WO2023083017A1

WO2023083017A1 - Signal angle-of-arrival estimation method and related device

Info

Publication number: WO2023083017A1
Application number: PCT/CN2022/128077
Authority: WO
Inventors: 张志华; 龙星宇; 李建铭; 黄建仁
Original assignee: 华为技术有限公司
Priority date: 2021-11-12
Filing date: 2022-10-27
Publication date: 2023-05-19
Also published as: CN116125374A

Abstract

A signal angle-of-arrival estimation method, which is applied to an electronic device, wherein the electronic device comprises an antenna unit, the antenna unit comprises a first antenna and a second antenna, and the antenna unit has at least two antenna field type states. The method comprises: an electronic device controlling an antenna unit to switch between at least two antenna field type states; in each antenna field type state, the electronic device receiving, by means of a first antenna and a second antenna, radio signals having the same angle of arrival, and calculating a phase difference between the first antenna and the second antenna, so as to obtain at least two corresponding phase differences in the at least two antenna field type states; and the electronic device determining the angle of arrival of the radio signals according to the at least two phase differences. By means of the method, an electronic device can more accurately estimate the angle of arrival of a radio signal. Further provided are a computer-readable storage medium and a computer program product.

Description

Signal Arrival Angle Estimation Method and Related Equipment

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202111369078.7 and the application title "Signal Angle of Arrival Estimation Method and Related Equipment" submitted to the China Patent Office on November 12, 2021, the entire contents of which are incorporated by reference in this application middle.

technical field

The present application relates to the field of electronic technology, and in particular to a method for estimating the angle of arrival of a signal and related equipment.

Background technique

Positioning algorithms based on signal angle of arrival (AOA) are often used in electronic device positioning technology. The electronic device obtains the angle of arrival of the signal between the electronic device to be positioned and the straight line where the multiple antennas are located according to the phase difference of the signals collected by the multiple antennas. The position of the electronic device to be positioned is determined according to the angle of arrival of signals between the electronic device to be positioned and different straight lines.

Since the hardware performance of the electronic device is not in an ideal state, it often occurs that the phase difference between the antennas measured by the electronic device when receiving the same wireless signal corresponds to multiple arrival angles; when determining the arrival angle of the direction of arrival based on the calculated phase difference, The true angle of arrival cannot be determined, leading to serious errors in the estimation of the signal angle of arrival. In this way, the accuracy of the angle of arrival of the signal estimated by the electronic device through the phase difference between the antennas is not high.

Contents of the invention

The present application provides a method for estimating a signal angle of arrival and related equipment, through which an electronic device can more accurately estimate the angle of arrival of a radio signal received by the electronic device.

In a first aspect, the present application provides a method for estimating the angle of arrival of a signal, the method is applied to an electronic device, the electronic device includes an antenna unit, the antenna unit includes a first antenna and a second antenna, and the antenna unit has multiple An antenna pattern state, the method includes:

The electronic device controls the antenna unit to switch among the plurality of antenna pattern states; in each antenna pattern state, the electronic device receives the same arrival signal through the first antenna and the second antenna and calculating the phase difference between the first antenna and the second antenna, so as to obtain at least two phase differences corresponding to at least two antenna pattern states;

The electronic device determines the angle of arrival of the radio signal according to the at least two phase differences.

Since the phase difference between antennas in the same antenna pattern state may correspond to multiple angles of arrival, the method provided in this application can switch between multiple pattern states to obtain at least two phases corresponding to at least two antenna pattern states difference, and based on the at least two phase differences and the corresponding antenna pattern states, the actual angle of arrival of the wireless signal can be uniquely determined, and the angle of arrival of the wireless signal can be determined by the phase difference of at least two antenna pattern states to improve the angle of arrival accuracy.

Among the multiple antenna pattern states in the present application, there may be two or more than two.

In a possible implementation manner, the electronic device controls the antenna unit to switch among the multiple antenna pattern states; in each antenna pattern state, the electronic device uses the first antenna and the The second antenna receives radio signals with the same angle of arrival and calculates the phase difference between the first antenna and the second antenna, so as to obtain at least two phase differences corresponding to at least two antenna pattern states including:

In a first antenna pattern state of the plurality of antenna pattern states, the electronic device receives radio signals through the first antenna and the second antenna;

calculating, by the electronic device, a first phase difference between the first antenna and the second antenna in the pattern state of the first antenna;

The electronic device determines a first set of arrival angles according to the first phase difference, the first antenna pattern state, and a preset mapping relationship table, wherein the mapping relationship table includes multiple antenna pattern states different angles of arrival, and phase differences between the first antenna and the second antenna corresponding to the different angles of arrival of the radio signal;

If the first set of angles of arrival includes at least two angles of arrival, the electronic device switches the antenna unit from the first antenna pattern state to the second antenna pattern state among the plurality of antenna pattern states state, and receiving said radio signal by said first antenna and said second antenna in said second antenna pattern state;

The electronic device calculates a second phase difference between the first antenna and the second antenna in the second antenna pattern state.

After obtaining the phase difference in each antenna pattern state, first determine the number of arrival angles corresponding to the phase angle according to the preset mapping relationship table and the phase difference. If the number of arrival angles corresponding to the phase difference is greater than 1, switch The antenna pattern state and obtain the phase difference corresponding to the corresponding antenna pattern state; if the phase difference corresponds to only one angle of arrival, then the angle of arrival is the actual angle of arrival.

In a possible implementation manner, the electronic device determining the angle of arrival of the radio signal according to the at least two phase differences includes: the electronic device determining the angle of arrival of the radio signal according to the second phase difference and the second antenna pattern The state and the mapping relationship table determine a second set of arrival angles;

The electronic device determines an angle of arrival of the radio signal based on the first set of angles of arrival and the second set of angles of arrival.

In this way, the corresponding arrival angle set is determined according to the phase difference, the antenna pattern state corresponding to the phase difference, and the mapping relationship table, wherein the arrival angle set includes at least one arrival angle, and the two arrival angles corresponding to the two antenna pattern states The set determines the actual angle of arrival of the wireless signal.

In a possible implementation manner, determining, by the electronic device, the angle of arrival of the radio signal according to the first set of angles of arrival and the second set of angles of arrival includes:

determining an intersection of the first set of angles of arrival and the second set of angles of arrival;

If the intersection includes an angle of arrival, then determine the angle of arrival as the angle of arrival of the radio signal.

The actual angle of arrival is determined by obtaining the intersection of the two angles of arrival.

In a possible implementation, if the intersection includes at least two angles of arrival, the method further includes:

The electronic device switches the antenna unit from the second antenna pattern state to a third antenna pattern state among the plurality of antenna pattern states, and through the first antenna and the second antenna receiving said radio signal in said third antenna pattern state;

calculating, by the electronic device, a third phase difference between the first antenna and the second antenna in the pattern state of the three antennas;

The electronic device determines a third angle-of-arrival set according to the third phase difference, the third antenna pattern state, and the mapping relationship table;

The angle of arrival of the radio signal is determined from the intersection and the third set of angles of arrival.

If the angle of arrival determined by the two pattern states is greater than two, control the antenna unit to switch the antenna pattern state and obtain the corresponding arrival angle set under the antenna pattern state, and determine the actual angle of arrival according to the intersection of all obtained angles of arrival. angle of arrival.

Of course, when the number of angles of arrival determined by the angle-of-arrival sets corresponding to the three antenna pattern states is greater than two, you can switch the antenna pattern state again, and obtain the corresponding angle-of-arrival set under the antenna pattern state, and The actual arrival angle is determined according to the intersection of all obtained arrival angles, and the above steps are repeated until the number of obtained arrival angles is one.

The electronic device controls the antenna unit to sequentially switch between different antenna pattern states in at least two antenna pattern states; during the switching process, the electronic device passes through the first antenna pattern state in each antenna pattern state An antenna and the second antenna receive radio signals with the same angle of arrival and calculate the phase difference between the first antenna and the second antenna in each antenna pattern state, so as to obtain all antenna fields of the antenna unit A type state corresponds to at least two phase differences of the first antenna and the second antenna.

By sequentially switching the antenna pattern states until at least two phase differences corresponding to the first antenna and the second antenna are obtained for all antenna pattern states.

In a possible implementation manner, the electronic device determining the angle of arrival of the radio signal according to the at least two phase differences includes: according to each antenna pattern state of the first antenna and the second antenna The phase difference and the preset mapping relationship table determine the corresponding arrival angle set, so as to obtain at least two arrival angle sets corresponding to the at least two antenna pattern states, and the mapping relationship table includes a plurality of antenna pattern states different angles of arrival in the state, and the phase difference between the first antenna and the second antenna corresponding to the different angles of arrival of the radio signal;

The angle of arrival of the radio signal is determined based on at least two of the sets of angles of arrival.

In this way, the set of angles of arrival corresponding to the phase difference can be determined through the mapping relationship table and the obtained phase difference, and the actual angle of arrival of the wireless signal can be determined according to the multiple sets of angles of arrival.

The electronic device inputs the identification of the first antenna pattern state and the first phase difference into a preset angle-of-arrival calculation function, and if the angle-of-arrival calculation function outputs at least two angles of arrival, the electronic device will The antenna unit is switched from the first antenna pattern state to the second antenna pattern state among the plurality of antenna pattern states, and the second antenna pattern state is switched between the first antenna and the second antenna receiving the radio signal in an antenna pattern state;

In this way, the corresponding arrival angle set is determined according to the phase difference, the antenna pattern state corresponding to the phase difference, and the preset angle-of-arrival calculation function, wherein the arrival angle set includes at least one angle-of-arrival, through the two corresponding antenna pattern states The two angle-of-arrival sets determine the actual angle-of-arrival of the radio signal.

In a possible implementation manner, determining, by the electronic device, the angle of arrival of the radio signal according to the at least two phase differences includes:

The at least two phase differences and the corresponding antenna pattern states are input into a preset angle-of-arrival calculation function to obtain the angle-of-arrival of the radio signal.

The angle of arrival of the radio signal is obtained by using at least two phase differences, corresponding antenna pattern states, and a preset angle of arrival calculation function.

In a possible implementation manner, the first antenna has at least two first feed points, and the electronic device controlling the antenna unit to switch between the at least two antenna pattern states includes:

The electronic device controls switching of different feed points among at least two first feed points between the first antenna and the corresponding feed source, so as to realize switching of the antenna unit among the at least two antenna pattern states.

In this way, the antenna pattern can be switched between the antenna pattern states by changing the feed point of the antenna.

In a possible implementation manner, the first antenna has at least two first ground points, and the electronic device controlling the antenna unit to switch between the at least two antenna pattern states includes:

The electronic device controls switching of different grounding points among at least two first grounding points between the first antenna and the corresponding feed source, so as to realize switching of the antenna unit among the at least two antenna pattern states.

In this way, the switching of the antenna pattern state is realized by changing the ground point of the antenna. That is, only changing the feed point of one of the multiple antennas can realize the switching of the antenna pattern state.

In a possible implementation manner, the first antenna has at least two first feed points, the second antenna includes at least two second feed points, and the electronic device controls the antenna unit to Switching between the two antenna pattern states includes:

The electronic device controls switching of different feed points among at least two first feed points between the first antenna and the corresponding feed source and at least two second feed points between the second antenna and the corresponding feed source Switching between different feed points in the antenna unit, so as to realize the switching of the antenna unit among the at least two antenna pattern states.

In this way, the switching of the antenna pattern state is realized by changing the feeding points of all the antennas.

In a possible implementation manner, two feed points of the at least two first feed points are respectively located on opposite sides of the first antenna or two feed points of the at least two first feed points The points are respectively located on adjacent two sides of the first antenna.

In this way, the angle between the feed point on both sides of the antenna and the line connecting the antenna center, the angle between the feed point on the adjacent two sides and the antenna center, and the angle change angle correspond to the antenna pattern state. The phase change is also more obvious, and it is convenient to determine the change of the phase difference according to the phase change, so that the angle of arrival can be determined more accurately.

Preferably, the included angle between the feed points on both sides of the antenna and the antenna center may be 180 degrees, and the included angle between the feed points on adjacent two sides and the antenna center may be 90 degrees.

In a possible implementation manner, two feed points of the at least two first feed points are respectively located on opposite sides of the first antenna, and two feed points of the at least two second feed points The points are respectively located on opposite sides of the second antenna, or the two feed points of the at least two first feed points are respectively located on adjacent sides of the first antenna, and the at least two second feed points The two feed points in the points are respectively located on adjacent two sides of the second antenna.

In a possible implementation manner, the antenna unit further includes a third antenna, and the mapping relationship table further includes different angles of arrival under multiple antenna pattern states, and all angles of arrival corresponding to different angles of arrival of the radio signal. phase difference between the first antenna and the third antenna.

Wherein, the number of antennas of the antenna unit may be 3, 4 or 5, and the application does not limit the number of antennas.

In a possible implementation manner, receiving radio signals by the electronic device through the first antenna and the second antenna includes:

The electronic device receives radio signals through the first antenna, the second antenna, and the third antenna; the electronic device calculates that the first antenna and the second antenna are in the field of the first antenna The first phase difference in the type state, including:

calculating, by the electronic device, a third phase difference between the first antenna and the third antenna in the pattern state of the first antenna;

The electronic device determines a first angle-of-arrival set according to the first phase difference, the first antenna pattern state, and the mapping relationship table, including:

The electronic device determines a first angle-of-arrival subset according to the first phase difference, the first antenna pattern state, and the mapping relationship table;

The electronic device determines a second angle-of-arrival subset according to the third phase difference, the first antenna pattern state, and the mapping relationship table;

A first set of angles of arrival is determined according to the first subset of angles of arrival and the second subset of angles of arrival.

In a possible implementation manner, the first antenna has at least two first feed points, the second antenna has at least two second feed points, and the third antenna has at least two third feed points , the electronic device controls the antenna unit to switch between the at least two antenna pattern states, including:

The electronic device controls the switching of different feed points among at least two first feed points between the first antenna and the corresponding feed source, and the switching between the at least two second feed points between the second antenna and the corresponding feed source. The switching of the feed point, the switching of different feed points among at least two third feed points between the third antenna and the corresponding feed source, so as to realize the switching of the antenna unit among the at least two antenna pattern states.

