CN113949470B

CN113949470B - Receiver selection method, wireless device, and storage medium

Info

Publication number: CN113949470B
Application number: CN202010694026.6A
Authority: CN
Inventors: 冉建军; 韩重阳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2023-06-02
Anticipated expiration: 2040-07-17
Also published as: CN113949470A

Abstract

A receiver selection method, wireless equipment and storage medium are disclosed, belonging to the communication technical field. The air interface environment analysis result can represent the channel characteristics between one or more STAs and the wireless device, the wireless device can automatically select a receiver for receiving data according to the air interface environment analysis result, the selection method is simple, and the switching efficiency of the receiver is high.

Description

Receiver selection method, wireless device, and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a receiver selection method, a wireless device, and a storage medium.

Background

To accommodate different air interface environments, to improve air interface performance, an Access Point (AP) may include a variety of different types of receivers, such as a minimum mean square error (minimum mean square error, MMSE) receiver, a maximum likelihood detection (maximum likelihood detection, MLD) receiver, an interference rejection combining (interference rejection combination, IRC) receiver, and so on. If the change condition of the air interface environment is identified by manual experience, then the receivers used by the AP in different air interface environments are manually configured, and the method is complex.

Disclosure of Invention

The application provides a receiver selection method, wireless equipment and a storage medium. The technical scheme is as follows:

in a first aspect, a receiver selection method is provided, the method comprising: the wireless device obtains an air interface environment analysis result, wherein the air interface environment analysis result is used for representing channel characteristics between one or more Stations (STAs) and the wireless device; and the wireless equipment selects a target receiver according to the air interface environment analysis result, wherein the target receiver is used for receiving the data sent by the one or more STAs.

In the application, the air interface environment analysis result can represent the channel characteristics between one or more STAs and the wireless device, the wireless device can automatically select the receiver for receiving the data according to the air interface environment analysis result, the selection method is simple, and the switching efficiency of the receiver is high.

In some possible implementations, the selecting a target receiver includes selecting one of candidate receivers as a target receiver, the candidate receivers including at least two of an MLD receiver, an IRC receiver, and an MMSE receiver.

In some possible implementations, the implementation process of the wireless device obtaining the air interface environment analysis result is: the wireless device receives a physical layer protocol data unit (physicalprotocol data unit, PPDU); the wireless device measures the PPDU to obtain the air interface environment analysis result, the air interface environment analysis result including one or more of: and the data stream number supported by the air interface environment between the one or more STAs and the wireless device and the interference signal index of the PPDU.

The air interface environment analysis result is obtained by the wireless device according to the PPDU measurement received in real time. Therefore, the receiver is selected for the STA corresponding to the PPDU according to the air interface environment analysis result, which is equivalent to selecting and switching the receiver according to the real-time change condition of the air interface environment between the STA and the wireless device, so that the timely linkage of the switching of the receiver and the change condition of the air interface environment is realized, and the air interface spectrum efficiency can be utilized to the maximum.

In some possible implementations, when the candidate receiver includes an MLD receiver, the air interface environment analysis result includes a number of data streams supported by the air interface environment, the wireless device selects a target receiver according to the air interface environment analysis result, including: the wireless device selects an MLD receiver as the target receiver if a ratio of the number of data streams supported by the air interface environment to the number of receive antennas of the wireless device is greater than a first threshold.

When the ratio of the number of data streams supported by the air interface environment to the number of receiving antennas of the wireless device is greater than a first threshold, it is indicated that the channel of the current PPDU is more suitable for multi-stream transmission. Since the MLD receiver is more suitable for canceling inter-stream interference at the time of multi-stream transmission than the IRC receiver and the MMSE receiver, selecting the MLD receiver as the target receiver in this case can achieve a better reception effect.

In some possible implementations, when the candidate receiver includes an IRC receiver, and the air interface environment analysis result includes an interference signal indicator of the PPDU, the wireless device selects, according to the air interface environment analysis result, an implementation procedure of the target receiver to be: if the interference signal indicator of the PPDU is greater than a second threshold, the wireless device selects an IRC receiver as the target receiver.

When the interference signal index of the PPDU is greater than the second threshold, it is indicated that the PPDU is greatly interfered by signals of other channels. In this case, since the IRC receiver is more suitable for canceling other signal interference than the MLD receiver and the MMSE receiver, the wireless device selects the IRC as a target receiver through which data transmitted later by the STA transmitting the PPDU is received.

In some possible implementations, when the candidate receiver includes an MLD receiver, an IRC receiver, and an MMSE receiver, the air interface environment analysis result includes a number of data streams supported by the air interface environment and an interference signal index of the PPDU, and the implementation process of selecting, by the wireless device, the target receiver according to the air interface environment analysis result includes: and if the number of the data stream numbers supported by the air interface environment is not more than a first threshold value in the number of the receiving antennas of the wireless device and the interference signal index of the PPDU is not more than a second threshold value, the wireless device takes an MMSE receiver as the target receiver.

If the number of data streams supported by the air interface environment corresponding to the PPDU is not greater than a first threshold and the interference signal index of the PPDU is not greater than a second threshold, the wireless device selects the MMSE receiver as a target receiver in consideration of the fact that the power consumption of the MMSE receiver is smaller than that of the MLD receiver and the IRC receiver, so that the power consumption of the wireless device is reduced.

In some possible implementations, when the candidate receiver includes an MLD receiver and an MMSE receiver, the air interface environment analysis result includes a data stream number supported by the air interface environment, and the wireless device selects, according to the air interface environment analysis result, an implementation procedure of the target receiver to be: if the ratio of the number of data streams supported by the air interface environment to the number of receiving antennas of the wireless device is not greater than a first threshold, the wireless device selects the MMSE receiver as the target receiver.

In some possible implementations, when the candidate receiver includes an IRC receiver and an MMSE receiver, the air interface environment analysis result includes an interference signal index of the PPDU, and the wireless device selects, according to the air interface environment analysis result, an implementation procedure of the target receiver to be: if the interference signal indicator of the PPDU is not greater than a second threshold, the wireless device selects the MMSE receiver as the target receiver.

