss from the target cell to the weak interference terminal, wherein the first interference value comprises: the interference value of the uplink signal of the strong interference terminal to the first uplink signal and the interference value of the uplink signal of the weak interference terminal to the first uplink signal.

In a possible implementation manner, the method for determining an interference included angle of an interfering cell specifically includes: rotating a connecting line of the target terminal and the target cell according to a preset direction by taking the position information of the target cell as a central point, so that the rotating connecting line of the target terminal and the target cell is superposed with the connecting line of the interference cell and the target cell; and determining an interference included angle of the interference cell according to the rotation angle of a connecting line of the target terminal and the target cell, wherein the interference included angle is greater than or equal to 0 degree and less than or equal to 180 degrees.

In a possible implementation manner, a third interference value of the uplink signal of the interfering terminal to the first uplink signal satisfies a first formula, where the first formula is: b3 ═ Σ _m βP _n /L _gn . Where B3 denotes a third interference value, beta denotes a target interference cancellation factor, P _n Signal transmission power, L, representing the m-th interfering cell _gn And representing the link loss between the mth interference cell and the target cell, wherein m represents the number of the interference terminals, m and n are positive integers, and n is less than or equal to m.

In a possible implementation manner, the signal-to-noise ratio of the first uplink signal satisfies a preset formula, where the preset formula is: SINR is S1/(S1+ B1+ B2+ B3); wherein, SINR is a signal-to-noise ratio of the first uplink signal, S1 is a signal strength of the first uplink signal, B1 is a first interference value, B2 is a second interference value, and B3 is a third interference value.

In a second aspect, a signal detection apparatus (hereinafter, for convenience of description, referred to as a signal detection apparatus) of a flexible frame structure simulation system is provided, where the flexible frame structure simulation system includes a target cell and an interfering cell, and a downlink signal sent by the interfering cell interferes with a first uplink signal sent by the target cell to a target terminal. The signal detection means may be a functional module for implementing the method of the first aspect or any possible design of the first aspect. The signal detection means may implement the functions performed in the above aspects or in each possible design, which functions may be implemented by hardware executing the corresponding software. The hardware or software comprises one or more modules corresponding to the functions. Such as: the signal detection device includes a determination unit and a processing unit.

The device comprises a determining unit, a judging unit and a processing unit, wherein the determining unit is used for determining a first interference value of uplink signals of a plurality of interference terminals to a first uplink signal and a second interference value of noise to the first uplink signal; the uplink signal sent by the interfering terminal generates interference to the first uplink signal.

And the determining unit is further used for determining an interference included angle of the interference cell, and determining a target interference terminal and a corresponding target interference elimination factor from a preset interference elimination factor library according to the interference included angle. The preset interference elimination factor library comprises interference included angles of a plurality of strong interference terminals and interference elimination factors corresponding to each interference included angle, and the target interference terminal is as follows: and the strong interference terminal with the smallest angle difference between interference included angles with the interference cell in the plurality of strong interference terminals, wherein the large-scale path loss between the strong interference terminal and the target cell is larger than a preset threshold value.

And the processing unit is used for calculating a third interference value of the downlink signal of the interference cell to the first uplink signal according to the target interference elimination factor, the signal transmission power of the interference cell and the link loss between the interference cell and the target cell.

And the processing unit is further configured to determine a signal-to-noise ratio of the first uplink signal according to the signal strength of the first uplink signal, the first interference value, the second interference value, and the third interference value.

The specific implementation manner of the signal detection apparatus may refer to the first aspect or a behavior function of the uplink signal detection method of the flexible frame structure simulation system provided by any possible design of the first aspect, and is not repeated here. Therefore, the signal detection apparatus of the flexible frame structure simulation system may achieve the same advantageous effects as the first aspect or any possible design of the first aspect.

In one possible implementation manner, the multiple interference terminals include a strong interference terminal and a weak interference terminal, and a large-scale path loss between the weak interference terminal and the target cell is smaller than a preset threshold. A determination unit, specifically configured to: calculating an interference value of an uplink signal of the strong interference terminal to a first uplink signal according to the signal transmitting power of the strong interference terminal, a channel matrix between a target cell and the strong interference terminal and a pre-coding matrix of the strong interference terminal; calculating an interference value of an uplink signal of the weak interference terminal to a first uplink signal according to the signal transmitting power of the weak interference terminal and the link loss from the target cell to the weak interference terminal, wherein the first interference value comprises: the interference value of the uplink signal of the strong interference terminal to the first uplink signal and the interference value of the uplink signal of the weak interference terminal to the first uplink signal.

In a possible implementation manner, the determining unit is specifically configured to: rotating a connecting line of the target terminal and the target cell according to a preset direction by taking the position information of the target cell as a central point, so that the rotating connecting line of the target terminal and the target cell is superposed with the connecting line of the interference cell and the target cell; and determining an interference included angle of the interference cell according to the rotation angle of a connecting line of the target terminal and the target cell, wherein the interference included angle is greater than or equal to 0 degree and less than or equal to 180 degrees.

In a possible implementation manner, a third interference value of the downlink signal of the interfering cell to the first uplink signal satisfies a first formula, where the first formula is: b3 ∑ Σ _m βP _n /L _gn . Where B3 denotes a third interference value, beta denotes a target interference cancellation factor, P _n Signal transmission power, L, representing the m-th interfering cell _gn And representing the link loss between the mth interference cell and the target cell, wherein m represents the number of the interference terminals, m and n are positive integers, and n is less than or equal to m.

In a third aspect, a signal detection apparatus (hereinafter, simply referred to as a signal detection apparatus for convenience of description) of a flexible frame structure simulation system is provided. The signal detection means may implement the functions performed in the above aspects or in each possible design, which may be implemented by hardware, such as: in one possible design, the signal detection device may include: a processor and a communication interface, the processor being operable to enable the signal detection apparatus to carry out the functions referred to in the first aspect above or in any one of the possible designs of the first aspect, for example: and the processor determines an interference elimination factor of the interference terminal according to a preset neural network algorithm.

In yet another possible design, the signal detection device may further include a memory for storing computer-executable instructions and data necessary for the signal detection device. When the signal detection device is running, the processor executes the computer-executable instructions stored in the memory, so as to enable the signal detection device to execute the method for detecting an uplink signal of the flexible frame structure simulation system according to the first aspect or any one of the possible designs of the first aspect.

