Mobile terminal, positioning method, electronic device, storage medium, and program product

Abstract

The present disclosure relates to the technical field of mobile positioning, and particularly relates to a mobile terminal, a positioning method, an electronic device, a storage medium and a program product. The mobile terminal comprises a first antenna and a second antenna, the frequency bands of the first antenna and the second antenna are the same as the Bluetooth frequency band; an antenna switching unit is used for receiving the same Bluetooth radio frequency signal transmitted by a target to be measured by switching the first antenna and the second antenna, obtaining a first Bluetooth radio frequency signal received by the first antenna and a second Bluetooth radio frequency signal received by the second antenna; a signal processing unit is used for obtaining the incident angle and the received signal strength indication (RSSI) value of the Bluetooth radio frequency signal based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal; and a positioning unit is used for determining the position information of the target to be measured based on the incident angle and the RSSI value. The present disclosure can greatly reduce the overall deployment and use cost of the Bluetooth AOA positioning system, and realize the mobilization and lightweight landing of the Bluetooth AOA positioning.

Description

Technical Field

[0001] This disclosure relates to the field of mobile positioning technology, and in particular to a mobile terminal, positioning method, electronic device, storage medium, and program product. Background Technology

[0002] Starting with Bluetooth version 5.1, the standardization officially introduced Angle of Arrival (AoA) and Angle of Departure (AoD) technologies. Existing positioning applications based on AOA technology are concentrated in specialized fields, namely, developing positioning products that build independent networks with AOA base stations and Bluetooth beacons. Consumer-grade mobile terminals such as smartphones are rarely used as AOA positioning devices, and there are no commercial cases of using consumer-grade mobile terminals such as smartphones as AOA base stations.

[0003] However, in existing positioning solutions based on AOA technology, AOA base stations require separate procurement and on-site deployment of dedicated hardware equipment, as well as the simultaneous procurement of supporting software services and function licenses. This not only significantly increases the overall deployment and usage costs of the positioning system, but also greatly limits the application of AOA positioning technology in scenarios requiring lightweight, temporary, and low-cost solutions. Summary of the Invention

[0004] In view of the above-mentioned technical problems, this disclosure provides a mobile terminal, a positioning method, an electronic device, a storage medium, and a program product.

[0005] In a first aspect, this disclosure provides a mobile terminal for Bluetooth AOA positioning, comprising: The first antenna and the second antenna share the same frequency band as the Bluetooth frequency band. The antenna switching unit is used to receive the same Bluetooth radio frequency signal transmitted by the target under test by switching the first antenna and the second antenna, and to obtain the first Bluetooth radio frequency signal received by the first antenna and the second Bluetooth radio frequency signal received by the second antenna. The signal processing unit is used to obtain the incident angle of the Bluetooth radio frequency signal and the received signal strength indicator (RSSI) value based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal. The positioning unit is used to determine the position information of the target under test based on the incident angle and RSSI value.

[0006] Furthermore, according to the mobile terminal of the first aspect of this disclosure, the antenna switching unit further includes a radio frequency switch or a switching circuit, and the antenna switching unit switches the first antenna and the second antenna by controlling the radio frequency switch or the switching circuit.

[0007] Furthermore, according to the mobile terminal of the first aspect of this disclosure, based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, the incident angle and received signal strength indication (RSSI) value of the Bluetooth radio frequency signal are obtained, including: Based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, the phase difference between the first antenna and the second antenna is obtained; The incident angle of the Bluetooth radio frequency signal is obtained based on the phase difference, the spacing between the first and second antennas, and the wavelength of the Bluetooth radio frequency signal. The RSSI value of the Bluetooth radio frequency signal is obtained based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal.

[0008] Furthermore, according to the mobile terminal of the first aspect of this disclosure, a preset path loss model is provided within the positioning unit; Based on the incident angle and RSSI value, the position information of the target under test is determined, including: Based on RSSI values ​​and path loss models, the distance between the mobile terminal and the target under test is obtained; The two-dimensional coordinates of the target are determined based on the incident angle and distance.

[0009] Furthermore, according to the first aspect of this disclosure, the mobile terminal is one of a smartphone, a tablet computer, or an in-vehicle intelligent terminal.

