CN115087012B

CN115087012B - Uplink signal detection method and device of flexible frame structure simulation system

Info

Publication number: CN115087012B
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: 2024-04-12
Anticipated expiration: 2042-06-20
Also published as: CN115087012A

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 comprises a target cell and an interference cell. The method comprises the following steps: determining a first interference value of the plurality of interference uplink signals to the 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, the signal transmitting power of the interference cell and the 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, the third interference value and the like.

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 (time division duplexing, TDD) mode, a cell may use different time slots of the same frequency channel (i.e., carrier) to enable transmission and reception of signals. That is, the cell may allocate uplink and downlink of the communication system to the same spectrum through the TDD technology. The uplink and the downlink occupy different time periods respectively, so that 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 DSUUU, DDSUU and DDDSU, for example. Where D denotes a Downlink slot (Downlink slot) refers to a slot for Downlink transmission. S denotes a Special slot (Special slot) refers to a slot for downlink transmission or uplink transmission. U denotes an Uplink slot (Uplink slot) and refers to a slot for Uplink transmission. In this way, the cell can flexibly select proper subframe structure configuration according to the uplink and downlink traffic carried by the cell, so that the uplink and downlink bandwidth transmission traffic configured by the subframe structure is used. However, when different terminals adopt different subframe configuration structures to send uplink signals to the cell, the uplink signals received by the cell are subject to cross time slot interference. At this time, the uplink signal received by the cell needs to be detected 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 uplink signals received by a cell so as to determine the signal quality of the uplink signals.

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, an uplink signal detection method of a flexible frame structure simulation system is provided, where the flexible frame structure simulation system includes a target cell and an interference cell, and a downlink signal sent by the interference 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 interferes with 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 terminals are as follows: and 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 transmitting 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, the first interference value, the second interference value and the third interference value of the first uplink signal.

Based on the technical scheme provided by the application, when the terminal adopts the flexible frame structure to send the uplink signal to the cell, the uplink signal from the terminal received by the cell 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 received by the cell from the terminal may be calculated according to the interference values (may also be referred to as interference power) of a plurality of interference sources (for example, the downlink signal of the interfering cell, noise, uplink signal of the interfering terminal, etc.) that generate interference to the uplink signal received by the cell from the terminal. 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 cell.

In one possible implementation, the plurality of interfering terminals includes a strong interfering terminal and a weak interfering terminal, and a large-scale path loss between the weak interfering terminal and the target cell is smaller than a preset threshold. The determining the first interference value of the uplink signals of the plurality of interfering terminals to the first uplink signal includes: calculating the interference value of the uplink signal of the strong interference terminal to the first uplink signal according to the signal transmitting 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; according to the signal transmitting power of the weak interference terminal and the link loss from the target cell to the weak interference terminal, calculating the interference value of the uplink signal of the weak interference terminal on the first uplink signal, 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 the interference included angle of the interference cell specifically includes: rotating the connection line between the target terminal and the target cell according to a preset direction by taking the position information of the target cell as a center point, so that the connection line between the rotated target terminal and the target cell coincides with the connection line between the interference cell and the target cell; and determining an interference included angle of the interference cell according to the rotation angle of the connecting line of the target terminal and the target cell, wherein the interference included angle is larger than or equal to 0 degrees and smaller than or equal to 180 degrees.

In a possible implementation manner, a third interference value of an uplink signal of an interfering terminal on a first uplink signal satisfies a first formula, where the first formula is: b3 = Σ _m βP _n /L _gn . Wherein B3 represents a third interference value, beta represents a target interference cancellation factor, P _n Representing the signal transmission power, L, of the mth interfering cell _gn The method is characterized in that the method is used for indicating the link loss between an mth interference cell and a target cell, m is used for indicating the number of 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=s1/(s1+b1+b2+b3); wherein, SINR is the signal-to-noise ratio of the first uplink signal, S1 is the signal strength of the first uplink signal, B1 is the first interference value, B2 is the second interference value, and B3 is the 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 interference cell, and a downlink signal transmitted by the interference cell interferes with a first uplink signal transmitted 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 of the possible designs of the first aspect. The signal detection means may implement the functions performed in the above aspects or in each of the possible designs, which may be implemented by hardware executing 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.