In a fourth aspect, a computer-readable storage medium is provided, which may be a readable non-volatile storage medium, and the computer-readable storage medium stores a computer instruction or a program, which when executed on a computer, enables the computer to execute the method for detecting an uplink signal of a flexible frame structure simulation system according to the first aspect or any one of the possible designs of the above aspects.

In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, enable the computer to perform the method for detecting an uplink signal of a flexible frame structure simulation system according to the first aspect or any one of the above possible designs.

A sixth aspect provides a chip system, where the chip system includes a processor and a communication interface, and the chip system may be configured to implement a function performed by the signal detection apparatus of the flexible frame structure simulation system in the first aspect or any possible design of the first aspect, for example, where the processor is configured to determine the signal strength of the first uplink signal received by the target terminal. In one possible design, the system-on-chip further includes a memory to hold program instructions and/or data. The chip system may be formed by a chip, and may also include a chip and other discrete devices, without limitation.

The technical effects brought by any one of the design manners of the second aspect to the sixth aspect can be referred to the technical effects brought by the first aspect, and are not described in detail.

Drawings

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another communication system according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a signal detection apparatus 300 according to an embodiment of the present disclosure;

fig. 4 is a schematic flowchart of an uplink signal detection method of a flexible frame structure simulation system according to an embodiment of the present application;

fig. 5 is a schematic flowchart of a method for constructing a preset interference cancellation factor library according to an embodiment of the present application;

fig. 6 is a schematic diagram of an interference included angle of an interference terminal according to an embodiment of the present application;

fig. 7 is a schematic flowchart of an uplink signal detection method of another flexible frame structure simulation system according to an embodiment of the present application;

fig. 8 is a schematic diagram of an interference angle of an interfering cell according to an embodiment of the present disclosure;

fig. 9 is a schematic flowchart of an uplink signal detection method of another flexible frame structure simulation system according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of another signal detection apparatus 100 according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present disclosure better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are capable of operation in sequences other than those illustrated or otherwise described herein. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the embodiments of the application, as detailed in the appended claims.

It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, and/or components.

In order to ensure that the constructed cell can bring the maximum throughput gain, before the actual networking, the communication quality of the planned communication system can be evaluated and analyzed in a simulation mode. For example, for a New Radio (NR) cell in a communication system with a TDD model, the NR cell transmits data using a millimeter wave frequency band. However, the penetration performance of the millimeter wave frequency band is poor, and under the environment with good isolation, the NR cell may transmit data in a flexible frame manner using bandwidths corresponding to different subframe configuration structures. However, when the NR cell performs signal transmission with the terminal in a flexible frame manner, a problem of cross slot interference is introduced, which easily causes a decrease in system capacity.

Generally, the signal quality of the uplink signal received by the cell can be determined by the signal-to-noise ratio. For example, the data throughput of a cell can be calculated by mapping the block error rate of an uplink signal by the signal-to-noise ratio. Therefore, in order to evaluate the network quality of the communication system, the uplink signal received by the cell may be detected through system simulation before networking, so as to determine the signal-to-noise ratio of the uplink signal received by the cell.

In a simulation scenario, when a cell and a terminal use a same-frame structure for signal transmission, an uplink signal sent by the terminal to the cell may be interfered by a downlink signal sent by an interfering cell in a same timeslot. In order to determine the uplink signal received by a cell from a terminal (referred to as a target terminal for distinguishing from an interfering terminal), the uplink signal received by the cell from the target terminal may be calculated according to the following formula i. The cell is a serving cell of the target terminal.

Where y represents a signal when an uplink signal transmitted by the target terminal reaches the target cell (i.e., the serving cell of the target terminal). P ₁ Representing the signal transmission power of the target terminal. H _1s Representing the channel matrix between the target terminal and the target cell. The order of the channel matrix is Np × Nb. The elements in the channel matrix represent the frequency domain channel response between the antenna of the target terminal and the antenna of the target cell. Np is the number of antennas of the target terminal and Nb is the number of antennas of the target cell. W ₁ Representing the precoding matrix of the target terminal. The order of the precoding matrix is Nb × M1. M1 is the number of signal streams of the uplink signal transmitted by the target terminal. x is the number of ₁ ＝(x _1.1 ，x _1.2 ，…，x _1.M ) ^T And the normalized vector of the useful signal transmitted by the target terminal. P is _i Representing the signal transmit power of a strongly interfering terminal. H _1g Representing the channel matrix between the strong interfering terminal and the target cell. W is a group of _i And representing the precoding matrix of the ith strong interference terminal. i is a positive integer. x is the number of _i ＝(x ₁ ，x ₂ ，…，x _Mj ) ^T A normalized vector representing the signal transmitted by a strong interfering terminal. z is noise, z ═ z (z) ₁ ，z ₂ ，…，z _Nr ) ^T . z is independentlyDistributed CN (0, sigma) ² )。σ ² Is the variance of the noise. P _w Representing the signal transmit power of a weakly interfering terminal. L is _ig Representing the link loss between the target cell and the weak interfering terminal. The link loss may include a large scale path loss and antenna gain. The calculation method of the large-scale path loss and the antenna gain can refer to the prior art, and is not described in detail.

It should be noted that the interfering cell may refer to a terminal that generates interference on an uplink signal received by the target cell. The interfering terminal and the target terminal may both access to the same serving cell, or may be terminals accessing to the interfering cell. The interfering cells may include strong interfering cells and weak interfering cells. The interfering terminals may include strong interfering terminals and weak interfering terminals.

For example, as shown in fig. 1, a communication system is provided in an embodiment of the present application. The communication system may include a plurality of cells (e.g., cell 1 and cell 2) and a plurality of terminals (e.g., terminal 1 and terminal 2). Each of the plurality of cells may serve a terminal accessing the cell. For example, cell 1 may serve terminal 1 and cell 2 may serve terminal 2.

For terminal 1, cell 1 may be referred to as a serving cell. When the terminal 1 and the terminal 2 respectively transmit uplink signals to corresponding serving cells using the same frame structure and the same time slot, the uplink signal transmitted by the terminal 2 may generate interference on the uplink signal transmitted by the terminal 1 to the cell 1. At this time, terminal 2 may be referred to as an interfering terminal for cell 1 and terminal 1.

