Antenna angle determination method and device and nonvolatile storage medium

Abstract

The invention discloses an antenna angle determination method and device and a nonvolatile storage medium. The method comprises the following steps: acquiring a matrix parameter of a spatial channel matrix between an access point antenna and a station; a spatial mapping matrix is determined based on a limiting function and the spatial channel matrix, the limiting function is used for limiting the maximum value of elements in the spatial mapping matrix, and the maximum value is set based on the maximum output power of a radio frequency amplifier in the access point; on the basis of the spatial channel matrix and the spatial mapping matrix, an objective function used for representing the station receiving power is constructed, and the objective function is a function with the antenna gain of the access point as an independent variable; and determining a target antenna angle according to the angle corresponding to the antenna gain with the maximum target function value in the plurality of antenna gains of the access point. According to the invention, the technical problems of long time consumption and low efficiency caused by adopting a traversal method to adjust the antenna angle in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the field of antenna adjustment, and in particular to an antenna angle determination method, device and non-volatile storage medium. Background Art

[0002] The angle of the antenna affects the loss of signal transmission. Currently, the antenna adjustment algorithm searches for the path with the least spatial loss by switching or rotating the antenna, which is time-consuming and has low adjustment efficiency.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a method, device and non-volatile storage medium for determining an antenna angle, so as to at least solve the technical problem in the related art that the traversal method is used to adjust the antenna angle, resulting in a long time consumption and low efficiency.

[0005] According to one aspect of an embodiment of the present invention, a method for determining an antenna angle is provided, including: obtaining matrix parameters of a spatial channel matrix between an access point antenna and a site; determining a spatial mapping matrix based on a restriction function and the spatial channel matrix, wherein the restriction function is used to limit the maximum value of elements in the spatial mapping matrix, and the maximum value is set based on a maximum output power of a radio frequency amplifier in the access point; constructing an objective function for characterizing site received power based on the spatial channel matrix and the spatial mapping matrix, wherein the objective function is a function with an antenna gain of the access point as an independent variable; and determining a target antenna angle according to an angle corresponding to an antenna gain having a maximum value of the objective function among multiple antenna gains of the access point.

[0006] Optionally, based on the restriction function and the spatial channel matrix, a spatial mapping matrix is ​​determined, including: determining an inverse matrix of the spatial channel matrix as a first initial spatial mapping matrix; or determining a quasi-inverse matrix of the spatial channel matrix as the first initial spatial mapping matrix; and adjusting the first initial spatial mapping matrix according to the restriction function to obtain the spatial mapping matrix.

[0007] Optionally, when the inverse matrix of the spatial channel matrix is ​​the first initial spatial mapping matrix, the objective function is a function set with the trace maximum of the product of the spatial channel matrix and the spatial mapping matrix as the objective.

[0008] Optionally, when the quasi-inverse matrix of the spatial channel matrix is ​​the first initial spatial mapping matrix, the objective function includes a first sub-function and a second sub-function, wherein the first sub-function represents the sum of the received powers corresponding to each of the multiple sub-channels in the site, and the second sub-function represents the difference in the received powers corresponding to any two of the multiple sub-channels in the site.

[0009] Optionally, obtaining matrix parameters of a spatial channel matrix from an access point antenna to a site includes: controlling the antenna of the access point to send a detection signal to the site at an initial antenna angle; receiving an initial channel matrix generated by the site based on the detection signal, wherein the initial channel matrix is ​​used to characterize the channel loss between the access point and the site at the initial antenna angle; and determining the matrix parameters of the spatial channel matrix between the access point and the site based on the initial channel matrix and the antenna gain corresponding to the initial antenna angle.

[0010] Optionally, controlling the antenna of the access point to send the detection signal to the site at an initial antenna angle includes: determining the second initial space mapping matrix as a unit matrix; and controlling the antenna of the access point to send the detection signal to the site at the initial antenna angle based on the second initial space mapping matrix.

[0011] According to another aspect of an embodiment of the present invention, there is also provided an antenna angle determination device, including: an acquisition module, used to acquire matrix parameters of a spatial channel matrix between an access point antenna and a site; a first determination module, used to determine a spatial mapping matrix based on a restriction function and the spatial channel matrix, wherein the restriction function is used to limit the maximum value of elements in the spatial mapping matrix, and the maximum value is set based on a maximum output power of a radio frequency amplifier in the access point; a construction module, used to construct an objective function for characterizing the received power of the site based on the spatial channel matrix and the spatial mapping matrix, wherein the objective function is a function with the antenna gain of the access point as an independent variable; and a second determination module, used to determine the target antenna angle according to the angle corresponding to the antenna gain having the largest value of the objective function among multiple antenna gains of the access point.