[0010] Secondly, this disclosure provides a positioning method for a mobile terminal using Bluetooth AOA positioning as described in the first aspect of this disclosure, comprising: By switching between the first antenna and the second antenna, the same Bluetooth radio frequency signal transmitted by the target under test is received, and the first Bluetooth radio frequency signal received by the first antenna and the second Bluetooth radio frequency signal received by the second antenna are obtained. Based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, the incident angle of the Bluetooth radio frequency signal and the received signal strength index (RSSI) value are obtained. The position information of the target under test is determined based on the incident angle and RSSI value.

[0011] Furthermore, according to the positioning method of the second aspect of this disclosure, based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, the incident angle and the received signal strength indicator (RSSI) value of the Bluetooth radio frequency signal are obtained, including: Based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, the phase difference between the first antenna and the second antenna is obtained; The incident angle of the Bluetooth radio frequency signal is obtained based on the phase difference, the spacing between the first and second antennas, and the wavelength of the Bluetooth radio frequency signal. The RSSI value of the Bluetooth radio frequency signal is obtained based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal.

[0012] Thirdly, this disclosure provides an electronic device, including: a memory for storing computer-readable instructions; and a processor for executing the computer-readable instructions, causing the electronic device to perform the method as described in any embodiment of the second aspect.

[0013] Fourthly, this disclosure provides a non-transitory computer-readable storage medium for storing computer-readable instructions that, when executed by a processor, cause the processor to perform the method as described in any embodiment of the second aspect.

[0014] Fifthly, this disclosure provides a computer program product, including a computer program that, when executed by a processor, implements the method as described in any embodiment of the second aspect.

[0015] This disclosure provides a mobile terminal, a positioning method, an electronic device, a storage medium, and a program product, apparatus, and electronic device. The mobile terminal of this disclosure integrates a first antenna, a second antenna, an antenna switching unit, a signal processing unit, and a positioning unit. It uses a general-purpose mobile terminal to replace the traditional dedicated AOA base station as the core hardware carrier for Bluetooth AOA positioning. It uses antenna switching to receive the same Bluetooth radio frequency signal and calculates the incident angle and RSSI value of the target under test. Then, it combines the incident angle and RSSI value to determine the location of the target under test. This eliminates the separate procurement, on-site deployment costs, and supporting software service and function licensing fees of dedicated AOA base stations, which can significantly reduce the overall deployment and use costs of the Bluetooth AOA positioning system. At the same time, relying on the inherent portability, mobility, and popularity of mobile terminals, it breaks through the limitations of traditional AOA positioning technology in scenarios such as lightweight, temporary, low-cost requirements and mobile inspection. It fills the technical gap of using consumer-grade mobile terminals such as mobile phones as AOA base stations, realizes the mobile and lightweight implementation of Bluetooth AOA positioning, and effectively expands the application scenarios and scope of Bluetooth AOA positioning technology.

[0016] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0017] The above and other objects, features, and advantages of this disclosure will become more apparent from the more detailed description of the embodiments thereof in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0018] Figure 1A schematic diagram of a conventional AOA positioning method provided in an embodiment of this disclosure; Figure 2 A schematic diagram illustrating yet another existing AOA positioning method provided in this disclosure embodiment; Figure 3 A schematic diagram illustrating yet another existing AOA positioning method provided in this disclosure embodiment; Figure 4 This is a schematic diagram of an existing mobile phone Bluetooth tag sensing scheme provided in an embodiment of this disclosure; Figure 5 A functional block diagram of a mobile terminal for Bluetooth AOA positioning provided in an embodiment of this disclosure; Figure 6 A flowchart illustrating a positioning method provided in an embodiment of this disclosure; Figure 7 A schematic diagram of a mobile phone for Bluetooth AOA positioning provided in an embodiment of this disclosure; Figure 8 A hardware block diagram of an electronic device provided in an embodiment of this disclosure; Figure 9 This is a schematic diagram of a computer-readable storage medium provided in an embodiment of this disclosure. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this disclosure more apparent, exemplary embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this disclosure, and not all embodiments of this disclosure. It should be understood that this disclosure is not limited to the exemplary embodiments described herein.

[0020] Figure 1 This is a schematic diagram of an existing AOA positioning method provided in an embodiment of this disclosure.

[0021] like Figure 1 As shown, the transmitter (such as a Bluetooth asset tracking tag) uses a single antenna to send a beacon signal. The receiver is fixed in position and equipped with an array antenna (at least two antennas). The receiver (such as a traditional AOA base station) receives the RF signal and calculates the IQ data of the signal to determine the phase difference. Simultaneously, it sequentially switches the antennas via an RF switch. The distance from the transmitter to the array antenna varies.