In one example, terminal 2 may be referred to as a strong interference terminal if the large scale path loss from terminal 2 to cell 1 is greater than or equal to a preset threshold; terminal 2 may be referred to as a weak interfering terminal if the large scale path loss from terminal 2 to cell 1 is less than a preset threshold.

Or, if the cell 1 has multiple interfering terminals, sorting may be performed according to the large-scale path loss from the multiple interfering terminals to the cell 1, and the first N interfering terminals are used as strong interfering terminals of the cell 1, and the remaining interfering terminals are used as weak interfering terminals of the cell 1. N is a positive integer less than the number of interfering terminals.

In yet another example, if the large scale path loss from cell 2 to cell 1 is greater than or equal to a preset threshold, cell 2 may be referred to as a strong interference cell of cell 1; if the large scale path loss from cell 2 to cell 1 is less than a preset threshold, cell 2 may be referred to as a cell 1 weak interfering cell.

Or, if the terminal 1 has multiple interfering cells, the terminal may be sorted according to the large-scale path loss from the multiple interfering cells to the cell 1, and the first N interfering cells are used as strong interfering cells of the cell 1, and the remaining interfering cells are used as weak interfering cells of the cell 1. N is a positive integer less than the number of interfering cells.

At the signal receiving end, in order to reduce distortion of the signal and reduce the combined effect of inter-symbol interference (ISI) and noise on the signal. A signal receiving end (e.g., a target cell) may perform linear detection on the received signal to obtain a detected signal (i.e., a recovered original signal).

For example, the target cell may detect the received uplink signal by using a preset linear detection algorithm. The preset linear detection algorithm may be Zero Forcing (ZF), Minimum Mean Square Error (MMSE), etc., and of course, may also be other linear detection algorithms, which are not limited.

In an example, the target cell may perform linear detection on the received uplink signal by using a preset detection matrix, so as to obtain a detected uplink signal.

For example, the detection matrix is preset to be D, and the order of D is M1 × Np. The detected uplink signal is:

wherein the content of the first and second substances,

indicating the received uplink signal of the target cell, the uplink signal comprises useful signals and inter-streamAn interfering signal.

Representing interference signals of other terminals in the group of multi-user (MU) paired terminals and interference signals of strongly interfering terminals. The MU pairing terminal group comprises a target terminal and one or more interference terminals. Dz represents noise interference.

Representing the interfering signal of a weakly interfering terminal.

For convenience of description, the detected downlink signal may be transformed into:

wherein the content of the first and second substances,

for any signal flow (for example, the mth signal flow) in the uplink signals received by the target cell, the linearly detected signal of the mth signal flow is:

wherein A is _m Is the mth row element of a. B is _im Is B _i Row m elements of (1).

The signal-to-noise ratio of the mth signal is:

wherein A is _mj Row m and column j of a. B is _imj Is B _i Row m and column j. D _mj Row m and column j of D.

In another simulation scenario, when a cell and a terminal use a flexible frame structure for signal transmission, a downlink signal sent by the cell is interfered by not only a downlink signal of an interfering cell in the same time slot, but also an uplink signal of the interfering terminal.

For example, as shown in fig. 2, when the interfering cell transmits a downlink signal to the interfering terminal, the downlink signal may be received by the target cell. When the time slot resources used by the interfering cell and the target cell are the same, the downlink signal interferes with the uplink signal received by the target cell. Meanwhile, the downlink signal sent by the interfering cell to the interfering terminal also interferes with the uplink signal sent by the target terminal.

In view of this, an embodiment of the present application provides a method for detecting an uplink signal of a flexible frame structure simulation system, where when a terminal sends an uplink signal to a cell by using a flexible frame structure, the uplink signal received by the cell from the terminal may be interfered by a downlink signal of an adjacent cell and an uplink signal of an interfering terminal. Based on this, in the embodiment of the present application, the signal-to-noise ratio of the uplink signal from the terminal received by the cell may be calculated according to interference values (which may also be referred to as interference powers) of a plurality of interference sources (for example, a downlink signal of an interfering cell, noise, an uplink signal of an interfering terminal, and the like) which generate interference on the uplink signal from the terminal received by the cell. The signal-to-noise ratio of the signal can reflect the signal quality of the signal, so the technical scheme provided by the embodiment of the application can comprehensively and accurately evaluate the signal quality of the uplink signal received by the cell.

It should be noted that the communication systems shown in fig. 1 and 2 are both communication systems constructed by simulation equipment through simulation. The cells and the terminals in fig. 1 and 2 are in the same simulation system. The method in the embodiment of the application simulates the actual communication environment through simulation, so that the signal-to-noise ratio of the downlink signal of the cell is obtained. Therefore, when networking is carried out subsequently, communication engineering personnel can adjust or optimize the cell to be planned according to the simulation result.

The method provided by the embodiment of the application is described in detail below with reference to the attached drawings.

It should be noted that the network system described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation to the technical solution provided in the embodiment of the present application, and as a person having ordinary skill in the art knows that along with the evolution of the network system and the appearance of other network systems, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

In one example, the present application also provides a signal detection apparatus, which may be used to perform the method of the present application. For example, the signal detection device may be an emulation device, or may be a device in an emulation device. The signal detection device may be provided with simulation software which may be used to perform a simulation process.

For example, as shown in fig. 3, a schematic diagram of a signal detection apparatus 300 according to an embodiment of the present application is provided. The signal detection device 300 may include a processor 301, a communication interface 302, and a communication line 303.

Further, the signal detection apparatus 300 may further include a memory 304. The processor 301, the memory 304 and the communication interface 302 may be connected by a communication line 303.

The processor 301 is a CPU, a general-purpose processor, a Network Processor (NP), a Digital Signal Processor (DSP), a microprocessor, a microcontroller, a Programmable Logic Device (PLD), or any combination thereof. The processor 301 may also be other devices with processing function, such as a circuit, a device or a software module, without limitation.

A communication interface 302 for communicating with other devices or other communication networks. The communication interface 302 may be a module, a circuit, a communication interface, or any device capable of enabling communication.