[0012] According to another aspect of an embodiment of the present invention, a non-volatile storage medium is provided, the non-volatile storage medium including a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute any one of the above-mentioned antenna angle determination methods.

[0013] According to yet another aspect of an embodiment of the present invention, a computer device is provided. The computer device includes a processor, and the processor is used to run a program. When the program is run, any one of the above-mentioned antenna angle determination methods is executed.

[0014] According to yet another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, any one of the above-mentioned antenna angle determination methods is implemented.

[0015] In an embodiment of the present invention, an antenna angle determination method is adopted to obtain matrix parameters of a spatial channel matrix between an access point antenna and a site; a spatial mapping matrix is ​​determined based on a restriction function and a spatial channel matrix, wherein the restriction function is used to limit the maximum value of elements in the spatial mapping matrix, and the maximum value is set based on the maximum output power of a radio frequency amplifier in the access point; an objective function for characterizing the received power of the site is constructed based on the spatial channel matrix and the spatial mapping matrix, wherein the objective function is a function with the antenna gain of the access point as an independent variable; a target antenna angle is determined according to an angle corresponding to an antenna gain with the largest value of the objective function among multiple antenna gains of the access point, thereby achieving the purpose of quickly determining the target antenna angle, thereby realizing the technical effect of improving the antenna adjustment efficiency, and further solving the technical problem of using a traversal method to adjust the antenna angle in the related art, which results in a long time consumption and low efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 is a schematic diagram of a flow chart of a method for determining an antenna angle according to an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of antenna transmission and reception according to a method for determining an antenna angle provided in an optional embodiment of the present invention;

[0019] Figure 3 is a structural block diagram of an antenna angle determination device provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0022] First, some nouns or terms that appear in the description of the embodiments of the present application are subject to the following interpretations:

[0023] The spatial channel matrix is ​​a matrix that describes the channel characteristics between the transmitter and the receiver in a multi-antenna system. It represents the ratio of the amplitude phase of the receiving antenna to the amplitude phase of the signal at the transmitting antenna. In a MIMO (multiple input multiple output) system, this matrix is ​​used to describe the channel characteristics from each transmitting antenna to each receiving antenna. The spatial channel matrix usually contains the path gain, delay, and spatial correlation information of the channel.

[0024] The spatial mapping matrix is ​​a matrix used to optimize signal transmission in a MIMO (Multiple Input Multiple Output) system. This matrix is ​​used to adjust the spatial characteristics of the transmitted signal to maximize the transmission quality of the signal or minimize interference.

[0025] According to an embodiment of the present invention, a method embodiment of an antenna angle determination method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0026] Data can be transmitted between the access point (AP) and the station (STA) through the antenna. Usually, the access point acts as a transmitter to send signals to the station. However, there is usually a certain amount of channel loss during the transmission process. The angle of the antenna on the access point is different, and the channel loss during the corresponding transmission process may also be different. Therefore, before transmitting the signal, it is necessary to find a suitable antenna angle. Currently, the antenna angle is usually adjusted by the traversal method, which is time-consuming and results in low antenna adjustment efficiency. Based on this technical problem, an embodiment of the present invention proposes an antenna angle determination method. Figure 2is a flow chart of a method for determining an antenna angle according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0027] Step S102: Obtain matrix parameters of a spatial channel matrix between an access point antenna and a site.

[0028] In this step, the matrix parameters of the spatial channel matrix between the access point antenna and the site are obtained, where the spatial channel matrix is ​​used to indicate the channel characteristics between these two points. This matrix captures the spatial characteristics of the signal during transmission from the access point to the site, including multipath effects such as signal attenuation, reflection, refraction, and scattering. The elements in the matrix represent the characteristics of different channels. Taking a 2x2 antenna transceiver system as an example, the spatial channel matrix is is the channel characteristic corresponding to the signal from the jth transmitting antenna to the ith receiving antenna, that is, the path loss, phase change, delay and other information experienced by the signal. The matrix parameters here are parameter variables that affect the signal transmission performance, such as the distance between antennas, the speed of light, the frequency of the signal, etc. The parameter values ​​corresponding to the matrix parameters can be obtained in advance by transmitting a detection signal to the site through the access point antenna, or by measurement and other methods.

[0029] Obtaining the matrix parameters of the spatial channel matrix between the access point antenna and the site can control the antenna of the access point to send a detection signal to the site at an initial antenna angle; receiving the initial channel matrix generated by the site based on the detection signal, wherein the initial channel matrix is ​​used to characterize the channel loss between the access point and the site at the initial antenna angle; determining the matrix parameters of the spatial channel matrix between the access point and the site according to the initial channel matrix and the antenna gain corresponding to the initial antenna angle.