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

The determining unit is further configured to determine an interference included angle of the interference cell, and determine a target interference 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 terminals are as follows: and 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 transmitting power of the interference cell and the link loss between the interference 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.

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

In one possible implementation, the plurality of interfering terminals includes a strong interfering terminal and a weak interfering terminal, and a large-scale path loss between the weak interfering terminal and the target cell is smaller than a preset threshold. The determining unit is specifically configured to: calculating the interference value of the uplink signal of the strong interference terminal to the first uplink signal according to the signal transmitting 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; according to the signal transmitting power of the weak interference terminal and the link loss from the target cell to the weak interference terminal, calculating the interference value of the uplink signal of the weak interference terminal on the first uplink signal, 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 the connection line between the target terminal and the target cell according to a preset direction by taking the position information of the target cell as a center point, so that the connection line between the rotated target terminal and the target cell coincides with the connection line between the interference cell and the target cell; and determining an interference included angle of the interference cell according to the rotation angle of the connecting line of the target terminal and the target cell, wherein the interference included angle is larger than or equal to 0 degrees and smaller than or equal to 180 degrees.

In a possible implementation manner, a third interference value of a downlink signal of an interfering cell to a first uplink signal satisfies a first formula, where the first formula is: b3 = Σ _m βP _n /L _gn . Wherein B3 represents a third interference value, beta represents a target interference cancellation factor, P _n Representing the signal transmission power, L, of the mth interfering cell _gn The method is characterized in that the method is used for indicating the link loss between an mth interference cell and a target cell, m is used for indicating the number of 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 device may implement the functions performed in the above aspects or in each possible design, where the functions may be implemented by hardware, for example: in one possible design, the signal detection device may include: a processor and a communication interface, the processor being operable to support the signal detection apparatus to carry out the functions involved in the first aspect or 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 holding computer-executable instructions and data necessary for the signal detection device. When the signal detection device is operated, the processor executes the computer-executable instructions stored in the memory, so that the signal detection device performs the above-mentioned first aspect or any one of the possible designs of the uplink signal detection method of the flexible frame structure simulation system.

In a fourth aspect, a computer readable storage medium is provided, which may be a readable non-volatile storage medium, where computer instructions or a program are stored, which when run on a computer, cause the computer to perform the above first aspect or any one of the above aspects of the possible upstream signal detection method for designing the flexible frame structure simulation system.

In a fifth aspect, a computer program product is provided comprising instructions which, when run on a computer, enable the computer to perform the method of upstream signal detection of the flexible frame structure simulation system of the first aspect or any one of the possible designs of the aspects.

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

The technical effects of any one of the design manners of the second aspect to the sixth aspect may be referred to the technical effects of the first aspect, and will not be described herein.

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 device 300 according to an embodiment of the present application;

fig. 4 is a flow chart 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 flow chart 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 angle of an interference terminal according to an embodiment of the present application;

fig. 7 is a flow chart 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 interference angles of an interference cell according to an embodiment of the present application;

fig. 9 is a flow chart 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 device 100 according to an embodiment of the present application.

Detailed Description

In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, 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 the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the disclosure described herein may be capable of operation in sequences other than those illustrated or described herein. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with aspects of embodiments of the present application as detailed in the accompanying 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 cells can bring the maximum throughput gain, the communication quality of the planned communication system can be evaluated and analyzed in a simulation mode before the actual networking. For example, for a New Radio (NR) cell in a communication system having a TDD model, the NR cell uses a millimeter wave band for transmission data of signals. However, the millimeter wave band has poor penetrability, and in an environment with good isolation, the NR cell can adopt a flexible frame mode, and the data can be transmitted by using bandwidths corresponding to different subframe configuration structures. However, when the NR cell uses a flexible frame to perform signal transmission with the terminal, a problem of cross slot interference is introduced, which easily causes a decrease in system capacity.