A communication line 303 for transmitting information between the respective components included in the signal detection apparatus 300.

A memory 304 for storing instructions. Wherein the instructions may be a computer program.

The memory 304 may be a read-only memory (ROM) or other types of static storage devices that can store static information and/or instructions, a Random Access Memory (RAM) or other types of dynamic storage devices that can store information and/or instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disc storage medium or other magnetic storage devices, and the like, without limitation.

It is noted that the memory 304 may exist separately from the processor 301 or may be integrated with the processor 301. The memory 304 may be used for storing instructions or program code or some data or the like. The memory 304 may be located inside the signal detection apparatus 300, or may be located outside the signal detection apparatus 300, which is not limited. The processor 301 is configured to execute the instructions stored in the memory 304 to implement the uplink signal detection method of the flexible frame structure simulation system according to the following embodiments of the present application.

In one example, the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in fig. 3.

As an alternative implementation, the signal detection apparatus 300 includes a plurality of processors, for example, the processor 307 may be included in addition to the processor 301 in fig. 3.

As an alternative implementation, the signal detection apparatus 300 further includes an output device 305 and an input device 306. Illustratively, the input device 306 is a keyboard, mouse, microphone, or joystick-like device, and the output device 305 is a display screen, speaker (spaker), or like device.

It should be noted that the signal detection apparatus 300 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device with a similar structure as that in fig. 3. Further, the constituent structure shown in fig. 3 is not limited, and may include more or less components than those shown in fig. 3, or a combination of some components, or a different arrangement of components, in addition to those shown in fig. 3.

In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.

In addition, acts, terms, and the like referred to between the embodiments of the present application may be mutually referenced and are not limited. In the embodiment of the present application, the name of the message exchanged between the devices or the name of the parameter in the message, etc. are only an example, and other names may also be used in the specific implementation, which is not limited.

It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

The method for detecting an uplink signal of a flexible frame structure simulation system according to the embodiment of the present application is described below with reference to a network architecture shown in fig. 2.

It should be noted that, as shown in fig. 4, the method provided by the embodiment of the present application includes a first simulation phase and a second simulation phase.

In the first simulation stage, the simulation device may construct a preset interference cancellation factor library. In the second simulation phase, the simulation device may perform the signal detection method in the embodiment of the present application. For example, the simulation device may determine a target interference cancellation factor according to an interference included angle of the interfering cell and a preset interference cancellation factor library, and calculate an interference value of the interfering cell according to the target interference cancellation factor and calculate interference values of the multiple interfering cells and the noise in a simulation manner. And then the simulation equipment can calculate the signal to noise ratio of the uplink signal received by the target cell from the target terminal through a plurality of interference values. The following describes the simulation preparation phase and the simulation execution phase.

The first and the second simulation stages are the first simulation stage,

as shown in fig. 5, the method for constructing the preset interference cancellation factor library according to the embodiment of the present application may be S501 and S502.

S501, determining interference elimination factors and interference included angles of the strong interference terminals through simulation.

The strong interference terminal may refer to the above description, and is not described in detail. The interference cancellation factor may be used to represent an interference degree of an uplink signal sent by the strong interference terminal to a cell to be detected (i.e., a target cell) receiving the uplink signal. The interference cancellation factor is greater than 0 and less than 1.

In one example, in the simulation, for a detected cell, the uplink signal received by the detected cell may be:

the uplink strong may refer to a strong interference terminal. The uplink weak may refer to a weak interference terminal. P _i Representing the signal transmission power of the ith strongly interfering terminal. i is a positive integer. H _1g Representing the channel matrix between the ith strong interfering terminal and the target cell. W _i And representing the precoding matrix of the ith strong interference terminal. x is the number of _i And the normalized vector represents the useful signal sent by the ith strong interference terminal.D denotes a detection matrix. P is _w Representing the signal transmission power of the mth weakly interfering terminal. w is a positive integer. L is _1g Representing the link loss between the mth weakly interfering terminal and the target cell.

It should be noted that, the determination method of the strong interference cell and the weak interference cell may refer to the determination method of the strong interference terminal and the weak interference terminal, which is not described in detail.

In a possible implementation manner, for the ith strong interference terminal, note is made

Interference elimination factor of the ith strong interference terminal

q represents an element of the q-th row of C, and j represents an element of the j-th column of C.

In another possible implementation manner, as shown in fig. 6, for the ith strong interference terminal (denoted as interference terminal i), the interference included angle of the interference terminal i may be an included angle between a connection line between the interference terminal i and the target cell and a connection line between the target cell and the target terminal.

In an example, the simulation device may rotate the connection line between the target cell and the target terminal in a preset direction with the target cell as a central point until the connection line between the target cell and the target terminal coincides with the connection line between the interfering terminal i and the target cell, so as to obtain a rotation angle of the connection line between the target cell and the target terminal. The simulation device can determine the interference included angle of the interference terminal i according to the rotation angle. The preset direction may be set as required, and may be, for example, a clockwise direction or a counterclockwise direction.

For example, the interference angle of the interfering terminal i satisfies the following formula two.

Wherein, theta _i Representing the interference angle of interfering terminal i. Alpha is alpha _i Indicating connection of target cell and target terminalThe angle of rotation of the wire.

S502, constructing a preset interference elimination factor library according to the interference elimination factors and the interference included angles of the strong interference terminals.

The preset interference cancellation factor library may include interference included angles of a plurality of strong interference terminals and an interference cancellation factor corresponding to each interference included angle.

In one example, the predetermined interference cancellation factor library may be as shown in table 1. Table 1 includes interference angles and interference cancellation factors of 15 strong interference cells.

TABLE 1

It should be noted that the data in table 1 above are only exemplary. The number of terminals and the interference angle in the table can be simulated as required.

Based on the above S501 and S502, in the pre-simulation stage, a preset interference cancellation factor library may be constructed according to the interference included angles and the interference cancellation factors of the multiple strong interference terminals. Therefore, the interference elimination factor of the interference cell can be determined quickly and conveniently according to the interference included angle of the interference cell and the preset interference elimination factor library.

And the second simulation stage.

