阅读说明：本技术 无线装置以及定位方法 (Wireless device and positioning method ) 是由 刘一如 于 2019-08-28 设计创作，主要内容包括：本文件提供一种无线装置以及定位方法。无线装置包含天线模块以及控制器。天线模块包含多个天线,其中各天线围绕一基准点等间距地设置。控制器耦接天线模块,并计算各天线的一信号强度以于这些天线中选择多个关注天线；两两计算这些关注天线的信号,以获得多个合成信号；以及根据这些合成信号计算多个相位角,以使用这些相位角计算一定位角度。如此一来,使用准确度较低但为唯一的相位角(即粗略角),于准确度较高的多个相位角当中进行筛选,以选出与粗略角的夹角最小的相位角,而可找到高准确度的定位角度,以提升定位的精确度。(This document provides a wireless device and a positioning method. The wireless device comprises an antenna module and a controller. The antenna module includes a plurality of antennas, wherein each antenna is disposed at equal intervals around a reference point. The controller is coupled with the antenna module and calculates a signal strength of each antenna so as to select a plurality of concerned antennas from the antennas; calculating the signals of the concerned antennas pairwise to obtain a plurality of composite signals; and calculating a plurality of phase angles according to the synthesized signals so as to calculate a positioning angle by using the phase angles. In this way, a phase angle (i.e., a coarse angle) with low accuracy but only is used to perform a screening process among a plurality of phase angles with high accuracy to select the phase angle with the smallest included angle with the coarse angle, so as to find a high-accuracy positioning angle, thereby improving the positioning accuracy.)

1. A wireless apparatus, comprising:

an antenna module including a plurality of antennas, wherein each of the antennas is disposed around a reference point at equal intervals; and

a controller, coupled to the antenna module, for:

calculating a strength of a signal of each antenna to select a plurality of antennas of interest among the antennas;

calculating the signals of the concerned antennas pairwise to obtain a plurality of synthesized signals; and

a plurality of phase angles are calculated according to the synthesized signals, and a positioning angle is calculated by using the phase angles.

2. The wireless device of claim 1, wherein the antennas are grouped into a plurality of antenna pairs, and the reference point is located at a center of a line connecting each of the antenna pairs, wherein the controller is further configured to:

and determining the antenna with the strength larger in each antenna pair as the concerned antennas.

3. The wireless device of claim 1, wherein the distance between each two antennas of interest is a baseline length, wherein the controller is further configured to:

when the antennas of interest are consecutively adjacent, a maximum of the synthesized signals of the antennas of interest having the base length smaller than a threshold length is used to calculate a coarse angle, and the synthesized signals of the antennas of interest having the base length not smaller than the threshold length are used to calculate the phase angles.

4. The wireless device of claim 3, wherein the controller is further configured to:

adjusting the phase angles into a plurality of global angles according to an initial angle;

calculating a difference between the global angles and the rough angle respectively; and

outputting the global angle corresponding to the smallest one of the differences as the positioning angle.

5. The wireless device of claim 1, wherein the distance between each two antennas of interest is a baseline length, wherein the controller is further configured to:

when the antennas of interest are not consecutively adjacent, the combined signal of the antennas of interest having the base length not less than the threshold length is used to calculate the phase angles.

6. A positioning method adapted to a plurality of antennas disposed at equal intervals around a reference point, wherein the positioning method comprises:

calculating a strength of a signal of each antenna to select a plurality of antennas of interest among the antennas;

calculating the signals of the concerned antennas pairwise to obtain a plurality of synthesized signals; and

a plurality of phase angles are calculated according to the synthesized signals, and a positioning angle is calculated by using the phase angles.

7. The method of claim 6, wherein the antennas are grouped into a plurality of antenna pairs, and the reference point is located at a center of a connecting line of each of the antenna pairs, the method further comprising:

selecting the antenna with the greater strength of each of the antenna pairs as the antennas of interest.

8. The method of claim 6, wherein the distance between each of the antennas of interest is a baseline length, the method further comprising:

calculating a coarse angle using a largest of the synthesized signals of the antennas of interest having the base length less than a threshold length when the antennas of interest are consecutively adjacent; and

calculating the phase angles using the composite signal of the antennas of interest having the base length not less than the threshold length.

9. The method of claim 8, further comprising:

adjusting the phase angles into a plurality of global angles according to an initial angle;

respectively calculating a difference value between the phase angles and the rough angle; and

outputting the phase angle corresponding to the smallest one of the differences as the positioning angle.