In some possible implementations, the number of PPDUs is greater than 1. In this case, the air interface environment analysis result may include a result obtained by the wireless device measuring a plurality of PPDUs within one statistical period. On the basis, the wireless device uniformly selects the receiver in the next statistical period for a plurality of STAs connected by the wireless device according to the statistical result in the statistical period, and the selection efficiency is higher.

In a case that the number of PPDUs is greater than 1, in one possible implementation manner, when the candidate receiver includes an MLD receiver, and the air interface environment analysis result includes the number of data streams supported by the air interface environment, the wireless device selects an implementation procedure of the target receiver according to the air interface environment analysis result: determining the number of PPDUs of which the ratio of the number of data streams supported by the corresponding air interface environment to the number of receiving antennas of the wireless equipment is larger than a first threshold value to obtain a first number; the wireless device selects the MLD receiver as the target receiver if a ratio of the first number to a total number of PPDUs is greater than a third threshold.

In a case that the number of PPDUs is greater than 1, in another possible implementation manner, when the candidate receiver includes an IRC receiver, and the air interface environment analysis result includes an interference signal index of the PPDU, the wireless device selects, according to the air interface environment analysis result, an implementation procedure of the target receiver as follows: determining the number of PPDUs with interference signal indexes larger than a second threshold value to obtain a second number; if the ratio of the second number to the total number of PPDUs is greater than a fourth threshold, the wireless device selects the IRC receiver as the target receiver.

In a second aspect, a receiver selection method is provided, the method comprising a wireless device receiving data in turns using a plurality of receivers; the wireless device changes a time period for receiving data using the plurality of receivers according to a reception effect of each of the plurality of receivers, wherein a time period for which a receiver having a good reception effect is used is longer.

In the method, the wireless device selects the receiver with good receiving effect by alternately using each receiver to receive data, so that the automatic selection and switching of the receiver are realized, and the method is simple and convenient and has high efficiency.

In some possible implementations, the plurality of receivers are at least two of an MLD receiver, an IRC receiver, and an MMSE receiver.

In some possible implementations, the reception effect includes at least one of a preamble reception effect and a data portion reception performance.

Wherein the preamble reception effect is determined according to a cyclic redundancy check (cyclic redundancy check, CRC) result of the SIG field of the received PPDU. In one possible implementation, the preamble reception effect is characterized by a ratio of a number of PPDUs that do not pass the CRC of the included SIG field to a number of PPDUs that pass the CRC of the included SIG field.

In addition, the data portion reception performance is determined according to a CRC result of the data portion of the received PPDU. The data portion reception performance is characterized by a ratio of the number of PPDUs that the CRC of the included data portion does not pass to the number of PPDUs that the CRC of the included data portion passes. Alternatively, the data portion reception performance is characterized by a total number of bytes of a MAC layer protocol data unit (MAC Protocol Data Unit, MPDU) included in a PPDU through which a CRC of the included data portion passes.

In some possible implementations, the wireless device changes a duration of receiving data using the plurality of receivers according to a receiving effect of each of the plurality of receivers by: the wireless device extends the duration of time that the best-receiving receiver receives data.

In one possible implementation manner, the wireless device extends the duration that the receiver with the best receiving effect receives the data, and refers to extending the duration that the receiver with the best receiving effect receives the data next time.

In another possible implementation, the wireless device extends the duration of receiving data by the receiver with the best reception effect, which means increasing the number of times data is received by the receiver with the best reception effect.

In a third aspect, a wireless device is provided, the wireless device having functionality to implement the receiver selection method behavior of the first or second aspects above. The wireless device comprises at least one module for implementing the receiver selection method provided in the first or second aspect above.

In a fourth aspect, a wireless device is provided, where the structure of the wireless device includes a processor, a memory, and a receiver, where the memory is configured to store a program that supports the wireless device to perform the receiver selection method provided in the first aspect or the second aspect, and store data related to implementing the receiver selection method provided in the first aspect or the second aspect. The processor is configured to execute a program stored in the memory to control the receiver to receive data. The operating means of the memory device may further comprise a communication bus for establishing a connection between the processor, the memory and the receiver.

In a fifth aspect, there is provided a computer readable storage medium having instructions stored therein which, when run on a computer, cause the computer to perform the receiver selection method of the first or second aspect described above.

In a sixth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the receiver selection method of the first or second aspect described above.

The technical effects obtained by the third aspect, the fourth aspect, the fifth aspect and the sixth aspect are similar to the technical effects obtained by the corresponding technical means in the first aspect or the second aspect, and are not described in detail herein.

The beneficial effects that this application provided technical scheme brought include at least:

in the embodiment of the application, the air interface environment analysis result can represent the channel characteristics between one or more STAs and the wireless device, the wireless device can automatically select the receiver for receiving the data according to the air interface environment analysis result, the selection method is simple, and the switching efficiency of the receiver is high.

Drawings

Fig. 1 is a diagram of an implementation environment involved in a receiver selection method according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a wireless device according to an embodiment of the present application;

fig. 3 is a flowchart of a receiver selection method provided in an embodiment of the present application;

fig. 4 is a flowchart of another receiver selection method provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of another wireless device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of yet another wireless device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is an implementation environment diagram related to a receiver selection method according to an embodiment of the present application. As shown in fig. 1, the implementation environment includes: wireless device 01 and one or more STAs 02. Wherein each STA 02 communicates with a wireless device 01 over a wireless network.

In one possible scenario, the wireless device 01 is an Access Point (AP) in a wireless local area network (wireless local area network, WLAN). An AP, also known as a hotspot or the like, is an access point where a mobile user enters a wired network. Wherein the AP may access a wired network and provide a wireless interface to STA 02. The STA 02 accesses the network through the wireless interface provided by the AP1, and further communicates with other network devices through the network. The AP may be a network device with a WLAN chip, such as a routing switch access device that provides AP functionality or services.

Optionally, the wireless device 01 is a base station in a long term evolution (long term evolution, LTE) network or a fifth generation mobile communication technology (5th generation mobile networks,5G) network.

STA02 is a wireless communication chip, a wireless sensor, a wireless communication terminal, or the like. For example: mobile phones, tablet computers, set-top boxes, smart televisions, smart wearable devices, vehicle-mounted communication devices and computers supporting wireless communication functions.