[0030] The access point (AP) can send a detection signal to the station (STA) at an initial antenna angle, where the initial antenna angle can be any angle. The detection signal sent is used to detect the state of the channel between the access point and the station, so the detection signal can be a data-free detection frame NDP. The data-free detection frame does not carry actual data load and can be used to detect and evaluate the channel. Among them, the initial antenna angle will correspond to an antenna gain, and the antenna angle of the access point corresponds to the antenna gain of the transmitter.

[0031] When the antenna on the access point is controlled to send a detection signal to the site at the initial antenna angle, the initial space mapping matrix can be controlled to be a unit matrix, and then the detection signal is sent to the site based on the initial space mapping matrix. For example, the access point can first set the space mapping matrix to the unit matrix, based on sending a data-free detection frame NDP to the site. Among them, NDP is a protocol used for communication and discovery between antennas and other devices in a wireless network. When the space mapping matrix is ​​a unit matrix, it means that the antenna configurations of the transmitter and the receiver are corresponding, that is, each transmitting antenna corresponds to one receiving antenna. This configuration makes the signal processing at the receiving end relatively simple in a MIMO (Multiple-Input Multiple-Output) system, because each receiving antenna can directly correspond to the signal of a transmitting antenna, and there is no need for complex correspondence between transmitting and receiving antennas, as well as complex demodulation and signal separation processes, which reduces the complexity of system implementation and operation. Therefore, when sending a detection signal, setting the space mapping matrix to the unit matrix can reduce the complexity, making it easier for the receiving end to perform channel estimation after receiving the detection signal.

[0032] After receiving the detection signal, the station (STA) generates an initial channel matrix based on the detection signal and feeds it back to the station (AP), wherein the initial channel matrix can represent the channel loss between the access point and the station at the initial antenna angle. The station can use the long training sequence method to perform channel estimation and generate the initial channel matrix. The long training sequence method is a method for channel estimation in wireless communication, wherein the transmitted long training sequence can be known to the transmitter and the receiver. For example, the data-free detection frame (also called training frame, detection signal or synchronization sequence) can also be generally known to both the transmitter and the receiver of the wireless communication system. Therefore, when using the long training sequence for channel estimation, the transmitter (access point) can send a known long training sequence (data-free detection frame) at the beginning of the communication. The signal received by the receiver (station) is the result of the long training sequence being affected by the channel. The receiver uses the known long training sequence (known data-free detection frame) to compare with the received signal (received data-free detection frame). This comparison can be achieved by a matched filter to extract the influence of the channel. By comparing the known training sequence with the received signal, the response of the channel can be estimated. Channel estimation can be performed using a variety of methods, such as least squares estimation, maximum likelihood estimation, etc. In a multiple-input multiple-output (MIMO) system, a spatial channel matrix can be extracted. The spatial channel matrix is ​​a mathematical model that describes the propagation characteristics of signals in space in wireless communications, and describes the transmission characteristics between the transmitting antenna and the receiving antenna. The initial channel matrix is ​​the spatial channel matrix corresponding to the channel at the initial antenna angle, which represents the channel loss between the access point and the station at the initial antenna angle.

[0033] Based on the initial channel matrix and the antenna gain corresponding to the initial antenna angle, the matrix parameters of the spatial channel matrix between the access point and the station can be determined. The Friis transmission formula is a basic formula for calculating the received signal power between two antennas, which describes the propagation loss of signals in wireless communication systems. The matrix parameters of the spatial channel matrix between the access point and the station can be determined based on the Friis transmission formula. Figure 2 is a schematic diagram of antenna transmission and reception according to an antenna adjustment method provided in an optional embodiment of the present invention, such as Figure 2 As shown, a 2x2 antenna transceiver system is used as an example, where the access point (AP) has two transmitters x 1 、x 2 , the station (STA) has two receiving ends y 1 ,y 2 , the transmission process of the antenna can be expressed as Among them, the spatial channel matrix is Space Mapping Matrix is the mapping relationship between the signal from the jth transmitting antenna to the ith receiving antenna, which usually involves adjusting the amplitude, phase and beam direction of the signal; the signal sent by the transmitter is The signal received by the receiving end is According to the Friis transmission formula Determine the matrix parameters, where H 2×2 is the spatial channel matrix, c is the speed of light, f is the frequency of the transmitted signal, It represents the antenna gain of the channel from the j-th transmitting antenna to the i-th receiving antenna at the receiving end (site). It represents the antenna gain of the transmitter (access point) from the jth transmitting antenna to the ith receiving antenna channel, and dij is the transmission distance from the jth transmitting antenna to the ith receiving antenna. Antenna gain is an indicator that measures the ability of an antenna to transmit or receive signals in a directional manner. Gain is usually expressed in decibels (dB) and is related to the ratio of the radiation intensity of the antenna in a specific direction to its radiation intensity in the case of isotropic radiation (non-directional). The parameters other than the antenna gain of the transmitter can be regarded as a whole, that is, matrix parameters, as shown in the formula Among them, the antenna gain corresponding to the initial antenna angle is substituted into the formula to obtain the matrix parameter Regardless of the angle of the access point antenna, the matrix parameters of the spatial channel matrix between the access point and the station are determined. That is, when the orientation of the access point antenna and the orientation of the station are determined, the matrix parameters of the spatial channel matrix between the two are determined.