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

In the simulation scene, when the cell and the terminal adopt the same frame structure to carry out signal transmission, the uplink signal sent by the terminal to the cell can be interfered by the downlink signal sent by the interference cell in the same time slot. In order to determine a signal received by a certain cell from an uplink signal transmitted by a terminal (to distinguish from an interfering terminal, referred to as a target terminal), the uplink signal received by the cell from the target terminal may be calculated by the following formula one. The cell is a serving cell of the target terminal.

Where y represents a signal when an uplink signal transmitted by the target terminal arrives at the target cell (i.e., a serving cell of the target terminal). P (P) ₁ Representing the signal transmit power of the target terminal. H _1s Representing the channel matrix between the target terminal and the target cell. The channel matrix has an order of np×nb. The elements in the channel matrix represent the frequency domain channel response between the antennas of the target terminal and the antennas 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 (W) ₁ Representing the precoding matrix of the target terminal. The precoding matrix has an order of nb×m1. M1 is the number of signal streams of the uplink signal sent by the target terminal. X is x ₁ ＝(x _1.1 ，x _1.2 ，…，x _1.M ) ^T Normalized vector of useful signal sent for target terminal. P (P) _i Representing the signal transmit power of a strongly interfering terminal. H _1g Representing the channel matrix between the strongly interfering terminal and the target cell. W (W) _i Representing the precoding matrix of the i-th strong interference terminal. i is a positive integer. X is x _i ＝(x ₁ ，x ₂ ，…，x _Mj ) ^T And the normalized vector representing the signal sent by the strong interference terminal. z is noise, z= (z) ₁ ，z ₂ ，…，z _Nr ) ^T . The elements in z are CN (0, sigma ² )。σ ² Is the variance of the noise. P (P) _w Representing the signal transmit power of a weak interfering terminal. L (L) _ig Indicating 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 will not be repeated.

The interfering cell may refer to a terminal that generates interference to an uplink signal received by the target cell. The interference terminal and the target terminal can both access the same service cell, and can also be the terminal accessing the interference 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 use the same frame structure and the same time slot to respectively transmit uplink signals to the corresponding serving cells, the uplink signals transmitted by the terminal 2 may interfere with the uplink signals transmitted by the terminal 1 to the cell 1. At this time, the terminal 2 may be referred to as a cell 1 and an interfering terminal of the terminal 1.

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

Alternatively, if cell 1 has multiple interfering terminals, the multiple interfering terminals may be ranked according to the magnitude of the large-scale path loss to cell 1, and the first N interfering terminals may be used as strong interfering terminals for cell 1, and the remaining interfering terminals may be used as weak interfering terminals for cell 1. N is a positive integer less than the number of interfering terminals.

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

Alternatively, if the terminal 1 has a plurality of interfering cells, the plurality of interfering cells may be ranked according to the magnitude of the large-scale path loss from the interfering cells to the cell 1, and the first N interfering cells are regarded as strong interfering cells of the cell 1, and the remaining interfering cells are regarded 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, the combined effect of inter-symbol interference (ISI) and noise on the signal is reduced in order to reduce the distortion of the signal. The signal receiving end (such as the target cell) can perform linear detection on the received signal to obtain a detected signal (i.e. the recovered original signal).

For example, the target cell may detect the received uplink signal using a preset linear detection algorithm. The preset linear detection algorithm may be Zero Forcing (ZF), minimum mean square error (minimum mean square error, MMSE), or the like, but may be other linear detection algorithms, which are not limited.

In an example, the target cell may perform linear detection on the received uplink signal using a preset detection matrix, 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,representing the uplink signal received by the target cell, the uplink signal including the desired signal and the inter-stream interference signal. />Indicating the interference signals of other terminals in a multi-user (MU) paired terminal group and the interference signals of strong interfering terminals. The MU paired terminal group includes a target terminal and one or more interfering terminals. Dz represents noise disturbance. />Representing the interfering signal of a weak interfering terminal.