In the embodiment of the present application, the wireless device 01 selects a receiver for receiving data transmitted by each STA02 according to the acquired air interface environment analysis result. The air interface environment analysis result can represent the channel characteristics between the STA02 and the wireless device 01, so that the wireless device 01 can automatically select a receiver for receiving data according to the change condition of the air interface environment, the selection method is simple, and the switching efficiency of the receiver is high.

In some possible examples, when the STA has multiple receivers, the receiver selection method provided in the embodiments of the present application can also be applied to the STA to implement automatic selection switching of the receivers in different air interface environments.

Fig. 2 is a schematic structural diagram of a wireless device according to an embodiment of the present application. Illustratively, the wireless device 01 of fig. 1 may be implemented by the wireless device shown in fig. 2. Referring to fig. 2, the wireless device includes a processor 201 and a transceiver 202, and optionally, a communication bus 203 and a memory 204.

The processor 201 may be a general purpose Central Processing Unit (CPU), microprocessor, or one or more integrated circuits for controlling the execution of programs in accordance with aspects of the present application.

In one possible implementation, transceiver 202 includes a plurality of receivers including at least two of an MLD receiver, an IRC receiver, and an MMSE receiver. The plurality of receivers may be a plurality of receiving circuits integrated on one chip for implementing different receiver functions, or may be a plurality of independent receiving circuits. The multiple receivers are configured to receive data and/or signaling transmitted by one or more STAs and to receive data and/or signaling transmitted by other wireless devices. The plurality of receivers may also be a plurality of receiver algorithms in the transceiver 202, and the transceiver 202 is capable of loading any one of the plurality of receiver algorithms for data reception, such that the transceiver 202 is implemented as a receiver corresponding to the respective receiver algorithm. Wherein the plurality of receiver algorithms includes at least two of an MLD receiver algorithm, an IRC receiver algorithm, and an MMSE receiver algorithm.

Alternatively, communication bus 203 may include a pathway to transfer information between the aforementioned components.

Alternatively, memory 204 may be, but is not limited to, read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, random access Memory (random access Memory, RAM)) or other type of dynamic storage device that can store information and instructions, but may also be electrically erasable programmable read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), compact disc read-Only Memory (Compact Disc Read-Only Memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 203 may be stand alone and be coupled to the processor 201 via the communication bus 202. Memory 203 may also be integrated with processor 201.

The processor 201, as one embodiment, includes one or more CPUs.

The wireless device, as one embodiment, further includes an output device (not shown) and an input device (not shown). The output device communicates with the processor 201 to display information in a variety of ways. For example, the output device is a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device communicates with the processor 201 to receive user input in a variety of ways. For example, the input device is a mouse, a keyboard, a touch screen device, a sensing device, or the like.

The memory 204 is used for storing program codes for executing the embodiments of the present application, and is controlled by the processor 201 to execute the program codes. The processor 201 is configured to execute program code (not shown) stored in the memory 204. One or more software modules may be included in the program code. The wireless device shown in fig. 1 enables receiver selection by one or more software modules in the processor 201 and program code in the memory 204.

Next, a receiver selection method provided in an embodiment of the present application will be described.

Fig. 3 is a flowchart of a receiver selection method according to an embodiment of the present application. The method is applied to the wireless device shown in fig. 1. Referring to fig. 3, the method includes the steps of:

step 301: the wireless device obtains an air interface environment analysis result that characterizes channel characteristics between the one or more STAs and the wireless device.

In the embodiment of the application, a Physical (PHY) layer of the wireless device receives a physical layer protocol data unit (physicalprotocol data unit, PPDU) sent by one or more STAs, and obtains an air interface environment analysis result according to the received PPDU. Wherein the air interface environment analysis result includes one or more of data stream numbers supported by an air interface environment between the one or more STAs and the wireless device and interference signal indicators of the PPDU. Wherein, the interference signal index of the PPDU is used for representing the interference magnitude of the PPDU received by signals of other channels.

In one possible implementation, the wireless device measures the received PPDU to obtain the air interface environment analysis result. Wherein the number of PPDUs is 1 or more than 1.

Illustratively, the STA inserts a training sequence for channel estimation when transmitting the PPDU. When the number of PPDUs is 1, the wireless device performs channel estimation according to the training sequence of one PPDU after receiving the PPDU, thereby obtaining a channel estimation result. The channel estimation result includes a channel matrix for characterizing the channel characteristics. And determining the number of the effective eigenvalues of the channel matrix, and taking the number of the effective eigenvalues as the number of data streams supported by an air interface environment between the STA and the wireless equipment. The effective eigenvalue refers to an eigenvalue satisfying a preset condition among the eigenvalues of the channel matrix. The preset condition means that the ratio between the corresponding eigenvalue and the largest eigenvalue in the eigenvalues of the channel matrix is larger than a preset value.

In addition, when the wireless device receives the PPDU, the covariance matrix corresponding to the PPDU is determined according to the PPDU. And determining an interference signal index of the PPDU according to the off-diagonal element energy and the diagonal element energy of the covariance matrix.

Illustratively, the wireless device determines the covariance matrix of the signal carrying the PPDU according to the following model (1).

Wherein Ruu refers to covariance matrix corresponding to the PPDU, N is sum of number of effective sub-carriers carrying the PPDU, H ₁ (k) Refers to the channel estimation result on the kth effective subcarrier before filtering, H ₂ (k) Refers to the channel estimation result on the kth effective subcarrier after filtering.

When the energy of the off-diagonal element of the covariance matrix is larger than the energy of the diagonal element, it is indicated that the PPDU is greatly interfered by signals of other channels. When the off-diagonal element energy of the covariance matrix is smaller relative to the diagonal element energy, it is indicated that the PPDU is less interfered by signals of other channels. Based on this, in the embodiment of the application, after determining the covariance matrix, the wireless device determines the interference signal index of the PPDU according to the off-diagonal element energy and the diagonal element energy of the covariance matrix.

Wherein in one possible implementation, the wireless device calculates a sum of squares of a modulus for each element on a non-diagonal in the covariance matrix, resulting in a first sum of squares by which non-diagonal element energies of the covariance matrix are characterized. The sum of squares of the modulus referring to each element on the diagonal of the covariance matrix is calculated to obtain a second sum of squares by which the energy of the diagonal elements of the covariance matrix is characterized. And calculating the ratio between the first square sum and the second square sum, and taking the ratio as an interference signal index of the PPDU.

