Arrival angle measurement method, electronic equipment, readable storage medium and chip

Abstract

The invention provides an arrival angle measurement method, electronic equipment, a readable storage medium and a chip, and relates to the technical field of wireless positioning. The method is applied to the electronic equipment, and the electronic equipment comprises a first antenna and a second antenna. The antenna radiation field patterns of the first antenna and the second antenna are similar in a first angle range around the electronic equipment and are not similar in a second angle range around the electronic equipment. The method comprises the following steps: determining a difference value of target parameters measured by a first antenna and a second antenna according to a wireless signal; determining the arrival angle range of the wireless signal according to the difference value; wherein the arrival angle range is a first angle range or a second angle range; and measuring the arrival angle of the wireless signal by using the first antenna and the second antenna according to the arrival angle range. According to the technical scheme provided by the embodiment, the accuracy of arrival angle measurement can be improved.

Description

Technical Field

[0001] The present application relates to the field of wireless positioning technology, and in particular to an angle of arrival measurement method, electronic device, readable storage medium and chip. Background Art

[0002] Electronic devices can determine the direction of the signal source of the wireless signal relative to the electronic device based on the angle of arrival (AoA) of the wireless signal, thereby achieving device positioning. At present, electronic devices usually determine the angle of arrival of the wireless signal based on the phase difference of the wireless signals received by different antennas. However, for two wireless signals symmetrically incident from the front and back of the electronic device, that is, two wireless signals with angles of arrival of θ and -θ respectively, their phase difference is the same. Therefore, when the electronic device determines the angle of arrival of the wireless signal based on the phase difference, it is usually unable to distinguish whether the wireless signal comes from the front or back of the device, resulting in large errors in the measurement results. Summary of the invention

[0003] The present application provides an arrival angle measurement method, an electronic device, a readable storage medium and a chip, which are used to solve the problem of large arrival angle measurement errors in the prior art.

[0004] In order to achieve the above purpose, this application adopts the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides an arrival angle measurement method, which is applied to an electronic device, the electronic device comprising a first antenna and a second antenna; wherein the antenna radiation patterns of the first antenna and the second antenna are similar within a first angle range around the electronic device, and are dissimilar within a second angle range around the electronic device. The method comprises: determining a difference in a target parameter measured based on a wireless signal using the first antenna and the second antenna; determining an arrival angle range of the wireless signal based on the difference; wherein the arrival angle range is the first angle range or the second angle range described above; and measuring the arrival angle of the wireless signal using the first antenna and the second antenna based on the arrival angle range.

[0006] In this embodiment, the electronic device first identifies the arrival angle range of the wireless signal based on the difference in field patterns between the first antenna and the second antenna in different angle ranges and the measurement difference of the target parameters by the first antenna and the second antenna, and then performs arrival angle measurement within the arrival angle range, thereby improving the arrival angle measurement accuracy.

[0007] In some embodiments, the arrival angle range of the wireless signal is determined based on the difference, including: when the difference is less than or equal to a threshold, determining that the arrival angle range of the wireless signal is the first angle range; when the difference is greater than the threshold, determining that the arrival angle range of the wireless signal is the second angle range.

[0008] In some embodiments, the first angle range corresponds to the back of the electronic device, and the second angle range corresponds to the front of the electronic device; or, the first angle range corresponds to the front of the electronic device, and the second angle range corresponds to the back of the electronic device; wherein the front is the side that the screen of the electronic device faces, and the back is the side that the back cover of the electronic device faces; or, the front is the area that the top of the screen of the electronic device faces, and the back is the area that the bottom of the screen of the electronic device faces. Through this method, the electronic device can improve the accuracy of the angle of arrival measurement of the front and back of the electronic device.

[0009] In some embodiments, the target parameter is the distance between the source device and the electronic device, and the source device is used to transmit wireless signals; or, the target parameter is the power of the received wireless signal. It should be noted that the target parameter is a parameter affected by the antenna radiation pattern.

[0010] In some embodiments, determining a difference between a target parameter measured based on a wireless signal using a first antenna and a second antenna includes: using the first antenna to determine a first measurement result of the target parameter based on the wireless signal; using the second antenna to determine a second measurement result of the target parameter based on the wireless signal; and determining an absolute value of the difference between the first measurement result and the second measurement result as the difference between the target parameters measured by the first antenna and the second antenna.

[0011] This embodiment reflects the difference between the antenna radiation patterns of the first antenna and the second antenna on the wireless signal propagation path through the difference in the measurement of the target parameter by the first antenna and the second antenna, thereby determining the arrival angle range of the wireless signal.

[0012] In some embodiments, the second antenna is a co-body antenna, which includes a differential mode DM antenna and a common mode CM antenna; accordingly, determining the difference in target parameters measured by the first antenna and the second antenna based on the wireless signal includes: determining a first difference in the target parameters measured by the first antenna and the DM antenna based on the wireless signal; determining a second difference in the target parameters measured by the second antenna and the CM antenna based on the wireless signal; and determining, based on the first difference and the second difference, the difference in the target parameters measured using the first antenna and the second antenna.

[0013] In this embodiment, the electronic device determines the arrival angle range of the wireless signal based on the complementary characteristics of the antenna radiation patterns of the DM antenna and the CM antenna, according to the measurement difference of the target parameter between the first antenna and the DM antenna, and the measurement difference of the target parameter between the first antenna and the CM antenna, so as to improve the accuracy of the arrival angle range.

[0014] In some embodiments, the measurement difference of the target parameter by the first antenna and the second antenna is determined based on the first difference and the second difference, including: determining the maximum value of the first difference and the second difference as the difference of the target parameter measured by the first antenna and the second antenna based on the wireless signal; or determining the average value of the first difference and the second difference as the difference of the target parameter measured by the first antenna and the second antenna based on the wireless signal.

[0015] In some embodiments, the first antenna is a frame antenna and the second antenna is a patch antenna. The antenna radiator of the frame antenna is the metal frame of the mobile phone, which is easy to set as an omnidirectional antenna. The antenna radiator of the patch antenna is a metal patch, which is easy to set as a directional antenna. The antenna radiation field pattern between the omnidirectional antenna and the directional antenna is easy to meet the characteristics of being similar within the first angle range and dissimilar within the second angle range, thereby assisting in realizing the arrival angle measurement method provided in this embodiment.

[0016] In some embodiments, based on the arrival angle range, the arrival angle of the wireless signal is measured using a first antenna and a second antenna, including: during the rotation of the electronic device, within the arrival angle range, determining the correlation between the measured value of the phase difference of the wireless signal at multiple different moments and the true value of the phase difference at different arrival angles; fusing the correlations at the multiple different moments to obtain fused correlations; and determining the arrival angle of the wireless signal based on the fused correlations.

[0017] Through the method provided in the embodiment of the present application, the electronic device can further improve the accuracy of arrival angle measurement by rotating the mobile phone to assist in angle measurement.

[0018] In some embodiments, determining the angle of arrival of the wireless signal based on the fused correlation includes: determining the maximum value in the fused correlation; and determining the angle of arrival corresponding to the maximum value as the angle of arrival of the wireless signal.

[0019] In some embodiments, the sum of the first angle range and the second angle range covers 360° around the electronic device.

[0020] In a second aspect, an embodiment of the present application provides an electronic device, comprising a first antenna and a second antenna; the antenna radiation patterns of the first antenna and the second antenna are similar within a first angle range around the electronic device, and are dissimilar within a second angle range around the electronic device; the electronic device is configured to execute the method shown in the first aspect above.

[0021] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the method shown in the first aspect above.

[0022] In a fourth aspect, an embodiment of the present application provides a chip, comprising a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the method shown in the first aspect above is implemented.

[0023] In a fifth aspect, an embodiment of the present application provides a computer program product, in which a computer program is stored. When the computer program is executed by an electronic device, the electronic device can execute the method shown in the first aspect above.