As shown in fig. 7, the present application provides a method for detecting an uplink signal of a flexible frame structure simulation system, where the method includes:

s701, determining a first interference value of uplink signals of a plurality of interference terminals to the first uplink signal and a second interference value of noise to the first uplink signal.

The first uplink signal is an uplink signal sent by the target terminal to the target cell. The target cell may be the target cell in fig. 2. The target terminal may be the target terminal in fig. 2. The interfering cell may be cell 2 in fig. 2.

In one example, the plurality of interfering terminals may be classified into strong interfering terminals and weak interfering terminals according to a large scale path loss between the interfering terminal and the target cell. The strong interfering terminal and the weak interfering terminal may refer to the above description, and are not described in detail. The noise may refer to an interference signal other than the interfering cell and the interfering terminal.

The first interference value may be a sum of an interference value of a downlink signal of the strong interference terminal to the first uplink signal and an interference value of a downlink signal of the weak interference terminal to the first uplink signal.

In an example, the simulation device may calculate an interference value of the uplink signal of the strong interference terminal to the first uplink signal according to the signal transmission power of the strong interference terminal, the channel matrix between the target cell and the strong interference terminal, and the precoding matrix of the strong interference terminal.

For example, the interference value of the uplink signal of the strong interference terminal to the first uplink signal may satisfy formula three.

Bq＝∑ _{i ∈ strong downlink} ∑ _j P _i |DH _1g W _i | ² Formula III

Wherein, Bq represents the interference value of the uplink signal of the strong interference terminal to the first uplink signal. P _i And the signal transmission power used by the uplink signal sent by the ith strong interference terminal is represented. H _1g Representing the channel matrix between the ith strong interfering terminal and the target cell. W _i And representing the precoding matrix of the ith strong interference terminal. j is the number of the strong interference terminals, i and j are positive integers, and i is not more than j.

In yet another example, the simulation device may calculate an interference value of the uplink signal of the weak interference terminal to the first uplink signal according to the signal transmission power of the weak interference terminal and the link loss of the weak interference terminal to the target cell.

Wherein the link loss L between the weak interference terminal and the target cell _ug ＝PL _ug -G _g -G _u 。PL _ug Representing large scale path loss. G _u Representing the antenna gain of a weakly interfering terminal. G _g Representing the antenna gain of the target cell. The calculation method of the antenna gain can refer to the prior art.

For example, the interference value of the uplink signal of the weak interference terminal to the first uplink signal may satisfy formula four.

Br＝∑ _{i e uplink weak} ∑ _j |D| ² P _w /L _ug Formula four

And Br represents the interference value of the uplink signal of the ith weak interference terminal to the first uplink signal. P _w And the signal transmission power used by the ith weak interference terminal for sending the uplink signal is represented. j is the number of the weak interference terminals, i and j are positive integers, and i is not more than j.

It should be noted that, when the number of the strong interference terminals and the weak interference terminals is multiple, the interference value of the strong interference terminal to the first uplink signal may refer to a sum of interference values of the multiple strong interference terminals to the first uplink signal. The interference value of the weak interfering terminal on the first uplink signal may refer to a sum of interference values of a plurality of weak interfering terminals on the first uplink signal.

In yet another example, the second interference value of the noise to the first uplink signal may satisfy formula five.

B2＝∑ _j |D| ² σ ² Formula five

Where B2 denotes a second interference value. j is the amount of noise. j is a positive integer.

S702, determining an interference angle of the interference cell, and determining a target interference elimination factor from a preset interference elimination factor library according to the interference angle of the interference cell.

The downlink signal sent by the interfering cell may generate interference to the first uplink signal. For example, the interfering cell may be the interfering cell in fig. 2.

In one possible implementation manner, as shown in fig. 8, for a jth interfering cell (denoted as an interfering cell j), an interference included angle of the interfering cell j may be an included angle between a connection line of the interfering cell j and a target cell and a connection line of the target cell and a target terminal.

In an example, the simulation device may rotate the connection line between the target cell and the target terminal in a preset direction with the target cell as a center point until the connection line between the target cell and the target terminal coincides with the connection line between the interference terminal j and the target cell, so as to obtain a rotation angle of the connection line between the target cell and the target terminal. The simulation device may determine the interference included angle of the interfering cell j according to the rotation angle.

For example, the interference angle of the interfering cell j satisfies the following formula six.

Wherein, theta _j Representing the interference angle of interfering cell j. Alpha is alpha _j Indicating the rotation angle of the connection between the target cell and the target terminal.

In another possible implementation manner, as shown in fig. 8, the simulation device determines that the interference angle of the interfering cell is 35 °. With the table 1, the simulation device may calculate an angle difference between the interference cell and each interference included angle in the table 1 to obtain a plurality of angle differences. In this way, the simulation device may use the terminal with the smallest angle difference value as the target interference terminal, and use the interference cancellation factor of the target interference terminal as the target interference cancellation factor. For example, the angle difference between the interference angle of the interfering cell and the interference angle of the terminal 5 in table 1 is 2 °, and the angle difference between the interference angle of the interfering cell and the interference angle of the terminal 5 is the minimum value of the plurality of angle differences. That is, the target interference cancellation factor is the interference cancellation factor (0.35) corresponding to the terminal 5.

It should be noted that, when multiple minimum values exist in multiple angle difference values, the simulation device may use the terminals corresponding to the multiple angle difference values as target interference terminals, and determine the target interference cancellation factor according to the interference cancellation factors corresponding to the multiple target terminals. For example, the target interference cancellation factor may be an average value of a plurality of interference cancellation factors, or may be an intermediate value of the plurality of interference cancellation factors, or may be any one of the plurality of interference cancellation factors. Without limitation.

S703, calculating a third interference value of the downlink signal of the interference cell to the first uplink signal according to the target interference elimination factor, the signal transmission power of the interference cell and the link loss between the interference cell and the target cell.

The downlink signal of the interfering cell may refer to a downlink signal sent by the interfering cell to a serving terminal, and a time slot used by the interfering cell to send the downlink signal is the same as a time slot used by the target terminal to send the first uplink signal. The interfering cells may also be referred to as cross interfering cells.

Wherein the link loss L between the interfering cell and the target cell _1i ＝PL _ui -G _g -G _i 。PL _ui Representing the large scale path loss between the target cell and the interfering cell. G _i Representing the antenna gain of the interfering cell.