For convenience of description, the detected downlink signal may be modified as follows:

wherein,

for any signal flow (such as an mth signal flow) in the uplink signal received by the target cell, the signal after linear detection of the mth signal flow is:

wherein A is _m Is the m-th line element of a. B (B) _im Is B _i Is the m-th line element of (c).

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

wherein A is _mj Is the mth row and the jth column element of A. B (B) _imj Is B _i The mth row and the jth column elements of (c). D (D) _mj Is the mth row and the jth column element of D.

In another simulation scenario, when the cell and the terminal adopt a flexible frame structure to perform signal transmission, the downlink signal sent by the cell is not only interfered by the downlink signal of the interference cell in the same time slot, but also can be interfered by the uplink signal of the interference terminal.

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

In view of this, the embodiment of the present application provides an uplink signal detection method of a flexible frame structure simulation system, where when a terminal uses a flexible frame structure to send an uplink signal to a cell, the uplink signal received by the cell from the terminal may be interfered by a downlink signal of a neighboring 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 received by the cell from the terminal may be calculated according to the interference values (may also be referred to as interference power) of a plurality of interference sources (for example, the downlink signal of the interfering cell, noise, uplink signal of the interfering terminal, etc.) that generate interference to the uplink signal received by the cell from the terminal. 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 cell.

It should be noted that, the communication systems shown in fig. 1 and fig. 2 are communication systems constructed by simulation by the simulation device. The cells and terminals in fig. 1 and 2 are both 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. Thus, when networking is performed later, communication engineering personnel can adjust or optimize the cell to be planned according to the simulation result.

The method provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

It should be noted that, the network system described in the embodiments of the present application is for more clearly describing the technical solution of the embodiments of the present application, and does not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network system and the appearance of other network systems, the technical solution provided in the embodiments of the present application is applicable to similar technical problems.

In one example, the embodiments of the present application also provide a signal detection apparatus that may be used to perform the methods of the embodiments of the present application. For example, the signal detection device may be a simulation device, or may be a device in the simulation device. The signal detection device may be provided with simulation software which may be used to perform the 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 device 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, general-purpose processor, network processor (network processor, NP), digital signal processor (digital signal processing, DSP), microprocessor, microcontroller, programmable logic device (programmable logic device, PLD), or any combination thereof. The processor 301 may also be any other device having processing functions, such as, without limitation, a circuit, a device, or a software module.

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 components included in the signal detection apparatus 300.

Memory 304 for storing instructions. Wherein the instructions may be computer programs.

The memory 304 may be, but not limited to, a read-only memory (ROM) or other type of static storage device capable of storing static information and/or instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device capable of storing information and/or instructions, an EEPROM, a CD-ROM (compact disc read-only memory) or other optical disk storage, an optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, etc.

It should be noted that the memory 304 may exist separately from the processor 301 or may be integrated with the processor 301. Memory 304 may be used to store instructions or program code or some data, etc. The memory 304 may be located inside the signal detection device 300 or outside the signal detection device 300, without limitation. The processor 301 is configured to execute the instructions stored in the memory 304, so as to implement the uplink signal detection method of the flexible frame structure simulation system provided in the following embodiments of the present application.

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

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

It should be noted that the signal detecting apparatus 300 may be a desktop computer, a portable computer, a web server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a similar structure as 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 may combine some components, or may be arranged differently, in addition to those shown in fig. 3.

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

Further, actions, terms, etc. referred to between embodiments of the present application may be referred to each other without limitation. In the embodiment of the present application, the name of the message or the name of the parameter in the message, etc. interacted between the devices are only an example, and other names may also be adopted in the specific implementation, and are not limited.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). 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 plural.

The following describes an uplink signal detection method of the flexible frame structure simulation system provided in the embodiment of the present application with reference to the network architecture shown in fig. 2.