[0024] It can be understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of an arrival angle measurement system provided in an embodiment of the present application;

[0026] Figure 2A is a schematic diagram of an arrival angle measurement posture provided by an embodiment of the present application;

[0027] Figure 2B It is a schematic diagram of the front and back of the measuring device provided in the embodiment of the present application;

[0028] Figure 3 is a schematic diagram of an arrival angle measurement posture provided by another embodiment of the present application;

[0029] Figure 4 is a schematic diagram of the angle of arrival provided in an embodiment of the present application;

[0030] Figure 5 is a schematic diagram of the angle of arrival measurement principle provided by an embodiment of the present application;

[0031] Figure 6 is a schematic diagram of a cosine function provided in an embodiment of the present application;

[0032] Fig. 7A is a schematic structural diagram of a measuring device applicable to an angle of arrival measurement method provided by an embodiment of the present application;

[0033] Figure 7B is a schematic structural diagram of a measuring device applicable to an angle of arrival measurement method provided in another embodiment of the present application;

[0034] Figure 8 is the antenna radiation pattern of the first antenna and the second antenna provided in the embodiment of the present application;

[0035] Fig. 9 is a three-dimensional antenna radiation pattern diagram of the first antenna and the second antenna provided in an embodiment of the present application;

[0036] Fig.10 is a schematic diagram of the distance measurement difference between the first antenna and the second antenna provided by an embodiment of the present application;

[0037] Fig.11 is a schematic flow chart of the arrival angle measurement method provided in an embodiment of the present application;

[0038] Fig.12 are the antenna radiation patterns of the DM antenna and the CM antenna provided in the embodiments of the present application;

[0039] Fig.13A It is a schematic diagram of the ranging difference between the first antenna and the DM / CM antenna provided in an embodiment of the present application;

[0040] Fig. 13B is a schematic diagram of the distance measurement difference after fusion processing provided in an embodiment of the present application;

[0041] Fig.14 is a flow chart for determining an angle of arrival range provided by an embodiment of the present application;

[0042] Fig.15 is a schematic diagram of the correlation of phase differences provided by an embodiment of the present application;

[0043] Fig.16 is a schematic diagram of a measurement process of an angle of arrival provided by an embodiment of the present application;

[0044] Fig.17 is a schematic diagram of the correlation of phase differences provided by an embodiment of the present application;

[0045] Fig.18 is a schematic diagram of an arrival angle measurement process provided by another embodiment of the present application;

[0046] Fig.19 is a schematic diagram of a display interface of a measuring device provided by an embodiment of the present application;

[0047] Fig. 20 is a schematic diagram of phase difference correlation provided by another embodiment of the present application;

[0048] Fig.21 is a schematic flow chart of an arrival angle measurement method provided in other embodiments of the present application;

[0049] Fig. 22 is a schematic diagram of a display interface of a measuring device provided in another embodiment of the present application;

[0050] Fig.23 is a schematic diagram of the correlation of phase differences provided by another embodiment of the present application;

[0051] Fig.24is a schematic diagram of a display interface of a measuring device provided by another embodiment of the present application;

[0052] Fig.25 is a schematic diagram of the angle of arrival measurement error provided in an embodiment of the present application;

[0053] Fig.26 It is a schematic diagram of the structure of the chip provided in the embodiment of the present application. DETAILED DESCRIPTION

[0054] It should be understood that in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is merely a way to describe the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0055] In this embodiment, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "plurality" means two or more.

[0056] The technical solution provided in the embodiments of the present application is described below with reference to the accompanying drawings.

[0057] The angle of arrival (AoA) is a key parameter in wireless positioning technology, which is used to indicate the angle between the direction of arrival of the wireless signal and the straight line where the angle of arrival measurement antenna (hereinafter referred to as the antenna) is located. Through the angle of arrival measurement technology, the electronic device can locate the source device that transmits the wireless signal, or reversely locate the electronic device based on the location information of the source device. The angle of arrival measurement technology has a wide range of applications in the field of wireless positioning technology.

[0058] Figure 1 Schematic diagram of the arrival angle measurement system provided in the embodiment of the present application. Figure 1 As shown, the arrival angle measurement system includes a measuring device and a source device, wherein the measuring device and the source device are connected via wireless communication technology.

[0059] In this embodiment, electronic devices such as the measuring device and the source device can be a mobile phone, a tablet computer (Pad), a smart home device with a wireless transceiver function (such as a smart TV, a smart speaker, a sweeping robot, a smart air conditioner, etc.), a computer with a wireless transceiver function, a smart TV, a projector, a wearable device (such as a smart watch), a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), a router, etc. The embodiment of the present application does not limit the specific types of the measuring device and the source device.

[0060] In addition, the wireless communication technology may be wireless fidelity (Wi-Fi), traditional Bluetooth (BT), low energy Bluetooth (BLE), ultra wide band (UWB) or radio frequency (RF) communication technology, and the embodiments of the present application are not limited to this.

[0061] The source device is used to transmit the wireless signal required for measurement during the arrival angle measurement process. The wireless signal can be a measurement frame, a beacon frame, etc. Optionally, the source device can transmit the wireless signal autonomously or according to the instruction of the measurement device. The wireless signal can be a WiFi signal, a Bluetooth signal, a UWB signal, or a FR signal, etc., which is not limited in the embodiments of the present application.

[0062] A measuring device is used to receive a wireless signal transmitted by a source device through at least two antennas, and determine the angle of arrival of the wireless signal according to the phase difference Δφ of the wireless signal received by the at least two antennas. Exemplarily, the measuring device can use an angle of arrival calculation formula to calculate the angle of arrival of the wireless signal, or can determine the angle of arrival of the wireless signal according to a mapping relationship between the phase difference and the angle of arrival, which is not limited in this embodiment.

[0063] It should be noted that the antenna in this embodiment refers to an antenna for angle of arrival measurement. It should be understood that, although not shown in this embodiment, the measuring device may include other antennas in addition to the above-mentioned antenna for angle of arrival measurement, such as an antenna for receiving satellite positioning signals, an antenna for receiving cellular signals, etc. In addition, the embodiment of the present application does not limit the working frequency band of the antenna, for example, it can be a 2.4GHz / 5GHz Wi-Fi band, a 2.4GHz Bluetooth band, or a 3.1~10.6GHz UWB band, a 5GHz new radio (NR) band, etc.

[0064] During the arrival angle measurement process, the measuring device usually needs to maintain a preset posture, which is exemplified below.

[0065] Figure 2A FIG. 1 is a schematic diagram of an arrival angle measurement posture provided by an embodiment of the present application. Figure 2A As shown, during the arrival angle measurement process, on the one hand, the measuring device is kept basically vertical, that is, the screen of the measuring device is basically perpendicular to the horizontal plane; the straight line where the antenna 1 and the antenna 2 used for arrival angle measurement in the measuring device are located is basically kept horizontal. Based on this, the antenna 1 and the antenna 2 can measure the arrival angle of the wireless signal from the front of the measuring device, and can also measure the arrival angle of the wireless signal from the back of the measuring device.

[0066] It should be noted that in this arrival angle measurement attitude, see Figure 2B As shown, the front of the measuring device refers to the direction in which the display screen of the measuring device faces, and the display screen displays images related to the angle of arrival measurement, such as an arrow indicating the direction of the incoming wave, and information such as the distance between the source device and the measuring device. The back of the measuring device refers to the side in which the back cover (back rear) of the measuring device faces, and the back of the measuring device is arranged opposite to the front. It can be understood that during the angle of arrival measurement process, the front of the measuring device usually faces the user, and the back of the measuring device usually faces away from the user.

[0067] Figure 3 is a schematic diagram of an arrival angle measurement posture provided by another embodiment of the present application. Figure 3 As shown, during the angle of arrival measurement process, the measuring device is kept basically horizontal, that is, the screen of the measuring device is basically parallel to the horizontal plane; in addition, the straight line where the antenna 1 and the antenna 2 used for angle of arrival measurement in the measuring device are located is also kept basically horizontal. Based on this, the antenna 1 and the antenna 2 can measure the angle of arrival of the wireless signal from the front of the measuring device, and can also measure the angle of arrival of the wireless signal from the back of the measuring device.