In one example, the third interference value satisfies formula seven.

B3＝∑ _{i belongs to the uplink} ηP _i /L _1i Formula seven

Where B3 denotes a third interference value. η represents the target interference cancellation factor. P _i Representing the signal transmission power of the interfering cell.

S804, determining the signal-to-noise ratio of the first uplink signal according to the signal strength of the first uplink signal, the first interference value, the second interference value and the third interference value.

The signal strength of the first uplink signal may refer to the signal strength of the uplink signal received by the target cell from the target terminal.

In one example, the first uplink signal received by the target cell from the target terminal may be an uplink signal sent by the target terminal to the target cell in response to an input instruction in the simulation environment. Accordingly, in the same simulation environment, the target cell may receive the first uplink signal from the target terminal.

It should be noted that, in the embodiment of the present application, the target cell, the interfering cell, the target terminal, and the interfering terminal are all in the same simulation environment. The interaction between cells and the interaction between signals between the cells and the terminal are the interaction of simulation signals. Signals between the target cell and the target terminal and signals between the interference cell and the interference terminal are analog signals. The analog signal may be generated by the emulation device in response to an input command. In this way, the simulation device can acquire the signals sent by each cell and each terminal and the received signals.

Further, after receiving the uplink signal from the target terminal, the target cell needs to perform linear detection to obtain the original downlink signal (i.e., the first uplink signal).

In one example, to obtain the original uplink signal, the simulation device may establish a channel matrix between the target terminal and the target cell through simulation, and obtain a precoding matrix of the target terminal. The simulation device may then determine the channel matrix H between the target terminal and the target cell _1s And the precoding matrix of the target terminal determines the signal when the uplink signal sent by the target terminal reaches the target cell. Furthermore, the simulation device may perform linear detection on the signal to obtain a first uplink signal from the target terminal received by the target cell.

The method for establishing the channel matrix between the target terminal and the target cell may refer to the prior art and is not described in detail. Precoding matrix W of target terminal ₁ The precoding matrix may be pre-configured for the target terminal, and is related to antenna configuration information of the target terminal. Alternatively, the precoding matrix of the target terminal may be configured for the target terminal through simulation.

For example, the uplink signal sent by the target terminal may arrive at the target cell as

The simulation device may perform linear detection on the signal according to a preset detection algorithm or a preset detection matrix to obtain an uplink signal from the target terminal received by the target cell. For example, the linear matrix may be the detection matrix D described above. The uplink signal from the target terminal received by the target cell is

Further, after obtaining the first uplink signal from the target terminal received by the target cell, the simulation device may determine the signal strength of the first uplink signal according to the first uplink signal.

And the signal strength of the first uplink signal satisfies the formula eight.

S1＝P|DH _1s W ₁ | ² Equation eight

Wherein, S1 is the signal strength of the first uplink signal received by the target cell from the target terminal, and P is the signal transmission power used by the target terminal to send the uplink signal to the target cell.

In one example, the signal-to-noise ratio of the first uplink signal satisfies formula nine.

SINR is S1/(S1+ B1+ B2+ B3) formula nine

Wherein, the SINR is a signal-to-noise ratio of the first uplink signal.

Based on the technical solution shown in fig. 8, when the terminal sends the uplink signal to the cell by using the flexible frame structure, the uplink signal from the terminal received by the cell may be interfered by the downlink signal of the neighboring cell and the uplink signal of the interfering terminal. Therefore, in the embodiment of the present application, the signal-to-noise ratio of the uplink signal from the terminal received by the cell may be calculated according to interference values (which may also be referred to as interference powers) of a plurality of interference sources (for example, a downlink signal of an interfering cell, noise, an uplink signal of an interfering terminal, and the like) which generate interference on the uplink signal from the terminal received by the cell. Because the signal-to-noise ratio of the signal can reflect the signal quality of the signal, the technical scheme provided by the embodiment of the application can comprehensively and accurately evaluate the signal quality of the uplink signal received by the terminal.

In a possible embodiment, as shown in fig. 9, an embodiment of the present application provides a method for detecting an uplink signal of a flexible frame structure simulation system, where the method includes S901 to S910.

S901, establishing a channel matrix between each terminal and a service cell and a strong interference cell.

S901 may refer to the description of S804, which is not repeated.

S902, calculating link loss between the target cell and each interference cell.

S902 may refer to the description of S802, which is not repeated herein.

And S903, determining the cell which uses the same time slot resource as the target cell.

And the cell which uses the same time slot resource as the target cell is an interference cell.

In a possible implementation manner, the simulation device may determine, according to the timeslot resource configured by the simulation system for each cell, a terminal that has the same timeslot resource as that used by the target cell. The slot resource may refer to an uplink slot resource. That is, when the target cell receives the uplink signal using the uplink timeslot resource at a certain time, the interfering cell also receives the uplink signal using the same uplink timeslot resource at the certain time.

And S904, when the interference cell uses the downlink time slot resource, taking the cell using the downlink time slot resource in the interference cell as a cross interference cell.

S905, when the interference cell does not use the downlink time slot resource, determining whether the interference terminal and the target cell establish a channel matrix.

The interference cell not using the downlink timeslot resource means that the interference cell currently transmits a downlink signal.

In a possible implementation manner, the simulation device may determine and identify the strong interference terminal and the weak interference terminal at a simulation start stage. Therefore, the simulation equipment can determine whether the interference terminal establishes a channel matrix with the target cell according to the identifier of the interference terminal.

S906, when the channel matrix is established between the interference terminal and the target cell, the interference terminal is taken as a strong interference terminal.

And S907, constructing a preset interference elimination factor library.

S907 may refer to S501 and S502, which are not described in detail.

S908, determining an interference cancellation factor of the cross interference terminal according to the preset interference cancellation factor library.

S908 can refer to the description of S802, which is not repeated herein.

S909, when the interfering terminal and the target cell do not establish a channel matrix, the interfering terminal is regarded as a weak interfering terminal.

S910, calculating the signal-to-noise ratio of the uplink signal received by the target cell.

S910 may refer to the description of S804, which is not repeated.