In another possible implementation, the wireless device calculates an accumulated value of real and imaginary absolute values of non-diagonal elements in the covariance matrix to obtain a first accumulated value, and characterizes non-diagonal element energy of the covariance matrix by the first accumulated value. And calculating the absolute value of the real part and the absolute value of the imaginary part of the diagonal to obtain a second accumulated value, and characterizing the energy of the diagonal elements of the covariance matrix through the second accumulated value. And calculating a ratio between the first accumulated value and the second accumulated value, and taking the ratio as an interference signal index of the PPDU.

Optionally, when the number of PPDUs is greater than 1, the wireless device receives a plurality of PPDUs transmitted by one or more STAs in one statistical period. And for each PPDU, the wireless device carries out channel estimation according to the training sequence of the PPDU, thereby obtaining the channel estimation result of each PPDU. And taking the number of the effective eigenvalues of the channel matrix in the channel estimation result of each PPDU as the data stream number supported by the air interface environment corresponding to the corresponding PPDU. Meanwhile, when receiving each PPDU, the wireless device determines a corresponding covariance matrix of each PPDU according to the method described above. And determining the interference signal index of each PPDU according to the off-diagonal element energy and the diagonal element energy of the corresponding covariance matrix of each PPDU. Correspondingly, the air interface environment analysis result obtained by the wireless device comprises the data stream number supported by the air interface environment corresponding to each PPDU and the interference signal index of each PPDU.

It should be noted that, the number of valid eigenvalues in the foregoing is a manner of characterizing the number of data streams supported by the air interface environment between the STA and the wireless device in the embodiments of the present application. In some possible examples, the number of data flows supported by the air interface environment may also be characterized by other values. In addition, the two implementation manners for determining the interference signal indicator of the PPDU given above are only two possible examples given in the embodiments of the present application, and the wireless device may also determine the energy of the non-diagonal element and the energy of the diagonal element in the covariance matrix in other manners, so as to compare the energy of the non-diagonal element with the energy of the diagonal element, and determine the interference signal indicator according to the comparison result, which is not limited in the embodiments of the present application.

Optionally, after receiving the PPDU, the wireless device measures the received PPDU, and sends the measurement result PDU to other devices such as a controller, and the other devices analyze the measurement result of the PPDU, so as to obtain an air interface environment analysis result. The embodiments of the present application are not described herein.

Step 302: the wireless device selects a target receiver according to the air interface environment analysis result, wherein the target receiver is used for receiving data sent by one or more STAs.

After obtaining the air interface environment analysis result, the wireless device selects a target receiver from the plurality of candidate receivers according to the air interface environment analysis result. Because the air interface environment analysis result characterizes the channel characteristics between the STA and the wireless device, the wireless device selects the target receiver according to the air interface environment analysis result, which is equivalent to automatically selecting the receiver according to the channel characteristics, the selection method is simple, and the efficiency of selecting and switching the receiver is improved.

The candidate receivers in the embodiment of the application include an MLD receiver, an IRC receiver and an MMSE receiver, and accordingly, the selected target receiver is one of the above receivers. Wherein the plurality of candidate receivers are implemented by a plurality of different circuits comprised by the wireless device, i.e. the plurality of candidate receivers are a plurality of different hardware implemented receivers. Alternatively, the plurality of candidate receivers are implemented by a circuit of the wireless device using different receiver algorithms, i.e. the plurality of candidate receivers are receivers implemented by a hardware using different receiver algorithms.

As can be seen from the foregoing description in step 301, the air interface environment analysis result includes the number of data streams supported by the air interface environment corresponding to the PPDU currently received and/or the interference signal index of the PPDU. Or the air interface environment analysis result comprises the data stream number supported by the air interface environment corresponding to each PPDU in the plurality of PPDUs received in one statistical period and/or the interference signal index of each PPDU. For the results of the air interface environment analysis of different implementations, the method for selecting the target receiver in this step is also different.

When the air interface environment analysis result includes the data stream number supported by the air interface environment corresponding to the currently received PPDU, the wireless device determines the duty ratio of the data stream number supported by the air interface environment in the number of receiving antennas of the wireless device. If the duty cycle is greater than the first threshold, the MLD receiver is considered the target receiver.

Wherein the first threshold is 0.5 or another value. When the duty ratio of the number of data streams supported by the air interface environment to the number of receiving antennas of the wireless device is greater than a first threshold, it is indicated that the channel of the current PPDU is more suitable for multi-stream transmission. Because the MLD receiver is more suitable for eliminating inter-stream interference during multi-stream transmission and can achieve better receiving effect than the IRC receiver and the MMSE receiver, the MLD receiver is used as a target receiver to receive data transmitted subsequently by the STA transmitting the PPDU when the channel of the current PPDU is determined to be more suitable for multi-stream transmission.

When the air interface environment analysis result includes the interference signal index of the currently received PPDU, the wireless device judges whether the interference signal index of the PPDU is larger than a second threshold value. And if the interference signal index of the PPDU is greater than a second threshold value, the IRC receiver is taken as a target receiver.

Wherein, the interference signal index of the PPDU is used for representing the magnitude of interference suffered by the PPDU. When the interference signal indicator of the PPDU is characterized by a ratio of the off-diagonal element energy and the diagonal element energy of the covariance matrix, if the ratio is greater than a second threshold, it indicates that the off-diagonal element energy is greater relative to the diagonal element energy, i.e., the PPDU is more interfered by signals of other channels. In this case, since the IRC receiver is more suitable for canceling other signal interference than the MLD receiver and the MMSE receiver, the wireless device selects the IRC as a target receiver through which data transmitted later by the STA transmitting the PPDU is received.

When the air interface environment analysis result includes the data stream number supported by the air interface environment corresponding to the current received PPDU and the interference signal index of the PPDU, the wireless device determines the duty ratio of the data stream number supported by the air interface environment in the number of receiving antennas of the wireless device, and judges whether the interference signal index of the PPDU is larger than a second threshold value. If the number of data streams supported by the air interface environment corresponding to the PPDU is not greater than a first threshold and the interference signal index of the PPDU is not greater than a second threshold, the wireless device selects the MMSE receiver as the target receiver in consideration of the fact that the power consumption of the MMSE receiver is smaller than that of the MLD receiver and the IRC receiver. And receiving data which is transmitted by the STA transmitting the PPDU and is transmitted subsequently by the target receiver. If the number of data streams supported by the air interface environment corresponding to the PPDU is larger than a first threshold value and the interference signal index of the PPDU is larger than a second threshold value, the wireless device randomly selects one receiver from the MLD receiver and the IRC receiver as a target receiver. Alternatively, the wireless device selects one receiver from the MLD receiver and the IRC receiver as the target receiver according to other principles, such as a gain maximization principle.