[0068] It should be noted that in this arrival angle measurement attitude, see Figure 3As shown in the figure, the front side of the measuring device refers to the area to which the top of the measuring device screen faces; the back side of the measuring device refers to the area to which the bottom of the measuring device screen faces.

[0069] For ease of description, see Figure 4 As shown, in this embodiment, θ is used to represent the angle of arrival of the wireless signal from the back of the measuring device, and -θ is used to represent the angle of arrival of the wireless signal from the front of the measuring device. In other words, the angle of arrival of the wireless signal from the back of the measuring device is a positive value, and the angle of arrival of the wireless signal from the front of the wireless signal is a negative value. Exemplarily, the angle range corresponding to the front of the measuring device is -180° to 0°, and the angle range corresponding to the back of the measuring device is 0° to 180°. Of course, the angle range corresponding to the front and back of the measuring device can also be other values, and this embodiment does not limit this.

[0070] Figure 5 FIG. 1 is a schematic diagram of the angle of arrival measurement principle provided by an embodiment of the present application. Figure 5 As shown, taking the measurement device using antenna 1 and antenna 2 to measure the arrival angle of the wireless signal as an example, the measurement device can determine the arrival angle of the wireless signal according to the following formula (1).

[0071]

[0072] In formula (1), φ ant1 is the phase of the wireless signal received by antenna 1, φ ant2 is the phase of the wireless signal received by antenna 2, φ ant1 -φ ant2 is the phase difference between the wireless signals received by antenna 1 and antenna 2. d is the distance between antenna 1 and antenna 2, which is usually known. AOA is the arrival angle to be measured. λ is the wavelength of the wireless signal, which is usually known.

[0073] It can be understood that in the process of measuring the angle of arrival, the measuring device measures φ ant1 and φ ant2 Afterwards, φ ant1 and φ ant2 Substituting into formula (1) we can get the arrival angle θ of the wireless signal AoA .

[0074] However, see Figure 6 The cosine function f(θ AoA )=cosθ AoA It can be seen that cosθ AoA In the range of -180°~0° and 0°~180°, about θ AoA =0° symmetry, i.e. cosθ=cos(-θ). Therefore, by ant1 -φant2 Substituting into formula (1) to determine the arrival angle, it may be θ or -θ. In other words, it is impossible to distinguish whether the wireless signal is incident from the front or the back of the measuring device through the above, and the measurement result may have a large error.

[0075] To this end, an embodiment of the present application provides an arrival angle measurement method, which utilizes the difference in antenna radiation field patterns on the front and back of the measuring device to distinguish the direction of the wireless signal, thereby improving the accuracy of the arrival angle measurement.

[0076] Figure 7A to Figure 7B 1 is a schematic diagram of a structure of a measuring device applicable to the angle of arrival measurement method provided in an embodiment of the present application. As shown in the figure, the measuring device includes an angle of arrival measurement module, a first antenna and a second antenna.

[0077] The arrival angle measurement module connects the first antenna and the second antenna, and uses the first antenna and the second antenna to measure the arrival angle of the wireless signal. The specific measurement process is described below. In this embodiment, the arrival angle measurement module can be a UWB module, a Wi-Fi module, a BT module, or an RF module, etc., and this embodiment does not limit this.

[0078] The first antenna is an omnidirectional antenna, and its antenna radiation pattern on the front and back of the measuring device is substantially the same. Exemplarily, the first antenna may be a frame antenna, and this embodiment does not limit the type of the first antenna.

[0079] For example, when the first antenna is a frame antenna, see Fig. 7A or Figure 7B As shown, the first antenna includes an antenna radiator, a grounding point G, and a first feed point F1. The antenna radiator is used to transmit / receive wireless signals, and is a part of the metal frame of the measuring device, located between two insulating breakpoints on the metal frame. The antenna radiator is connected to the grounding point G through a grounding line, and the grounding point G is connected to the grounding surface of the printed circuit board (PCB) of the measuring device. In addition, the antenna radiator is also connected to the first feed point F1 through a feeding line, and the first feed point F1 is connected to the arrival angle measurement module, and the RF source device feeds the antenna radiator through the first feed point F1.

[0080] The second antenna is a directional antenna, and its antenna radiation pattern on the front and back of the measuring device is greatly different. Exemplarily, the second antenna can be a single patch antenna, a shared patch antenna, etc., and this embodiment does not limit the type of the second antenna.

[0081] For example, when the second antenna is a single-piece patch antenna, see Fig. 7AAs shown, the second antenna includes an antenna radiator and a second feed point F2. The antenna radiator is used to transmit / receive wireless signals and is a rectangular metal patch structure, which is arranged on the side of the back cover of the measuring device facing the screen. The antenna radiator is connected to the second feed point F2 through a feeding line, and the second feed point F2 is connected to the arrival angle measurement module. The RF source device feeds the antenna radiator through the second feed point F2.

[0082] Alternatively, when the second antenna is a coplanar patch antenna, see Figure 7B As shown, the second antenna includes an antenna radiator, a second feed point F2, a third feed point F3 and a switching switch. The antenna radiator is a rectangular metal patch, which is arranged on the side of the back cover of the measuring device facing the screen. The width of the metal patch is about 0.35λ and the length is about 0.4λ, where λ is the wavelength of the wireless signal to be measured. The middle position of one end of the antenna radiator is connected to the second feed point F2 through a feeding line to form a differential mode (DM) antenna. The maximum current region of the antenna radiator is connected to the third feed point F3 to form a common mode (CM) antenna. The second feed point F2 and the third feed point F3 are connected to the angle of arrival measurement module through a switching switch.

[0083] It can be understood that in the shared antenna, the arrival angle measurement module can control whether the second antenna actually used is a DM antenna or a CM antenna by switching the switch. In addition, although the DM antenna and the CM antenna share an antenna radiator, their isolation is greater than the threshold and the influence between the two is small, so they can work normally.

[0084] It should be noted that in the above-mentioned frame antenna, single-body patch antenna and shared-body patch antenna, the ground circuit, feed circuit and other circuits may include one or more other electronic components such as capacitors, inductors, resistors, etc. in addition to the energized wires. This embodiment does not limit the specific structure of the above-mentioned circuits.

[0085] Although the above description shows the differences between the first antenna and the second antenna in terms of shape, structure, etc., the key difference between the two lies in the antenna radiation pattern. The antenna radiation patterns of the first antenna and the second antenna are described in detail below.

[0086] In this embodiment, the antenna radiation pattern is used to describe the corresponding relationship between the energy radiated by the antenna and each position in space. The antenna radiation pattern is usually a three-dimensional structure centered on the antenna. It can be understood that for an ideal point source antenna, the energy radiated by it is the same in all directions and is uniformly attenuated at the same amplitude. Therefore, its antenna radiation pattern is close to a spherical shape. However, in actual applications, due to the shape and size of the antenna radiator, obstacles (such as device housings, components inside the device) and other factors, the energy radiated by the antenna in all directions may be the same in size and attenuation amplitude, or may be different. Therefore, the antenna radiation pattern in actual applications is usually irregular in shape.

[0087] It is worth noting that, in this embodiment, the antenna radiation patterns of the first antenna and the second antenna must satisfy the following pattern state 1 or pattern state 2.

[0088] Field pattern state 1: the antenna radiation patterns of the first antenna and the second antenna on the back of the measuring device are basically the same, while the antenna radiation patterns on the front of the measuring device are quite different.

[0089] Field pattern state 2: the antenna radiation patterns of the first antenna and the second antenna on the front side of the measuring device are basically the same, while the antenna radiation patterns on the back side of the measuring device are quite different.

[0090] Among them, the antenna radiation patterns of the first antenna and the second antenna being substantially the same can be understood as: the antenna radiation patterns of the first antenna and the second antenna being similar; or, in most areas (for example, areas above 70% or 80%), the energy radiated by the first antenna and the second antenna in the same direction and the attenuation conditions are substantially the same, that is, the difference in energy at the same position is less than a threshold.

[0091] In addition, the large difference in antenna radiation patterns between the first antenna and the second antenna can be understood as: the antenna radiation patterns of the first antenna and the second antenna are not similar; or, in other words, in most areas (for example, in areas above 70% or 80%), the energy and / or attenuation radiated by the first antenna and the second antenna in the same direction are very different, that is, the difference in energy at the same position is greater than a threshold.