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

In the first simulation stage, the simulation device may construct a preset interference cancellation factor library. In the second simulation stage, 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 the interference included angle of the interference cell and a preset interference cancellation factor library, and calculate an interference value of the interference cell and an interference value of the plurality of interference cells and the noise according to the target interference cancellation factor. The simulation device can calculate a plurality of interference values to obtain the signal-to-noise ratio of the uplink signal received by the target cell from the target terminal. The simulation preparation phase and the simulation execution phase are described below.

1. In a first stage of the simulation of the first type,

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 a plurality of strong interference terminals through simulation.

The strong interference terminal may refer to the above description, and will not be repeated. The interference cancellation factor may be used to characterize the interference level of the uplink signal sent by the strong interference terminal received by the cell to be detected (i.e., the target cell). The interference cancellation factor is greater than 0 and less than 1.

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

wherein, uplink strong may refer to a strong interference terminal. Uplink weak may refer to weak interfering terminals. P (P) _i Representing the signal transmit power of the i-th strong interfering terminal. i is a positive integer. H _1g Representing the channel matrix between the i-th strong interfering terminal and the target cell. W (W) _i Representing the precoding matrix of the i-th strong interference terminal. X is x _i And the normalized vector representing the useful signal sent by the i-th strong interference terminal. D represents the detection matrix. P (P) _w Representing the signal transmit power of the mth weak interference terminal. w is a positive integer. L (L) _1g Indicating the link loss between the mth weak interference terminal and the target cell.

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

In a possible implementation manner, for the ith strong interference terminal, record is madeInterference cancellation factor for the i-th strong interfering 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 angle of the interference terminal i may be an angle between the connection between the interference terminal i and the target cell and the connection between the target cell and the target terminal.

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

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

Wherein θ _i Indicating the interference angle of the interfering terminal i. Alpha _i Indicating the rotation angle of the connection line of the target cell and the target terminal.

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

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

In one example, the pre-set interference cancellation factor library may be as shown in table 1. The interference included angle of 15 strong interfering cells and the interference cancellation factor are included in table 1.

TABLE 1

It should be noted that the data in table 1 above are only exemplary. The number of terminals in the table and the interference included angle 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 interference angles and interference cancellation factors of multiple strong interference terminals. Therefore, the interference elimination factor of the interference cell can be rapidly and conveniently determined according to the interference included angle of the interference cell and the preset interference elimination factor library.

2. And a second simulation stage.

As shown in fig. 7, the present application provides an uplink signal detection method 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 a 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 of fig. 2.

In one example, the plurality of interfering terminals may be classified into strong and weak interfering terminals according to a large-scale path loss between the interfering terminal and the target cell. The strong interference terminal and the weak interference terminal may refer to the above description, and will not be repeated. Noise may refer to interfering signals other than interfering cells and interfering terminals.

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 an uplink signal of the strong interference terminal on the first uplink signal according to a 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.

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

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

Wherein Bq represents an interference value of an uplink signal of the strong interference terminal to the first uplink signal. P (P) _i And the signal transmitting power used by the uplink signal sent by the ith strong interference terminal is shown. H _1g Representing the channel matrix between the i-th strong interfering terminal and the target cell. W (W) _i Representing the precoding matrix of the i-th strong interference terminal. j is the number of strong interference terminals, i and j are positive integers, and i is less than or equal to j.

In yet another example, the simulation device may calculate an interference value of an uplink signal of the weak interference terminal on the first uplink signal according to a signal transmission power of the weak interference terminal and a 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 a large scale path loss. G _u Indicating the antenna gain of a weak interfering terminal. G _g Representing the antenna gain of the target cell. The method of calculating the antenna gain can be referred to the prior art.

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

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

Wherein Br represents an interference value of an uplink signal of the i-th weak interference terminal to the first uplink signal. P (P) _w Indicating the ith weak The interference terminal transmits the signal transmitting power used by the uplink signal. j is the number of weak interference terminals, i and j are positive integers, and i is less than or equal to j.