[0022] The phase of a signal changes continuously from 0 to 360 degrees (0~2×π) during transmission into three-dimensional space. Two antennas, antenna one and antenna two, are located at different positions on circles of different radii. The sinusoidal signals received by both antennas have inconsistent phases, exhibiting a phase difference. Figure 2 As shown, Figure 2This is a schematic diagram of another existing AOA positioning method provided in an embodiment of this disclosure.

[0023] The receiving ends (i.e., antenna one and antenna two) are located in different positions. If we want to find the distance r=C between antenna one P1 and antenna two P2,... t (C represents the speed of electromagnetic wave transmission, i.e., the speed of light; t represents the transmission time).

[0024] Using the sine wave period-distance formula, the transmission time equals a number of integer sine wave periods plus a fractional sine wave period less than one sine wave period, t = K T + uT = r / C (T represents the period of the sine wave, k represents an integer, and u represents a decimal).

[0025] Transformation formula: r = C×(K×T + u×T) When two antennas are close enough (less than half a wavelength), the whole-cycle ambiguity of the phase difference can be eliminated, meaning their K values ​​are equal. The formula for the distance difference between p1 and p2 is: r1 - r2 = C×(u1×T - u2×T) = C×T×(u1-u2) = λ×Δφ Δφ = u1 - u2 represents the phase difference, C × T is the signal wavelength λ, the Bluetooth frequency is 2.4 GHz, and the wavelength is approximately 12.5 cm. From the formula, it can be deduced that if the phase difference between P1 and P2 is known, the distance between the two points P1 and P2 can be calculated.

[0026] Figure 3 This is a schematic diagram of another existing AOA positioning method provided in an embodiment of this disclosure. Figure 3 The formula for calculating the incident angle is listed. Based on the phase difference Δφ calculated for IQ, that is, the phase difference between the active antenna and the reference antenna, and given the distance d between the two antennas and the carrier wavelength λ (λ=c / f= 12.5cm), the incident angle θ of AOA can be calculated as θ=arccos(λΔφ / 2πd).

[0027] Figure 4 This is a schematic diagram of an existing mobile phone Bluetooth tag sensing scheme provided in an embodiment of this disclosure.

[0028] Current terminal products, such as mobile phones, generally support dual antennas for WiFi and reuse one of the antennas as a single antenna for Bluetooth. Even if they support Bluetooth AOA technology, they only function as Bluetooth AOA beacons and cannot act as AOA base stations. Their use cases are limited to deploying independent AOA base stations. The mobile phone transmits a Bluetooth signal, and the AOA base station uses this signal to locate the phone. In the current solution, the mobile phone is the device to be located, and the AOA base station, after being installed and deployed separately, calculates the phone's location. The drawback of the current solution is that the mobile phone can only act as a Bluetooth beacon, and the AOA base station requires separate equipment purchase and deployment, along with the procurement of AOA base station-related functions to calculate the phone's location. This limits its practical application scenarios.

[0029] like Figure 4 As shown, if mobile phone 401 acts as a Bluetooth base station, it can only perform one-dimensional positioning of Bluetooth tags 402, 403, and 404. For example, it can issue a warning if a Bluetooth tag is out of range. It can only sense whether a Bluetooth tag is within the coverage area based on the Bluetooth connection status or RSSI strength, and it cannot locate or orient the location of the Bluetooth tag, which has limitations.

[0030] Figure 5 This is a functional block diagram of a mobile terminal for Bluetooth AOA positioning provided in an embodiment of the present disclosure.

[0031] like Figure 5 As shown, the mobile terminal 500 for Bluetooth AOA positioning includes: a first antenna 501, a second antenna 502, an antenna switching unit 503, a signal processing unit 504, and a positioning unit 505.

[0032] Furthermore, the first antenna 501 and the second antenna 502 operate in the same frequency band as the Bluetooth communication frequency band, which can ensure accurate reception of Bluetooth radio frequency signals.

[0033] Furthermore, the antenna switching unit 503 is used to receive the same Bluetooth radio frequency signal transmitted by the target under test by switching the first antenna 501 and the second antenna 502, and to acquire the first Bluetooth radio frequency signal received by the first antenna 501 and the second Bluetooth radio frequency signal received by the second antenna 502. The target under test can be a Bluetooth tag (such as an AirTag, Bluetooth anti-loss device, etc.).