10. The method of claim 6, wherein the distance between each of the antennas of interest is a baseline length, the method further comprising:

when the antennas of interest are not consecutively adjacent, the combined signal of the antennas of interest having the base length not less than the threshold length is used to calculate the phase angles.

Technical Field

The present disclosure relates to an antenna and a method for the antenna, and more particularly, to a positioning method for a wireless device using the antenna.

Background

Many indoor Location Based Service (LBS) technologies are provided in current wireless communication technologies, for example, technologies such as Wi-Fi, bluetooth, infrared, and ZigBee are used. For example, the base station may monitor the Signal Strength to determine the distance to the Signal source based on a Received Signal Strength Indication (RSSI). However, the distance measured by the RSSI technique has low accuracy and is easily interfered by environmental factors, which results in low accuracy.

On the other hand, indoor location-oriented services are affected by the antenna configuration. For example, if the antennas are arranged linearly, only the signal source of a specific direction can be measured, so that the positioning service is limited.

The current positioning technology still has a measurement problem, and in view of this, how to improve the accuracy is an urgent problem to be solved.

Disclosure of Invention

According to an embodiment of the present document, a wireless device is disclosed, the wireless device comprising an antenna module and a controller. The antenna module comprises a plurality of antennas, wherein each antenna is arranged around a datum point at equal intervals; calculating the signals of the concerned antennas pairwise to obtain a plurality of composite signals; and calculating a plurality of phase angles according to the synthesized signals so as to calculate a positioning angle by using the phase angles.

According to an embodiment, the controller is further configured to determine an antenna having a greater strength in each antenna pair as the antenna of interest.

According to an embodiment, wherein the distance between each two of the antennas of interest is a baseline length, wherein the controller is further configured to calculate a coarse angle using the largest of the composite signals of the antennas of interest having baseline lengths less than a threshold length when the antennas of interest are consecutively adjacent, and calculate the phase angles using the composite signals of the antennas of interest having baseline lengths not less than the threshold length.

According to an embodiment, the controller is further configured to adjust the phase angles to global angles according to an initial angle; respectively calculating a difference value between the global angles and the rough angles; and outputting the global angle corresponding to the minimum one of the differences as the positioning angle.

According to an embodiment, wherein the distance between each two of the antennas of interest is a baseline length, wherein the controller is further configured to calculate the phase angles using a composite signal of the antennas of interest having a baseline length not less than the threshold length when the antennas of interest are not consecutively adjacent.

According to another embodiment, a positioning method is disclosed for a plurality of antennas disposed circumferentially at equal intervals around a reference point. The positioning method comprises the following operations: selecting a plurality of concerned antennas from the antennas according to a signal strength of each antenna; calculating the signals of the concerned antennas pairwise to obtain a plurality of composite signals; and calculating a plurality of phase angles according to the synthesized signals so as to calculate a positioning angle by using the phase angles.

According to one embodiment, wherein the antennas form a plurality of antenna pairs, the reference point is located at the center of the connection line of each antenna pair, the positioning method further comprises selecting the antennas with greater strength in each antenna pair as the antennas of interest.

According to an embodiment, wherein the distance between each two of the antennas of interest is a baseline length, the positioning method further comprises calculating a coarse angle using the largest of the synthesized signals of the antennas of interest having baseline lengths less than a threshold length when the antennas of interest are consecutively adjacent, and calculating the phase angles using the synthesized signals of the antennas of interest having baseline lengths not less than the threshold length.

According to an embodiment, the positioning method further comprises adjusting the phase angles to global angles according to an initial angle; respectively calculating a difference value between the phase angles and the rough angle; and outputting the phase angle corresponding to the minimum one of the differences as the positioning angle.

According to an embodiment, wherein the distance between each two of the antennas of interest is a baseline length, the positioning method further comprises calculating the phase angles using a composite signal of the antennas of interest having a baseline length not less than the threshold length when the antennas of interest are not consecutively adjacent.

Drawings

The following detailed description is presented to facilitate a better understanding of aspects of the present document when read in conjunction with the appended drawings. It should be noted that the various features of the drawings are not necessarily drawn to scale and that, for clarity of discussion, the dimensions of the various features may be arbitrarily increased or reduced.

Fig. 1 is a functional block diagram of a wireless device according to some embodiments of the present disclosure.

FIG. 2 is a block diagram of a wireless device according to some embodiments of the present disclosure.

Fig. 3 is a flow chart illustrating the operation of a positioning method according to some embodiments of the present disclosure.

Fig. 4 is a schematic diagram of an antenna configuration operating in the positioning method of fig. 3 according to some embodiments of the present disclosure.