In a second aspect, an electronic device is provided, which may include two or more than two antennas, a display screen, one or more processors, and one or more memories; one or more processors and two or more Two antennas, one or more memories and a display screen are coupled, one or more memories are used to store computer program codes, the computer program codes include computer instructions, and when one or more processors execute the computer instructions, the electronic device performs the above-mentioned A method for estimating the angle of arrival of a signal in any possible manner of the first aspect.

In the third aspect, the embodiment of the present application provides a computer storage medium, including computer instructions, when the computer instructions are run on the electronic device, the electronic device is made to perform the signal arrival angle in any possible implementation of any one of the above aspects Estimation method.

In a fourth aspect, an embodiment of the present application provides a computer program product, which, when the computer program product is run on an electronic device, causes the electronic device to execute the method for estimating the angle of arrival of a signal in any possible implementation manner of any one of the above aspects.

Description of drawings

FIG. 1 is a schematic diagram of a model for estimating the angle of arrival of a signal using a phase difference provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of antenna placement in an electronic device provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of an electronic device receiving a signal provided in an embodiment of the present application;

FIG. 4 is a schematic flowchart of a method for establishing a mapping relationship table by a mobile phone provided in an embodiment of the present application;

FIG. 5A is a schematic diagram of the antenna unit of the electronic device provided in the embodiment of the present application in the first antenna pattern state;

5B is a schematic diagram of the antenna unit of the electronic device provided in the embodiment of the present application in the second antenna pattern state;

FIG. 6A is a schematic diagram of the phase comparison of the horizontal section of the first antenna in the first antenna pattern state and the second antenna pattern state provided by the embodiment of the present application;

FIG. 6B is a schematic diagram of phase comparison of the horizontal section of the second antenna in the first antenna pattern state and the second antenna pattern state provided by the embodiment of the present application;

FIG. 6C is a schematic diagram of phase comparison of the horizontal section of the third antenna in the first antenna pattern state and the second antenna pattern state provided by the embodiment of the present application;

FIG. 7A is a schematic diagram of the phase difference between the first antenna and the second antenna in the first antenna pattern state provided by the embodiment of the present application;

7B is a schematic diagram of the phase difference between the first antenna and the second antenna in the second antenna pattern state provided by the embodiment of the present application;

FIG. 7C is a schematic diagram of the phase difference comparison between the first antenna and the second antenna under the first antenna pattern state and the second antenna pattern state provided by the embodiment of the present application;

FIG. 8A is a schematic diagram of the phase difference between the first antenna and the third antenna in the first antenna pattern state provided by the embodiment of the present application;

FIG. 8B is a schematic diagram of the phase difference between the first antenna and the third antenna in the second antenna pattern state provided by the embodiment of the present application;

FIG. 8C is a schematic diagram of the phase difference comparison between the first antenna and the third antenna under the first antenna pattern state and the second antenna pattern state provided by the embodiment of the present application;

FIG. 9 is a schematic diagram of changing the feeding point of the antenna unit of the electronic device provided by the embodiment of the present application;

FIG. 10A is a schematic diagram of the antenna unit of the electronic device in the third antenna pattern state provided by the embodiment of the present application;

FIG. 10B is a schematic diagram of the antenna unit of the electronic device in the fourth antenna pattern state provided by the embodiment of the present application;

Fig. 11A is a schematic diagram of phase comparison of the horizontal section of the first antenna in the third antenna pattern state and the fourth antenna pattern state provided by the embodiment of the present application;

Fig. 11B is a schematic diagram of phase comparison of the horizontal section of the second antenna in the third antenna pattern state and the fourth antenna pattern state provided by the embodiment of the present application;

FIG. 11C is a schematic diagram of phase comparison of the horizontal section of the third antenna in the third antenna pattern state and the fourth antenna pattern state provided by the embodiment of the present application;

FIG. 11D is a schematic diagram of phase comparison of the horizontal section of the fourth antenna in the third antenna pattern state and the fourth antenna pattern state according to the embodiment of the present application;

12A is a schematic diagram of the phase difference between the first antenna and the second antenna in the third antenna pattern state provided by the embodiment of the present application;

12B is a schematic diagram of the phase difference between the first antenna and the second antenna in the fourth antenna pattern state provided by the embodiment of the present application;

FIG. 12C is a schematic diagram of the phase difference comparison between the first antenna and the second antenna in the third antenna pattern state and the fourth antenna pattern state provided by the embodiment of the present application;

FIG. 13A is a schematic diagram of the phase difference between the first antenna and the third antenna in the third antenna pattern state provided by the embodiment of the present application;

13B is a schematic diagram of the phase difference between the first antenna and the third antenna in the fourth antenna pattern state provided by the embodiment of the present application;

FIG. 13C is a schematic diagram of the phase difference comparison between the first antenna and the third antenna in the third antenna pattern state and the fourth antenna pattern state provided by the embodiment of the present application;

FIG. 14A is a schematic diagram of the phase difference between the first antenna and the fourth antenna in the third antenna pattern state provided by the embodiment of the present application;

FIG. 14B is a schematic diagram of the phase difference between the first antenna and the fourth antenna in the fourth antenna pattern state provided by the embodiment of the present application;

Fig. 14C is a schematic diagram of the phase difference comparison between the first antenna and the fourth antenna in the third antenna pattern state and the fourth antenna pattern state provided by the embodiment of the present application;

FIG. 15 is a schematic flowchart of a signal angle of arrival estimation method provided by an embodiment of the present application;

FIG. 16 is a schematic flowchart of a signal angle of arrival estimation method provided by another embodiment of the present application;

FIG. 17 is a schematic flowchart of a signal angle of arrival estimation method provided by an embodiment of the present application;

FIG. 18A is a schematic diagram of the distribution of confusion angles under the single-antenna pattern state provided by the embodiment of the present application;

FIG. 18B is a schematic diagram of the distribution of confusion angles under the dual-antenna pattern state provided by the embodiment of the present application;

FIG. 19 is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

FIG. 20 is a schematic diagram of a software framework of an electronic device provided by an embodiment of the present application.

Detailed ways

The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also Plural expressions are included unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used in this application refers to and includes any and all possible combinations of one or more of the listed items.

Hereinafter, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as implying or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present application, unless otherwise specified, the "multiple" The meaning is two or more.

Since the embodiment of the present application relates to the application of a method for estimating the angle of arrival of a signal, for ease of understanding, the relevant terms and concepts involved in the embodiment of the present application are firstly introduced below.

1. Arrival angle

In this embodiment of the present application, the angle of arrival may refer to the angle formed between the signal transmitted by the signal transmitting device and the antenna in the electronic device, which is called the angle of arrival, and may also be called the angle of incidence. As shown in Figure 1, the angle θ formed by the radio signal and antenna 1 and antenna 2 is the arrival angle of the radio signal. Here, the signal transmitting device may be a router, a base station, etc., which is not limited in this application. The radio signal may be a cellular mobile signal, a Bluetooth signal, a Wi-Fi (wireless fidelity, wireless fidelity) signal, a UWB (Ultra-wideband, ultra-wideband) signal, etc., which are not limited here.

In the embodiment of the present application, the angle of arrival of the signal may also be referred to as the direction of arrival of the signal.

2. Radiation pattern

In the embodiment of the present application, the antenna pattern refers to the variation of the relative field strength (normalized modulus) of the radiation field with the direction at a certain distance from the antenna. The antenna pattern is usually described by the antenna radiation pattern. The antenna radiation pattern is also called the antenna pattern and the far field pattern. The antenna radiation pattern is used to characterize the antenna radiation characteristics (field strength amplitude, phase, polarization) and space angle Graphics of relationships. Different antenna patterns correspond to different antenna pattern states, and the relative field strengths of the radiation fields of antennas in different antenna pattern states vary with directions.

In the embodiment of the present application, the electronic device may have a positioning function. When a user uses a positioning function in an electronic device (for example, clicks on a map application), the electronic device can obtain a positioning result through an AOA positioning algorithm. The more accurate the angle of arrival of the signal estimated by the electronic device is, the more accurate the positioning result calculated by the electronic device using the angle of arrival is. The electronic device may be a smart device with two or more antennas, such as a mobile phone, a tablet computer, and a personal computer, and the specific type of the electronic device is not particularly limited in the embodiments of the present application.

It can be understood that the electronic device may also have an object finding function or a function of determining the direction of other devices. The electronic device may determine the direction of the object it is looking for through the AOA estimation, or determine the direction of other electronic devices through the AOA estimation, which is not limited herein.

In a possible implementation manner, the electronic device may store a mapping relationship table between phase differences between antennas and signal arrival angles. When the electronic device estimates the angle of arrival of the signal, the electronic device can determine the phase difference between the antennas when the signal is received. Then, the electronic device matches the phase difference with the phase difference in the mapping relationship table, and the angle of arrival corresponding to the phase difference matched with the phase difference in the mapping relationship table is the estimated result of the angle of arrival.

Here, the electronic device may store a mapping relationship table between the phase difference between antennas and the signal arrival angle of a specific antenna pattern state.

For example, as shown in FIG. 2, there are three antennas in the electronic device 100 in FIG. 2: antenna 1, antenna 2, and antenna 3. The electronic device can establish the phase difference PD1 between antenna 1 and antenna 2 and the phase difference between antenna 1 and antenna 3. The mapping relationship between the phase difference PD2 and the arrival angle of the signal.

Table 1

到达角度angle of arrival	0°0°	1°1°	2°2°	……	359°359°
天线1与天线2的相位差(PD1)Phase difference between antenna 1 and antenna 2 (PD1)	A(0°)A(0°)	A(1°)A(1°)	A(2°)A(2°)	……	A(359°)A(359°)
天线1与天线3的相位差(PD2)Phase difference between antenna 1 and antenna 3 (PD2)	B(0°)B(0°)	B(1°)B(1°)	B(2°)B(2°)	……	B(359°)B(359°)

Table 1 is a mapping relationship table between the phase difference between antennas in the electronic device and the angle of arrival of the received signal. Table 1 shows the phase difference PD1 between the antenna 1 and the antenna 2 and the phase difference PD2 between the antenna 1 and the antenna 3 when the angle of arrival of the signal is 0° to 359° respectively. As shown in Table 1, when the angle of arrival of the signal received by the electronic device is 0°, the phase difference PD1 of the signal received by the antenna 1 and the antenna 2 of the electronic device is A (0°), and the antenna 1 and the antenna 3 receive The phase difference PD2 to this signal is B(0°). When the arrival angle of the signal received by the electronic device is 1°, the phase difference PD1 of the signal received by the antenna 1 and the antenna 2 of the electronic device is A (1°), and the phase difference between the signal received by the antenna 1 and the antenna 3 PD2 is B(1°). When the angle of arrival of the signal received by the electronic device is 2°, the phase difference PD1 of the signal received by the antenna 1 and the antenna 2 of the electronic device is A (2°), and the phase difference between the signal received by the antenna 1 and the antenna 3 PD2 is B(2°). When the angle of arrival of the signal received by the electronic device is 359°, the phase difference PD1 of the signal received by the antenna 1 and the antenna 2 of the electronic device is A (359°), and the phase difference between the signal received by the antenna 1 and the antenna 3 PD2 is B (359°).

Table 2

Table 2 is a mapping relationship between the phase difference between the antennas and the angle of arrival of the received signal of the electronic device in one antenna pattern state. In Table 2, the actual arrival angle of the signal is 210°, and the phase difference corresponding to this arrival angle is 1.2°. However, the phase difference of 1.2° corresponds to three arrival angles: 210°, 150° and 60°. In this way, when the signal When the real angle of arrival is 210°, the electronic device may estimate the angle of arrival to be 150° or 60° according to the phase difference.

Therefore, the electronic device only determines the angle of arrival of the signal through the phase difference between the antennas and the image relationship between the phase difference and the angle of arrival. It may appear that the same phase difference value corresponds to multiple angles of arrival. In this way, the angle of arrival estimated by the electronic device may be inaccurate.

table 3

Table 3 is a mapping relationship between the phase difference between the antennas and the angle of arrival of the received signal of the electronic device in two antenna pattern states. Although each antenna pattern state has the same phase difference corresponding to multiple arrival angles, the first antenna pattern state has a phase difference of 1.2° corresponding to three arrival angles: 60°, 150° and 210°; the second The phase difference of 2.7° in the antenna pattern state corresponds to three arrival angles: 100°, 210° and 350°; if the calculated phase difference (PD1) between antenna 1 and antenna 2 is 1.2° in the first antenna pattern state , the phase difference (PD1) between antenna 1 and antenna 2 is calculated to be 2.7° under the second antenna pattern state, and the real The angle of arrival is 210°.

In order to improve the accuracy of the angle of arrival of the signal estimated by the electronic device, an embodiment of the present application provides a method for estimating the angle of arrival of the signal, which may include: the electronic device has an antenna unit, and the antenna unit includes at least two antennas, and the electronic device passes The antenna receives radio signals, and the electronic device stores a mapping relationship table between the phase difference between the antennas in the antenna unit and the signal arrival angle under the antenna field state set. The antenna field state set includes at least two antenna field states; the electronic device is in When receiving the radio signal, determine that the antenna unit is in the first antenna pattern state, determine the first phase difference of the antenna unit in the first antenna pattern state, and obtain the phase difference between the antennas in the first antenna pattern state and the signal arrival angle The first mapping relationship table, matching the first phase difference and the first mapping relationship table, determining a first signal arrival angle set corresponding to the first phase difference, the first signal arrival angle set includes at least two signal arrival angles; the antenna unit Switch from the first antenna pattern state to the second antenna pattern state, determine the second phase difference between the antennas of the antenna unit in the second antenna pattern state, and obtain the phase difference between the antennas and the second antenna pattern state. The second mapping relationship table of the signal arrival angle matches the second phase difference and the second mapping relationship table to determine the second arrival angle set corresponding to the second phase difference; since the first antenna pattern state and the second antenna pattern state The real angle of arrival of the received signal in the state remains unchanged, and the angle of arrival at which the first set of arrival angles and the second set of arrival angles overlap is the real angle of arrival.