[0034] Specifically, the antenna switching unit 503 can only connect and process one signal at a time. By switching the first antenna 501 and the second antenna 502, it can acquire the same Bluetooth radio frequency signal transmitted by the target under test. Ultimately, the first antenna 501 receives the first Bluetooth radio frequency signal, and the second antenna 502 receives the second Bluetooth radio frequency signal. The first and second Bluetooth radio frequency signals are essentially the same Bluetooth radio frequency signal transmitted by the same target under test; they are simply two copies of the signal formed after being received by the first antenna 501 and the second antenna 502 of the mobile terminal, respectively.

[0035] For example, the antenna switching unit 503 starts working, first turning on the first antenna 501 to receive and record the first Bluetooth radio frequency signal; then switching on the second antenna 502 to receive and record the second Bluetooth radio frequency signal of the same Bluetooth signal.

[0036] In one embodiment of this disclosure, the antenna switching unit 503 further includes a radio frequency switch or switching circuit, and the antenna switching unit switches the first antenna 501 and the second antenna 502 by controlling the radio frequency switch or switching circuit.

[0037] Specifically, an RF switch is an electronic device specifically designed for switching RF signal paths. Unlike ordinary circuit switches, it is optimized for Bluetooth RF signals, ensuring almost no attenuation or interference during signal switching.

[0038] Specifically, by setting a switching circuit to switch between the first and second antennas, compared to an RF switch, it can adapt to the impedance characteristics of the two antennas, reducing signal loss during switching; it can also filter out environmental noise interference, improving the purity of the received signal. Furthermore, the signal processing unit 504 is used to obtain the incident angle of the Bluetooth RF signal and the Received Signal Strength Indication (RSSI) value based on the first and second Bluetooth RF signals.

[0039] In one embodiment of this disclosure, obtaining the incident angle and Received Signal Strength Indication (RSSI) value of the Bluetooth radio frequency signal based on a first Bluetooth radio frequency signal and a second Bluetooth radio frequency signal includes: Based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, the phase difference between the first antenna and the second antenna is obtained; The incident angle of the Bluetooth radio frequency signal is obtained based on the phase difference, the spacing between the first and second antennas, and the wavelength of the Bluetooth radio frequency signal. The RSSI value of the Bluetooth radio frequency signal is obtained based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal.

[0040] Specifically, the incident angle indicates the propagation path difference that occurs when the same Bluetooth radio frequency signal is emitted from the target under test and reaches two antennas with a fixed distance (i.e., the first antenna and the second antenna), resulting in a phase difference between the two signals. The signal processing unit 504 calculates this phase difference and, combined with the distance between the first and second antennas and the wavelength of the Bluetooth radio frequency signal, can deduce the incident angle of the Bluetooth radio frequency signal (i.e., the direction of the target under test relative to the mobile terminal). The RSSI value is a quantitative indicator of the received power of the Bluetooth radio frequency signal (i.e., the first Bluetooth radio frequency signal or the second Bluetooth radio frequency signal); the stronger the signal, the larger the RSSI value. The magnitude of the RSSI value is related to the propagation distance (the greater the distance, the more severe the signal attenuation, and the smaller the RSSI value).

[0041] Furthermore, the positioning unit 505 is used to determine the position information of the target under test based on the incident angle and RSSI value.

[0042] In one embodiment of this disclosure, determining the position information of the target under test based on the incident angle and RSSI value includes: Based on RSSI values ​​and path loss models, the distance between the mobile terminal and the target under test is obtained; The two-dimensional coordinates of the target are determined based on the incident angle and distance.

[0043] The path loss model is preset in the positioning unit 505.

[0044] Specifically, the path loss model is a pre-derived mathematical formula that establishes the correspondence between signal strength (RSSI value) and propagation distance. This path loss model can be any path loss model used in existing Bluetooth positioning technologies, and this disclosure does not limit it.

[0045] For example, the positioning unit 505 substitutes the RSSI value into the path loss model to calculate the distance d between the mobile terminal and the target. Using trigonometric functions, the distance d and the incident angle can be converted into the two-dimensional coordinates (x, y) of the target. The resulting (x, y) is the relative coordinate of the target in a two-dimensional coordinate system with the mobile terminal as the origin.