[0034] Step S104: determining a spatial mapping matrix based on a restriction function and a spatial channel matrix, wherein the restriction function is used to restrict a maximum value of elements in the spatial mapping matrix, and the maximum value is set based on a maximum output power of a radio frequency amplifier in the access point.

[0035] There are many ways to determine the spatial mapping matrix, for example, determining the inverse matrix of the spatial channel matrix as the corresponding spatial mapping matrix, or determining the quasi-inverse matrix of the spatial channel matrix as the corresponding spatial mapping matrix. However, in actual situations, due to the very large loss of spatial propagation and the limited output power of the RF amplifier, the RF amplifier cannot process the signal based on the spatial mapping matrix in an ideal state. Therefore, it is necessary to set a restriction function to limit the element values ​​in the spatial mapping matrix based on the maximum output power of the RF amplifier. Among them, the RF amplifier is an electronic device used to amplify radio frequency signals. In wireless communication systems, RF amplifiers are usually used to enhance the signal strength of the transmitter so that when the transmitted signal is transmitted through the air, it can achieve sufficient coverage and sensitivity requirements of the receiver. Therefore, determining the spatial mapping matrix based on the restriction function and the spatial channel matrix can prevent the situation of exceeding the power range of the RF amplifier during signal transmission, thereby ensuring the stability and security of the system.

[0036] Step S106, based on the spatial channel matrix and the spatial mapping matrix, construct an objective function for characterizing the received power of the site, wherein the objective function is a function with the antenna gain of the access point as an independent variable. Since the antenna gain corresponds to the antenna angle, it can also be understood that the objective function is a function with the antenna angle of the access point as an independent variable.

[0037] Among them, the spatial mapping matrix is ​​used to describe the interaction between the elements in the antenna array and their impact on the signal. This matrix is ​​particularly important in multiple-input multiple-output (MIMO) systems because it contains information about the spatial channel. The spatial mapping matrix can be combined with the spatial channel matrix to describe the distribution and received power of the signal at the receiving end. During signal transmission, the signal first propagates through the channel represented by the spatial channel matrix, and then undergoes spatial transformation through the spatial mapping matrix. Combining these two matrices, the received power can be calculated. The received power depends on the transmit power, antenna gain, propagation loss, elements of the spatial channel matrix, and the adjustment of the spatial mapping matrix. Therefore, an objective function representing the received power of the station can be constructed based on the spatial channel matrix and the spatial mapping matrix, where the independent variable of the objective function is the antenna gain of the access point. Since the antenna gain corresponds to the antenna angle one by one, the antenna gain of the access point when the station reception effect is best can be selected based on the objective function, that is, the antenna angle of the antenna of the access point.

[0038] Step S108, determining a target antenna angle according to an angle corresponding to an antenna gain having a maximum value of an objective function among multiple antenna gains of the access point.

[0039] When selecting the target antenna angle according to the objective function, the objective of the objective function is to select the antenna gain when the site receives the maximum power. The corresponding antenna angle can be determined according to the antenna gain. Different antenna angles correspond to different antenna gains. Multiple antenna gains are sequentially brought into the objective function. The angle corresponding to the antenna gain with the maximum value of the objective function, that is, the maximum site receiving power, is taken as the target antenna angle. Among them, the antenna gain of the access point antenna can be measured using corresponding test equipment. For example, using professional antenna test equipment, such as a network analyzer, an antenna measurement system (such as a horn antenna or a turntable), and other auxiliary equipment, a standard reference antenna with a known gain can be used to scan the antenna of the access point in the horizontal and vertical planes, usually continuously from 0° to 360° or select specific discrete angle points. Then use a network analyzer or other receiving equipment to measure the received signal strength from the antenna to be tested. Compare the received signal strength with the signal strength received by the reference antenna to calculate the gain of the access point antenna relative to the reference antenna. Then determine the antenna gain of the access point antenna at different angles. When the conditions are met, find the target antenna angle corresponding to the antenna gain with the maximum objective function value, that is, the maximum received power, and adjust the antenna angle of the access point based on the target antenna angle, so as to achieve the technical effect of improving the signal power strength at the receiving end and thus improving the negotiation rate. By adjusting the antenna of the access point to the target antenna angle obtained according to the above method, the signal-to-noise ratio can be maximized, where the signal-to-noise ratio is an indicator of signal quality and noise level, and is usually used to describe the clarity of the signal during transmission or processing. The higher the signal-to-noise ratio, the better the signal quality and the lower the noise level.