Based on the technical scheme shown in fig. 9, when the terminal sends the uplink signal to the cell by using the flexible frame structure, the uplink signal from the terminal received by the cell may be interfered by the downlink signal of the neighboring cell and the uplink signal of the interfering terminal. Therefore, in the embodiment of the present application, the signal-to-noise ratio of the uplink signal from the terminal received by the cell may be calculated according to interference values (which may also be referred to as interference powers) of a plurality of interference sources (for example, a downlink signal of an interfering cell, noise, an uplink signal of an interfering terminal, and the like) which generate interference on the uplink signal from the terminal received by the cell. Because the signal-to-noise ratio of the signal can reflect the signal quality of the signal, the technical scheme provided by the embodiment of the application can comprehensively and accurately evaluate the signal quality of the uplink signal received by the terminal.

All the schemes in the above embodiments of the present application can be combined without contradiction.

In the embodiment of the present application, the signal detection apparatus may be divided into the functional modules or the functional units according to the above method examples, for example, each functional module or functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module may be implemented in a form of hardware, or may be implemented in a form of a software functional module or a functional unit. The division of the modules or units in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

In the case of dividing each functional module according to each function, fig. 10 shows a schematic structural diagram of a signal detection apparatus 100, and the signal detection apparatus 100 can be used for executing the functions related to the simulation device in the above-mentioned embodiment. The signal detection apparatus 100 shown in fig. 10 may include: a determination unit 1001 and a processing unit 1002.

A determining unit 1001, configured to determine a first interference value of an uplink signal of a plurality of interfering terminals to a first uplink signal and a second interference value of noise to the first uplink signal; the uplink signal sent by the interfering terminal generates interference to the first uplink signal.

The determining unit 1001 is further configured to determine an interference included angle of the interfering cell, and determine a target interfering terminal and a corresponding target interference cancellation factor from a preset interference cancellation factor library according to the interference included angle. The preset interference elimination factor library comprises interference included angles of a plurality of strong interference terminals and interference elimination factors corresponding to each interference included angle, and the target interference terminal is as follows: and the strong interference terminal with the smallest angle difference between interference included angles with the interference cell in the plurality of strong interference terminals, wherein the large-scale path loss between the strong interference terminal and the target cell is larger than a preset threshold value.

The processing unit 1002 is configured to calculate a third interference value of the downlink signal of the interfering cell to the first uplink signal according to the target interference cancellation factor, the signal transmission power of the interfering cell, and the link loss between the interfering cell and the target cell.

The processing unit 1002 is further configured to determine a signal-to-noise ratio of the first uplink signal according to the signal strength of the first uplink signal, the first interference value, the second interference value, and the third interference value.

In one possible implementation manner, the plurality of interference terminals include a strong interference terminal and a weak interference terminal, and a large-scale path loss between the weak interference terminal and the target cell is smaller than a preset threshold.

The determining unit 1001 is specifically configured to: calculating an interference value of an uplink signal of the strong interference terminal to a first uplink signal according to the signal transmitting power of the strong interference terminal, a channel matrix between a target cell and the strong interference terminal and a pre-coding matrix of the strong interference terminal; calculating an interference value of an uplink signal of the weak interference terminal to a first uplink signal according to the signal transmitting power of the weak interference terminal and the link loss from the target cell to the weak interference terminal, wherein the first interference value comprises: the interference value of the uplink signal of the strong interference terminal to the first uplink signal and the interference value of the uplink signal of the weak interference terminal to the first uplink signal.

In a possible implementation manner, the determining unit 1001 is specifically configured to: rotating a connecting line of the target terminal and the target cell according to a preset direction by taking the position information of the target cell as a central point so as to enable the rotated connecting line of the target terminal and the target cell to be superposed with a connecting line of the interference cell and the target cell; and determining an interference included angle of the interference cell according to the rotation angle of a connecting line of the target terminal and the target cell, wherein the interference included angle is greater than or equal to 0 degree and less than or equal to 180 degrees.

In a possible implementation manner, a third interference value of the downlink signal of the interfering cell to the first uplink signal satisfies a first formula, where the first formula is: b3 ═ Σ _m βP _n /L _gn . Where B3 denotes a third interference value, beta denotes a target interference cancellation factor, P _n Signal transmission power, L, representing the m-th interfering cell _gn And representing the link loss between the mth interference cell and the target cell, wherein m represents the number of the interference terminals, m and n are positive integers, and n is less than or equal to m.

As yet another implementable manner, the processing unit 1002 in fig. 10 may be replaced by a processor, which may integrate the functions of the processing unit 1002.

Further, when the processing unit 1002 is replaced by a processor, the signal detection apparatus 100 according to the embodiment of the present application may be the signal detection apparatus shown in fig. 3.

The embodiment of the application also provides a computer readable storage medium. All or part of the processes in the above method embodiments may be performed by relevant hardware instructed by a computer program, which may be stored in the above computer-readable storage medium, and when executed, may include the processes in the above method embodiments. The computer readable storage medium may be an internal storage unit of the signal detection apparatus (including the data sending end and/or the data receiving end) of any of the foregoing embodiments, for example, a hard disk or a memory of the signal detection apparatus. The computer readable storage medium may also be an external storage device of the terminal device, such as a plug-in hard disk, a Smart Memory Card (SMC), a Secure Digital (SD) card, a flash memory card (flash card), and the like, which are provided on the terminal device. Further, the computer-readable storage medium may include both an internal storage unit and an external storage device of the signal detection apparatus. The computer-readable storage medium stores the computer program and other programs and data necessary for the signal detection device. The above-described computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.