Fig. 5 is a schematic diagram of another antenna configuration operating in the positioning method of fig. 3 according to some embodiments of the present disclosure.

Detailed Description

The following disclosure provides many different embodiments, or examples, for implementing different features of this document. Specific examples of components and arrangements are described below to simplify the present document. Of course, these examples are merely illustrative and are not intended to be limiting.

Referring to fig. 1, a functional block diagram of a wireless device 100 according to an embodiment of the present disclosure is shown. The wireless device 100 includes an antenna module 110 and a controller 120. The antenna module 110 includes antennas 111a to 111 g. The antennas 111a to 111g are used for receiving radio frequency signals.

In some embodiments, the antenna module 110 further includes a switch 113 and a transceiver 115. The switch 113 is coupled to the antennas 111a to 111g and the transceiver 115. The switch 113 is used to receive signals from the antennas 111a to 111g in a switched manner, and these signals are transmitted to the controller 120 through the transceiver 115.

The controller 120 is coupled to the antenna module 110. In some embodiments, the controller 110 is configured to perform the positioning method of fig. 3, which will be described in detail later.

Referring to fig. 2, a functional block diagram of a wireless device 200 according to other embodiments of the present disclosure is shown. Elements of the wireless device 200 that are identical to the wireless device 100 of fig. 1 are identified by the same reference numerals, and only the differences will be described below.

As shown in fig. 2, the wireless device 200 includes an antenna module 210 and a controller 120. The antenna module 210 is coupled to the controller 120. The antenna module 210 includes antennas 111a to 111g and transceivers 215a to 215 f. The antenna 111a is coupled to the transceiver 215 a. The antenna 111b is coupled to the transceiver 215 b. The antenna 111c is coupled to the transceiver 215 c. The antenna 111d is coupled to the transceiver 215 d. The antenna 111e is coupled to the transceiver 215 e. The antenna 111f is coupled to the transceiver 215 f. The transceivers 215 a-215 f may simultaneously receive signals from the antennas 111 a-111 g so that the controller 120 may process multiple signals simultaneously.

It should be noted that the wireless device 100 of fig. 1 and the wireless device 200 of fig. 2 are illustrated with six antennas. In other embodiments, the number of antennas of the wireless devices 100 and 200 is equal to the number of sides of a regular polygon, such as three antennas, four antennas, eight antennas, ten antennas, twelve antennas, etc., and the document is not limited to six antennas.

Referring to fig. 3, a flow chart of operations of a positioning method 300 according to some embodiments of the present disclosure is shown. The positioning method 300 is suitable for the wireless device 100 and the wireless device 200 having a plurality of antennas arranged in a ring shape.

For clarity of describing the circular arrangement of the antennas, please refer to fig. 4, which illustrates an antenna configuration operating in the positioning method 300 of fig. 3 according to some embodiments of the present disclosure. The antenna configuration in fig. 4 is six circularly arranged antennas. The circular array is such that the antennas a1 to a6 are respectively disposed at the midpoints of six sides of the regular hexagon 400, based on the fact that the regular hexagon 400 includes six sides having a length λ/2 and the reference point O. Therefore, the antennas a1 to a6 are arranged in a ring shape at equal intervals around the reference point O.

Due to the characteristics of the regular hexagon 600, the base length between two adjacent antennas is 0.433 λ, that is, the base length of the antenna a1 and the antenna a2 (that is, the linear distance between the a1 and the antenna a 2), the base length of the antenna a2 and the antenna A3, the base length of the antenna A3 and the antenna a4, the base length of the antenna a4 and the antenna a5, the base length of the antenna a5 and the antenna A6, and the base length of the antenna a1 and the antenna A6 are 0.433 λ, respectively.

On the other hand, for antennas spaced one hop apart (one hop) the base length between them is 0.75 λ, for example the base lengths of antenna a1 and antenna A3 (i.e. the linear distance between a1 and antenna A3), antenna A3 and antenna a5, and antenna a1 and antenna a5 are 0.75 λ, respectively.

It is worth mentioning that in the characteristic of the base length of the antenna, in general, when the base length is less than 0.5 λ, the phase difference of the combined signal formed by the two antennas only contains a unique solution (unique phase angle) within the distance. On the other hand, when the base line length is not less than 0.5 λ, the phase difference of the combined signal formed by the two antennas contains a plurality of solutions (a plurality of phase angles). In fig. 4, the antennas a 1-a 6 are configured such that the base length is less than 0.5 λ, so that a unique phase angle can be calculated based on the resultant signal from two adjacent antennas.