[0040] Through the above steps, an objective function related to the antenna angle gain is constructed, the antenna gains corresponding to the antenna angles calculated in advance are substituted one by one, and the antenna angle corresponding to the antenna gain with the largest objective function value is selected as the target antenna angle, thereby achieving the purpose of quickly determining the target antenna angle, thereby achieving the technical effect of improving the antenna adjustment efficiency, and further solving the technical problem of using the traversal method to adjust the antenna angle in the related technology, which results in a long time consumption and low efficiency.

[0041] As an optional embodiment, the space mapping matrix may be determined according to the restriction function, which is described below with an example.

[0042] For example, the inverse matrix of the spatial channel matrix may be determined as the first initial spatial mapping matrix; the initial spatial mapping matrix may be adjusted according to the restriction function to obtain the spatial mapping matrix. The objective function may be a function set with the maximum trace of the product of the spatial channel matrix and the target spatial mapping matrix as the objective.

[0043] In order to achieve channel equalization, the inverse matrix of the spatial channel matrix can be selected as the spatial mapping matrix, that is, the product of the spatial channel matrix and the spatial mapping matrix is ​​the unit matrix. The spatial channel matrix and the spatial mapping matrix are inverse matrices of each other, which can offset the influence of the spatial channel matrix, that is, the channel loss. The product of the spatial channel matrix and the spatial mapping matrix is ​​the unit matrix, so that the No. 1 transmitting antenna can only send to the No. 1 receiving antenna, and the No. 2 transmitting antenna can only send to the No. 2 receiving antenna. Because the channel from the No. 1 transmitting antenna to the No. 2 receiving antenna and the channel from the No. 2 transmitting antenna to the No. 1 receiving antenna will have channel crossing, resulting in increased loss, so making the product of the spatial channel matrix and the spatial mapping matrix the unit matrix can avoid the phenomenon of channel crossing, and make the channel from the No. 1 transmitting antenna to the No. 1 receiving antenna and the channel from the No. 2 transmitting antenna to the No. 2 receiving antenna have the same receiving power, which helps to reduce the unevenness in signal transmission and improve the stability and reliability of the overall system. At the receiving end, by multiplying the spatial mapping matrix, the distorted or distorted signal can be readjusted to the form sent by the original transmitting end, thereby achieving channel equalization. In a 2x2 antenna transceiver system, the spatial channel matrix Let the space mapping matrix Q 2×2 is the spatial channel matrix H 2×2 The inverse matrix, that is, H 2×2 Q 2×2 is the unit matrix, then in a 2x2 antenna transceiver system, the spatial mapping matrix However, in actual situations, due to the large loss of spatial propagation and the limited RF amplifier, the RF amplifier cannot process the signal based on the spatial mapping matrix obtained above. Among them, the RF amplifier is an electronic device used to amplify radio frequency signals. In wireless communication systems, RF amplifiers are usually used to enhance the signal strength of the transmitter so that when the transmitted signal is transmitted through the air, it can achieve sufficient coverage and sensitivity requirements of the receiver. That is, the spatial mapping matrix takes the inverse matrix of the spatial channel matrix as an ideal state, but it cannot be satisfied in actual situations. Therefore, it is necessary to set a restriction function to restrict the spatial mapping matrix so that the spatial mapping matrix is ​​within the range that the RF amplifier can carry. Among them, the restriction function can be set to Among them, γ is the adjustment parameter of the limit function, m is the maximum value of the elements in the space mapping matrix, and the value of m is related to the RF amplifier in the access point. The better the performance of the RF amplifier, the larger the value of m. For example, the maximum value of the elements in the space mapping matrix can be set to 1, that is, the limit function can be set to According to the restriction function, γ can be obtained. The spatial mapping matrix can be obtained by multiplying the initial spatial mapping matrix determined by the inverse matrix of the spatial channel matrix by γ. The objective function can be constructed according to the spatial channel matrix and the spatial mapping matrix. For example, the trace of the product of the spatial channel matrix and the spatial mapping matrix is ​​used as the objective function, that is, max(tr(HQ)), and the maximum trace of the product of the spatial channel matrix and the spatial mapping matrix is ​​used as the goal. The trace of the product of the spatial channel matrix and the spatial mapping matrix can be used as an effective indicator of the total power of the receiving end, because it reflects the signal transmission and power allocation process from the transmitter to the receiver in the entire signal transmission link.