Optionally, in some possible embodiments, before selecting the target receiver according to the air interface environment analysis result by the above method, if the STA sending the PPDU has an explicit power consumption requirement, for example, when the STA requires that the power consumption is lower than the reference power consumption threshold, the wireless device directly uses a receiver with lower power consumption, such as an MMSE receiver, as the target receiver.

When the air interface environment analysis result includes data stream numbers supported by the air interface environment corresponding to each of the plurality of PPDUs received in the current statistical period, the wireless device determines that the number of the supported data stream numbers in the receiving antennas of the wireless device is greater than the number of PPDUs with the ratio greater than a first threshold. For convenience of the subsequent description, this number will be referred to as a first number. If the ratio of the first number to the number of the received plurality of PPDUs is greater than a third threshold, the MLD receiver is considered a target receiver.

The first threshold is 0.5 or other values, and the third threshold is 0.7 or 0.8 or other values, which are not limited in this embodiment of the present application. When the ratio of the first number to the number of the received PPDUs is greater than the third threshold, it is indicated that the corresponding channels are more suitable for multi-stream transmission in the received PPDUs. In this case, the MLD receiver is taken as a target receiver, and data of all STAs communicating with the wireless device is received by the target receiver in the next statistical period, thereby mitigating inter-stream interference in most channels for multi-stream transmission.

Optionally, if the ratio of the first number to the number of the received plurality of PPDUs is not greater than the fifth threshold, and the receiver selected by the wireless device in the last statistical period of the current statistical period is an MLD receiver, the wireless device exits the MLD receiver in the next statistical period. Wherein the fifth threshold is equal to or less than the third threshold, e.g., the third threshold is 0.7 and the fifth threshold is 0.5.

When the air interface environment analysis result includes an interference signal indicator of each of the plurality of PPDUs received in the current statistical period, the wireless device determines a number of PPDUs having interference signal indicators greater than a second threshold. For convenience of the subsequent description, this number will be referred to as a second number. If the ratio of the second number to the number of the received plurality of PPDUs is greater than a fourth threshold, the IRC receiver is taken as a target receiver.

The fourth threshold is 0.7 or 0.8 or other values, which are not limited in this embodiment. When the ratio of the second number to the number of the received plurality of PPDUs is greater than the fourth threshold, it is indicated that the number of PPDUs of the plurality of PPDUs that are interfered by signals of other channels is greater. In this case, the IRC receiver is selected as a target receiver, and in the next statistical period, data of all STAs communicating with the wireless device is received by the target receiver, so that signal interference from other channels suffered by most signals is reduced.

Optionally, if the ratio of the second number to the number of the received plurality of PPDUs is not greater than the sixth threshold, and the receiver selected by the wireless device in the last statistical period of the current statistical period is an IRC receiver, the wireless device exits the IRC receiver in the next statistical period. Wherein the sixth threshold is equal to or less than the fourth threshold, e.g., the fourth threshold is 0.7 and the sixth threshold is 0.5.

When the air interface environment analysis result includes the data stream number and the interference signal index supported by the air interface environment corresponding to each of the plurality of PPDUs received in the current statistical period, the wireless device determines the first number and the second number. If the ratio of the first number to the number of the received plurality of PPDUs is not greater than the third threshold and the ratio of the second number to the number of the received plurality of PPDUs is not greater than the fourth threshold, selecting an MMSE receiver with lower power consumption as a target receiver, and receiving data transmitted by all STAs communicating with the wireless device through the MMSE receiver in a next statistical period.

In the embodiment of the application, the wireless device selects a target receiver for receiving data according to the acquired air interface environment analysis result. The air interface environment analysis result can represent the channel characteristics between one or more STAs and the wireless device, so that the selection of the target receiver according to the air interface environment analysis result is equivalent to the automatic selection of the receiver according to the channel characteristics between the STAs and the wireless device, the selection method is simple, and the switching efficiency of the receiver is improved. And, select the receiver according to the channel characteristic between STA and the wireless device can guarantee to adopt suitable receiver to carry out data reception in suitable environment, namely guarantee the demodulation performance of receiver and the matching of air interface environment to can improve wireless device's receipt income, improve user experience.

In addition, in the embodiment of the application, the air interface environment analysis result is obtained by the wireless device according to the PPDU measurement received in real time. Therefore, the receiver is selected for the STA corresponding to the PPDU according to the air interface environment analysis result, which is equivalent to selecting and switching the receiver according to the real-time change condition of the air interface environment between the STA and the wireless device, so that the timely linkage of the switching of the receiver and the change condition of the air interface environment is realized, and the air interface spectrum efficiency can be utilized to the maximum.

Finally, in the embodiment of the present application, the air interface environment analysis result may include a result obtained by the wireless device measuring multiple PPDUs in one statistical period. On the basis, the wireless device uniformly selects the receiver in the next statistical period for a plurality of STAs connected by the wireless device according to the statistical result in the statistical period, and the selection efficiency is higher.

Fig. 4 is a flowchart of another receiver selection method provided in an embodiment of the present application. The method is for the wireless device shown in fig. 1, see fig. 4, and comprises the steps of:

step 401: the wireless device uses multiple receivers to receive the data in turn.

In an embodiment of the present application, a medium access control (mediaaccess control, MAC) layer of a wireless device issues an indication of optimization to a PHY layer. After receiving the optimizing instruction, the PHY layer first randomly selects one of the plurality of receivers to receive data. When the duration of the data receiving of the receiver reaches the first duration, the PHY layer selects one receiver from the rest of the receivers except the receiver to receive the data, and so on, so that a plurality of receivers can receive the data in turn, wherein the duration of each receiver to receive the data is the first duration. Wherein the plurality of receivers refers to two or more receivers, and the plurality of receivers includes at least two of an MLD receiver, an IRC receiver, and an MMSE receiver.