[0092] The following takes field state 1 as an example, respectively combined with Figure 8 and Fig. 9 The antenna radiation patterns of the first antenna and the second antenna are described.

[0093] Figure 8 is the antenna radiation pattern of the first antenna and the second antenna provided in the embodiment of the present application. The antenna radiation pattern is used to represent the distribution of the energy radiated by the antenna with the angular coordinate at a fixed distance. Specifically, in the case of Figure 8In the polar coordinate system shown, the polar diameter is used to indicate the energy radiated by the antenna, and its unit is dBi (decibel gain); the polar angle is used to indicate the orientation relative to the measuring device, which includes -180° to 180°; the closed curve in the figure is used to indicate the energy at different orientations at a preset distance (such as 1m) from the antenna, and shows how the energy radiated by the antenna at this distance changes with orientation. In addition, taking the illustrated direction as an example, the left side of the plane where the measuring device is located is the front of the measuring device, and the right side of the plane where the measuring device is located is the back of the measuring device.

[0094] Regarding the first antenna, according to Figure 8 As can be seen from (a) in FIG. 1 , at a distance of 1 m from the measuring device, the antenna radiation patterns of the first antenna on the front and back sides of the measuring device are substantially symmetrical about the plane where the measuring device is located.

[0095] Take A1 and A2 as an example, where A1 is a point 1m away from the first antenna in the -40° direction, and A2 is a point 1m away from the first antenna in the 40° direction. A1 and A2 are symmetrical about the plane where the measuring device is located. Figure 8 It can be seen from (a) that the energy at the position corresponding to A1 is approximately -2dBi, and the energy at the position corresponding to A2 is approximately 0dBi. The difference between the two, 2dBi, is less than the energy threshold (eg, 3dBi), and the energies at A1 and A2 are substantially the same.

[0096] Take B1 and B2 as an example, where B1 is a point 1m away from the first antenna in the -60° direction, and B2 is a point 1m away from the first antenna in the 60° direction. B1 and B2 are symmetrical about the plane where the measuring device is located. Figure 8 It can be seen from (a) that the energy at the position corresponding to B1 is approximately 0dBi, and the energy at the position corresponding to B2 is also approximately 0dBi. The difference between the two, 0dBi, is less than the energy threshold of 3dBi, and the energies at B1 and B2 are basically the same.

[0097] Regarding the second antenna, according to Figure 8 As can be seen from (b) in the figure, at a distance of 1m from the measuring device, the antenna radiation pattern of the second antenna on the front and back of the measuring device is quite different. The energy radiated by the second antenna to the front of the measuring device is weaker, and the energy radiated to the back of the measuring device is stronger.

[0098] Take C1 and C2 as an example, where C1 is a point 1m away from the second antenna in the -40° direction, and C2 is a point 1m away from the second antenna in the 40° direction. C1 and C2 are symmetrical about the plane where the measuring device is located. Figure 8As can be seen from (b), the energy at the position corresponding to C1 is approximately -11dBi, and the energy at the position corresponding to C2 is approximately -7dBi. The difference between the two, 4dBi, is greater than the energy threshold of 3dBi. The energy difference between C1 and C2 is large.

[0099] Take D1 and D2 as an example, where D1 is a point 1m away from the second antenna in the -60° direction, and D2 is a point 1m away from the second antenna in the 60° direction. D1 and D2 are symmetrical about the plane where the measuring device is located. Figure 8 As can be seen from (b), the energy at the position corresponding to D1 is about -13dBi, and the energy at the position corresponding to C2 is about 4dBi. The difference between the two is as high as 17dBi, which is much larger than the energy threshold of 3dBi. The energy at D1 and D2 is also quite different.

[0100] In addition, comprehensive comparison Figure 8 It can be seen from (a) and (b) that, on the back side of the measuring device, the antenna radiation patterns of the first antenna and the second antenna are substantially the same; whereas, on the front side of the measuring device, the antenna radiation patterns of the first antenna and the second antenna are quite different.

[0101] Fig. 9 It is a three-dimensional antenna radiation pattern diagram of the first antenna and the second antenna provided in the embodiment of the present application. The darker the color of each pixel in the figure, the stronger the energy at the corresponding position of the pixel. In addition, taking the illustrated direction as an example, the left side of the plane where the measuring device is located is the front side of the measuring device, and the right side of the plane where the measuring device is located is the back side of the measuring device.

[0102] Regarding the first antenna, according to Fig. 9 As can be seen from (a) in the figure, the antenna radiation patterns of the first antenna on the front and back of the measuring device are substantially symmetrical about the plane where the measuring device is located, that is, the distribution of energy radiated by the first antenna to the front and back of the measuring device is substantially the same.

[0103] Regarding the second antenna, according to Fig. 9 As can be seen from (b) in the figure, the antenna radiation pattern of the second antenna on the front and back of the measuring device is quite different. The energy radiated by the second antenna to the front of the measuring device is weaker, and the energy radiated to the back of the measuring device is stronger.

[0104] In addition, comprehensive comparison Fig. 9 It can also be seen from (a) and (b) that, on the back of the measuring device, the antenna radiation patterns of the first antenna and the second antenna are basically the same; while on the front of the measuring device, the antenna radiation patterns of the first antenna and the second antenna are quite different.

[0105] Generally speaking, the greater the energy radiated by the antenna to the surrounding space, the better the antenna receives the wireless signal. Therefore, the antenna radiation pattern will affect some parameters related to the wireless signal. Exemplarily, the parameter can be the power of the received wireless signal, the distance between the source device transmitting the wireless signal and the measuring device, etc. And generally speaking, the greater the energy radiated by the antenna to the surrounding space, the more accurate the measurement results of the measuring device for the above parameters such as power and distance.

[0106] Based on this, it can be understood that, on the propagation path of the wireless signal, when the antenna radiation patterns of the first antenna and the second antenna of the measuring device are similar, the measurement results of the first antenna and the second antenna for the above parameters such as power and distance are closer. When the antenna radiation patterns of the first antenna and the second antenna are significantly different, the measurement results of the first antenna and the second antenna for the above parameters such as power and distance are more different.

[0107] The following takes the distance measurement difference (ie, ranging difference) between the first antenna and the second antenna in pattern state 1 as an example to illustrate the influence of the difference in antenna radiation patterns on some parameters.

[0108] Fig.10 An embodiment of the present application provides a schematic diagram of the ranging difference between the first antenna and the second antenna. In the figure, the horizontal axis is the ground truth of the arrival angle, and the vertical axis is the ranging difference ΔD between the first antenna and the second antenna in the field state 1, where ΔD = |D1-D2|, D1 is the distance between the source device and the measuring device measured by the measuring device using the first antenna, and D2 is the distance between the source device and the measuring device measured by the measuring device using the second antenna.

[0109] pass Fig.10 It can be seen that on the front of the measuring device, due to the large difference in the antenna radiation pattern of the first antenna and the second antenna, the ranging difference ΔD between the first antenna and the second antenna is large in most of the front range. For example, within the arrival angle range of -170° to -10°, ΔD is basically between 0.1m and 0.6m. On the back of the measuring device, due to the basically identical antenna radiation pattern of the first antenna and the second antenna, the ranging difference between the first antenna and the second antenna is small in most of the back range, and is basically less than 0.1m at each arrival angle.

[0110] Therefore, the measuring device can determine whether the wireless signal comes from the front or back of the measuring device according to whether the distance difference ΔD between the first antenna and the second antenna is greater than a distance threshold (such as 0.1m, 0.15m, etc.). Fig.10The measuring device with the distance measurement characteristics shown in the figure has an effective recognition range that can cover -170° to -10° and 10° to 170°, and has a large measurement range. Therefore, when the distance measurement difference ΔD between the first antenna and the second antenna is greater than or equal to the distance threshold, it is determined that the wireless signal comes from the front of the measuring device; and when the distance measurement difference ΔD between the first antenna and the second antenna is less than the distance threshold, it is determined that the wireless signal comes from the back of the measuring device.