[0044] For another example, before constructing an objective function for characterizing the site receiving power based on the spatial channel matrix and the spatial mapping matrix, the spatial mapping matrix can be obtained in the following manner: determine a quasi-inverse matrix of the spatial channel matrix as an initial spatial mapping matrix; and adjust the initial spatial mapping matrix based on a restriction function to obtain the spatial mapping matrix.

[0045] The objective function includes a first objective function and a second objective function, wherein the first objective function represents the sum of the receiving powers corresponding to each of the multiple subchannels in the site, and the second objective function represents the difference in the receiving powers corresponding to any two of the multiple subchannels in the site.

[0046] The spatial mapping matrix can also be a quasi-inverse matrix of the spatial channel matrix. Compared with taking the inverse matrix of the spatial channel matrix as the spatial mapping matrix, the quasi-inverse matrix has fewer requirements for the spatial channel matrix, and the power at the receiving end can reach a larger value, which is easier to implement. Transmit antenna No. 1 can only send to receive antenna No. 1, and transmit antenna No. 2 can only send to receive antenna No. 2. Because the channel from transmit antenna No. 1 to receive antenna No. 2 and the channel from transmit antenna No. 2 to receive antenna No. 1 will cross the channel, resulting in increased loss, so the product of the spatial mapping matrix and the spatial channel matrix is ​​a diagonal matrix, which can avoid the phenomenon of channel crossing. However, unlike the inverse matrix, when the spatial mapping matrix is ​​a quasi-inverse matrix of the spatial channel matrix, the receiving power corresponding to the channel from transmit antenna No. 1 to receive antenna No. 1 and the channel from transmit antenna No. 2 to receive antenna No. 2 may not be exactly the same. Therefore, when setting the objective function later, the imbalance of the two channels can be taken into account. Taking the minimum imbalance as the goal helps to reduce the unevenness in signal transmission and improve the stability and reliability of the overall system. Taking a 2x2 antenna transceiver system as an example, the product of the spatial mapping matrix and the spatial channel matrix is The spatial mapping matrix can be obtained Similarly, since the loss of spatial propagation is very large and the RF amplifier is limited, a restriction function can be set here so that the processing of the signal by the spatial mapping matrix is ​​within the working range of the RF amplifier. For example, the restriction function can be Among them, n can be determined according to the performance of the RF amplifier in actual situations. For example, the maximum value of the elements in the space mapping matrix can be set to 1, and the limit function can be set to The received power of the site can then be calculated Among them, P r is the received power, P t is the transmission power, and we can get Among them, P r1 is the receiving power of receiving antenna No. 1, P r2 is the received power of receiving antenna No. 2, and the objective function can be constructed based on the formula of the received power, that is, The purpose of taking min(|α-β|) is to reduce the imbalance between the two channels, which helps to improve the stability and reliability of the overall system, that is, to minimize the imbalance. Both max(α+β) and max(α,β) are to maximize the received power of the signal. The objective function can be set to maximize α+β, or to maximize both α and β, that is, to maximize the received power.

[0047] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0048] Through the description of the above implementation methods, those skilled in the art can clearly understand that the antenna angle determination method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0049] According to an embodiment of the present invention, there is also provided an antenna angle determination device for implementing the above antenna angle determination method. Figure 3 is a structural block diagram of an antenna angle determination device provided according to an embodiment of the present invention, such as Figure 3 As shown, the antenna angle determination device includes: an acquisition module 32, a first determination module 34, a construction module 36 and a second determination module 38. The antenna angle determination device is described below.

[0050] The acquisition module 32 is used to acquire the matrix parameters of the spatial channel matrix between the access point antenna and the site.

[0051] The first determination module 34 is used to determine the space mapping matrix based on the restriction function and the space channel matrix, wherein the restriction function is used to limit the maximum value of the elements in the space mapping matrix, and the maximum value is set based on the maximum output power of the radio frequency amplifier in the access point.

[0052] The construction module 36 is used to construct an objective function for characterizing the received power of the site based on the spatial channel matrix and the spatial mapping matrix, wherein the objective function is a function with the antenna gain of the access point as an independent variable.

[0053] The second determination module 38 is configured to determine a target antenna angle according to an angle corresponding to an antenna gain having a maximum value of an objective function among multiple antenna gains of the access point.

[0054] Optionally, the first determination module 34 is used to determine the spatial mapping matrix based on the restriction function and the spatial channel matrix, including: determining the inverse matrix of the spatial channel matrix as the first initial spatial mapping matrix; or determining the quasi-inverse matrix of the spatial channel matrix as the first initial spatial mapping matrix; and adjusting the first initial spatial mapping matrix according to the restriction function to obtain the spatial mapping matrix.