It should be noted that, in the process of receiving PPDUs through each receiver, the PHY layer may report the preamble statistics result of the receiver and the data portion of the PPDUs received by the receiver to the MAC layer, so that the MAC layer determines the receiving effect of each receiver according to the preamble statistics result and/or the data portion of the receiver.

Wherein the PPDU includes a preamble part and a data part. The preamble of the PPDU includes a SIG field and a training sequence. In the embodiment of the application, the preamble statistical result of the receiver is determined according to the checking condition of cyclic redundancy check (cyclic redundancy check, CRC) of the SIG field in the PPDU received by the receiver.

Illustratively, for any one receiver, the PHY layer counts the number N1 of PPDUs through which the CRC of the SIG field in the PPDUs received by that receiver passes. And counting the number N2 of the PPDUs with the CRC of the SIG field not passing in the PPDUs received by the receiver. And uploading the N1 and N2 as the preamble statistical result of the receiver to the MAC layer.

For the data portion, since the PHY layer cannot determine whether the CRC of the data portion passes, in the embodiment of the present application, the PHY may directly upload the data portion in the received PPDU to the MAC layer, and the MAC determines the data portion receiving performance of the receiver according to the data portion.

In another possible implementation, the PHY layer directly reports, to the MAC layer, a CRC result of the SIG field in the PPDU received by the receiver and a data portion during reception of the PPDU by each receiver, where the CRC result is used to indicate whether the CRC of the corresponding SIG field passes.

Step 402: the wireless device changes a time period for receiving data using the plurality of receivers according to a reception effect of each of the plurality of receivers, wherein the time period for which the receiver having a good reception effect is used is longer.

Wherein the reception effect includes a preamble reception effect and/or a data portion reception performance.

After the MAC layer of the wireless device receives the preamble statistics result of the receiver reported by the PHY layer and the data portion of the PPDU received by the receiver, the MAC layer determines the receiving effect of each receiver according to the received preamble statistics result and/or the data portion of the PPDU, and further determines the receiver with the best receiving effect, that is, the target receiver, according to the receiving effect of each receiver.

In one possible implementation, the MAC layer determines a preamble reception effect of each receiver according to the received preamble statistics of each receiver, and further selects a target receiver from the plurality of receivers according to the preamble reception effect of each receiver.

Illustratively, for each receiver, the MAC layer first calculates a ratio of N2 to N1 included in the preamble statistics of each receiver. The preamble reception effect of the receiver is characterized by the ratio between N2 and N1. Since N2 refers to the number of PPDUs through which the CRC of the SIG field does not pass, and N1 refers to the number of PPDUs through which the CRC of the SIG field passes, the smaller the ratio between N2 and N1, the better the preamble reception effect of the receiver. Based on this, the MAC layer determines a minimum ratio from among the plurality of ratios, and takes the receiver corresponding to the minimum ratio as the target receiver.

In another possible implementation, the MAC layer determines a data portion reception performance of each receiver according to the received data portion of the PPDU of each receiver, and further selects a target receiver from the plurality of receivers according to the data portion reception performance of each receiver.

For any one of the receivers, the MAC layer counts the number N3 of PPDUs through which the CRC of the data portion in the PPDUs received by the receiver passes, as an example. And counting the number N4 of the PPDUs of which the CRC of the data part does not pass in the PPDUs received by the receiver. A ratio between N4 and N3 is determined by which the data portion reception performance of the receiver is characterized.

Since N4 is the number of PPDUs through which the CRC of the data portion does not pass, and N3 is the number of PPDUs through which the CRC of the data portion passes, the smaller the ratio between N4 and N3, the better the data portion receiving effect of the receiver is explained. Based on this, the MAC layer determines a minimum ratio from among the plurality of ratios, and takes the receiver corresponding to the minimum ratio as the target receiver.

As another example, for any one receiver, the MAC layer counts the number N3 of PPDUs for which the CRC of the data portion of the PPDUs received by the receiver passes. The total number of bytes of the MAC layer protocol data units (MAC Protocol Data Unit, MPDUs) in the N3 PPDUs is determined. The data portion reception performance of the receiver is characterized by counting the total number of bytes obtained. The MAC layer then takes the receiver with the largest total number of bytes as the target receiver. Alternatively, the MAC determines the total number of MPDUs in the N3 PPDUs, and characterizes the data portion reception performance of the receiver by the determined total number of MPDUs.

In other possible implementations, the MAC layer determines the receiving effect of the respective receiver according to the data portion of the PPDU and the preamble statistics received by the respective receiver.

For any one of the receivers, the MAC layer refers to the foregoing method, and counts N1, N2, N3, and N4 corresponding to each receiver, as an example. And calculating the sum of N1 and N3 to obtain a first value, and calculating the sum of N2 and N4 to obtain a second value. The combined reception effect of the preamble and data parts of the receiver is ensured by the ratio of the second value to the first value. And then, the MAC layer determines the minimum value from the calculated ratios corresponding to the plurality of receivers, and takes the receiver corresponding to the minimum value as the target receiver.

Or, as another example, for any one receiver, the MAC layer determines a ratio for characterizing the preamble reception effect of the receiver and a ratio for characterizing the reception performance of the data portion of the receiver with reference to the method described above. Then, the two ratios are weighted according to preset specific gravity, and the receiving effect of the receiver is ensured through the weighted value. Then, a minimum weight value is determined from the determined weight values corresponding to the plurality of receivers, and the receiver corresponding to the minimum weight value is taken as the target receiver.

Optionally, after the MAC layer of the wireless device receives the CRC result and the data portion of the SIG field reported by the PHY layer, the MAC layer determines the preamble statistics of the receiver by referring to the manner of determining the preamble statistics by the PHY layer described in step 401, and further determines the preamble receiving effect of the receiver according to the preamble statistics according to the method described above. Then, a target receiver is selected according to the preamble reception effect of each receiver.

Alternatively, the MAC layer may determine the data reception performance of the receiver directly according to the data portion of the received PPDU with reference to the method described above, and further select the target receiver according to the data portion reception performance of each receiver.