[0046] Furthermore, mobile terminals include, but are not limited to, smartphones, tablets, and in-vehicle smart terminals. Among these, smartphones can be implemented by adding a radio frequency switch to a phone with dual WiFi antennas.

[0047] In summary, according to the technical solution provided in the embodiments of this disclosure, this disclosure achieves time-division reception of the same Bluetooth radio frequency signal by configuring dual antennas that match the Bluetooth frequency band and combining them with radio frequency switches or switching circuits. It calculates the incident angle using the phase difference between the two signal replicas, obtains the RSSI value by combining the signal strength, and then calculates the distance based on a preset path loss model and derives the target's relative coordinates through trigonometric functions. This not only reduces hardware costs and signal switching losses and noise interference, but also improves the accuracy of angle and distance calculations. It can efficiently achieve the relative positioning of the Bluetooth target under test and is compatible with various terminal forms such as smartphones and tablets, possessing strong practicality and compatibility.

[0048] Figure 6 This is a flowchart illustrating a positioning method provided in an embodiment of the present disclosure.

[0049] like Figure 6 As shown, the positioning method for a mobile terminal used for Bluetooth AOA positioning specifically includes the following steps: Step 601: By switching the first antenna and the second antenna, receive the same Bluetooth radio frequency signal transmitted by the target under test, and obtain the first Bluetooth radio frequency signal received by the first antenna and the second Bluetooth radio frequency signal received by the second antenna.

[0050] Step 602: Based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, obtain the incident angle of the Bluetooth radio frequency signal and the received signal strength indicator (RSSI) value.

[0051] Step 603: Determine the position information of the target under test based on the incident angle and RSSI value.

[0052] In one embodiment of this disclosure, obtaining the incident angle and Received Signal Strength Indication (RSSI) value of the Bluetooth radio frequency signal based on a first Bluetooth radio frequency signal and a second Bluetooth radio frequency signal includes: Based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, the phase difference between the first antenna and the second antenna is obtained; The incident angle of the Bluetooth radio frequency signal is obtained based on the phase difference, the spacing between the first and second antennas, and the wavelength of the Bluetooth radio frequency signal. The RSSI value of the Bluetooth radio frequency signal is obtained based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal.

[0053] Specifically, the mobile terminal switches between the first and second antennas via an antenna switching unit to receive the same Bluetooth radio frequency signal from the same target under test, thereby obtaining the first Bluetooth radio frequency signal received by the first antenna and the second Bluetooth radio frequency signal received by the second antenna, respectively. Subsequently, the mobile terminal obtains the phase difference between the first and second Bluetooth radio frequency signals via a signal processing unit, calculates the incident angle of the signal by combining the distance between the first and second antennas and the Bluetooth signal wavelength, and extracts the received power of the two signals to obtain the RSSI value. Finally, the positioning unit combines the direction information corresponding to the incident angle with the distance information calculated by the path loss model based on the RSSI value, and determines the position information of the target under test relative to the mobile terminal through geometric calculation.

[0054] In summary, according to the technical solution provided in the embodiments of this disclosure, this disclosure uses dual antennas to switch and receive the same Bluetooth radio frequency signal, calculates the incident angle and RSSI value by combining the signal phase difference and power respectively, and then fuses the direction and distance information to complete the positioning. This simplifies the hardware architecture, reduces interference and loss in signal reception, and improves the accuracy and efficiency of Bluetooth AOA positioning.

[0055] To describe in detail the positioning method for a mobile terminal using Bluetooth AOA positioning provided in the embodiments of this disclosure, please refer to the appendix. Figure 7 , Figure 7 This is a schematic diagram of a mobile phone used for Bluetooth AOA positioning according to an embodiment of this disclosure.

[0056] The principle of Bluetooth AOA positioning technology requires at least two antennas. WiFi and Bluetooth antennas operate on the same frequency, and current mobile terminal solutions generally use a shared antenna for both WiFi and Bluetooth. The two antennas of the mobile terminal can serve as Bluetooth AOA receiving antennas, enabling the phone to act as an AOA base station. Current mobile phones use single-channel Bluetooth; therefore, to achieve single-channel Bluetooth using dual-channel WiFi antennas, a switching device needs to be added to the Bluetooth path to switch between the reference antenna and the active antenna required for AOA positioning. (See internal design diagram of the mobile terminal for reference.) Figure 6 As shown, by adding an RF switch to the mobile phone's WCN chip, the mobile phone can be used as a Bluetooth AOA base station.