[0055] Optionally, when the inverse matrix of the spatial channel matrix is ​​the first initial spatial mapping matrix, the objective function is a function set with the trace maximum of the product of the spatial channel matrix and the spatial mapping matrix as the objective.

[0056] Optionally, when the quasi-inverse matrix of the spatial channel matrix is ​​the first initial spatial mapping matrix, the objective function includes a first sub-function and a second sub-function, wherein the first sub-function represents the sum of the received powers corresponding to each of the multiple sub-channels in the site, and the second sub-function represents the difference in the received powers corresponding to any two of the multiple sub-channels in the site.

[0057] Optionally, the acquisition module 32 is used to obtain matrix parameters of the spatial channel matrix between the access point antenna and the site, including: a control unit is used to control the antenna of the access point to send a detection signal to the site at an initial antenna angle; a receiving unit is used to receive an initial channel matrix generated by the site based on the detection signal, wherein the initial channel matrix is ​​used to characterize the channel loss between the access point and the site at the initial antenna angle; and a determination unit is used to determine the matrix parameters of the spatial channel matrix between the access point and the site based on the initial channel matrix and the antenna gain corresponding to the initial antenna angle.

[0058] Optionally, the control unit is used to control the antenna of the access point to send a detection signal to the site at an initial antenna angle, including: determining the second initial spatial mapping matrix as a unit matrix; based on the second initial spatial mapping matrix, controlling the antenna of the access point to send a detection signal to the site at an initial antenna angle.

[0059] It should be noted here that the above-mentioned acquisition module 32, first determination module 34, construction module 36 and second determination module 38 correspond to steps S102 to S108 in the embodiment, and the instances and application scenarios implemented by multiple modules and corresponding steps are the same, but are not limited to the contents disclosed in the above-mentioned embodiments.

[0060] An embodiment of the present invention may provide a computer device. Optionally, in this embodiment, the computer device may be located in at least one network device among multiple network devices of a computer network. The computer device includes a memory and a processor.

[0061] Among them, the memory can be used to store software programs and modules, such as the program instructions / modules corresponding to the antenna angle determination method and device in the embodiments of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, that is, the above-mentioned antenna angle determination method is realized. The memory may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include a memory remotely arranged relative to the processor, and these remote memories can be connected to the computer terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0062] The processor can call the information and application stored in the memory through the transmission device to perform the following steps: obtain the matrix parameters of the spatial channel matrix between the access point antenna and the site; based on the spatial channel matrix with determined matrix parameters and the target space mapping matrix, construct an objective function for characterizing the site receiving power, wherein the objective function is a function with the antenna gain of the access point as an independent variable; from the multiple antenna gains of the access point, select the angle corresponding to the antenna gain with the largest value of the objective function as the target antenna angle.

[0063] An embodiment of the present invention provides a method for determining an antenna angle, by obtaining matrix parameters of a spatial channel matrix between an access point antenna and a site; determining a spatial mapping matrix based on a restriction function and a spatial channel matrix, wherein the restriction function is used to limit the maximum value of elements in the spatial mapping matrix, and the maximum value is set based on the maximum output power of a radio frequency amplifier in the access point; constructing an objective function for characterizing the received power of the site based on the spatial channel matrix and the spatial mapping matrix, wherein the objective function is a function with the antenna gain of the access point as an independent variable; determining a target antenna angle according to an angle corresponding to an antenna gain with the largest value of the objective function among multiple antenna gains of the access point, thereby achieving the purpose of quickly determining the target antenna angle, thereby realizing the technical effect of improving the antenna adjustment efficiency, and further solving the technical problem of using a traversal method to adjust the antenna angle in the related art, which results in a long time consumption and low efficiency.

[0064] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the hardware related to the terminal device through a program, and the program can be stored in a non-volatile storage medium, and the storage medium may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0065] The embodiment of the present invention further provides a non-volatile storage medium. Optionally, in this embodiment, the non-volatile storage medium can be used to store the program code executed by the antenna angle determination method provided in the above embodiment.

[0066] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group.

[0067] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: obtaining matrix parameters of the spatial channel matrix between the access point antenna and the site; determining the spatial mapping matrix based on the restriction function and the spatial channel matrix, wherein the restriction function is used to limit the maximum value of the elements in the spatial mapping matrix, and the maximum value is set based on the maximum output power of the radio frequency amplifier in the access point; constructing an objective function for characterizing the received power of the site based on the spatial channel matrix and the spatial mapping matrix, wherein the objective function is a function with the antenna gain of the access point as an independent variable; determining the target antenna angle according to the angle corresponding to the antenna gain with the largest value of the objective function among multiple antenna gains of the access point.