[0111] It should be noted that, under the condition that the antenna radiation pattern of the measuring device satisfies pattern state 2, that is, the antenna radiation patterns of the first antenna and the second antenna on the back of the measuring device are basically the same, while the antenna radiation patterns on the front of the measuring device are quite different, when the ranging difference ΔD between the first antenna and the second antenna is greater than or equal to the distance threshold, it is determined that the wireless signal comes from the back of the measuring device; and when the ranging difference ΔD between the first antenna and the second antenna is less than the distance threshold, it is determined that the wireless signal comes from the front of the measuring device.

[0112] Similarly, since the antenna radiation pattern will also affect the measured power W of the wireless signal, the power of the wireless signal measured by the first antenna and the second antenna is also different for the same wireless signal. Therefore, the measuring device can also determine the area where the wireless signal comes from based on the power difference ΔW of the wireless signal = |W1-W2|. Among them, W1 is the power of the wireless signal measured by the measuring device using the first antenna, and D2 is the power of the wireless signal measured by the measuring device using the second antenna.

[0113] Exemplarily, under the condition that the measuring device satisfies field type state 1, when the power difference ΔW between the first antenna and the second antenna is greater than or equal to the power threshold, it is determined that the wireless signal comes from the front of the measuring device; and when the power difference ΔW between the first antenna and the second antenna is less than the power threshold, it is determined that the wireless signal comes from the back of the measuring device.

[0114] Alternatively, under the condition that the measuring device satisfies field type state 2, when the power difference ΔW between the first antenna and the second antenna is greater than or equal to the distance threshold, it is determined that the wireless signal comes from the back of the measuring device; and when the power difference ΔW between the first antenna and the second antenna is less than the distance threshold, it is determined that the wireless signal comes from the front of the measuring device.

[0115] It can be understood that since different areas around the measuring device correspond to different angle ranges, for example, the front of the measuring device corresponds to the first angle range (such as -180° to 0°), and the back corresponds to the second angle range (such as 0° to 180°); or, the back of the measuring device corresponds to the first angle range, and the front corresponds to the second angle range, this embodiment does not limit this. Therefore, the measuring device can identify the area from which the wireless signal comes, in other words, the measuring device can identify the arrival angle range of the wireless signal. Based on this, the measuring device can filter out the arrival angle that does not belong to the arrival angle range during the arrival angle measurement process, thereby improving the measurement accuracy of the arrival angle.

[0116] The arrival angle measurement process provided in the embodiment of the present application is described in detail below.

[0117] Fig.11 is a schematic flow chart of the arrival angle measurement method provided in the embodiment of the present application. Fig.11 As shown, the method specifically includes the following steps S1101 to S1103.

[0118] S1101: A measuring device determines a difference in a target parameter measured according to a wireless signal using a first antenna and a second antenna.

[0119] In this embodiment, the target parameter is a parameter affected by the antenna radiation pattern, such as the distance between the measuring device and the source device, the power of the wireless signal received by the measuring device, etc.

[0120] Exemplarily, in S1101, the measuring device determines the difference between the target parameter measured by the first antenna and the second antenna according to the wireless signal, specifically including: the measuring device uses the first antenna to determine the first measurement result of the target parameter according to the wireless signal; at the same time, the measuring device uses the second antenna to determine the second measurement result of the target parameter according to the wireless signal. The absolute value of the difference between the first measurement result and the second measurement result is determined as the difference between the target parameter measured by the first antenna and the second antenna.

[0121] S1102: The measuring device determines the arrival angle range of the wireless signal according to the difference.

[0122] Based on the previous description, since the target parameter is affected by the antenna radiation pattern on the propagation path, the difference in the field pattern of the first antenna and the second antenna on the propagation path of the wireless signal can be determined based on the size of the difference between the first measurement result and the second measurement result of the target parameter, and then it can be determined whether the wireless signal comes from the front or back of the measuring device, that is, the arrival angle range of the wireless signal.

[0123] For example, when the absolute value of the difference between the first measurement result and the second measurement result is greater than or equal to a threshold value, it is determined that the wireless signal comes from a first angle range. Within the first angle range, the antenna radiation patterns of the first antenna and the second antenna are quite different. It should be noted that, depending on the antenna setting of the measuring device, the first angle range may be the back side of the measuring device or the front side of the measuring device.

[0124] Alternatively, when the absolute value of the difference between the first measurement result and the second measurement result is less than a threshold value, it is determined that the wireless signal comes from a second angle range. The first angle range and the second angle range are different, and within the second angle range, the antenna radiation patterns of the first antenna and the second antenna are substantially the same. Similarly, depending on the antenna setting of the measuring device, the second angle range may be the front side of the measuring device or the back side of the measuring device.

[0125] S1103: The measuring device determines the angle of arrival of the wireless signal using the first antenna and the second antenna based on the angle of arrival range of the wireless signal.

[0126] It can be understood that after determining the arrival angle range, the measuring device can further determine the arrival angle of the wireless signal within the arrival angle range, thereby improving the accuracy of the arrival angle measurement.

[0127] To summarize, through the method provided in the embodiment of the present application, the measuring device identifies whether the wireless signal comes from the front or the back based on the influence of the difference in field patterns of the first antenna and the second antenna on the front and back sides on measurement parameters such as distance and power, and according to the parameter difference measured using the first antenna and the second antenna, thereby realizing detection of wireless signals within a 360° range and improving the arrival angle measurement accuracy of the measuring device.

[0128] Taking the measurement device satisfying field state 1 as an example, the following specifically describes two aspects involved in the embodiments of the present application, namely (1) determining the arrival angle range of the wireless signal, and (2) determining the arrival angle of the wireless signal based on the arrival angle range of the wireless signal.

[0129] (I) Determine the arrival angle range of wireless signals

[0130] For antennas of different forms, the measuring device can use different methods to determine the arrival angle range of the wireless signal. The following uses the example that the measuring device includes a first angle range (such as -180° to 0°) and a second angle range (such as 0° to 180°), and the first arrival angle range corresponds to the front of the measuring device, and the second angle range corresponds to the back of the measuring device, as an example, and describes the process of determining the arrival angle range of the wireless signal in combination with different examples.

[0131] Example 1: The first antenna is a single frame antenna, and the second antenna is a single patch antenna.

[0132] See also Fig. 7A As shown, the first antenna of the measuring device is a single frame antenna, and the second antenna is a single patch antenna. The single frame antenna and the single patch antenna usually have only one antenna radiation pattern each. Therefore, for a certain wireless signal, the difference between the target parameters measured by the first antenna and the second antenna is certain. Based on the difference and the field pattern state satisfied by the measuring device, the measuring device can determine the arrival angle range of the wireless signal.

[0133] For example, when the measuring device satisfies the field state 1, when the difference between the target parameters measured by the first antenna and the second antenna is less than the threshold, it means that when the wireless signal propagates to the first antenna and the second antenna, the antenna radiation field patterns on the propagation path are basically the same. Therefore, it is determined that the wireless signal comes from the back of the measuring device, that is, the arrival angle range of the wireless signal is the second angle range of 0 to 180°. When the difference between the target parameters measured by the first antenna and the second antenna is greater than or equal to the threshold, it means that when the wireless signal propagates to the first antenna and the second antenna, the antenna radiation field patterns on the propagation path are quite different. Therefore, it is determined that the wireless signal comes from the front of the measuring device, that is, the arrival angle range of the wireless signal is the first angle range of -180° to 0°.

[0134] Example 2: The first antenna is a single-body frame antenna, and the second antenna is a co-body patch antenna.

[0135] See also Figure 7B As shown, the first antenna of the measuring device is a single frame antenna, and the second antenna is a co-body patch antenna. Among them, the single frame antenna usually has only one antenna radiation pattern. However, the co-body patch antenna actually includes two antennas, which are a DM antenna and a CM antenna, and the antenna radiation patterns of the DM antenna and the CM antenna are different. In other words, the second antenna actually has two different antenna radiation patterns.