Of course, if the number of angles of arrival in which the first set of arrival angles and the second set of arrival angles overlap each other is greater than one, the electronic device is also used to switch the antenna unit from the second antenna pattern state to the third antenna pattern state, and loop In the above steps, until the number of arrival angles that coincide with the multiple arrival angle sets is one.

In the embodiment of the present application, the mapping relationship between the phase difference and the angle of arrival stored in the electronic device may be one, that is, the phase difference corresponding to all the antenna pattern states under the antenna pattern state set and the angle of arrival are located in the same mapping relationship table; the mapping relationship table between the phase difference and the angle of arrival under the antenna pattern state stored in the electronic device can be multiple, that is, each antenna under the antenna pattern state set The phase difference and arrival angle corresponding to the field state are located in a mapping relationship table.

The antenna unit of the electronic device in the embodiment of the present application may have two antennas, or three antennas, or four antennas, or more antennas, which is not limited here. The embodiment of the present application will be described by taking an electronic device having three antennas as an example. As shown in FIG. 2 , FIG. 2 exemplarily shows a schematic diagram of an electronic device with 3 antennas. The electronic device 100 in FIG. 2 may have three antennas: antenna 1 , antenna 2 and antenna 3 . It can be understood that, the embodiment of the present application does not limit the placement position of the antenna in the electronic device, and the specific shape, type, and the like of the antenna.

When the angle of arrival of the wireless signal is fixed, the antenna unit of the electronic device is in different antenna pattern states, the relative field strength of the radiation field of the antenna unit varies with the direction, and the phase difference between the antennas corresponding to the angle of arrival is also different. That is, the phase difference between the antennas can be changed by switching the antenna pattern state of the antenna unit.

Therefore, the electronic device can use the phase difference of different antenna pattern states to estimate the angle of arrival of the signal. In this way, the accuracy of AOA estimation can be improved.

Before the electronic device estimates the angle of arrival of the signal, the electronic device may store a mapping relationship between the phase difference between the antennas of the antenna unit under the set of antenna pattern states and the angle of arrival of the signal. As shown in FIG. 3 , the signal transmitter 300 can transmit signals in different directions of the mobile phone 200 . The mobile phone 200 can record the phase difference between the antennas when receiving signals from different directions of arrival. For the specific process, refer to FIG. 4 , which exemplarily shows the specific process of the mobile phone 200 establishing a mapping relationship table between the phase difference between the antennas and the angle of arrival of the signal under the set of antenna pattern states.

As shown in FIG. 4 , the mobile phone 200 establishes the mapping relationship table between the phase difference between the antennas and the signal arrival angle under the antenna field state set of the antenna unit may include the following steps:

S401. The signal transmitter 300 is placed in different directions of the mobile phone 200 to continuously transmit radio signals.

S402. The mobile phone 200 receives the radio signal sent by the signal transmitter 300 through the antenna 1 , the antenna 2 , and the antenna 3 .

As shown in FIG. 3 , the signal transmitter 300 can be placed in different directions of the mobile phone 200 to continuously transmit radio signals. The mobile phone 200 can receive the radio signal sent by the signal transmitter 300 through the antenna 1 , the antenna 2 and the antenna 3 .

S403. When receiving radio signals from different directions, the mobile phone 200 calculates and stores the phase difference PD1 between antenna 1 and antenna 2, the phase difference PD2 between antenna 1 and antenna 3, and the corresponding arrival angle θ of the radio signal under the current antenna pattern state .

The mobile phone 200 first determines the current antenna pattern state. Under the current antenna pattern state, when the signal transmitter 300 is placed in the 0° direction of the mobile phone 200, the mobile phone 200 receives the radio signal transmitted by the signal transmitter 300. The mobile phone 200 can calculate the phase difference PD1 (0°) between the antenna 1 and the antenna 2 and the phase difference PD2 (0°) between the antenna 1 and the antenna 3 when receiving the radio signal in the 0° direction. When the signal transmitter is placed in a 1° direction of the mobile phone 200 , the mobile phone 200 receives the radio signal transmitted by the signal transmitter 300 . The mobile phone 200 can calculate the phase difference PD1 (1°) between the antenna 1 and the antenna 2 and the phase difference PD2 (1°) between the antenna 1 and the antenna 3 when receiving the radio signal in the 1° direction. In turn, the signal transmitter 300 transmits radio signals in different directions of the mobile phone 200 . Here, by adjusting the transmission angle of the radio signal transmitted by the signal transmitter 300 to adjust the arrival angle θ of the radio signal, the signal transmitter 300 adjusts 1° each time. It can be understood that in other embodiments, the signal transmitter 200 transmits the angle of The adjustment size can be 0.1°, 0.5°, etc., that is, the adjustment size of the emission angle can be determined according to the actual scene, and there is no special limitation here.

Here, the signal transmitter 300 may transmit radio signals on the same plane as the mobile phone 200 . When the signal transmitter 300 transmits radio signals in different directions of the mobile phone 200, the signal transmitter 300 and the mobile phone 200 are still in the same plane. At this time, the arrival angle of the radio signal may be an included angle between planes. It can be understood that the signal transmitter 300 and the mobile phone 200 may be on different planes. At this time, the angle of arrival of the radio signal may be a spatial angle, that is, the spatial angle may include an azimuth, a pitch, and a roll formed between the radio signal and the antenna in the mobile phone 200 .

S404. Determine whether the mobile phone 200 has received radio signals from all directions, and store the phase difference PD1 between antenna 1 and antenna 2 and the phase difference PD2 between antenna 1 and antenna 3 corresponding to all directions of incoming waves.

If the mobile phone 200 finishes receiving radio signals from all directions, and stores the phase differences PD1 and PD2 corresponding to all directions of incoming waves. Then the mobile phone 200 can execute step S405. Otherwise, the signal transmitter 300 executes step S401.

The embodiment of the present application is described by taking the signal transmitter 300 and the mobile phone 200 on the same plane as an example. The signal transmitter 300 can take the mobile phone 200 as the center, and continuously transmit radio signals at intervals of a preset angle α on a circle with a preset distance from the mobile phone 200 . The preset angle α may be 1°, 2°, or 5°, and the preset angle α is not limited here.

S405. The mobile phone 200 establishes and stores the current antenna pattern state, a mapping relationship table between the phase difference between the antennas and the angle of arrival of the radio signal.

After the mobile phone 200 stores the phase difference PD1 between antenna 1 and antenna 2 and the phase difference PD2 between antenna 1 and antenna 3 corresponding to all incoming wave directions, the mobile phone 200 can establish the antenna pattern state of the antenna unit, the phase difference between the antennas and the radio The mapping relationship table of the angle of arrival of the signal.

The mapping relationship table can record the phase difference PD1 between the antenna 1 and the antenna 2, and the phase difference between the antenna 1 and the antenna 3 when the signal transmitter 300 and the mobile phone 200 are on the same plane, and the arrival angle of the radio signal is separated by a preset angle α. PD2. The mapping relationship table can also record that the signal transmitter 300 and the mobile phone 200 are not on the same plane, and when the angle of arrival of the radio signal is separated by a preset angle β, the corresponding phase difference PD1 between antenna 1 and antenna 2, and the phase between antenna 1 and antenna 3 Poor PD2.

S406. Determine whether the mobile phone 200 has established and stored an image relationship table corresponding to all antenna pattern states in the antenna pattern state set.

If the mobile phone 200 stores the mapping relationship tables corresponding to all the antenna pattern states in the antenna pattern state set, the process ends. If the mobile phone 200 does not store mapping relationship tables corresponding to all antenna pattern states in the antenna pattern state set, step S407 is executed.

S407. Determine the antenna pattern state for which no corresponding mapping relationship table is stored in the mobile phone 200, and switch the mobile phone 200 to the antenna pattern state. Then the step jumps to S401.

Whether the mobile phone 200 matches all the antenna pattern states in the antenna pattern state set to establish a corresponding mapping relationship table, if the mapping relationship table corresponding to at least one antenna pattern state in the antenna pattern state set has not been established, or has been established If there is no at least one antenna pattern state in the antenna pattern state set in the mapping relationship table, it means that the phase difference and angle of arrival between the antennas in the at least one antenna pattern state have not been measured and calculated, and the mobile phone can be switched to One of the antenna pattern states, and repeatedly execute steps S401 to S405 to complete the measurement or calculation of the phase difference and the angle of arrival under all the antenna pattern states in the antenna pattern state set.

In this way, the above steps are cyclically executed until the mapping relationship tables corresponding to all the antenna pattern states in the antenna pattern state set are established and stored in the mobile phone.

Exemplarily, the antenna pattern state set includes a first antenna pattern state and a second antenna pattern state, and in the first antenna pattern state established by the mobile phone 200, the mapping relationship between the phase difference between the antennas and the arrival angle of the radio signal The table may be shown in Table 4 below.

Table 4

As shown in Table 4, this table 4 records the phase difference PD1 between antenna 1 and antenna 2 and the phase difference between antenna 1 and antenna 3 when the radio signal has a total of 360 angles from 0 ° to 359 ° under the first antenna pattern state. The phase difference PD2. In the first antenna pattern state, when the angle of arrival of the radio signal received by the mobile phone 200 is 0°, the phase difference PD1 between antenna 1 and antenna 2 is E (0°); the phase difference PD2 between antenna 1 and antenna 3 is F(0°). When the arrival angle of the radio signal received by the mobile phone 200 is 1°, the phase difference PD1 between antenna 1 and antenna 2 is E(1°); the phase difference PD2 between antenna 1 and antenna 3 is F(1°). When the arrival angle of the radio signal received by the mobile phone 200 is 2°, the phase difference PD1 between antenna 1 and antenna 2 is E(2°); the phase difference PD2 between antenna 1 and antenna 3 is F(2°). When the arrival angle of the radio signal received by the mobile phone 200 is 359°, the phase difference PD1 between antenna 1 and antenna 2 is E (359°); the phase difference PD2 between antenna 1 and antenna 3 is F (359°).

Exemplarily, the mapping relationship between the phase difference between the antennas and the arrival angle of the radio signal established by the mobile phone 200 in the second antenna pattern state may be shown in Table 5 below.

table 5

As shown in Table 5, this table 5 records the phase difference PD3 between antenna 1 and antenna 2 when the radio signal has a total of 360 angles from 0° to 359° under the second antenna pattern state, and the phase difference between antenna 1 and antenna 3 The phase difference PD4. When the angle of arrival of the radio signal received by the mobile phone 200 is 0°, the phase difference PD3 between antenna 1 and antenna 2 is G(0°); the phase difference PD2 between antenna 1 and antenna 3 is H(0°). When the arrival angle of the radio signal received by the mobile phone 200 is 1°, the phase difference PD1 between antenna 1 and antenna 2 is G (1°); the phase difference PD2 between antenna 1 and antenna 3 is H (1°). When the arrival angle of the radio signal received by the mobile phone 200 is 2°, the phase difference PD1 between antenna 1 and antenna 2 is G(2°); the phase difference PD2 between antenna 1 and antenna 3 is H(2°). When the angle of arrival of the radio signal received by the mobile phone 200 is 359°, the phase difference PD1 between antenna 1 and antenna 2 is G (359°); the phase difference PD2 between antenna 1 and antenna 3 is H (359°).

It can be understood that the mapping relationship tables stored in the mobile phone 200 may not be limited to the mapping relationship tables shown in Table 4 and the mapping relationship tables shown in Table 5. For example, when the angle of arrival and pitch angle of the radio signal are different, the mapping relationship table between the field state, the angle of arrival and the phase difference between the antennas of the mobile phone 200 may also be stored in the mobile phone 200 . This embodiment of the present application does not limit it.

Optionally, the mobile phone 200 may simultaneously store the mapping relationship table corresponding to the first antenna pattern state and the mapping relationship table corresponding to the second antenna pattern state in one table. For example, the above Table 4 and Table 5 can be stored in the same table. It is not limited here.

Optionally, the mobile phone 200 may store the mapping relationship table corresponding to the antenna pattern state in the antenna pattern state set established by the mobile phone 200 in the cloud server or server, which is not limited here.

It can be understood that the mobile phone 200 may have two antennas, namely antenna 1 and antenna 2 . The mobile phone 200 may store a mapping relationship table between the phase difference between the antenna 1 and the antenna 2 and the angle of arrival of the radio signal under all the antenna pattern states in the antenna pattern state set.

It can be understood that the mobile phone 200 may have four antennas including antenna 1 , antenna 2 , antenna 3 and antenna 4 . The mobile phone 200 can store the phase difference between antenna 1 and antenna 2, the phase difference between antenna 1 and antenna 3, and the phase difference between antenna 1 and antenna 4 under the antenna pattern state in the antenna pattern state set. , and the mapping relationship table between the angle of arrival of the radio signal. The image relationship table can store the different arrival angles of radio signals under all the antenna pattern states in the antenna pattern state set, the corresponding phase difference between antenna 1 and antenna 2, and the phase difference between antenna 1 and antenna 3. , and the phase difference between antenna 1 and antenna 4.

It can be understood that the mobile phone 200 may have more than N antennas, and N is greater than 4. The mobile phone 200 may store a mapping relationship table between the phase difference between any antenna of the N antennas and other antennas and the angle of arrival of the radio signal under all the antenna pattern states in the antenna pattern state set. The mapping relationship table may store different arrival angles of radio signals, and corresponding phase differences between any one of the N antennas and other antennas.

It can be understood that when the mobile phone 200 establishes the mapping relationship table between the phase difference between the antennas and the angle of arrival of the radio signal under the antenna pattern state set in the antenna pattern state set, the mobile phone 200 can be in a fixed position, and can be changed by changing The position of the signal transmitter 300 is used to change the angle at which the radio signal emitted by the signal transmitter 300 reaches the antenna in the mobile phone 200 . The signal transmitter 300 can also be in a fixed position, and the angle of arrival of the radio signal received by the antenna in the mobile phone 200 can be changed by changing the position of the mobile phone 200 . This embodiment of the present application does not limit it. The antenna pattern is used to represent the relative field strength of the radiation field of the antenna changing with the direction. It can be understood that the antenna unit of the electronic device is in different antenna pattern states, and the relative field strength of the radiation field corresponding to the antenna changes with the direction. The phase difference between the antennas of the antenna unit changes accordingly. The antenna pattern state of the antenna unit can be changed through the antenna modulation technology, which includes changing the feed point and ground point of the antenna unit, etc., so as to realize the switching of different antenna pattern states.