Alternatively, the MAC layer determines the preamble statistics of the receiver with reference to the manner in which the PHY layer determines the preamble statistics described in step 401. Thereafter, referring to the method described above, the preamble statistics and the data portion of the received PPDU are combined to determine the reception effect of the receiver.

After determining the target receiver, the MAC layer issues a receiver indication to the PHY layer. The PHY layer extends the duration of time for the target receiver to receive data after receiving the receiver indication.

In one possible example, the PHY layer extends the duration of the next time data is received by the target receiver. For example, if the original receiving duration of the target receiver is a first duration, the receiving duration is changed to a second duration when the target receiver receives data next time, where the second duration is longer than the first duration.

Alternatively, in another possible example, the PHY layer increases the reception duration of the target receiver by increasing the number of times data is received using the target receiver.

For example, the PHY layer receives data through the target receiver after receiving the receiver indication. And when the time length of the target receiver for receiving the data reaches the third time length, the MAC layer issues the optimizing instruction to the PHY layer again. The PHY layer determines the target receiver again by the method described above.

In the embodiment of the application, the receiver with good receiving effect is selected through the cooperation of the MAC layer and the PHY layer of the wireless equipment, so that the automatic selection and switching of the receiver are realized, and the method is simple and convenient and has high efficiency.

Referring to fig. 5, an embodiment of the present application provides a wireless device 500, the wireless device 500 comprising:

an obtaining module 501, configured to perform step 301 in the foregoing embodiment;

a selection module 502, configured to perform step 302 in the foregoing embodiment.

Optionally, the selecting module is configured to select one of candidate receivers as a target receiver, where the candidate receivers include at least two of an MLD receiver, an IRC receiver, and an MMSE receiver.

Optionally, the obtaining module 501 is configured to:

receiving a PPDU;

measuring the PPDU to obtain an air interface environment analysis result, the air interface environment analysis result including one or more of: data stream number supported by an air interface environment between one or more STAs and a wireless device, and an interference signal index of a PPDU.

Optionally, when the candidate receiver includes an MLD receiver, the air interface environment analysis result includes a number of data streams supported by the air interface environment, the selecting module 502 is configured to:

if the ratio of the number of data streams supported by the air interface environment to the number of receive antennas of the wireless device is greater than a first threshold, the MLD receiver is selected as the target receiver.

Optionally, when the candidate receiver includes an IRC receiver and the air interface environment analysis result includes an interference signal indicator of the PPDU, the selecting module 502 is configured to:

if the interference signal indicator of the PPDU is greater than the second threshold, selecting the IRC receiver as the target receiver.

Optionally, when the candidate receiver includes an MLD receiver, an IRC receiver, and an MMSE receiver, and the air interface environment analysis result includes the number of data streams supported by the air interface environment and an interference signal index of the PPDU, the selecting module 502 is configured to:

and if the ratio of the number of data streams supported by the air interface environment to the number of receiving antennas of the wireless device is not greater than a first threshold value and the interference signal index of the PPDU is not greater than a second threshold value, selecting the MMSE receiver as a target receiver.

Optionally, the number of PPDUs is greater than 1.

Optionally, when the candidate receiver includes an MLD receiver, the air interface environment analysis result includes a number of data streams supported by the air interface environment, the selecting module 402 is configured to:

determining the number of PPDUs, the ratio of the number of data streams supported by the corresponding air interface environment to the number of receiving antennas of the wireless equipment is larger than a first threshold value, so as to obtain a first number;

if the ratio of the first number to the total number of PPDUs is greater than a third threshold, the MLD receiver is selected as the target receiver.

Optionally, when the candidate receiver includes an IRC receiver and the air interface environment analysis result includes an interference signal indicator of the PPDU, the selecting module 402 is configured to:

determining the number of PPDUs with interference signal indexes larger than a second threshold value to obtain a second number;

if the ratio of the second number to the total number of PPDUs is greater than a fourth threshold, the IRC receiver is selected as the target receiver.

In summary, in the embodiment of the present application, the wireless device selects a target receiver for receiving data according to the acquired air interface environment analysis result. The air interface environment analysis result can represent the channel characteristics between one or more STAs and the wireless device, so that the selection of the target receiver according to the air interface environment analysis result is equivalent to the automatic selection of the receiver according to the channel characteristics between the STAs and the wireless device, the selection method is simple, and the switching efficiency of the receiver is improved. And, select the receiver according to the channel characteristic between STA and the wireless device can guarantee to adopt suitable receiver to carry out data reception in suitable environment, namely guarantee the demodulation performance of receiver and the matching of air interface environment to can improve wireless device's receipt income, improve user experience.

Referring to fig. 6, an embodiment of the present application provides a wireless device 600, the wireless device 600 comprising:

a receiving module 601, configured to perform step 401 in the foregoing embodiment;

a control module 602, configured to perform step 402 in the foregoing embodiment.

Optionally, the plurality of receivers are at least two of an MLD receiver, an IRC receiver, and an MMSE receiver.

Optionally, the reception effect includes at least one of a preamble reception effect and a data portion reception performance.

Optionally, the control module 602 is configured to:

and the time for the receiver with the best receiving effect to receive the data is prolonged.

Optionally, the control module 602 is configured to:

and the time length of the receiver with the best receiving effect for receiving the data next time is prolonged.

Optionally, the control module 602 is configured to:

the number of times of receiving data using the receiver with the best receiving effect is increased.

In the embodiment of the application, the wireless device selects the receiver with good receiving effect by alternately using each receiver to receive data, so that the automatic selection and switching of the receiver are realized, and the method is simple and convenient and has high efficiency.

It should be noted that: in the wireless device provided in the above embodiment, when the receiver is selected, only the division of the above functional modules is used as an example, in practical application, the above functional allocation may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to perform all or part of the functions described above. In addition, the wireless device and the receiver selecting method provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the wireless device and the receiver selecting method are detailed in the method embodiments and are not repeated herein.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, data subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., digital versatile Disk (Digital Versatile Disc, DVD)), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above embodiments are provided for the purpose of not limiting the present application, but rather, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims

1. A receiver selection method, the method comprising:

the wireless device obtains an air interface environment analysis result, wherein the air interface environment analysis result is used for representing channel characteristics between one or more station STAs and the wireless device;

the wireless device selects a target receiver according to the air interface environment analysis result, wherein the target receiver is used for receiving data sent by the one or more STAs;

the selection target receiver includes: selecting one of candidate receivers as a target receiver, wherein the candidate receivers are at least two of a Maximum Likelihood Detection (MLD) receiver, an Interference Rejection Combining (IRC) receiver and a Minimum Mean Square Error (MMSE) receiver;

The wireless device obtaining the air interface environment analysis result comprises the following steps: the wireless device receives a physical layer protocol data unit (PPDU); the wireless device measures the PPDU to obtain the air interface environment analysis result, the air interface environment analysis result including one or more of: and the data stream number supported by the air interface environment between the one or more STAs and the wireless device and the interference signal index of the PPDU.