[0136] Fig.12 : is the antenna radiation pattern of the DM antenna and the CM antenna provided in the embodiment of the present application. Fig.12 It can be seen that the antenna radiation patterns of the DM antenna and the CM antenna on the front of the measurement device are basically the same, but there are significant differences in the antenna radiation patterns on the back of the measurement device. In addition, on the back of the measurement device, the antenna radiation patterns of the DM antenna and the CM antenna can complement each other. For example, see Fig.12 As shown in (a) and (b) of FIG. 1 , the energy radiated by the DM antenna is less than that radiated by the CM antenna in the range of 0° to 40° and 150° to 180° on the back of the measurement device. However, in the range of 40° to 150° on the back of the measurement device, the energy radiated by the DM antenna is greater than that radiated by the CM antenna.

[0137] When there are differences in the antenna radiation patterns of the DM antenna and the CM antenna, there are also certain differences in determining the measurement parameters such as distance and power between the DM antenna and the first antenna. The details are as follows.

[0138] Fig.13A It is a schematic diagram of the ranging difference between the first antenna and the DM / CM antenna provided in this embodiment. Curve 1 in the figure shows the ranging difference between the first antenna and the DM antenna, and curve 2 shows the ranging difference between the first antenna and the CM antenna. It can be seen from the figure that within the effective measurement range of -160° to -20°, the ranging difference between the first antenna and the DM antenna is less than the threshold at -130° to -120° and -100° to -90°, and cannot accurately reflect the field pattern difference between the first antenna and the DM antenna; while within the remaining angle range, it is greater than or equal to the distance threshold, which can accurately reflect the field pattern difference between the first antenna and the DM antenna. In addition, within the effective measurement range of -160° to -20°, the ranging difference between the first antenna and the CM antenna is less than the threshold near -120° to -110° and -85° to -75°, and cannot accurately reflect the difference in field pattern between the first antenna and the CM antenna, while it is greater than or equal to the distance threshold in the remaining angle range, and can accurately reflect the difference in field pattern between the first antenna and the CM antenna. It can be seen that the angle range in which the ranging difference between the DM antenna and the CM antenna cannot reflect the difference in field pattern is different. Therefore, the measurement equipment can use the DM antenna and the CM antenna in combination to identify the difference in radiation field pattern between the second antenna and the second antenna, and then determine the arrival angle range of the wireless signal.

[0139] In a possible implementation, for the target parameter, the measuring device can use the DM antenna and the first antenna to measure a difference, use the CM antenna combined with the first antenna to measure another difference, and use the complementary characteristics of the DM antenna and the CM antenna field patterns to jointly determine the arrival angle range of the wireless signal based on the two differences, thereby improving the accuracy of the arrival angle range.

[0140] Taking the target parameter as the distance between the measuring device and the source device as an example, the measuring device can calculate the distance difference ΔD between the first antenna and the DM antenna. DM , and the distance difference ΔD between the first antenna and the CM antenna CM The fusion process is performed to obtain ΔD, so that the ΔD can accurately reflect the difference in field patterns between the first antenna and the second antenna.

[0141] In this embodiment, ΔD DM and ΔD CM The fusion process includes: converting ΔD under the same arrival angle DM and ΔD CM Add together to get ΔD at the arrival angle, that is, the ranging difference ΔD = ΔD DM +ΔD CMAlternatively, ΔD at the same arrival angle CM and ΔD DM The average value of is determined as ΔD at the arrival angle, that is, the ranging difference ΔD = (ΔD DM +ΔD CM ) / 2; or, ΔD under the same arrival angle DM and ΔD CM The maximum value in is determined as ΔD at the arrival angle, that is, the ranging difference ΔD = max(ΔD DM ,ΔD CM ).

[0142] Fig. 13B : is a schematic diagram of the distance measurement difference after fusion processing provided in an embodiment of the present application. In the figure, the distance measurement difference between the first antenna and the second antenna is ΔD=max(ΔD DM ,ΔD CM ). As can be seen from the figure, within the arrival angle range of -160° to -20°, the ranging difference ΔD between the first antenna and the second antenna is greater than the distance threshold, which can accurately reflect the field difference between the first antenna and the second antenna, and help to accurately determine the arrival angle range of the wireless signal. To this end, in this embodiment, the measuring device can first determine the ranging difference ΔD between the first antenna and the second antenna, and then determine the arrival angle range of the wireless signal based on whether the ranging difference ΔD is greater than the distance threshold.

[0143] Fig.14 This is a flow chart of determining the arrival angle range provided by an embodiment of the present application, which specifically includes the following steps S1401 to S1406.

[0144] S1401: The measuring device switches the second antenna to a DM antenna.

[0145] Specifically, Figure 7B Taking the measurement device shown in the figure as an example, the measurement device can control the switch to connect the feed point F2 through the arrival angle measurement module, so as to switch the second antenna to the DM state, that is, switch the second antenna to a DM antenna.

[0146] S1402: The measuring device determines a first difference ΔD between the distances measured by the first antenna and the DM antenna. DM .

[0147] In this embodiment, the measuring device can measure the distance A between the source device and the measuring device through the first antenna based on UWB ranging or other methods, and measure the distance B between the source device and the measuring device through the CM antenna. It can be understood that the difference between the distance A and the distance B is the first difference ΔD DM .

[0148] S1403: The measuring device switches the second antenna to the CM antenna.

[0149] Similarly, Figure 7B Taking the measurement device shown in the figure as an example, the measurement device can control the switch to connect the feed point F3 through the arrival angle measurement module, so as to switch the second antenna to the CM state, that is, switch the second antenna to a CM antenna.

[0150] S1404: The measuring device determines a second difference ΔD between the distances measured by the first antenna and the CM antenna. CM .

[0151] Similarly, in this embodiment, the measuring device can also measure the distance C between the source device and the measuring device through the first antenna based on UWB ranging or other methods, and measure the distance D between the source device and the measuring device through the CM antenna. It can be understood that the difference between the distance C and the distance D is the second difference ΔD CM .

[0152] S1405, the measuring device determines ΔD DM and ΔD CM The maximum value max(ΔD DM ,ΔD CM ).

[0153] S1406, the measuring device is based on max(ΔD DM ,ΔD CM ) and the field pattern status of the measuring device to determine the arrival angle range of the wireless signal.

[0154] Taking the first antenna and the second antenna satisfying the field pattern state 1 as an example, when max(ΔD DM ,ΔD CM ) is less than the distance threshold, it means that when the wireless signal propagates to the first antenna and the second antenna, the antenna radiation pattern on the propagation path is basically the same, and the wireless signal comes from the back of the measuring device, and its arrival angle range is 0 to 180°. DM ,ΔD CM ) is greater than or equal to the distance threshold, it means that when the wireless signal propagates to the first antenna and the second antenna, the antenna radiation field patterns on the propagation path are quite different, and the wireless signal comes from the front of the measuring device, and its arrival angle range is -180° to 0°.

[0155] (II) Determining the arrival angle of the wireless signal based on the arrival angle range of the wireless signal

[0156] The phase difference φ of the wireless signal is usually preset in the measurement equipment ant1 -φ ant2The correspondence between the actual value of the angle of arrival and the actual value of the angle of arrival is obtained by the developer through measuring the measuring device in a measurement environment such as a laboratory. It can be understood that for each measuring device, this correspondence is usually fixed. Therefore, when the measuring device detects the measured value φ of the phase difference between the first antenna and the second antenna receiving the wireless signal ant1 -φ ant2 Afterwards, we can determine φ ant1 -φ ant2 The correlation between the true value of the phase difference at different arrival angles is calculated, and the arrival angle of the wireless signal is determined based on the correlation.