[0068] An embodiment of the present invention also provides a computer program product, including a computer program. Optionally, in this embodiment, when the computer program is executed by a processor, it can achieve: obtaining matrix parameters of the spatial channel matrix between the access point antenna and the site; determining the spatial mapping matrix based on the restriction function and the spatial channel matrix, wherein the restriction function is used to limit the maximum value of the elements in the spatial mapping matrix, and the maximum value is set based on the maximum output power of the radio frequency amplifier in the access point; constructing an objective function for characterizing the received power of the site based on the spatial channel matrix and the spatial mapping matrix, wherein the objective function is a function with the antenna gain of the access point as an independent variable; determining the target antenna angle according to the angle corresponding to the antenna gain with the largest value of the objective function among multiple antenna gains of the access point.

[0069] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0070] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0071] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0072] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0073] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0074] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0075] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining an antenna angle, characterized in that: include: Obtain the spatial channel matrix between the access point antenna and the station; Determine a spatial mapping matrix based on a restriction function and the spatial channel matrix, wherein the restriction function is used to restrict a maximum value of elements in the spatial mapping matrix, and the maximum value is set based on a maximum output power of a radio frequency amplifier in the access point; Based on the spatial channel matrix and the spatial mapping matrix, construct an objective function for characterizing the received power of the station, wherein the objective function is a function with the antenna gain of the access point as an independent variable; A target antenna angle is determined according to an angle corresponding to an antenna gain that maximizes the value of the objective function among the multiple antenna gains of the access point.

2. The method according to claim 1, characterized in that The determining of the spatial mapping matrix based on the restriction function and the spatial channel matrix comprises: Determine an inverse matrix of the spatial channel matrix as a first initial spatial mapping matrix; Or, determining a quasi-inverse matrix of the spatial channel matrix as a first initial spatial mapping matrix; The first initial space mapping matrix is ​​adjusted according to the restriction function to obtain the space mapping matrix.

3. The method according to claim 2, characterized in that In a case where the inverse matrix of the spatial channel matrix is ​​the first initial spatial mapping matrix, the objective function is a function set with the maximum trace of the product of the spatial channel matrix and the spatial mapping matrix as a goal.

4. The method according to claim 2, characterized in that: In the case where the quasi-inverse matrix of the spatial channel matrix is ​​the first initial spatial mapping matrix, the objective function includes a first sub-function and a second sub-function, wherein the first sub-function represents the sum of the received powers corresponding to each of the multiple sub-channels in the site, and the second sub-function represents the difference in the received powers corresponding to any two sub-channels in the multiple sub-channels in the site.

5. The method according to any one of claims 1 to 4, characterized in that: The obtaining of matrix parameters of a spatial channel matrix between an access point antenna and a site includes: Controlling the antenna of the access point to send a detection signal to the site at an initial antenna angle; receiving an initial channel matrix generated by the station based on the detection signal, wherein the initial channel matrix is ​​used to characterize the channel loss between the access point and the station at the initial antenna angle; A matrix parameter of a spatial channel matrix between the access point and the site is determined according to the initial channel matrix and the antenna gain corresponding to the initial antenna angle.

6. The method according to any one of claim 5, characterized in that: The controlling the antenna of the access point to send a detection signal to the station at an initial antenna angle includes: Determine the second initial space mapping matrix as the identity matrix; Based on the second initial spatial mapping matrix, the antenna of the access point is controlled to send the detection signal to the station at the initial antenna angle.

7. An antenna angle determination device, characterized in that: include: An acquisition module, used to acquire matrix parameters of a spatial channel matrix between an access point antenna and a station; A first determination module is configured to determine a spatial mapping matrix based on a restriction function and the spatial channel matrix, wherein the restriction function is configured to limit a maximum value of elements in the spatial mapping matrix, and the maximum value is set based on a maximum output power setting of a radio frequency amplifier in an access point; A construction module, configured to construct an objective function for characterizing the received power of the station based on the spatial channel matrix and the spatial mapping matrix, wherein the objective function is a function with the antenna gain of the access point as an independent variable; The second determination module is used to determine the target antenna angle according to the angle corresponding to the antenna gain with the maximum value of the objective function among the multiple antenna gains of the access point.

8. A non-volatile storage medium, characterized in that: The non-volatile storage medium includes a stored program, wherein when the program is executed, the device where the non-volatile storage medium is located is controlled to execute the antenna angle determination method according to any one of claims 1 to 6.

9. A computer device, characterized in that: include: Memory and processor, The memory stores a computer program; The processor is used to execute the computer program stored in the memory, and when the computer program is run, the processor executes the antenna angle determination method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the antenna angle determination method according to any one of claims 1 to 6 is implemented.

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