When the number of the strong interference terminals and the weak interference terminals is plural, the interference value of the strong interference terminals to the first uplink signal may be the sum of the interference values of the plurality of strong interference terminals to the first uplink signal. The interference value of the weak interference terminal to the first uplink signal may refer to a sum of interference values of a plurality of weak interference terminals to the first uplink signal.

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

B2＝∑ _j |D| ² σ ² Formula five

Wherein B2 represents the second interference value. j is the amount of noise. j is a positive integer.

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

The downlink signal sent by the interfering cell may interfere with the first uplink signal. For example, the interfering cell may be the interfering cell in fig. 2.

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

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

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

Wherein θ _j Indicating the interference angle of the interfering cell j. Alpha _j Indicating the rotation angle of the connection line of the target cell and the target terminal.

In yet another possible implementation manner, as shown in fig. 8, the simulation device determines that the interference included angle of the interfering cell is 35 °. In combination with table 1, the simulation device may calculate an angle difference between the interference cell and each interference included angle in table 1, to obtain a plurality of angle differences. Thus, the simulation device can take the terminal with the smallest angle difference as the target interference terminal, and take 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 there are multiple minimum values in the multiple angle differences, the simulation device may use the terminal corresponding to the multiple angle differences as the target interference terminal, 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. And are not limited.

S703, calculating a third interference value of the downlink signal of the interference cell to the first uplink signal according to the target interference cancellation factor, the signal transmitting 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 served terminal, where 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 interference 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 Indicating the antenna gain of the interfering cell.

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

B3＝∑ _{i epsilon uplink} ηP _i /L _1i Equation seven

Wherein B3 represents a third interference value. η represents a target interference cancellation factor. P (P) _i Representing the signal transmit power of the interfering cell.

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

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 that, in the simulation environment, the target terminal transmits the uplink signal to the target cell in response to the input instruction. Accordingly, in the same simulation environment, the target cell may receive the first uplink signal from the target terminal.

In the embodiment of the present application, the target cell, the interference cell, the target terminal and the interference terminal are all in the same simulation environment. The interaction between cells and the interaction between the signals between the cells and the terminal are all the interaction of simulation analog signals. The signals between the target cell and the target terminal and the signals between the interference cell and the interference terminal are analog signals. The analog signal may be generated for the emulation device in response to an input instruction. Thus, the simulation equipment can acquire the signals transmitted by each cell and each terminal and the received signals.

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

In an 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 can perform linear detection on the signal to obtain a first uplink signal from the target terminal, which is 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 will not be described in detail. Precoding matrix W of target terminal ₁ The precoding matrix may be preconfigured for the target terminal, the precoding matrix being related to the 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 signal when the uplink signal sent by the target terminal reaches the target cell may be The simulation device can 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, which is received by the target cell. For example, the linear matrix may be the detection matrix D described above. The uplink signal received by the target cell from the target terminal is +>

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

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

S1＝P|DH _1s W ₁ | ² Equation eight

S1 is the signal strength of a first uplink signal received by a target cell from a target terminal, and P is the signal transmitting power used by the target terminal to transmit the uplink signal to the target cell.

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

SINR = S1/(s1+b1+b2+b3) formula nine

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

Based on the technical scheme shown in fig. 8, when the terminal adopts the flexible frame structure to send the uplink signal to the cell, 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 received by the cell from the terminal may be calculated according to the interference values (may also be referred to as interference power) of a plurality of interference sources (for example, the downlink signal of the interfering cell, noise, uplink signal of the interfering terminal, etc.) that generate interference to the uplink signal received by the cell from the terminal. 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 an uplink signal detection method of a flexible frame structure simulation system, where the method includes S901 to S910.

And S901, establishing a channel matrix between each terminal and the serving cell and between each terminal and the strong interference cell.

Herein, S901 may refer to the description of S804, and will not be described herein.