For example, please refer to FIG. 5A and FIG. 5B . FIG. 5A and FIG. 5B are schematic diagrams illustrating switching between two antenna pattern states of an antenna unit of an electronic device. The electronic device 600 shown in FIG. 5A and FIG. 5B has an antenna unit 610, and the antenna unit 610 has three antennas: a first antenna 612, a second antenna 614 and a third antenna 616, and the first antenna 612 has a first feed point 612A and The second feed point 612B, the first feed point 612A and the second feed point 612B are respectively located on the adjacent two sides of the first antenna 612; the second antenna 614 has a third feed point 614A and a fourth feed point 614B, the third feed point 614A and the fourth feed point 614B are respectively located on the adjacent two sides of the second antenna 614, the third antenna 616 has a fifth feed point 616A and a sixth feed point 616B, and the fifth feed point 616A and the sixth feed point 616B are respectively located at the second antenna 614 Adjacent two sides of the three antennas 616 .

When one of the one or more feed sources in the electronic device 600 is electrically connected to the first antenna 612 through the first feed point 612A, electrically connected to the second antenna 614 through the third feed point 614A, and electrically connected to the second antenna 614 through the fifth feed point 616A The third antenna 616; at this time, the antenna unit 610 of the electronic device 600 is in the first antenna pattern state.

When one of the one or more feed sources in the electronic device 600 is electrically connected to the first antenna 612 through the second feed point 612B, electrically connected to the second antenna 614 through the fourth feed point 614B, and electrically connected to the second antenna 614 through the sixth feed point 616B The third antenna 616; at this time, the antenna unit 610 of the electronic device 600 is in the second antenna pattern state.

Wherein, FIG. 6A is a schematic diagram of phase comparison of the horizontal section of the first antenna 612 in the first antenna pattern state and the second antenna pattern state. The abscissa in the figure represents the angle of the horizontal plane, and the ordinate represents the phase corresponding to the angle of the horizontal plane; In some angle intervals of the horizontal plane, the phases of the first antenna 612 of the two antenna pattern states have obvious differences at the same angle of the horizontal plane, and the angle intervals of the horizontal plane include: [1°, 12°], [16° , 46°], [54°, 80°], etc.

Figure 6B is a schematic diagram of phase comparison of the horizontal section of the second antenna 614 in the first antenna pattern state and the second antenna pattern state, in which the abscissa represents the angle of the horizontal plane, and the ordinate represents the phase corresponding to the angle of the horizontal plane; in some horizontal planes In the angle interval of , the phases of the second antenna 614 of the two antenna pattern states have obvious differences at the angle of the same horizontal plane, and the angle interval of the horizontal plane includes: [3°, 18°], [20°, 46° °], [48°, 92°]°, etc.

FIG. 6C is a schematic diagram of the phase comparison of the horizontal section of the third antenna 616 in the first antenna pattern state and the second antenna pattern state. The abscissa in the figure represents the angle of the horizontal plane, and the ordinate represents the phase corresponding to the angle of the horizontal plane. In some horizontal planes In the angular range of the horizontal plane, the phases of the third antenna 616 in the two field states have obvious differences in the same incoming wave direction, and the angular range of the horizontal plane includes: [2°, 18°], [20°, 46° ], [48°, 92°], etc.

In this way, it can be seen from FIG. 6A , FIG. 6B and FIG. 6C that when the antenna unit 610 of the electronic device 600 is in different antenna pattern states, there are obvious differences in the phases of the three antennas.

In Fig. 7A, the solid line is the phase difference between the first antenna 612 and the second antenna 614 calculated according to the formula in Fig. 1, and the dotted line is the first antenna under the first antenna pattern state obtained by actual measurement. The phase difference between 612 and the second antenna 614;

The solid line in FIG. 7B is a schematic diagram of the phase difference between the first antenna 612 and the second antenna 614 calculated according to the formula in FIG. The phase difference between the first antenna 612 and the second antenna 614;

It can be seen from FIGS. 7A and 7B that the solid line and the dotted line have non-overlapping parts, that is, there is a gap between the phase difference between the antennas in an ideal state obtained according to the formula in FIG. 1 and the actual phase difference.

FIG. 7C shows the phase difference between the first antenna 612 and the second antenna 614 under the first antenna pattern state and the second antenna pattern state. It can be seen from FIG. 7C that the angle of arrival ranges from 1° to 360°. The two dotted lines of the phase difference between the first antenna pattern state and the second antenna pattern state intersect only once, that is, the phases under the first antenna pattern state and the second antenna pattern state only at this intersection point The difference is the same, and the phase difference between the first antenna pattern state and the second antenna pattern state is different at other angles of arrival. Therefore, it can be concluded that the phase differences under different antenna pattern states are obviously different.

In Fig. 8A, the solid line is the phase difference between the first antenna 612 and the third antenna 616 calculated according to the formula in Fig. 1, and the dotted line is the first antenna under the first antenna pattern state obtained by actual measurement. The phase difference between 612 and the third antenna 616;

The solid line in FIG. 8B is the phase difference between the first antenna 612 and the third antenna 616 calculated according to the formula in FIG. 1, and the dotted line is the first antenna under the second antenna pattern state obtained by actual measurement. The phase difference between 612 and the third antenna 616;

It can be seen from FIGS. 8A and 8B that the solid line and the dotted line have non-overlapping parts, that is, there is a gap between the phase difference between the antennas in an ideal state obtained according to the formula in FIG. 1 and the actual phase difference.

FIG. 8C shows the phase difference between the first antenna 612 and the third antenna 616 under the first antenna pattern state and the second antenna pattern state. It can be seen from FIG. 8C that the range of the angle of arrival is between 1°-360°, The two dotted lines of the phase difference between the first antenna pattern state and the second antenna pattern state only intersect once at about 180° and 220°, that is, only at two intersection points when the first antenna pattern state It is the same as the phase difference in the second antenna pattern state. At other angles of arrival, the phase difference in the first antenna pattern state and the second antenna pattern state are different. Therefore, different antenna pattern states can be obtained There is a clear difference in the phase difference below.

In this way, by switching the feed point of the antenna, the antenna pattern state of the electronic device is changed, and the phase difference between the antennas with the same incoming wave direction under different antenna pattern states is obviously different, by calculating the different antenna pattern states The phase difference between the antennas, and the real angle of arrival of the radio signal is determined according to the phase difference between the antennas of the different antenna pattern states and the mapping relationship table. Furthermore, by switching the feed point of the antenna, the same antenna can generate a variety of different resonances, so that different frequency bands can be obtained under different usage requirements, so that the same antenna can provide a wider frequency band; thus, by switching the antenna's feed point so that one antenna has the effect of multiple antennas.

Please refer to FIG. 9 , which is a schematic diagram illustrating that one of the antennas of the antenna unit of the electronic device in an embodiment of the present application realizes the switching of the antenna pattern state by changing the feed point.

The electronic device 900 includes a switch unit 910 and an antenna 921, the antenna 921 has two feed points: a first feed point 921A and a second feed point 921B, and the first feed point 921A and the second feed point 921B are respectively located on adjacent sides of the antenna , the electronic device 900 can control the connection status of the switch unit 910, wherein the electronic device 900 can control the switch unit 910 so that the electronic device 900 can connect to the antenna 921 through the first feed point 921A or the second feed point 921B, for example, the electronic device controls the switch Unit 910, so that the electronic device is connected to the antenna 921 through the first feed point, and the antenna unit is in the first antenna pattern state; the electronic device controls the switch unit 910, so that the electronic device is connected to the antenna 921 through the second feed point, and the antenna unit is in the first antenna pattern state; Two antenna pattern states.

In the embodiment of the present application, the switch unit 910 is a single-pole double-throw switch (single-pole double-throw, referred to as SP2T), and the electronic device can control the connection state of SP2T, so that the electronic device 900 can pass through the first feed point 921A or the second feed point 921A. The point 921B is connected to the antenna 921, wherein the electronic device 900 is connected to the antenna 921 through different feed points, and the connection states of SP2T are different.

It can be understood that in other embodiments, the positions of the first feed point 921A and the second feed point 921B can be adjusted according to the actual scene, for example, the first feed point 921A and the second feed point 921B can be respectively located on opposite sides of the antenna 921 or same side. Further, if the feed point of the antenna is more than two, such as three, four or more than four, the electronic device can pass through multiple feed points by changing the type of the switch unit 910 and controlling the connection state of the antenna unit 910. One of the points is connected to the antenna. For example, if the antenna has three feed points, the switch unit can be a single-pole three-throw switch. .

In some optional embodiments, each antenna of the electronic device has at least two grounding points, and the connection positions of the at least two grounding points and the corresponding antenna are different, and the electronic device controls one of the at least two grounding points through the switch unit. The connection between the access point and the antenna controls the ground point connected to each antenna so that the electronic equipment is in different antenna pattern states.

Please refer to FIG. 10A and FIG. 10B. FIG. 10A and FIG. 10B are schematic diagrams illustrating the switching of antenna pattern states in another embodiment of the present application. This embodiment is similar to FIG. 6A and FIG. 6B, except that:

The electronic device 600 further includes a fourth antenna 618 having a seventh feed point 618A and an eighth feed point 618B.

In the embodiment of the present application, the first feed point 612A and the second feed point 612B are respectively located on opposite sides of the first antenna 612; the third feed point 614A and the fourth feed point 614B are respectively located on opposite sides of the second antenna 614; The fifth feed point 616A and the sixth feed point 616B are respectively located on opposite sides of the third antenna, and the seventh feed point 618A and the eighth feed point 618B are respectively located on opposite sides of the fourth antenna 618 .

When one of the one or more feed sources in the electronic device 600 is electrically connected to the first antenna 612 through the first feed point 612A, electrically connected to the second antenna 614 through the third feed point 614A, and electrically connected to the second antenna 614 through the fifth feed point 616A The third antenna 616 is electrically connected to the fourth antenna 618 through the seventh feeding point 618A; at this time, the antenna unit 610 of the electronic device 600 is in the third antenna pattern state.

When one of the one or more feed sources in the electronic device 600 is electrically connected to the first antenna 612 through the second feed point 612B, electrically connected to the second antenna 614 through the fourth feed point 614B, and electrically connected to the second antenna 614 through the sixth feed point 616B The third antenna 616 is electrically connected to the fourth antenna 618 through the eighth feeding point 618B; at this time, the antenna unit 610 of the electronic device 600 is in the fourth antenna pattern state.

When one of the one or more feed sources in the electronic device 600 is electrically connected to the first antenna 612 through the second feed point 612A, electrically connected to the second antenna 614 through the fourth feed point 614B, and electrically connected to the second antenna 614 through the sixth feed point 616A The third antenna 616 is electrically connected to the fourth antenna 618 through the eighth feed point 618B; at this time, the antenna unit 610 of the electronic device 600 is in the fifth antenna pattern state.

When one of the one or more feed sources in the electronic device 600 is electrically connected to the first antenna 612 through the second feed point 612B, electrically connected to the second antenna 614 through the fourth feed point 614A, and electrically connected to the second antenna 614 through the sixth feed point 616B The third antenna 616 is electrically connected to the fourth antenna 618 through the eighth feeding point 618A; at this time, the antenna unit 610 of the electronic device 600 is in the sixth antenna pattern state.

It can be understood that the change of the position of the feed point where the feed source is connected to the corresponding antenna will affect the field pattern of the antenna, and then affect the antenna pattern state of the antenna unit, that is, by changing the multiple feed points between the feed source and the corresponding antenna in the electronic device Switching between different feed points in the antenna can realize the switching between the antenna pattern states of the antenna unit. Further, only need to change the position of the feed point between at least one of the multiple antennas in the electronic device and the corresponding feed source, that is, through the switching of different feed points among the multiple feed points of the antenna, the antenna unit can be realized. Switch between antenna pattern states.

Among them, FIG. 11A is a schematic diagram of the phase comparison of the horizontal section of the first antenna 612 in the third antenna pattern state and the fourth antenna pattern state. The abscissa in the figure represents the angle of the horizontal plane, and the ordinate represents the phase corresponding to the angle of the horizontal plane. In some angle intervals of the horizontal plane, the phases of the first antenna 612 in the two field states have obvious differences at the same angle of the horizontal plane.

FIG. 11B is a schematic diagram of the phase comparison of the horizontal section of the second antenna 614 in the third antenna pattern state and the fourth antenna pattern state. The abscissa in the figure represents the angle of the horizontal plane, and the ordinate represents the phase corresponding to the angle of the horizontal plane. In some horizontal planes In the angle range of , the phases of the second antenna 614 in the two field states have obvious differences at the same angle of the horizontal plane.

FIG. 11C is a schematic diagram of phase comparison of the horizontal section of the third antenna 616 in the third antenna pattern state and the fourth antenna pattern state. The abscissa in the figure represents the angle of the horizontal plane, and the ordinate represents the phase corresponding to the angle of the horizontal plane. In some horizontal planes In the angular interval of , the phases of the third antenna 616 in the two field states have obvious differences at the same angle of the horizontal plane.

FIG. 11D is a schematic diagram of phase comparison of the horizontal section of the fourth antenna 618 in the third antenna pattern state and the fourth antenna pattern state. The abscissa in the figure represents the angle of the horizontal plane, and the ordinate represents the phase corresponding to the angle of the horizontal plane. In some horizontal planes In the angular range of , the phases of the fourth antenna 618 in the two field states have obvious differences at the same angle of the horizontal plane.

In this way, it can be seen from FIG. 11A, FIG. 11B, FIG. 11C and FIG. 11D that the antenna unit 610 of the electronic device 600 is in different antenna pattern states, and the phases of the four antennas are obviously different in some angle intervals of the horizontal plane.

The solid line in Fig. 12A is the phase difference between the first antenna 612 and the second antenna 614 under the third antenna pattern state calculated according to the formula in Fig. 1, and the dotted line is the first antenna under the third antenna pattern state obtained by actual measurement The phase difference between 612 and the second antenna 614;

In Fig. 12B, the solid line is the phase difference between the first antenna 612 and the second antenna 614 under the fourth antenna pattern state, and the dotted line is the phase difference between the first antenna 612 and the second antenna 614 under the fourth antenna pattern state obtained by actual measurement. Difference;

It can be seen from FIGS. 12A and 12B that the solid line and the dotted line have non-overlapping parts, that is, there is a gap between the phase difference between the antennas in an ideal state obtained according to the formula in FIG. 1 and the actual phase difference.