It should be noted that the terms "first" and "second" and the like in the description, claims and drawings of the present application are used for distinguishing different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more, "at least two" means two or three and three or more, "and/or" for describing an association relationship of associated objects, meaning that three relationships may exist, for example, "a and/or B" may mean: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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 can be realized in a form of hardware, and can also be realized in a 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 stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An uplink signal detection method of a flexible frame structure simulation system, where the flexible frame structure simulation system includes a target cell and an interfering cell, the interfering cell is a cell where a downlink signal interferes with a first uplink signal, the first uplink signal is a signal received by the target cell and sent from a target terminal, and the target cell is a serving cell of the target terminal, the method includes:

determining a first interference value of uplink signals of a plurality of interference terminals to the first uplink signal and a second interference value of noise to the first uplink signal; the interference terminal is a terminal which generates interference on the first uplink signal by the transmitted uplink signal;

determining an interference included angle of an interference cell, and determining a target interference terminal and an interference elimination factor of the target interference terminal from a preset interference elimination factor library according to the interference included angle of the interference cell; the preset interference elimination factor library comprises interference included angles of a plurality of strong interference terminals and interference elimination factors corresponding to each interference included angle, and the target interference terminal is as follows: a strong interference terminal with the smallest angle difference between interference included angles with the target cell among the plurality of strong interference terminals, wherein the large-scale path loss between the strong interference terminal and the target cell is larger than a preset threshold;

calculating a third interference value of the downlink signal of the interference cell to the first uplink signal according to the target interference elimination factor, the signal transmission power of the interference cell and the link loss between the interference cell and the target cell;

and determining the signal-to-noise ratio of the first uplink signal according to the signal strength of the first uplink signal, the first interference value, the second interference value and the third interference value.

2. The method according to claim 1, wherein the plurality of interfering terminals include a strong interfering terminal and a weak interfering terminal, the weak interfering terminal is an interfering terminal whose large-scale path loss between the plurality of interfering terminals and the target cell is smaller than the preset threshold, and the determining a first interference value of an uplink signal of the plurality of interfering terminals on the first uplink signal includes:

calculating an interference value of an uplink signal of the strong interference terminal to the first uplink signal according to the signal transmitting power of the strong interference terminal, a channel matrix between the target cell and the strong interference terminal and a precoding matrix of the strong interference terminal;

calculating an interference value of an uplink signal of the weak interference terminal to the first uplink signal according to the signal transmission power of the weak interference terminal and the link loss from the target cell to the weak interference terminal, wherein the first interference value comprises: and the interference value of the uplink signal of the strong interference terminal to the first uplink signal and the interference value of the downlink signal of the weak interference cell to the first uplink signal.

3. The method of claim 1, wherein the determining the included interference angle of the interfering cell comprises:

rotating the connecting line of the target terminal and the target cell according to a preset direction by taking the position information of the target cell as a central point, so that the rotated connecting line of the target terminal and the target cell is superposed with the connecting line of the interference cell and the target cell;

and determining an interference included angle of the interference cell according to the angle of rotation of a connecting line of the target terminal and the target cell, wherein the interference included angle is greater than or equal to 0 degree and less than or equal to 180 degrees.

4. The method of any of claims 1-3, wherein the third interference value satisfies a first formula, the first formula being:

B3＝∑ _m βP _n /L _gn ；

wherein B3 represents the third interference value, β represents the target interference cancellation factor, P _n Signal transmission power, L, representing the m-th interfering cell _gn And representing the link loss between the mth interference cell and the target cell, wherein m represents the number of the interference cells, m and n are positive integers, and n is less than or equal to m.

5. The method of claim 4, wherein the signal-to-noise ratio satisfies a predetermined formula, the predetermined formula being:

SINR＝S1/(S1+B1+B2+B3)；

wherein, SINR is a signal-to-noise ratio of the first uplink signal, S1 is a signal strength of the first uplink signal, B1 is the first interference value, and B2 is the second interference value.

6. A signal detection device of a flexible frame structure simulation system is characterized in that the flexible frame structure simulation system comprises a target cell and an interference cell, the interference cell is a cell in which a downlink signal interferes with a first uplink signal, the first uplink signal is a signal received by the target cell and sent by a target terminal, and the target cell is a serving cell of the target terminal;

the determining unit is configured to determine a first interference value of uplink signals of multiple interfering terminals to the first uplink signal and a second interference value of noise to the first uplink signal; the interference terminal is a terminal which generates interference on the first uplink signal by the transmitted uplink signal;

the determining unit is further configured to determine an interference included angle of an interference cell, and determine a target interference terminal and an interference cancellation factor of the target interference terminal from a preset interference cancellation factor library according to the interference included angle of the interference cell; the preset interference elimination factor library comprises interference included angles of a plurality of strong interference terminals and interference elimination factors corresponding to each interference included angle, and the target interference terminal is as follows: a strong interference terminal with the smallest angle difference between interference included angles with the target cell among the plurality of strong interference terminals, wherein the large-scale path loss between the strong interference terminal and the target cell is larger than a preset threshold;

the processing unit is configured to calculate a third interference value of the downlink signal of the interfering cell to the first uplink signal according to the target interference cancellation factor, the signal transmission power of the interfering cell, and the link loss between the interfering cell and the target cell;

the processing unit is further configured to determine a signal-to-noise ratio of the first uplink signal according to the signal strength of the first uplink signal, the first interference value, the second interference value, and the third interference value.

7. The apparatus according to claim 6, wherein the plurality of interfering terminals include a strong interfering terminal and a weak interfering terminal, the weak interfering terminal is an interfering terminal whose large-scale path loss between the plurality of interfering terminals and the target cell is smaller than the preset threshold, the determining unit is specifically configured to:

8. The apparatus according to claim 7, wherein the determining unit is specifically configured to:

9. The apparatus of any of claims 6-8, wherein the third interference value satisfies a first formula, the first formula being:

B3＝∑ _m βP _n /L _gn ；

wherein B3 represents the third interference value, β represents the target interference cancellation factor, P _n Signal transmission power, L, representing the m-th interfering cell _gn RepresentAnd link loss between the mth interference cell and the target cell, wherein m represents the number of the interference cells, m and n are positive integers, and n is less than or equal to m.

10. The apparatus of claim 9, wherein the signal-to-noise ratio satisfies a predetermined formula, and wherein the predetermined formula is:

SINR＝S1/(S1+B1+B2+B3)；

11. A computer-readable storage medium having stored therein instructions which, when executed, implement the method of any one of claims 1-5.

12. A signal detection device, comprising: a processor, a memory, and a communication interface; the communication interface is used for the signal detection device to communicate with other equipment or a network; the memory is configured to store one or more programs, the one or more programs including computer-executable instructions, which when executed by the signal detection apparatus, cause the signal detection apparatus to perform the method of any of claims 1-5 by executing the computer-executable instructions stored by the memory.