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

Herein, S902 may refer to the description of S802 above, and will not be described herein.

S903, determining a cell with the same time slot resource as the target cell.

The cell with the same time slot resource as the target cell is an interference cell.

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

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

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

Wherein, the interference cell does not use the downlink time slot resource means that the interference cell currently transmits a downlink signal.

In one possible implementation, the simulation device may determine and identify the strong and weak interfering terminals at a start of the simulation. Thus, the simulation device can determine whether the interference terminal establishes a channel matrix with the target cell according to the identification of the interference terminal.

S906, when the interference terminal and the target cell establish a channel matrix, the interference terminal is used as a strong interference terminal.

S907, constructing a preset interference cancellation factor library.

S907 may refer to S501 and S502, and will not be described herein.

S908, determining interference elimination factors of the cross interference terminals according to a preset interference elimination factor library.

Herein, S908 may refer to the description of S802, which is not described herein.

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

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

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

Based on the technical scheme shown in fig. 9, when the terminal adopts the flexible frame structure to send the uplink signal to the cell, 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 received by the cell from the terminal may be calculated according to the interference values (may also be referred to as interference power) of a plurality of interference sources (for example, the downlink signal of the interfering cell, noise, uplink signal of the interfering terminal, etc.) that generate interference to the uplink signal received by the cell from the terminal. 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.

The various schemes in the embodiments of the present application may be combined on the premise of no contradiction.

The embodiment of the present application may divide the functional modules or functional units of the signal detection apparatus according to the above method example, 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 modules may be implemented in hardware, or in software functional modules or functional units. The division of the modules or units in the embodiments of the present application is merely a logic function division, and other division manners may be implemented in practice.

In the case where respective functional blocks are divided by corresponding respective functions, fig. 10 shows a schematic configuration of a signal detection apparatus 100, and the signal detection apparatus 100 can be used to perform the functions involved in the simulation device in the above-described embodiment. The signal detection apparatus 100 shown in fig. 10 may include: a determining 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 interferes with the first uplink signal.

The determining unit 1001 is further configured to determine an interference included angle of the interfering cell, and determine, according to the interference included angle, a target interference terminal and a corresponding target interference cancellation factor from a preset interference cancellation factor library. 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 terminals are as follows: and 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 on 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, the plurality of interfering terminals includes a strong interfering terminal and a weak interfering terminal, and a large-scale path loss between the weak interfering terminal and the target cell is smaller than a preset threshold.

The determining unit 1001 is specifically configured to: calculating the interference value of the uplink signal of the strong interference terminal to the first uplink signal according to the signal transmitting 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; according to the signal transmitting power of the weak interference terminal and the link loss from the target cell to the weak interference terminal, calculating the interference value of the uplink signal of the weak interference terminal on the first uplink signal, 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 the connection line between the target terminal and the target cell according to a preset direction by taking the position information of the target cell as a center point, so that the connection line between the rotated target terminal and the target cell coincides with the connection line between the interference cell and the target cell; and determining an interference included angle of the interference cell according to the rotation angle of the connecting line of the target terminal and the target cell, wherein the interference included angle is larger than or equal to 0 degrees and smaller than or equal to 180 degrees.

As yet another implementation, 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 detecting apparatus 100 according to the embodiment of the present application may be the signal detecting apparatus shown in fig. 3.

Embodiments of the present application also provide a computer-readable storage medium. All or part of the flow in the above method embodiments may be implemented by a computer program to instruct related hardware, where the program may be stored in the above computer readable storage medium, and when the program is executed, the program may include the flow in the above method embodiments. The computer readable storage medium may be an internal storage unit of the signal detection apparatus (including the data transmitting 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 be an external storage device of the terminal apparatus, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash card (flash card), or the like, which are provided in the terminal apparatus. Further, the computer readable storage medium may further include both an internal storage unit and an external storage device of the signal detection apparatus. The computer-readable storage medium is used for storing the computer program and other programs and data required by 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 between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