FIG. 12C shows the phase difference between the first antenna 612 and the second antenna 614 under the third antenna pattern state and the fourth antenna pattern state. It can be seen from FIG. 12C that the angle of arrival ranges from 1° to 360°. The two dotted lines of the phase difference between the third antenna pattern state and the fourth antenna pattern state only intersect once at about 190°, that is, only at this intersection point, the third antenna pattern state and the fourth antenna pattern state The phase difference is the same under the antenna pattern state, and the phase difference under the third antenna pattern state and the fourth antenna pattern state are different at other angles of arrival. Therefore, it can be concluded that the phase difference under different antenna pattern states has obvious difference.

In Fig. 13A, the solid line is the phase difference between the first antenna 612 and the third antenna 616 under the third antenna pattern state, and the dotted line is the phase difference between the first antenna 612 and the third antenna 616 under the third antenna pattern state obtained by actual measurement. Difference;

In Fig. 13B, the solid line is the phase difference between the first antenna 612 and the third antenna 616 under the fourth antenna pattern state, and the dotted line is the phase difference between the first antenna 612 and the third antenna 616 under the fourth antenna pattern state obtained by actual measurement. Difference;

It can be seen from FIGS. 13A and 13B that the solid line and the dotted line have non-overlapping parts, that is, there is a gap between the phase difference between the antennas in an ideal state obtained according to the formula in FIG. 1 and the actual phase difference.

Figure 13C is the phase difference between the first antenna 612 and the third antenna 616 under the third antenna pattern state and the fourth antenna pattern state, as can be seen from Figure 13C, Figure 12C is the third antenna pattern state and the fourth antenna phase difference The phase difference between the first antenna 612 and the third antenna 616 in the field pattern state can be seen from FIG. 13C. In the range of the angle of arrival between 1°-360°, the phase difference between the third antenna pattern state and the fourth antenna pattern state The two dotted lines of the phase difference below only intersect once at about 180°, that is, the phase difference between the third antenna pattern state and the fourth antenna pattern state is the same only at this intersection point, and the third antenna pattern state at other angles of arrival. The phase differences in the antenna pattern state and the fourth antenna pattern state are different, therefore, it can be concluded that the phase differences in different antenna pattern states are obviously different.

In Fig. 14A, the solid line is the phase difference between the first antenna 612 and the fourth antenna 618 under the third antenna pattern state, and the dotted line is the phase difference between the first antenna 612 and the fourth antenna 618 under the third antenna pattern state obtained by actual measurement. Difference;

In Fig. 14B, the solid line is the phase difference between the first antenna 612 and the fourth antenna 618 under the fourth antenna pattern state, and the dotted line is the phase difference between the first antenna 612 and the fourth antenna 618 under the fourth antenna pattern state obtained by actual measurement. Difference;

It can be seen from FIGS. 14A and 14B that the solid line and the dotted line have non-overlapping parts, that is, there is a gap between the phase difference between the antennas in an ideal state obtained according to the formula in FIG. 1 and the actual phase difference.

Figure 14C is the phase difference between the first antenna 612 and the fourth antenna 618 under the third antenna pattern state and the fourth antenna pattern state, as can be seen from Figure 14C, Figure 14C is the third antenna pattern state and the fourth antenna phase difference The phase difference between the first antenna 612 and the fourth antenna 618 in the field pattern state can be seen from FIG. 14C. When the angle of arrival ranges between 1°-360°, the phase difference between the third antenna pattern state and the fourth antenna pattern state The two dotted lines of the phase difference below only intersect once at about 180°, that is, the phase difference between the third antenna pattern state and the fourth antenna pattern state is the same only at this intersection point, and the third antenna pattern state at other angles of arrival. The phase differences in the antenna pattern state and the fourth antenna pattern state are different, therefore, it can be concluded that the phase differences in different antenna pattern states are obviously different.

In this way, by switching the feed point of the antenna, that is, switching the feed point of the electronic device connected to the antenna from one side to the opposite side, in order to realize the change of the antenna pattern state of the antenna unit, the same incoming wave under the two antenna pattern states There is a clear difference in the phase difference between the antennas in the same direction.

It can be understood that each antenna can also have 3, 4, 5 or more than 5 feed points, wherein the positions of the multiple feed points of each antenna are not the same, and the multiple feed points can be evenly spaced in the Corresponding to the peripheral side of the antenna, multiple feed points can also be distributed only on the same side of the corresponding antenna. Of course, the number of feed points and the distribution positions of the multiple feed points can also be set according to actual needs.

The electronic device can be connected to one of the multiple feed points by switching the feed source, so as to change the antenna pattern state of the antenna unit of the electronic device. It can be understood that the electronic device can change the feed points of all antennas at the same time to change the antenna pattern state of the antenna unit, and can only change the feed point of at least one antenna among the multiple antennas in the electronic device to change the antenna field of the antenna unit. type state.

In this embodiment of the present application, antenna 1 may be called a first antenna, antenna 2 may be called a second antenna, and antenna 3 may be called a third antenna.

An embodiment of the present application provides a method for estimating the angle of arrival of a signal. The method may include: the electronic device has a positioning function. When the user uses the electronic device for positioning, the electronic device can receive the radio signal S1 through the antenna, and the electronic device stores different In the field state, the mapping relationship between the phase difference between the antennas and the angle of arrival of the radio signal; the electronic device can calculate the first phase difference between the antennas when receiving the radio signal S1 in the first antenna pattern state; the electronic device The first phase difference can be matched with the mapping relationship table to obtain a first set of signal arrival angles matched with the first phase difference, and the first set of signal arrival angles includes at least two signal arrival angles; The first antenna pattern state is switched to the second antenna pattern state, the second phase difference of the antenna unit in the second antenna pattern state is determined, and the mapping relationship between the phase difference between the antennas and the signal arrival angle in the second antenna pattern state is matched. , determine a second set of arrival angles matched with the second phase difference, the second set of arrival angles includes at least one arrival angle; since the received signals under the first antenna pattern state and the second antenna pattern state are true The angle of arrival remains unchanged, and the angle of arrival at which the first set of arrival angles and the second set of arrival angles overlap is the real angle of arrival. In this way, the electronic device can more accurately estimate the angle of arrival of the radio signal received by the electronic device.

The electronic device in the embodiment of the present application may have two antennas, or three antennas, and four or more antennas. The embodiment of the present application does not limit the number of antennas in the electronic device. The following embodiments are described by taking an electronic device with three antennas as an example.

FIG. 15 exemplarily shows a schematic flowchart of a method for estimating a signal angle of arrival provided by an embodiment of the present application. As shown in Figure 7, a method for estimating the angle of arrival of a signal provided in the embodiment of the present application may include the following steps:

S150. The electronic device receives the radio signal S1 through the first antenna, the second antenna, and the third antenna. The electronic device stores the phases of the first antenna and the second antenna when receiving radio signals from different directions under the antenna field state set. difference, and a mapping relationship table between the phase difference between the first antenna and the third antenna and the angle of arrival of the radio signal.

There may be a first antenna and a second antenna and a third antenna in the electronic device. When the user locates through the electronic device, the electronic device can receive the radio signal S1 through the first antenna, the second antenna, and the third antenna. The radio signal S1 may be a signal transmitted by a base station, may also be a signal transmitted by a router, or may be a signal transmitted by other electronic devices, which is not limited herein.

Before receiving the radio signal S1, the electronic device may store the phase difference between the first antenna and the second antenna, and the A mapping relationship table T1 between the phase difference with the third antenna and the angle of arrival of the radio signal. The mapping relationship table T1 may be established according to the above steps S401-S407. The mapping relationship table T1 may be the mapping relationship table shown in Table 3 above, or other types of mapping relationship tables. This embodiment of the present application does not limit it.

S151. The electronic device determines the antenna pattern state for receiving the radio signal S1 and calculates the first phase difference between the first antenna and the second antenna and the second phase difference between the first antenna and the third antenna when receiving the radio signal S1.

When the electronic device realizes switching of different antenna pattern states through the circuit unit shown in Figure 9, when the antenna switch is in the first position, the feed source is electrically connected to the first antenna through the first feed point, and other feed sources pass through the corresponding feed point Connect the corresponding antenna, the antenna unit of the electronic device is in the first antenna pattern state; the feed source is electrically connected to the first antenna through the second feed point, and other feed sources are connected to the corresponding antenna through the corresponding feed point, the antenna unit of the electronic device In the state of the second antenna pattern. Of course, the electronic device can also determine the corresponding antenna pattern state in other ways.

When receiving the radio signal S1, the electronic device may calculate a first phase difference between the first antenna and the second antenna and a second phase difference between the first antenna and the third antenna.

When the first antenna of the electronic device receives the radio signal S1, the electronic device can determine the phase of the radio signal S1 received by the first antenna

When the second antenna of the electronic device receives the radio signal S1, the electronic device can determine the phase of the radio signal S1 received by the second antenna

When the third antenna of the electronic device receives the radio signal S1, the electronic device can determine the phase of the radio signal S1 received by the third antenna

According to the phase of the radio signal S1 received by the first antenna, the electronic device can

and the phase of the radio signal S1 received by the second antenna

It is determined that when receiving the radio signal S1, the phase difference PD1 between the first antenna and the second antenna is

and the phase of the radio signal S1 received by the third antenna

It is determined that when receiving the radio signal S1, the phase difference PD2 between the first antenna and the third antenna is

S152. The electronic device determines a first set of arrival angles matching the first phase difference PD1 and the second phase difference PD2 according to the antenna pattern state, the first phase difference PD1, the second phase difference PD2, and the mapping relationship table T1.

Wherein the first set of angles of arrival includes at least two angles of arrival.

In a possible implementation, the electronic device determines the first angle-of-arrival subset with the first phase difference PD1 according to the first phase difference PD1 and the mapping relationship table T1, and determines the angle-of-arrival subset with the first phase difference PD2 and the mapping relationship table T1 according to the second phase difference PD2 and the mapping relationship table T1. The second angle-of-arrival subset of the second phase difference PD2 determines the intersection of the first angle-of-arrival subset and the second angle-of-arrival subset, and the intersection is the first angle-of-arrival set.

Exemplarily, the first phase difference between the first antenna and the second antenna is 1.2π, and 1.2π in the mapping relationship table T1 corresponds to three arrival angles: 60°, 120° and 150°; The second phase difference is 0.5π, and 1.2π in the mapping relationship table T1 corresponds to three arrival angles: 60°, 120° and 210°; thus, the first set of arrival angles are 60° and 120°.

Optionally, the mapping relationship table T1 may be stored in an electronic device, or in a cloud server or a server. When the mapping relationship table T1 is stored in the cloud server or server, the electronic device can send the first phase difference PD1 and the second phase difference PD2 to the cloud server or server, and the cloud server or server can match the first phase difference PD1 , the first arrival angle set corresponding to the second phase difference PD2 and the arrival angle in the mapping relationship table T1.

The electronic device may calculate the similarity between the first phase difference and the second phase difference and the phase differences corresponding to all arrival angles in the mapping relationship table.

In a possible implementation manner, the electronic device may determine the similarity by calculating a sum of differences between the first phase difference and the second phase difference and phase differences corresponding to all arrival angles in the mapping relationship table. The larger the sum of differences, the lower the similarity; conversely, the higher the sum of differences, the higher the similarity.

For example, if the mapping relationship table T1 is the mapping relationship table shown in Table 4. The formula for calculating the sum of the phase difference values corresponding to all arrival angles in the first phase difference, the second phase difference and the image relationship table can be as follows:

Error0(i°)＝|PD1-E(i°)|+|PD2-F(i°)| Formula 1

Wherein, i° is the arrival angle of the radio signal, i=0,1,2,...,359.

It can be understood that the smaller Error0(i°), that is, the higher the similarity between the first phase difference PD1, the second phase difference PD2 and the phase difference corresponding to the arrival angle i°. The electronic device can calculate Error0(0°), Error0(1°), Error0(2°), . . . , Error0(359°) according to the above formula 1.

The electronic device can compare the magnitudes of Error0(0°), Error0(1°), Error0(2°), . . . , Error0(359°). The electronic device takes the angle corresponding to the smallest difference sum as the arrival angle of the radio signal S1. For example, if Error0(0°) is the smallest, the electronic device determines that the arrival angle of the radio signal S1 is 0°. If Error0(1°) is the smallest, the electronic device determines that the angle of arrival of the radio signal S1 is 1°. If Error0 (359°) is the smallest, then the electronic device determines that the arrival angle of the radio signal S1 is 359°. And a first set of arrival angles is formed according to the determined arrival angles.

S153. The electronic device switches the antenna pattern state, and calculates the third phase difference PD3 between the first antenna and the second antenna and the first antenna and the third antenna when receiving the radio signal S1 under the switched antenna pattern state The fourth phase difference PD4.

In a possible implementation manner, the electronic device selects different feed points of the antenna through a switch, so as to realize switching of different antenna pattern states of the antenna unit.

The calculation methods of the third phase difference and the fourth phase difference are as described in S151, and will not be repeated here.

S154. The electronic device determines the second arrival angle set matching the third phase difference PD3 and the fourth phase difference PD4 according to the switched antenna pattern state, the third phase difference PD3, the fourth phase difference PD4, and the mapping relationship table T1 .

Wherein the second set of angles of arrival includes at least one angle of arrival.

In a possible implementation, the electronic device determines the first angle-of-arrival subset with the third phase difference PD3 according to the third phase difference PD3 and the mapping relationship table T1, and determines the angle-of-arrival subset with the third phase difference PD4 and the mapping relationship table T1 according to the fourth phase difference PD4 and the mapping relationship table T1. The fourth angle-of-arrival subset of the fourth phase difference PD4 determines the intersection of the third angle-of-arrival subset and the fourth angle-of-arrival subset, and the intersection is the second angle-of-arrival set.

S154. Determine a real angle of arrival according to the first set of angles of arrival and the second set of angles of arrival.