[0057] Some existing mobile terminals can also function without the need for additional RF switching devices. The WCN chip has a built-in Bluetooth path that can select either WiFi antenna 1 or WiFi antenna 2. By simply collecting the phase difference between the two antennas according to the AOA positioning scheme, the Bluetooth AOA base station function can be realized.

[0058] Based on the relationship between the RSSI signal strength and distance attenuation of Bluetooth, the distance d between the Bluetooth tag (i.e., the aforementioned target under test) and the mobile terminal is obtained. The incident angle α is calculated by AOA, and the position x and y of the Bluetooth tag relative to the mobile terminal can be calculated. By adjusting the position of the mobile phone in real time, the direction of the tag is located and the Bluetooth tag is found. Compared with technologies such as UWB, the positioning cost is lower and the technical difficulty is reduced. The positioning and orientation function can be realized on the basis of existing materials.

[0059] This disclosure allows mobile terminals such as smartphones that support dual WiFi antennas to switch to two WiFi antennas via an internal switch with minimal or no hardware development required. By calculating the phase difference between the antennas to obtain the AOA incident angle, it can be used as a Bluetooth AOA base station to achieve various application scenarios, as shown in the following examples: Scenario 1: Existing mobile tags / Bluetooth tags (such as AirTags, Bluetooth anti-loss devices, etc.) generally use UWB or Bluetooth technology, and some also use GPS positioning tags. All of these have various drawbacks. For example, UWB requires a phone with UWB functionality, increasing the phone's cost. While Bluetooth tags are low-cost, current Bluetooth tags only offer one-dimensional positioning within a range and cannot determine the tag's direction; they are only perceptible within the Bluetooth signal coverage area. This disclosure utilizes the dual WiFi antennas of existing mobile phones, transmitting Bluetooth signals as an AOA base station. The Bluetooth tag acts as a beacon, emitting Bluetooth signals. Direction can be calculated using AOA, and by combining this with the Bluetooth RSSI signal strength, the beacon's two-dimensional coordinates can be obtained, achieving orientation and positioning.

[0060] Scenario 2: Currently, smart car keys are widely used in the automotive industry. Keyless entry requires the owner to carry the car key. For a mobile phone to achieve keyless entry, it needs to support UWB technology. Existing Bluetooth can only sense within range and cannot provide directional keyless entry for the driver and passenger seats or individual doors. This invention utilizes the dual WiFi antennas of existing mobile phones, transmitting Bluetooth signals as an AOA base station. The car doors act as beacons, emitting Bluetooth signals. After AOA calculation, the direction can be determined. Combined with the Bluetooth RSSI signal strength, the relative position of the car door can be obtained. When the mobile phone approaches different car doors, it can locate, authenticate, and unlock the door.

[0061] Figure 8 This is a hardware block diagram of an electronic device provided according to an embodiment of the present disclosure. The electronic device 800 according to an embodiment of the present disclosure includes at least a processor and a memory for storing computer-readable instructions. When the computer-readable instructions are loaded and executed by the processor, the processor performs the positioning method for a mobile terminal using Bluetooth AOA positioning as described in any of the preceding embodiments of the present disclosure.

[0062] Figure 8The illustrated electronic device 800 specifically includes a central processing unit (CPU) 801, a graphics processing unit (GPU) 802, and a memory 803. These units are interconnected via a bus 804. The CPU 801 and / or GPU 802 can function as the aforementioned processor, and the memory 803 can function as the aforementioned memory storing computer-readable instructions. Furthermore, the electronic device 800 may also include a communication unit 805, a storage unit 806, an output unit 807, an input unit 808, and an external device 809, all of which are also connected to the bus 804.

[0063] Figure 9 This is a schematic diagram of a computer-readable storage medium provided in an embodiment of this disclosure. (As shown...) Figure 9 As shown, a computer-readable storage medium 900 according to an embodiment of this disclosure stores computer-readable instructions 901 thereon. When the computer-readable instructions 901 are executed by a processor, the positioning method for a mobile terminal for Bluetooth AOA positioning according to any embodiment of this disclosure described above with reference to the accompanying drawings is performed. The computer-readable storage medium includes, but is not limited to, volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0064] This disclosure further provides a computer program product, including a computer program that, when executed by a processor, implements the positioning method for a mobile terminal for Bluetooth AOA positioning as described in any of the preceding embodiments of this disclosure.