[0157] Fig.15 It is a schematic diagram of the correlation of phase difference provided by an embodiment of the present application. The horizontal axis in the figure is the true value of the arrival angle, and the first angle range of -180° to 0° corresponds to the front of the measuring device, and the second angle range of 0° to 180° is located on the back of the measuring device. The vertical axis in the figure is the correlation between the measured value and the true value of the phase difference at different arrival angles. The larger the value of the correlation, the higher the possibility that the corresponding arrival angle is the true arrival angle. Therefore, the measuring device usually determines the arrival angle corresponding to one or more higher correlations as the arrival angle of the wireless signal. However, the phase difference between the two wireless signals with arrival angles of θ and -θ is basically the same, and the correlation between this phase difference and the true value of the phase difference at θ and -θ may be large, resulting in inaccurate arrival angle measurement results. For example Fig.15 As shown, the correlations corresponding to the arrival angles -110° and 110° are both large. Therefore, -110° and 110° may both be the arrival angles of the wireless signal, resulting in inaccurate measurement results of the arrival angle.

[0158] Therefore, in this embodiment, after determining the arrival angle range of the wireless signal, the measuring device can determine the measured value of the arrival angle by combining the correlation of the phase differences of different arrival angles in the arrival angle range.

[0159] For example, when the arrival angle of the wireless signal is between -180° and 0°, the measuring device can determine the correlation between the measured value of the phase difference of the wireless signal and the true value of the phase difference at different arrival angles within -180° to 0°, and determine the arrival angle of the wireless signal based on the correlation. Fig.15 As an example, according to the correlation shown Fig.15 With the largest correlation, the measuring device can determine that the arrival angle of the wireless signal is -110° within -180° to 0°, thereby improving the accuracy of the arrival angle measurement performed by the measuring device.

[0160] When the measuring device determines the arrival angle of the wireless signal according to the arrival angle range of the wireless signal, it can first determine the arrival angle range of the wireless signal and then perform the arrival angle measurement within the arrival angle range; or it can first perform the arrival angle measurement and determine multiple candidate arrival angles, then determine the arrival angle range of the wireless signal, and filter the candidate arrival angles according to the arrival angle range to determine the final arrival angle. See Example 1 and Example 2 below for details.

[0161] Example 1: The measuring device first determines the arrival angle range of the wireless signal, and then performs arrival angle measurement within the arrival angle range.

[0162] Fig.16 This is a schematic diagram of the arrival angle measurement process provided by an embodiment of the present application, which specifically includes the following steps S1601 to S1604.

[0163] S1601, the measuring device determines the arrival angle range of the wireless signal. Please refer to the above for details, which will not be described here.

[0164] S1602: The measuring device determines a measured value of a phase difference between wireless signals received by the first antenna and the second antenna.

[0165] S1603: The measuring device determines, within the range of the arrival angle, the correlation between the measured value of the phase difference and the true value of the phase difference at different arrival angles.

[0166] For example, when the wireless signal comes from the front of the measuring device and its arrival angle range is -180° to 0°, the measured value of the phase difference φ ant1 -φ ant2 The correlation with the true value of each phase difference of the wireless signal in the range of -180° to 0° is as follows Fig.17 shown.

[0167] It should be noted that, in this embodiment, the measuring device does not need the correlation between the measured value and the true value of the phase difference in the range of 0° to 180°, which can reduce the amount of calculation of the measuring device and improve the measurement rate of the arrival angle.

[0168] S1604: The measuring device determines the arrival angle of the wireless signal based on the correlation.

[0169] In some embodiments, the measuring device may determine the angle of arrival with the highest phase difference correlation as the angle of arrival of the wireless signal. Fig.17 Taking the correlation diagram shown as an example, it can be seen from the figure that the correlation of the phase difference at the arrival angle of -110° is the highest, so -110° is determined as the arrival angle of the wireless signal.

[0170] Example 2: The measuring device first determines a plurality of candidate arrival angles, and then screens the candidate arrival angles according to the arrival angle range of the wireless signal, thereby determining a final arrival angle.

[0171] Fig.18 This is a schematic diagram of an arrival angle measurement process provided by another embodiment of the present application, which specifically includes the following steps S1801 to S1805.

[0172] S1801: A measuring device determines a measured value of a phase difference between wireless signals received by a first antenna and a second antenna.

[0173] It should be noted that, when the second antenna is a co-body antenna, the measured value of the phase difference may be a measured value of the phase difference between the first antenna and the DM antenna, or a measured value of the phase difference between the first antenna and the CM antenna.

[0174] S1802, the measuring device determines the correlation between the measured value of the phase difference and the true value of the phase difference at each arrival angle within the range of -180° to 180°.

[0175] In one embodiment, the correlation between the measured value of the phase difference and the true value of each phase difference of the wireless signal in the range of -180° to 180° is as follows: Fig.15 shown.

[0176] S1803: The measuring device determines a candidate arrival angle of the wireless signal based on the correlation.

[0177] by Fig.15 Taking the correlation diagram shown as an example, the measuring device can determine multiple arrival angles with higher correlation, such as -110° and 110°, as candidate arrival angles of the wireless signal.

[0178] S1804, the measuring device determines the arrival angle range of the wireless signal. Please refer to the above for details, which will not be described here.

[0179] S1805: The measuring device determines the candidate arrival angle within the arrival angle range as the arrival angle of the wireless signal.

[0180] Taking the arrival angle range of the wireless signal as -180° to 0°, and the candidate arrival angles including -110° and 110° as an example, the measurement device can determine -110° within the arrival angle range of -180° to 0° as the arrival angle of the wireless signal.

[0181] In this embodiment, after determining that the arrival angle of the wireless signal is -110°, the measuring device may display, for example, Fig.19The direction indication information shown is used to indicate the direction of the wireless signal to the user. It can be understood that the direction of the wireless signal is also the direction of the source device relative to the measuring device. In addition, the measuring device can also measure the distance information between the device and the source device of the wireless signal, such as a distance of 11m.

[0182] In summary, through the arrival angle measurement method provided by this embodiment, after determining the arrival angle range of the wireless signal, the measuring device can further determine the arrival angle of the wireless signal within the arrival angle range, thereby improving the measurement accuracy of the arrival angle.

[0183] However, in some special cases, such as Fig. 20 As shown in (a), the measured value of the phase difference has a high correlation with the true value at multiple arrival angles of the wireless signal, such as -178°, -135°, -60°, -18°, and 50°. Fig. 20 As shown in (b) in the figure, even if the measuring device recognizes that the wireless signal comes from the back through the above method and narrows the possible arrival angle range to -180°~0°, it can only exclude 50° and cannot accurately determine the arrival angle among -178°, -135°, -60° and -18°.

[0184] Therefore, in order to further improve the accuracy of the arrival angle measurement result, the measuring device can also be combined with a rotation operation of the measuring device to further determine the arrival angle. Fig. 7A The measurement device shown in the figure is used to exemplify the arrival angle measurement method. It should be understood that the arrival angle measurement method provided in this embodiment can also be applied to, for example Figure 7B The measurement device shown includes a co-body antenna.

[0185] Fig.21 is a schematic flow chart of an arrival angle measurement method provided in other embodiments of the present application. Fig.21 As shown, the method includes the following steps S2101 to S2106.

[0186] S2101: The measuring device displays prompt information, where the prompt information is used to prompt the user to change the posture of the measuring device.

[0187] In some embodiments, the measurement device may display Fig. 22 Alternatively, the measuring device may display a prompt text such as "keep the phone upright and slowly turn the phone left and right" to prompt the user to rotate the phone left and right.

[0188] S2102, the measuring device determines the arrival angle range of the wireless signal. Please refer to the above for details, which will not be repeated here.

[0189] It should be noted that this embodiment does not limit the execution order of S2101 and S2102. In other words, the measuring device may execute S2101 first and then S2102; or may execute S2102 first and then S2101.

[0190] S2103, the measuring device determines the measured value of the phase difference of the wireless signal at multiple different times during the process of changing the posture.

[0191] For example, the measuring device may determine the phase difference of the wireless signal at times T1, T2, and T3, respectively.

[0192] S2104: The measuring device determines, within the range of the arrival angle of the wireless signal, the correlation between the measured values ​​of the phase difference of the wireless signal at the multiple different time instants and the true value of the phase difference at different arrival angles.

[0193] Taking the arrival angle range of the wireless signal as -180° to 0° as an example, at times T1, T2, and T3, the correlation between the measured value and the true value of the phase difference is as follows: Fig.23 As shown in (a), (b) and (c) in FIG. 1 , it can be seen from the figure that at times T1, T2 and T3, there are multiple points with high phase difference correlation. Therefore, based on the correlation at each of the above moments alone, the measurement equipment is usually unable to accurately identify the arrival angle of the wireless signal.