In a possible implementation manner, the intersection of the first set of arrival angles and the second set of arrival angles is determined, the intersection includes only one arrival angle, and the intersection is the real arrival angle.

According to a method for estimating the angle of arrival of a signal provided by the embodiment of the present application, when the user uses the electronic device for positioning, the electronic device can receive the radio signal S1 through the antenna, and the electronic device stores the information of all antenna pattern states and the distance between the antennas. The mapping relationship table between the phase difference of the radio signal and the arrival angle of the radio signal; the electronic device can determine the current antenna pattern state and calculate the phase difference between the antennas when receiving the radio signal S1, and determine the phase difference corresponding to the phase difference in the mapping relationship table Matching first set of arrival angles; switch the antenna pattern state of the electronic device, and calculate the phase difference under the switched antenna pattern state, and the electronic device determines the second arrival angle set in the mapping relationship table that matches the phase difference , determine the real angle of arrival according to the first set of arrival angles and the second set of arrival angles. Since, under different antenna pattern states, the phase difference between antennas is significantly different and under the same antenna pattern state, the same phase difference value may correspond to different angles of arrival, by obtaining the phase difference under different antenna pattern states, and based on The phase difference under different antenna pattern states determines the corresponding angle of arrival. In this way, the electronic device can more accurately estimate the angle of arrival of the radio signal received by the electronic device.

In a possible implementation manner, the intersection of the first angle of arrival set and the second angle of arrival set is determined, and the intersection includes at least two angles of arrival, and steps S153 and S154 are re-executed to obtain another antenna pattern state Phase difference, and determine the third set of arrival angles that the phase difference matches, and then determine the intersection of the first set of arrival angles, the second set of arrival angles and the third set of arrival angles, and repeat the above steps until there is only one set of arrival angles in the obtained intersection Arrival angle, the arrival angle is the real arrival angle.

It can be understood that, the electronic device provided in the embodiment of the present application may include the first antenna and the second antenna. The electronic device may receive the radio signal S1 through the first antenna and the second antenna.

In a possible implementation, the electronic device receives the radio signal S1 through the first antenna and the second antenna. When the electronic device stores radio signals of different azimuths, the phase difference between the first antenna and the second antenna and the angle of arrival Mapping relationship table T2; in the first antenna pattern state, the electronic device calculates the first phase difference between the first antenna and the second antenna when receiving the radio signal S1; determine the first phase difference that matches the first phase difference in the mapping relationship table T2 A set of arrival angles; when switching to the second antenna pattern state, the electronic device calculates the second phase difference between the first antenna and the second antenna when receiving the radio signal S1 with the same incoming wave direction; determine the second phase difference between the first antenna and the second antenna in the mapping relationship table T2 and The second set of angles of arrival matched with the second phase difference determines the real angle of arrival according to the first set of angles of arrival and the second set of angles of arrival. Here, reference may be made to the description in steps S150-S154, which will not be repeated here. For the establishment process of the mapping relationship table T2, reference may be made to the descriptions in the above steps S401-S407, which will not be repeated here.

It is understandable that the electronic device can have more antennas here. When the number of antennas is greater than 3, the process of estimating the angle of arrival of the signal by the electronic device can refer to the description in steps S150-S154, which will not be repeated here.

In the embodiment of the present application, both the mapping relationship table T1 and the mapping relationship table T2 may be referred to as the first mapping table.

FIG. 16 exemplarily shows a schematic flowchart of a method for estimating a signal angle of arrival provided by an embodiment of the present application. As shown in Figure 16, a signal angle of arrival estimation method provided in the embodiment of the present application may include the following steps:

S160. The electronic device receives the radio signal S1 through the first antenna, the second antenna, and the third antenna. The electronic device stores the data of the first antenna and the second antenna when the electronic device receives radio signals from different directions under the antenna field state set. The phase difference of the antennas and the mapping relationship table between the phase difference of the first antenna and the third antenna and the angle of arrival of the radio signal.

The set of antenna pattern states includes at least two antenna pattern states achievable by the electronic device. For example, if the electronic device switches the antenna pattern state by switching the antenna feed point, and the first antenna, the second antenna, and the third antenna all have Two feed points; if the first antenna, the second antenna, and the third antenna need to switch feed points each time the antenna pattern state is switched, then the antenna pattern state set of the electronic device has two antenna pattern states; If the electronic device only needs to switch the feed point of any one of the first antenna, the second antenna, and the third antenna each time the antenna pattern state is switched, then the antenna pattern state set of the electronic device has six antenna patterns state.

When receiving radio signals from different directions, the electronic device stores the phase difference between the first antenna and the second antenna, the phase difference between the first antenna and the third antenna and the angle of arrival of the radio signal under the set of antenna pattern states. Mapping table. For the process of establishing the mapping relationship table by the electronic device, reference may be made to the above step S401-step S407, which will not be repeated here.

S161. The electronic device determines the current antenna pattern state and calculates a first phase difference between the first antenna and the second antenna and a second phase difference between the first antenna and the third antenna when receiving the radio signal S1.

S162. The electronic device records and stores the first phase difference between the first antenna and the second antenna and the second phase difference between the first antenna and the third antenna under the current antenna pattern state.

S163. The electronic device determines whether to record and store the first phase difference between the first antenna and the second antenna and the second phase difference between the first antenna and the third antenna in all antenna pattern states of the antenna pattern state set. If the electronic device does not record and store the first phase difference between the first antenna and the second antenna and the second phase difference between the first antenna and the third antenna in all antenna pattern states of the antenna pattern state set, execute S164; If the electronic device has recorded and stored the first phase difference between the first antenna and the second antenna and the second phase difference between the first antenna and the third antenna in all the antenna pattern states of the antenna pattern state set, execute S165.

S164. The electronic device determines that the antenna pattern state has not recorded and stored the first phase difference between the first antenna and the second antenna and the second phase difference between the first antenna and the third antenna, and switches the current antenna pattern state to Unrecorded and stored antenna pattern states. Then jump to step S161.

Specifically, according to the antenna pattern state set and the antenna pattern state stored in the electronic device, the electronic device determines that the first phase difference between the first antenna and the second antenna and the first phase difference between the first antenna and the second antenna are not recorded and stored in the antenna pattern state set. The antenna pattern state of the second phase difference of the third antenna.

S165. The electronic device determines the real angle of arrival according to the phase difference between the first antenna and the second antenna and the phase difference between the first antenna and the third antenna when the electronic device receives the radio signal under the mapping relationship table and the stored antenna pattern state set.

Through a method for estimating the angle of arrival of a signal provided by the embodiment of this application, when the user uses an electronic device for positioning, the electronic device can receive the radio signal S1 through the antenna, and the electronic device stores the phase between the antennas under the antenna pattern state set The mapping relationship between the difference and the angle of arrival of the radio signal; the electronic device can calculate the phase difference between the antennas when receiving the radio signal S1 under the antenna pattern state set, because the electronic device is in different antenna pattern states, the antenna The arrival angles of the received signals are all the same, but the phase difference between the antennas is obviously different under different antenna pattern states. By calculating the phase difference under multiple antenna pattern states, the same phase difference corresponds to multiple arrival angles. question. In this way, the electronic device can more accurately estimate the angle of arrival of the radio signal received by the electronic device.

Understandably, in other embodiments, the mathematical regression model is queried by establishing the angle of arrival. In the mathematical regression model: the phase difference is set as a feature value, and the angle of arrival corresponding to the phase difference is set as a tag value; The phase difference value in the type state is input into the mathematical regression model to obtain the angle of arrival of the radio signal received by the electronic device.

In some embodiments, before the electronic device estimates the angle of arrival of the signal, an arrival angle calculation function may be stored in the electronic device. By inputting the phase difference and the identification of the corresponding antenna pattern state into the angle-of-arrival calculation function, the angle-of-arrival calculation function can output the angle of arrival corresponding to the phase difference. For example, the phase difference 3° input to the angle-of-arrival calculation function and the identification 1 of the corresponding antenna pattern state, the angle-of-arrival output of the angle-of-arrival calculation function are 30° and 120°; the phase difference input to the angle-of-arrival calculation function is 3° , 7° and the

corresponding signs

1 and 2 of the antenna pattern state, the arrival angle output by the angle-of-arrival calculation function is 120°. The antenna pattern state identifier is used to identify the corresponding antenna pattern state.

Optionally, the angle-of-arrival calculation function may be a machine model trained by historical data of the electronic device based on a mathematical algorithm, wherein the mathematical algorithm may be a neural network algorithm, a random forest algorithm, etc., and the historical data is the antenna unit of the electronic device. The different angles of arrival under the set of antenna pattern states, and the set of phase differences corresponding to different angles of arrival, the historical data can be the data of the mapping relationship table recorded in the manner described in Figure 4, or the data obtained by other means, In this regard, this application does not make a limitation. Of course, the angle-of-arrival calculation function may also be determined based on other methods, for example, a multi-dimensional function formed based on the calculation rules between the angle-of-arrival and the phase difference, and the implementation of the function is not limited in this application.

In this way, when the electronic device estimates the angle of arrival of the signal, the electronic device controls the antenna unit to switch at least once among multiple antenna patterns, for example, switching from the first antenna pattern state to the second antenna pattern state. Obtain at least two phase differences corresponding to at least two antenna pattern states, for example, the phase difference between the first antenna and the second antenna and the phase difference between the first antenna and the third antenna when receiving radio signals with the same angle of arrival; The two phase differences and the corresponding antenna pattern state identification are input into the angle of arrival calculation function; if the output of the angle of arrival calculation function includes only one angle of arrival, then the angle of arrival is the angle of arrival of the signal; if the angle of arrival calculation function outputs at least two angle of arrival, the electronic device controls the antenna unit to switch again under multiple antenna pattern states, for example, switching from the second antenna pattern state to the third antenna pattern state, and the obtained phase difference and the corresponding antenna pattern state In the identification input calculation function of the angle of arrival, the above steps are repeated until the output of the calculation function of the angle of arrival includes only one angle of arrival. Optionally, in another embodiment, when the electronic device estimates the angle of arrival of the signal, the electronic device controls the different antenna field shapes of the antenna unit in the multiple antenna field shapes to switch sequentially until each antenna unit obtains The phase difference between the antennas corresponding to the antenna pattern unit; the phase difference and the identification of the corresponding antenna pattern state are input into the angle of arrival calculation function; the angle of arrival output by the angle of arrival calculation function is the angle of arrival of the signal.

As shown in FIG. 17 , the electronic device 100 may include an antenna unit 10 , a radio frequency front-end unit 20 , and a signal processing and control unit 30 . FIG. 17 exemplarily shows a schematic flowchart of a method for estimating a signal angle of arrival provided by an embodiment of the present application. As shown in Figure 17, a signal angle of arrival estimation method provided in the embodiment of the present application may include the following steps:

S171. Receive a radio signal.

Here, the electronic device receives radio signals through the antenna unit, and the antenna unit 10 may include 2 antennas, or 3 antennas, or 4 antennas, or more than 4 antennas. The number of antennas in the antenna unit 10 is not limited here.

S172. Send the received radio signal.

The antenna unit 10 of the electronic device 100 sends the received radio signal to the RF front-end unit 20 .

The radio frequency front-end unit may include multiple radio frequency front-end modules. It can be understood that one antenna may correspond to one radio frequency front-end module. Each antenna can send the received radio signal to the corresponding radio frequency front-end module. Taking antenna unit 10 with two antennas (antenna 1 and antenna 2 ) as an example, radio frequency front-end unit 20 may include radio frequency front-end module 1 corresponding to antenna 1 and radio frequency front-end module 2 corresponding to antenna 2 . The antenna 1 can send the received radio signal to the radio frequency front-end module 1 . The antenna 2 can send the received radio signal to the radio frequency front-end module 2 .

S173. Convert the radio signal into a baseband signal.

The RF front-end unit 20 of the electronic device 100 converts radio signals into baseband signals.

For example, the radio frequency front-end module 1 can convert the radio signal received by the antenna 1 into a baseband signal 1 . The radio frequency front-end module 2 can convert the radio signal received by the antenna 2 into a baseband signal 2 .

S174. Send the baseband signal.

The radio frequency front-end unit 20 of the electronic device 100 sends a baseband signal to the signal processing and control unit 30 .

For example, the RF front-end module 1 and the RF front-end module 2 in the RF front-end unit 20 may send the baseband signal 1 and the baseband signal 2 to the signal processing and control unit 30 respectively.

S175. Calculate the phase difference between the received baseband signals.

The signal processing and control unit 30 of the electronic device 100 calculates the phase difference between the received baseband signals.

For example, the signal processing and control unit 30 can calculate the phase difference between the baseband signal 1 and the baseband signal 2 . Here, for step S175, reference may be made to the description of calculating the phase difference by the electronic device in step S151, which will not be repeated here.

S176. Match the calculated phase difference between the antennas and the current antenna pattern state with the mapping relationship table, so as to determine a first set of arrival angles matching the phase difference.

The mapping relationship table stores the phase differences corresponding to all angles of arrival under the antenna pattern state set, and the antenna pattern state set includes all antenna pattern states supported by the electronic device.

The signal processing and control unit 30 of the electronic device 100 matches the calculated phase difference and the current antenna pattern state with the mapping relationship table to determine the first set of arrival angles matching the phase difference.

Here, for the mapping relationship table, reference may be made to the description of the mapping relationship table in the above steps, which will not be repeated here.

S177. Switch the antenna pattern state, and calculate the phase difference between the antennas when receiving the radio signal S1 in the switched antenna pattern state.

The signal processing and control unit 30 of the electronic device 100 switches the antenna pattern state, and calculates the phase difference between the antennas when receiving the radio signal S1 in the switched antenna pattern state.

S178. Determine a second set of arrival angles matching the phase difference according to the phase difference between the antennas in the switched antenna pattern state and the mapping relationship table.

The signal processing and control unit 30 of the electronic device 100 determines the second set of arrival angles matching the phase difference according to the phase difference between the antennas in the switched antenna pattern state and the mapping relationship table.

S179. Determine a real angle of arrival according to the first set of angles of arrival and the second set of angles of arrival.

The signal processing and control unit 30 of the electronic device 100 determines the real angle of arrival according to the first set of angles of arrival and the second set of angles of arrival.