2. The method of claim 1, wherein when the candidate receiver comprises an MLD receiver and the air interface environment analysis result comprises a number of data streams supported by the air interface environment, the wireless device selects a target receiver according to the air interface environment analysis result, comprising:

the wireless device selects the MLD receiver as the target receiver if a ratio of the number of data streams supported by the air interface environment to the number of receive antennas of the wireless device is greater than a first threshold.

3. The method of claim 1, wherein when the candidate receiver comprises an IRC receiver, and the air interface environment analysis result comprises an interference signal indicator of the PPDU, the wireless device selects a target receiver according to the air interface environment analysis result, comprising:

If the interference signal indicator of the PPDU is greater than a second threshold, the wireless device selects the IRC receiver as the target receiver.

4. The method of claim 1, wherein when the candidate receiver comprises an MLD receiver, an IRC receiver, and an MMSE receiver, the air environment analysis result includes a number of data streams supported by the air environment and an interference signal index of the PPDU, the wireless device selects a target receiver according to the air environment analysis result, comprising:

and if the ratio of the number of data streams supported by the air interface environment to the number of receiving antennas of the wireless device is not greater than a first threshold value and the interference signal index of the PPDU is not greater than a second threshold value, the wireless device selects the MMSE receiver as the target receiver.

5. The method of claim 1, wherein when the candidate receiver comprises an MLD receiver and an MMSE receiver, the air interface environment analysis result comprises a number of data streams supported by the air interface environment, and the wireless device selects a target receiver according to the air interface environment analysis result, comprising:

if the ratio of the number of data streams supported by the air interface environment to the number of receiving antennas of the wireless device is not greater than a first threshold, the wireless device selects the MMSE receiver as the target receiver.

6. The method of claim 1, wherein when the candidate receiver comprises an IRC receiver and an MMSE receiver, the air interface environment analysis result comprises an interference signal indicator of the PPDU, and the wireless device selects a target receiver according to the air interface environment analysis result, comprising:

if the interference signal indicator of the PPDU is not greater than a second threshold, the wireless device selects the MMSE receiver as the target receiver.

7. The method of claim 1, wherein the number of PPDUs is greater than 1.

8. The method of claim 7, wherein when the candidate receiver comprises an MLD receiver and the air interface environment analysis result comprises a number of data streams supported by the air interface environment, the wireless device selects a target receiver according to the air interface environment analysis result, comprising:

the wireless device determines the number of PPDUs of which the ratio of the number of data streams supported by the corresponding air interface environment to the number of receiving antennas of the wireless device is larger than a first threshold value, and obtains the first number;

the wireless device selects the MLD receiver as the target receiver if a ratio of the first number to a total number of PPDUs is greater than a third threshold.

9. The method of claim 7, wherein when the candidate receiver comprises an IRC receiver, and the air interface environment analysis result comprises an interference signal indicator of the PPDU, the wireless device selects a target receiver according to the air interface environment analysis result, comprising:

the wireless device determines the number of PPDUs with interference signal indexes larger than a second threshold value to obtain a second number;

if the ratio of the second number to the total number of PPDUs is greater than a fourth threshold, the wireless device selects the IRC receiver as the target receiver.

10. A wireless device, the wireless device comprising:

the acquisition module is used for acquiring an air interface environment analysis result, wherein the air interface environment analysis result is used for representing channel characteristics between one or more station STAs and the wireless equipment;

the selection module is used for selecting a target receiver according to the air interface environment analysis result, wherein the target receiver is used for receiving data sent by the one or more STAs;

the selection module is used for: selecting one of candidate receivers as the target receiver, wherein the candidate receivers comprise at least two of a Maximum Likelihood Detection (MLD) receiver, an Interference Rejection Combining (IRC) receiver and a Minimum Mean Square Error (MMSE) receiver;

The acquisition module is used for: receiving a physical layer protocol data unit (PPDU); measuring the PPDU to obtain the air interface environment analysis result, the air interface environment analysis result including one or more of: and the data stream number supported by the air interface environment between the one or more STAs and the wireless device and the interference signal index of the PPDU.

11. The wireless device of claim 10, wherein when the candidate receiver comprises an MLD receiver, the air interface environment analysis result comprises a number of data streams supported by the air interface environment, the selection module is configured to:

and if the ratio of the number of data streams supported by the air interface environment to the number of receiving antennas of the wireless device is greater than a first threshold, selecting an MLD receiver as the target receiver.

12. The wireless device of claim 10, wherein when the candidate receiver comprises an IRC receiver, the air interface environment analysis result comprises an interference signal indicator of the PPDU, the selection module is configured to:

and if the interference signal index of the PPDU is larger than a second threshold value, selecting an IRC receiver as the target receiver.

13. The wireless device of claim 10, wherein when the candidate receiver comprises an MLD receiver, an IRC receiver, and an MMSE receiver, the air environment analysis result includes a number of data streams supported by the air environment and an interference signal indicator of the PPDU, the selecting module is configured to:

And if the ratio of the number of data streams supported by the air interface environment to the number of receiving antennas of the wireless device is not greater than a first threshold value and the interference signal index of the PPDU is not greater than a second threshold value, selecting an MMSE receiver as the target receiver.

14. The wireless device of claim 10, wherein the number of PPDUs is greater than 1.

15. A wireless device comprising a processor and a transceiver, the transceiver comprising at least two candidate receivers, the processor configured to perform the receiver selection method of any of claims 1-9 to control the target receiver to receive data.

16. A computer readable storage medium having instructions stored therein which, when executed on a computer, cause the computer to perform the receiver selection method of any of claims 1-9.