[0194] In view of this, this embodiment fuses the correlation between the measured values ​​and the true values ​​of the phase differences of the wireless signals at multiple different times, and determines the arrival angle of the wireless signals according to the fused phase differences. See S2105 to S2106 for details.

[0195] S2105, the measuring device fuses the correlations of the phase differences of the wireless signals at multiple different times to obtain a fused correlation.

[0196] In this embodiment, the measuring device fuses the correlations at multiple different times, including: the measuring device adds the correlations at the same arrival angle at multiple different times to obtain the fused correlation. For example, the correlations at the same arrival angle at times T1, T2, and T3 are added to obtain the following: Fig.23 The correlation shown in (d).

[0197] It should be noted that this embodiment does not limit the fusion processing method. For example, the measurement device can also determine the average value of the correlation of the same arrival angle at multiple different times, and use the average value as the fused correlation.

[0198] S2106: The measuring device determines the arrival angle of the wireless signal based on the fused correlation.

[0199] For example, the measuring device may determine the angle of arrival corresponding to the maximum correlation as the angle of arrival of the wireless signal. Fig.23 Taking the correlation diagram shown in (d) in FIG. 1 as an example, the measuring device can determine the arrival angle of -60° corresponding to the maximum correlation as the arrival angle of the wireless signal.

[0200] In addition, in this embodiment, after determining that the arrival angle of the wireless signal is -60°, the measuring device can display, for example Fig.24 The direction indication information shown is used to indicate to the user the direction from which the wireless signal comes. In addition, the measuring device can also measure the distance between the device and the source device of the wireless signal, for example, the distance is 5m.

[0201] Fig.25 : It is a schematic diagram of the arrival angle measurement error provided in an embodiment of the present application. In the figure, the horizontal axis is the true value of the arrival angle, and the vertical axis is the measurement error of the arrival angle, and the measurement error is the difference between the true value of the arrival angle and the measured value. It can be seen that within the angle measurement range (field of view, FOV) of -120° to -70° and 40° to 150°, the absolute value of the average measurement error of the arrival angle is less than 10°. In other words, through the method provided in this embodiment, the measurement result of the arrival angle is relatively accurate.

[0202] In summary, through the method provided in the embodiment of the present application, the measuring device can improve the accuracy of the angle of arrival measurement by rotating the mobile phone to assist in angle measurement.

[0203] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0204] Based on the same concept, as an implementation of the above method, the embodiments of the present application provide the following technical solutions, and the embodiments of these technical solutions correspond to the aforementioned method embodiments. For ease of reading, the details of the aforementioned method embodiments will not be repeated here one by one, but it should be clear that each solution in this embodiment can correspond to the implementation of all the contents in the aforementioned method embodiments.

[0205] The present application also provides a chip, see Fig.26 As shown, the chip includes a processor and a memory, in which a computer program is stored. When the computer program is executed by the processor, the arrival angle measurement method provided in the above embodiments is implemented.

[0206] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the arrival angle measurement method shown in the above embodiments is implemented.

[0207] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed by an electronic device, the electronic device implements the arrival angle measurement method shown in the above embodiments.

[0208] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0209] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (doubledatarate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM), and direct rambus RAM (DR RAM).

[0210] In the embodiments provided in the present application, the division of each framework or module is only a logical function division. There may be other division methods in actual implementation. For example, multiple frameworks or modules can be combined or integrated into another system, or some features can be ignored or not executed.

[0211] In addition, each functional module in each embodiment of the present application can be integrated into a processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software functional modules.

[0212] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0213] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0214] The embodiments described above 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 aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for measuring an angle of arrival, characterized in that: Applied to an electronic device, the electronic device includes a first antenna and a second antenna; antenna radiation patterns of the first antenna and the second antenna are similar within a first angle range around the electronic device, and are not similar within a second angle range around the electronic device, the method includes: Determine a difference in a target parameter measured according to a wireless signal using the first antenna and the second antenna; Determine, according to the difference, an arrival angle range of the wireless signal; wherein the arrival angle range is the first angle range or the second angle range; The angle of arrival of the wireless signal is measured using the first antenna and the second antenna according to the angle of arrival range.

2. The method according to claim 1, characterized in that Determining the arrival angle range of the wireless signal according to the difference includes: When the difference is less than or equal to a threshold, determining that the arrival angle range of the wireless signal is the first angle range; When the difference is greater than the threshold, the arrival angle range of the wireless signal is determined to be the second angle range.

3. The method according to claim 1 or 2, characterized in that: The first angle range corresponds to the back side of the electronic device, and the second angle range corresponds to the front side of the electronic device; or, The first angle range corresponds to the front side of the electronic device, and the second angle range corresponds to the back side of the electronic device; Among them, the front side is the side facing the screen of the electronic device, and the back side is the side facing the back cover of the electronic device; or, the front side is the area facing the top of the screen of the electronic device, and the back side is the area facing the bottom of the screen of the electronic device.

4. The method according to any one of claims 1 to 3, characterized in that: The target parameter is the distance from a source device to the electronic device, and the source device is used to transmit the wireless signal; or The target parameter is the power of the received wireless signal.

5. The method according to any one of claims 1 to 4, characterized in that: The determining a difference in a target parameter measured by using the first antenna and the second antenna according to the wireless signal includes: Using the first antenna, determining a first measurement result of the target parameter according to the wireless signal; Using the second antenna, determining a second measurement result of the target parameter according to the wireless signal; An absolute value of a difference between the first measurement result and the second measurement result is determined as a difference between target parameters measured by the first antenna and the second antenna.

6. The method according to any one of claims 1 to 5, characterized in that: The second antenna is a co-body antenna, and the co-body antenna includes a differential mode DM antenna and a common mode CM antenna; accordingly, determining the difference between the target parameters measured by the first antenna and the second antenna according to the wireless signal includes: Determine a first difference value of a target parameter measured by the first antenna and the DM antenna according to the wireless signal; Determine a second difference between the target parameter measured by the second antenna and the CM antenna according to the wireless signal; A difference between the target parameter measured using the first antenna and the second antenna is determined according to the first difference and the second difference.

7. The method according to claim 6, characterized in that: Determining, according to the first difference and the second difference, a measurement difference of the target parameter by the first antenna and the second antenna, includes: Determine the maximum value of the first difference and the second difference as the difference of the target parameter measured by the first antenna and the second antenna according to the wireless signal; or An average value of the first difference and the second difference is determined as a difference value of a target parameter measured by the first antenna and the second antenna according to a wireless signal.

8. The method according to any one of claims 1 to 7, characterized in that: The first antenna is a frame antenna, and the second antenna is a patch antenna.

9. The method according to any one of claims 1 to 8, characterized in that: Measuring the angle of arrival of the wireless signal using the first antenna and the second antenna according to the angle of arrival range includes: During the rotation of the electronic device, determining, within the range of the angle of arrival, the correlation between the measured values ​​of the phase difference of the wireless signal at multiple different times and the true values ​​of the phase difference at different angles of arrival; Performing fusion processing on the correlations at the multiple different moments to obtain fused correlations; The arrival angle of the wireless signal is determined according to the fused correlation.

10. The method according to claim 9, characterized in that The determining the arrival angle of the wireless signal according to the fused correlation includes: determining a maximum value among the fused correlations; The angle of arrival corresponding to the maximum value is determined as the angle of arrival of the wireless signal.

11. The method according to any one of claims 1 to 10, characterized in that: The sum of the first angle range and the second angle range covers 360° around the electronic device.

12. An electronic device, characterized in that: It comprises a first antenna and a second antenna; the antenna radiation patterns of the first antenna and the second antenna are similar within a first angle range around the electronic device and are not similar within a second angle range around the electronic device; the electronic device is configured to execute the method as described in any one of claims 1 to 11.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 11 is implemented.

14. A chip, characterized in that: The method comprises a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the method according to any one of claims 1 to 11 is implemented.

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