An embodiment of the present application provides a method for estimating the angle of arrival of a signal, the method may include: when the user uses an electronic device for positioning, the electronic device may receive the radio signal S1 through the antenna, and the electronic device stores a set of antenna pattern states Below is the mapping relationship table between the phase difference between the antennas and the arrival angle of the radio signal; the electronic device can calculate the phase difference between the antennas and determine the phase difference between the antennas and determine the phase difference in the mapping relationship table when receiving the radio signal S1 in the current antenna pattern state. The first angle-of-arrival set that matches the difference; switch the antenna pattern state of the electronic device, and calculate the phase difference corresponding to the switched antenna pattern state, and the electronic device determines the second phase difference that matches the second phase difference in the mapping relationship table. The second set of arrival angles is to determine the real arrival angle according to the first set of arrival angles and the second set of arrival angles. Since, under different antenna pattern states, the phase difference between antennas is significantly different and under the same antenna pattern state, the same phase difference value may correspond to different angles of arrival, by obtaining the phase difference under different antenna pattern states, and based on The phase difference under different antenna pattern states determines the corresponding angle of arrival. In this way, the accuracy rate of the angle of arrival of the signal estimated by the electronic device can be improved.

Please refer to Figure 18A and Figure 18B, where Figure 18A is the simulation result of the electronic device estimating the angle of arrival through only one antenna pattern state, the antenna pattern state of the electronic device in Figure 18A is fixed and only one, from Figure 18A it can be obtained It is found that when the electronic equipment estimates the angle of arrival through the phase difference between the antennas of the single antenna pattern state, the angle of arrival of many incoming wave directions will be confused, such as 25°~45°, 130°~150°, 205°~225° °, 310°～330°, all have very serious confusion (over 100 degree confusion); in Figure 18B, the electronic device has two antenna field states and the electronic device can switch between the two antenna field states. The angle of arrival is estimated by switching between the two antenna pattern states. From Figure 18B, it can be concluded that when the electronic device estimates the angle of arrival through the phase difference between the antennas in the dual antenna pattern state, the direction of arrival where the angle of arrival is seriously confused is reduced to 30 to 40 degrees and 210 to 220 degrees only, where Fig. 18 is an embodiment of the present application. That is, the present application estimates the angle of arrival by obtaining the phase difference between the antennas of the incoming signal under multiple antenna pattern states, which can reduce the error of the angle of arrival and improve the accuracy of the angle of arrival.

The exemplary electronic device 100 provided by the embodiment of the present application is firstly introduced below.

FIG. 19 is a schematic structural diagram of an electronic device 100 provided by an embodiment of the present application.

Hereinafter, the embodiment will be specifically described by taking the electronic device 100 as an example. It should be understood that electronic device 100 may have more or fewer components than shown in the figures, may combine two or more components, or may have a different configuration of components. The various components shown in the figures may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.

The electronic device 100 may include: a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, and an antenna 2. Mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, earphone jack 170D, sensor module 180, button 190, motor 191, indicator 192, camera 193, display screen 194 and A subscriber identification module (subscriber identification module, SIM) card interface 195 and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, bone conduction sensor 180M, etc.

It can be understood that, the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the electronic device 100 . In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown in the figure, or combine certain components, or separate certain components, or arrange different components. The illustrated components can be realized in hardware, software or a combination of software and hardware.

The processor 110 may include one or more processing units, for example: the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, memory, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processor (neural-network processing unit, NPU) wait. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

Wherein, the controller may be the nerve center and command center of the electronic device 100 . The controller can generate an operation control signal according to the instruction opcode and timing signal, and complete the control of fetching and executing the instruction.

A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in processor 110 is a cache memory. The memory may hold instructions or data that the processor 110 has just used or recycled. If the processor 110 needs to use the instruction or data again, it can be called directly from the memory. Repeated access is avoided, and the waiting time of the processor 110 is reduced, thereby improving the efficiency of the system.

In some embodiments, processor 110 may include one or more interfaces. The interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous transmitter (universal asynchronous receiver/transmitter, UART) interface, mobile industry processor interface (mobile industry processor interface, MIPI), general-purpose input and output (general-purpose input/output, GPIO) interface, subscriber identity module (subscriber identity module, SIM) interface, and /or universal serial bus (universal serial bus, USB) interface, etc.

The charging management module 140 is configured to receive a charging input from a charger. Wherein, the charger may be a wireless charger or a wired charger.

The power management module 141 is used for connecting the battery 142 , the charging management module 140 and the processor 110 . The power management module 141 receives the input from the battery 142 and/or the charging management module 140 to provide power for the processor 110 , the internal memory 121 , the external memory, the display screen 194 , the camera 193 , and the wireless communication module 160 .

The wireless communication function of the electronic device 100 can be realized by the antenna 1 , the antenna 2 , the mobile communication module 150 , the wireless communication module 160 , a modem processor, a baseband processor, and the like.

Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 100 may be used to cover single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: Antenna 1 can be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

It can be understood that the electronic device 100 may further include more antennas, such as the antenna 3 , the antenna 4 , . . . , and the antenna N. Antenna 3 , antenna 4 , . . . , and antenna N are used to receive radio signals.

The antenna 1 and the antenna 2 in the electronic device may be external antennas or built-in antennas, which are not limited here. The types of external antennas may include: monopole antennas, helical antennas, and PCB (Printed circuit board, printed circuit board) helical antennas. Built-in antennas can include: microstrip patch antenna, slot antenna, IFA antenna (Inverted-F Antenna, inverted F antenna), PIFA antenna (planar Inverted-F Antenna, planar inverted F antenna), FPC (flexible printed circuit, flexible printing circuits) antennas, etc.

There are many critical parameters that affect antenna performance and can usually be adjusted during the antenna design process, such as resonant frequency, impedance, gain, aperture or radiation pattern, polarization, efficiency, and bandwidth. In addition, the transmit antenna has a maximum power rating, while the receive antenna has noise rejection parameters.

In some embodiments, the antenna 1 and the antenna 2 may further include a radio frequency front-end module. The radio frequency front-end module corresponding to the antenna 1 is used to convert the radio signal (for example, electromagnetic wave) received by the antenna 1 into a baseband signal. The radio frequency front-end module corresponding to the antenna 2 is used to convert the radio signal received by the antenna 2 into a baseband signal.

Optionally, the antenna 1 and the radio frequency front-end module corresponding to the antenna 1 may be coupled in one antenna chip. The antenna 2 and the radio frequency front-end module corresponding to the antenna 2 may be coupled in one antenna chip. The mobile communication module 150 can provide wireless communication solutions including 2G/3G/4G/5G applied on the electronic device 100 . The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA) and the like. The mobile communication module 150 can receive electromagnetic waves through the antenna 1, filter and amplify the received electromagnetic waves, and send them to the modem processor for demodulation. The mobile communication module 150 can also amplify the signals modulated by the modem processor, and convert them into electromagnetic waves and radiate them through the antenna 1 . In some embodiments, at least part of the functional modules of the mobile communication module 150 may be set in the processor 110 . In some embodiments, at least part of the functional modules of the mobile communication module 150 and at least part of the modules of the processor 110 may be set in the same device.

A modem processor may include a modulator and a demodulator. Wherein, the modulator is used for modulating the low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator sends the demodulated low-frequency baseband signal to the baseband processor for processing. The low-frequency baseband signal is passed to the application processor after being processed by the baseband processor. The application processor outputs sound signals through audio equipment (not limited to speaker 170A, receiver 170B, etc.), or displays images or videos through display screen 194 . In some embodiments, the modem processor may be a stand-alone device. In some other embodiments, the modem processor may be independent from the processor 110, and be set in the same device as the mobile communication module 150 or other functional modules.

The wireless communication module 160 can provide wireless local area networks (wireless local area networks, WLAN) (such as wireless fidelity (Wireless Fidelity, Wi-Fi) network), bluetooth (bluetooth, BT), global navigation satellite, etc. applied on the electronic device 100. System (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2 , frequency-modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110 . The wireless communication module 160 can also receive the signal to be sent from the processor 110 , frequency-modulate it, amplify it, and convert it into electromagnetic waves through the antenna 2 for radiation.

In some embodiments, the antenna 1 of the electronic device 100 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the electronic device 100 can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (code division multiple access, CDMA), broadband Code division multiple access (wideband code division multiple access, WCDMA), time division code division multiple access (time-division code division multiple access, TD-SCDMA), long term evolution (long term evolution, LTE), BT, GNSS, WLAN, NFC , FM, and/or IR techniques, etc. The GNSS may include a global positioning system (global positioning system, GPS), a global navigation satellite system (global navigation satellite system, GLONASS), a Beidou navigation satellite system (beidou navigation satellite system, BDS), a quasi-zenith satellite system (quasi -zenith satellite system (QZSS) and/or satellite based augmentation systems (SBAS).

The electronic device 100 realizes the display function through the GPU, the display screen 194 , and the application processor. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and the application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or change display information.

The display screen 194 is used to display images, videos and the like. The display screen 194 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active matrix organic light emitting diode or an active matrix organic light emitting diode (active-matrix organic light emitting diode, AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light emitting diodes (quantum dot light emitting diodes, QLED), etc. In some embodiments, the electronic device 100 may include 1 or N display screens 194 , where N is a positive integer greater than 1.

The electronic device 100 can realize the shooting function through the ISP, the camera 193 , the video codec, the GPU, the display screen 194 and the application processor.

The ISP is used for processing the data fed back by the camera 193 .

Camera 193 is used to capture still images or video.

Digital signal processors are used to process digital signals. In addition to digital image signals, they can also process other digital signals.

Video codecs are used to compress or decompress digital video. The electronic device 100 may support one or more video codecs. In this way, the electronic device 100 can play or record videos in various encoding formats, for example: moving picture experts group (moving picture experts group, MPEG) 1, MPEG2, MPEG3, MPEG4 and so on.

The NPU is a neural-network (NN) computing processor. By referring to the structure of biological neural networks, such as the transfer mode between neurons in the human brain, it can quickly process input information and continuously learn by itself. Applications such as intelligent cognition of the electronic device 100 can be realized through the NPU, such as image recognition, face recognition, speech recognition, text understanding, and the like.

The internal memory 121 may include one or more random access memories (random access memory, RAM) and one or more non-volatile memories (non-volatile memory, NVM).

Random access memory can include static random-access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous dynamic random access memory, SDRAM), double data rate synchronous Dynamic random access memory (double data rate synchronous dynamic random access memory, DDR SDRAM, such as the fifth generation DDR SDRAM is generally called DDR5SDRAM), etc.;

Non-volatile memory may include magnetic disk storage devices, flash memory (flash memory).

According to the operating principle, flash memory can include NOR FLASH, NAND FLASH, 3D NAND FLASH, etc. According to the potential order of storage cells, it can include single-level storage cells (single-level cell, SLC), multi-level storage cells (multi-level cell, MLC), three-level storage unit (triple-level cell, TLC), fourth-level storage unit (quad-level cell, QLC), etc., can include universal flash storage (English: universal flash storage, UFS) according to storage specifications , embedded multimedia memory card (embedded multi media Card, eMMC), etc.

The random access memory can be directly read and written by the processor 110, and can be used to store executable programs (such as machine instructions) of an operating system or other running programs, and can also be used to store data of users and application programs.

The non-volatile memory can also store executable programs and data of users and application programs, etc., and can be loaded into the random access memory in advance for the processor 110 to directly read and write.

The electronic device 100 can implement audio functions through the audio module 170 , the speaker 170A, the receiver 170B, the microphone 170C, the earphone interface 170D, and the application processor. Such as music playback, recording, etc.

The audio module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signal. The audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be set in the processor 110 , or some functional modules of the audio module 170 may be set in the processor 110 .

Speaker 170A, also referred to as a "horn", is used to convert audio electrical signals into sound signals. Electronic device 100 can listen to music through speaker 170A, or listen to hands-free calls.

Receiver 170B, also called "earpiece", is used to convert audio electrical signals into sound signals. When the electronic device 100 receives a call or a voice message, the receiver 170B can be placed close to the human ear to receive the voice.

The microphone 170C, also called "microphone" or "microphone", is used to convert sound signals into electrical signals. When making a phone call or sending a voice message, the user can put his mouth close to the microphone 170C to make a sound, and input the sound signal to the microphone 170C. The electronic device 100 may be provided with at least one microphone 170C. In some other embodiments, the electronic device 100 may be provided with two microphones 170C, which may also implement a noise reduction function in addition to collecting sound signals. In some other embodiments, the electronic device 100 can also be provided with three, four or more microphones 170C to collect sound signals, reduce noise, identify sound sources, and realize directional recording functions, etc.

The earphone interface 170D is used for connecting wired earphones. The earphone interface 170D can be a USB interface 130, or a 3.5mm open mobile terminal platform (OMTP) standard interface, or a cellular telecommunications industry association of the USA (CTIA) standard interface.

The pressure sensor 180A is used to sense the pressure signal and convert the pressure signal into an electrical signal.

The gyro sensor 180B can be used to determine the motion posture of the electronic device 100 .

The air pressure sensor 180C is used to measure air pressure.

The magnetic sensor 180D includes a Hall sensor.

The acceleration sensor 180E can detect the acceleration of the electronic device 100 in various directions (generally three axes).

The distance sensor 180F is used to measure the distance.

Proximity light sensor 180G may include, for example, light emitting diodes (LEDs) and light detectors, such as photodiodes. The light emitting diodes may be infrared light emitting diodes.

The ambient light sensor 180L is used for sensing ambient light brightness.

The fingerprint sensor 180H is used to collect fingerprints.

The temperature sensor 180J is used to detect temperature.

Touch sensor 180K, also known as "touch panel".

The keys 190 include a power key, a volume key and the like.

The motor 191 can generate a vibrating reminder.

The indicator 192 can be an indicator light, and can be used to indicate charging status, power change, and can also be used to indicate messages, missed calls, notifications, and the like.

FIG. 20 is a block diagram of the software structure of the electronic device 100 according to the embodiment of the present application.

The layered architecture divides the software into several layers, and each layer has a clear role and division of labor. Layers communicate through software interfaces. In some embodiments, the system is divided into four layers, which are application program layer, application program framework layer, runtime (Runtime) and system library, and kernel layer from top to bottom.