It should be understood that, in the present application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two or three and three or more, "and/or" for describing an association relationship of an association object, three kinds of relationships may exist, for example, "a and/or B" may mean: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). 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.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

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

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely a specific embodiment of the present application, but the protection 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 in the protection 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. The uplink signal detection method 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, and the method comprises the following steps:

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

determining an interference included angle of an interference cell; the interference included angle is determined according to the rotation angle of the connecting line of the target terminal and the target cell, the rotation angle is the rotation angle when the connecting line of the target terminal and the target cell after rotation and the connecting line of the interference cell and the target cell coincide with each other by taking the position information of the target cell as a center point and rotating the connecting line of the target terminal and the target cell according to a preset direction; the interference included angle is larger than or equal to 0 degrees and smaller than or equal to 180 degrees;

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 elimination factors corresponding to interference included angles of a plurality of strong interference terminals and each interference included angle, and the target interference terminals are: a strong interference terminal with the smallest angle difference between the interference included angles of the plurality of strong interference terminals and the target cell, 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 cancellation factor, the signal transmitting power of the interference cell and the link loss between the interference cell and the target cell;

wherein the third interference value satisfies a first formula, the first formula is:

B3＝∑ _m βP _n /L _gn ；

wherein B3 represents the third interference value, beta represents the target interference cancellation factor, P _n Representing the signal transmission power, L, of the mth interfering cell _gn 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;

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 of claim 1, wherein the plurality of interfering terminals include a strong interfering terminal and a weak interfering terminal, the weak interfering terminal being an interfering terminal of the plurality of interfering terminals having a large-scale path loss with the target cell that is less than the preset threshold, the determining a first interference value of uplink signals of the plurality of interfering terminals to the first uplink signal comprising:

calculating the interference value of the uplink signal of the strong interference terminal to the first uplink signal according to the signal transmitting 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;

according to the signal transmitting power of the weak interference terminal and the link loss from the target cell to the weak interference terminal, calculating the interference value of the uplink signal of the weak interference terminal on the first uplink signal, 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 downlink signal of the weak interference cell to the first uplink signal.

3. The method according to claim 1 or 2, 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.

4. The signal detection device of the flexible frame structure simulation system is characterized by comprising a target cell and an interference cell, wherein the interference cell is a cell for generating interference on a first uplink signal by a downlink signal, the first uplink signal is a signal which is received by the target cell and is sent by a target terminal, the target cell is a service cell of the target terminal, and the device comprises a determining unit and a processing unit;

the determining unit is configured to determine 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 to the first uplink signal by the transmitted uplink signal;

the determining unit is further used for determining an interference included angle of the interference cell; the interference included angle is determined according to the rotation angle of the connecting line of the target terminal and the target cell, the rotation angle is the rotation angle when the connecting line of the target terminal and the target cell after rotation and the connecting line of the interference cell and the target cell coincide with each other by taking the position information of the target cell as a center point and rotating the connecting line of the target terminal and the target cell according to a preset direction; the interference included angle is larger than or equal to 0 degrees and smaller than or equal to 180 degrees;

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;

B3＝∑ _m βP _n /L _gn ；

5. The apparatus according to claim 4, wherein the plurality of interfering terminals include a strong interfering terminal and a weak interfering terminal, the weak interfering terminal being an interfering terminal, of the plurality of interfering terminals, having a large-scale path loss with the target cell smaller than the preset threshold, the determining unit is specifically configured to:

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

SINR＝S1/(S1+B1+B2+B3)；

7. A computer readable storage medium having instructions stored therein which, when executed, implement the method of any of claims 1-3.

8. A signal detection apparatus, comprising: a processor, a memory, and a communication interface; wherein the communication interface is used for the signal detection device to communicate with other equipment or network; the memory is configured to store one or more programs, the one or more programs comprising computer-executable instructions that, when executed by the signal detection apparatus, cause the signal detection apparatus to perform the method of any of claims 1-3.