[0065] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0066] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0067] The block diagrams of devices, apparatuses, devices, and systems disclosed herein are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0068] Additionally, as used herein, the "or" used in a list of items beginning with "at least one" indicates a separate list, such that a list of, for example, "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not imply that the described example is preferred or better than other examples.

[0069] It should also be noted that in the systems and methods of this disclosure, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions to this disclosure.

[0070] Various changes, substitutions, and modifications can be made to the technology described herein without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of this disclosure is not limited to the specific aspects of the processes, machines, manufactures, events, means, methods, and actions described above. Currently existing or later-developed processes, machines, manufactures, events, means, methods, or actions that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein can be utilized. Therefore, the appended claims include such processes, machines, manufactures, events, means, methods, or actions within their scope.

[0071] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0072] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this disclosure to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. A mobile terminal for Bluetooth AOA positioning, characterized in that, include: The first antenna and the second antenna share the same frequency band as the Bluetooth frequency band. The antenna switching unit is used to receive the same Bluetooth radio frequency signal transmitted by the target under test by switching the first antenna and the second antenna, and to obtain the first Bluetooth radio frequency signal received by the first antenna and the second Bluetooth radio frequency signal received by the second antenna. The signal processing unit is configured to obtain the incident angle and the received signal strength index (RSSI) value of the Bluetooth radio frequency signal based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal. The positioning unit is used to determine the position information of the target under test based on the incident angle and the RSSI value.

2. The mobile terminal for Bluetooth AOA positioning according to claim 1, characterized in that, The antenna switching unit further includes a radio frequency switch or a switching circuit, and the antenna switching unit switches the first antenna and the second antenna by controlling the radio frequency switch or the switching circuit.

3. The mobile terminal for Bluetooth AOA positioning according to claim 1, characterized in that, The step of obtaining the incident angle and Received Signal Strength Indication (RSSI) value of the Bluetooth radio frequency signal based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal includes: Based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, the phase difference between the first antenna and the second antenna is obtained; The incident angle of the Bluetooth radio frequency signal is obtained based on the phase difference, the spacing between the first antenna and the second antenna, and the wavelength of the Bluetooth radio frequency signal. The RSSI value of the Bluetooth radio frequency signal is obtained based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal.

4. The mobile terminal for Bluetooth AOA positioning according to claim 1, characterized in that, The positioning unit contains a preset path loss model; The determination of the position information of the target under test based on the incident angle and the RSSI value includes: Based on the RSSI value and the path loss model, the distance between the mobile terminal and the target to be measured is obtained; Based on the incident angle and the distance, the two-dimensional coordinates of the target to be measured are determined.

5. The mobile terminal for Bluetooth AOA positioning according to claim 1, characterized in that, The mobile terminal is one of the following: smartphone, tablet computer, or in-vehicle intelligent terminal.

6. A positioning method for a mobile terminal using Bluetooth AOA positioning as described in any one of claims 1-5, characterized in that, include: By switching between the first antenna and the second antenna, the same Bluetooth radio frequency signal emitted by the target under test is received, and the first Bluetooth radio frequency signal received by the first antenna and the second Bluetooth radio frequency signal received by the second antenna are obtained. Based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, the incident angle and the received signal strength index (RSSI) value of the Bluetooth radio frequency signal are obtained; Based on the incident angle and the RSSI value, the position information of the target to be measured is determined.

7. The positioning method according to claim 6, characterized in that, The step of obtaining the incident angle and Received Signal Strength Indication (RSSI) value of the Bluetooth radio frequency signal based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal includes: Based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal, the phase difference between the first antenna and the second antenna is obtained; The incident angle of the Bluetooth radio frequency signal is obtained based on the phase difference, the spacing between the first antenna and the second antenna, and the wavelength of the Bluetooth radio frequency signal. The RSSI value of the Bluetooth radio frequency signal is obtained based on the first Bluetooth radio frequency signal and the second Bluetooth radio frequency signal.

8. An electronic device, characterized in that, include: Memory, used to store computer-readable instructions; as well as A processor for executing the computer-readable instructions, causing the electronic device to perform the positioning method as described in any one of claims 6 to 7.

9. A non-transitory computer-readable storage medium for storing computer-readable instructions, characterized in that, When the computer-readable instructions are executed by a processor, the processor performs the positioning method as described in any one of claims 6 to 7.

10. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the positioning method as described in any one of claims 6 to 7.

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