The application layer can consist of a series of application packages.

As shown in FIG. 20, the application package may include application programs (also called applications) such as camera, gallery, calendar, call, map, navigation, WLAN, Bluetooth, music, video, and short message.

The application framework layer provides an application programming interface (application programming interface, API) and a programming framework for applications in the application layer. The application framework layer includes some predefined functions.

As shown in Figure 20, the application framework layer can include window manager, content provider, view system, phone manager, resource manager, notification manager, etc.

A window manager is used to manage window programs. The window manager can get the size of the display screen, determine whether there is a status bar, lock the screen, capture the screen, etc.

Content providers are used to store and retrieve data and make it accessible to applications. Said data may include video, images, audio, calls made and received, browsing history and bookmarks, phonebook, etc.

The view system includes visual controls, such as controls for displaying text, controls for displaying pictures, and so on. The view system can be used to build applications. A display interface can consist of one or more views. For example, a display interface including a text message notification icon may include a view for displaying text and a view for displaying pictures.

The phone manager is used to provide communication functions of the electronic device 100 . For example, the management of call status (including connected, hung up, etc.).

The resource manager provides various resources for the application, such as localized strings, icons, pictures, layout files, video files, and so on.

The notification manager enables the application to display notification information in the status bar, which can be used to convey notification-type messages, and can automatically disappear after a short stay without user interaction. For example, the notification manager is used to notify the download completion, message reminder, etc. The notification manager can also be a notification that appears on the top status bar of the system in the form of a chart or scroll bar text, such as a notification of an application running in the background, or a notification that appears on the screen in the form of a dialog interface. For example, prompting text information in the status bar, issuing a prompt sound, vibrating the electronic device, and flashing the indicator light, etc.

Runtime (Runtime) includes the core library and virtual machine. Runtime is responsible for the scheduling and management of the system.

The core library includes two parts: one part is the function function that the programming language (for example, jave language) needs to call, and the other part is the core library of the system.

The application layer and the application framework layer run in virtual machines. The virtual machine executes programming files (for example, jave files) of the application program layer and the application program framework layer as binary files. The virtual machine is used to perform functions such as object life cycle management, stack management, thread management, security and exception management, and garbage collection.

A system library can include multiple function modules. For example: surface manager (surface manager), media library (Media Libraries), 3D graphics processing library (eg: OpenGL ES), 2D graphics engine (eg: SGL), etc.

The surface manager is used to manage the display subsystem, and provides fusion of two-dimensional (2-Dimensional, 2D) and three-dimensional (3-Dimensional, 3D) layers for multiple applications.

The media library supports playback and recording of various commonly used audio and video formats, as well as still image files, etc. The media library can support a variety of audio and video encoding formats, such as: MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, etc.

The 3D graphics processing library is used to implement 3D graphics drawing, image rendering, compositing, and layer processing, etc.

2D graphics engine is a drawing engine for 2D drawing.

The kernel layer is the layer between hardware and software. The kernel layer includes at least a display driver, a camera driver, an audio driver, a sensor driver, and a virtual card driver.

The workflow of the software and hardware of the electronic device 100 will be exemplarily described below in conjunction with capturing and photographing scenes.

When the touch sensor 180K receives a touch operation, a corresponding hardware interrupt is sent to the kernel layer. The kernel layer processes touch operations into original input events (including touch coordinates, time stamps of touch operations, and other information). Raw input events are stored at the kernel level. The application framework layer obtains the original input event from the kernel layer, and identifies the control corresponding to the input event. Take the touch operation as a touch click operation, and the control corresponding to the click operation is the control of the camera application icon as an example. The camera application calls the interface of the application framework layer to start the camera application, and then starts the camera driver by calling the kernel layer. Camera 193 captures still images or video.

In summary, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still The technical solutions described in the foregoing embodiments are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

As used in the above embodiments, depending on the context, the term "when" may be interpreted to mean "if" or "after" or "in response to determining..." or "in response to detecting...". Similarly, depending on the context, the phrase "in determining" or "if detected (a stated condition or event)" may be interpreted to mean "if determining..." or "in response to determining..." or "on detecting (a stated condition or event)" or "in response to detecting (a stated condition or event)".

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it 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 program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, optical fiber, DSL) or wireless (eg, 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 or a data center integrated with one or more available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, solid state hard disk), etc.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments are realized. The processes can be completed by computer programs to instruct related hardware. The programs can be stored in computer-readable storage media. When the programs are executed , may include the processes of the foregoing method embodiments. The aforementioned storage medium includes: ROM or random access memory RAM, magnetic disk or optical disk, and other various media that can store program codes.

Claims

A signal angle of arrival estimation method applied to electronic equipment, characterized in that the electronic equipment includes an antenna unit, the antenna unit includes a first antenna and a second antenna, and the antenna unit has a plurality of antenna pattern states, The methods include:

The electronic device controls the antenna unit to switch among the plurality of antenna pattern states; in each antenna pattern state, the electronic device receives the same arrival signal through the first antenna and the second antenna and calculating the phase difference between the first antenna and the second antenna, so as to obtain at least two phase differences corresponding to at least two antenna pattern states;

The electronic device determines the angle of arrival of the radio signal according to the at least two phase differences.
The method according to claim 1, wherein the electronic device controls the antenna unit to switch among the plurality of antenna pattern states; in each antenna pattern state, the electronic device passes through the The first antenna and the second antenna receive radio signals having the same angle of arrival and calculate the phase difference between the first antenna and the second antenna, so as to obtain at least two phases corresponding to at least two antenna pattern states Differences include:

In a first antenna pattern state of the plurality of antenna pattern states, the electronic device receives radio signals through the first antenna and the second antenna;

calculating, by the electronic device, a first phase difference between the first antenna and the second antenna in the pattern state of the first antenna;

The electronic device determines a first set of arrival angles according to the first phase difference, the first antenna pattern state, and a preset mapping relationship table, wherein the mapping relationship table includes multiple antenna pattern states different angles of arrival, and phase differences between the first antenna and the second antenna corresponding to the different angles of arrival of the radio signal;

If the first set of angles of arrival includes at least two angles of arrival, the electronic device switches the antenna unit from the first antenna pattern state to the second antenna pattern state among the plurality of antenna pattern states state, and receiving said radio signal by said first antenna and said second antenna in said second antenna pattern state;

The electronic device calculates a second phase difference between the first antenna and the second antenna in the second antenna pattern state.
The method according to claim 2, characterized in that,

The electronic device determining the angle of arrival of the radio signal according to the at least two phase differences includes: the electronic device determining the second phase difference according to the second phase difference, the second antenna pattern state, and the mapping relationship table. Two sets of angles of arrival;

The electronic device determines an angle of arrival of the radio signal based on the first set of angles of arrival and the second set of angles of arrival.
The method according to claim 3, wherein the electronic device determining the angle of arrival of the radio signal according to the first set of angles of arrival and the second set of angles of arrival comprises:

determining an intersection of the first set of angles of arrival and the second set of angles of arrival;

If the intersection includes an angle of arrival, then determine the angle of arrival as the angle of arrival of the radio signal.
The method according to claim 4, wherein if the intersection includes at least two angles of arrival, the method further comprises:

The electronic device switches the antenna unit from the second antenna pattern state to a third antenna pattern state among the plurality of antenna pattern states, and through the first antenna and the second antenna receiving said radio signal in said third antenna pattern state;

calculating, by the electronic device, a third phase difference between the first antenna and the second antenna in the pattern state of the three antennas;

The electronic device determines a third set of angles of arrival according to the third phase difference, the third antenna pattern state, and the mapping relationship table;

The angle of arrival of the radio signal is determined from the intersection and the third set of angles of arrival.
The method according to claim 1, wherein the electronic device controls the antenna unit to switch among the plurality of antenna pattern states; in each antenna pattern state, the electronic device passes through the The first antenna and the second antenna receive radio signals having the same angle of arrival and calculate the phase difference between the first antenna and the second antenna, so as to obtain at least two phases corresponding to at least two antenna pattern states Differences include:

The electronic device controls the antenna unit to sequentially switch between different antenna pattern states in at least two antenna pattern states; during the switching process, the electronic device passes through the first antenna pattern state in each antenna pattern state An antenna and the second antenna receive radio signals with the same angle of arrival and calculate the phase difference between the first antenna and the second antenna in each antenna pattern state, so as to obtain all antenna fields of the antenna unit A type state corresponds to at least two phase differences of the first antenna and the second antenna.
The method according to claim 6, characterized in that,

The electronic device determining the angle of arrival of the radio signal according to the at least two phase differences includes: according to the phase difference between the first antenna and the second antenna in each antenna pattern state and a preset mapping relationship The table determines the corresponding set of angles of arrival to obtain at least two sets of angles of arrival corresponding to the at least two antenna pattern states, the mapping relationship table includes different angles of arrival under multiple antenna pattern states, and the The phase difference between the first antenna and the second antenna corresponding to the different angles of arrival of the radio signal;

The angle of arrival of the radio signal is determined based on at least two of the sets of angles of arrival.
The method according to claim 1, wherein the electronic device controls the antenna unit to switch among the plurality of antenna pattern states; in each antenna pattern state, the electronic device passes through the The first antenna and the second antenna receive radio signals having the same angle of arrival and calculate the phase difference between the first antenna and the second antenna, so as to obtain at least two phases corresponding to at least two antenna pattern states Differences include:

In a first antenna pattern state of the plurality of antenna pattern states, the electronic device receives radio signals through the first antenna and the second antenna;

calculating, by the electronic device, a first phase difference between the first antenna and the second antenna in the pattern state of the first antenna;

The electronic device inputs the identification of the first antenna pattern state and the first phase difference into a preset angle-of-arrival calculation function, and if the angle-of-arrival calculation function outputs at least two angles of arrival, the electronic device will The antenna unit is switched from the first antenna pattern state to the second antenna pattern state among the plurality of antenna pattern states, and the second antenna pattern state is switched between the first antenna and the second antenna receiving the radio signal in an antenna pattern state;

The electronic device calculates a second phase difference between the first antenna and the second antenna in the second antenna pattern state.
The method according to claim 2 or 6 or 8, wherein the electronic device determining the angle of arrival of the radio signal according to the at least two phase differences comprises:

Inputting the at least two phase differences and the corresponding antenna pattern state into a preset angle-of-arrival calculation function to obtain the angle-of-arrival of the radio signal.
The method according to claim 1, wherein the first antenna has at least two first feed points, and the electronic device controlling the antenna unit to switch between the at least two antenna pattern states includes:

The electronic device controls switching of different feed points among at least two first feed points between the first antenna and the corresponding feed source, so as to realize switching of the antenna unit among the at least two antenna pattern states.
The method according to claim 1, wherein the first antenna has at least two first feed points, the second antenna includes at least two second feed points, and the electronic device controls the antenna unit Switching among the at least two antenna pattern states includes:

The electronic device controls switching of different feed points among at least two first feed points between the first antenna and the corresponding feed source and at least two second feed points between the second antenna and the corresponding feed source Switching between different feed points in the antenna unit, so as to realize the switching of the antenna unit among the at least two antenna pattern states.
The method according to claim 10, wherein two of the at least two first feed points are respectively located on opposite sides of the first antenna or in the at least two first feed points The two feed points are respectively located on adjacent two sides of the first antenna.
The method according to claim 11, characterized in that,

Two feed points of the at least two first feed points are respectively located on opposite sides of the first antenna, and two feed points of the at least two second feed points are respectively located on the sides of the second antenna opposite sides, or the two feed points of the at least two first feed points are respectively located on adjacent sides of the first antenna, and the two feed points of the at least two second feed points are respectively located Adjacent two sides of the second antenna.
The method according to claim 2, wherein the antenna unit further includes a third antenna, and the mapping relationship table further includes different arrival angles under a plurality of antenna pattern states, and different arrival angles of the radio signals The phase difference between the first antenna and the third antenna corresponding to the angle.
The method according to claim 14, characterized in that,

The electronic device receives radio signals through the first antenna and the second antenna, including:

The electronic device receives radio signals through the first antenna, the second antenna, and the third antenna; the electronic device calculates that the first antenna and the second antenna are in the field of the first antenna The first phase difference in the type state, including:

calculating, by the electronic device, a first phase difference between the first antenna and the second antenna in the pattern state of the first antenna;

calculating, by the electronic device, a third phase difference between the first antenna and the third antenna in the pattern state of the first antenna;

The electronic device determines a first angle-of-arrival set according to the first phase difference, the first antenna pattern state, and the mapping relationship table, including:

The electronic device determines a first angle-of-arrival subset according to the first phase difference, the first antenna pattern state, and the mapping relationship table;

The electronic device determines a second angle-of-arrival subset according to the third phase difference, the first antenna pattern state, and the mapping relationship table;

A first set of angles of arrival is determined according to the first subset of angles of arrival and the second subset of angles of arrival.
The method according to claim 15, wherein the first antenna has at least two first feed points, the second antenna has at least two second feed points, and the third antenna has at least two The third feed point, where the electronic device controls the antenna unit to switch between the at least two antenna pattern states, includes:

The electronic device controls the switching of different feed points among at least two first feed points between the first antenna and the corresponding feed source, and the switching between the at least two second feed points between the second antenna and the corresponding feed source. The switching of the feed point, the switching of different feed points among at least two third feed points between the third antenna and the corresponding feed source, so as to realize the switching of the antenna unit among the at least two antenna pattern states.
An electronic device, characterized in that it includes: two or more than two antennas, a display screen, one or more processors and one or more memories; the one or more processors and the two or more Two antennas, the one or more memories and the display screen are coupled, the one or more memories are used to store computer program codes, the computer program codes include computer instructions, and when the one or more processors execute the When the computer instruction is used, the electronic device is made to execute the method for estimating the signal angle of arrival according to any one of claims 1-16.
A computer-readable storage medium, characterized in that it includes computer instructions, and when the computer instructions are run on an electronic device, the electronic device executes the signal arrival angle according to any one of claims 1-16 Estimation method.
A computer program product, characterized in that, when the computer program product is run on an electronic device, the electronic device is made to execute the method for estimating a signal angle of arrival according to any one of claims 1-16.