The following describes various operations of the positioning method 300 of fig. 3 performed by the controller 120 of fig. 1 and 2 with the antenna configuration of fig. 4.

In operation S310, the controller 120 receives signals of the plurality of antennas a1 to a6 and calculates the strength of the signals of the pair of antennas a1 to a6, which are two by two with respect to the reference point O. For example, the three antenna pairs relative to the reference point O are antenna a1 and antenna a4, antenna a2 and antenna a5, antenna A3 and antenna a 6. After the controller 120 receives the signals of the antennas, the intensity of the signals is calculated according to formula 1 and formula 2:

Strength＝Amplitude²resistance … (equation 2)

In equation 1, I is a real part signal of the antenna, and Q is an imaginary part signal of the antenna. In equation 2, Amplitude is the Amplitude calculated in equation 1, and Resistance is the impedance value of the antenna. In some embodiments, the controller 120 may refer to a lookup table according to the I value and the Q value to obtain the amplitude of equation 1. Thus, the calculation cost of calculating the amplitude can be reduced by using the table look-up method.

After calculating the signal strengths of the antennas a1 to a6, the controller 120 determines an antenna having a greater signal strength among the antenna pairs as the antenna of interest, respectively, in operation S320. In some embodiments, the stronger of the signals from antenna a1 and antenna a4 is antenna a1, the stronger of the signals from antenna a2 and antenna a5 is antenna a2, and the stronger of the signals from antenna A3 and antenna a6 is antenna A3. Thus, antenna a1, antenna a2, and antenna A3 are the three antennas of interest. That is, the controller 120 can thus preliminarily determine that the signal source is on the side near the antennas A1-A3. In the subsequent signal processing, only the signal of the antenna of interest may be processed. Therefore, unnecessary signal operation processing can be reduced, and the positioning speed is improved.

In operation S330, the controller 120 determines whether the antennas of interest are consecutive neighboring antennas. For example, the antennas A1-A3 are consecutive adjacent antennas among the equidistant and annularly arranged antennas A1-A6.

If it is determined that the antennas a1 to A3 are adjacent antennas in operation S330, the controller 120 calculates a signal of the antenna of interest two by two to obtain a plurality of combined signals in operation S340. For example, the controller 120 calculates the amplitudes of the combined signals of the two antennas of interest according to equations 3-4:

Strength_AiAj＝Amplitude_AiAj ²resistance … (equation 4)

In equation 3, Amplified_AiAjThe combined amplitude for the two antennas Ai and Aj of interest.

In equation 4, Strength_AiAjAccording to the synthesized Amplitude_AiAjThe resulting intensity is calculated. In some embodiments, the controller 120 may refer to a lookup table according to the I value and the Q value to obtain the amplitude of equation 3.

For example, the controller 120 calculates the combined Amplitude of the combined signals of the antenna a1 and the antenna a2 by using formula 3_A1A2The combined Amplitude of the combined signal of antenna A2 and antenna A3_A2A3And the combined Amplitude of the combined signal of antenna A1 and antenna A3_A1A3. Then, the intensity Strength of each synthesized signal is calculated by formula 4_A1A2、Strength_A2A3And Strength_A1A3。

Next, the controller 120 calculates a phase difference and a phase angle of the combined signal of the two antennas of interest according to equations 5 to 6:

in equation 5, Phase_AiAjIs the phase difference of the combined signals of the two antennas Ai and Aj of interest. In some embodiments, the controller 120 may refer to a lookup table according to the I value and the Q value to obtain the phase difference of formula 5.

In equation 6, Angle_AiAjIs a phase angle calculated from the phase difference of the composite signal. Where λ is the wavelength and d is the length of the base line between the antennas. In some embodiments, the controller 120 may refer to a look-up table according to the phase difference to obtain the phase angle of equation 6. It should be noted that the above-mentioned related formulas are only exemplary and are not intended to limit the implementation manner of the present disclosure, and those skilled in the art can modify and change the calculation manner and/or parameter values of the related formulas according to the requirement to meet the actual situation.

In operation S350, when the controller 120 determines that the antenna of interest is a consecutive adjacent antenna, a coarse angle is calculated using the largest of the combined signals of the antennas of interest according to the antenna of interest having a base length smaller than the threshold length. For example, the baseline length between antennas a1 and a2 of interest is 0.477 λ, the baseline length between antennas a2 and A3 of interest is 0.477 λ, and the baseline length between antennas a1 and A3 of interest is 0.75 λ. In one embodiment, the threshold length is 0.5 λ. The controller 120 calculates the coarse angle from the combined signal of the antennas of interest a1 and a2 and the combined signal of the antennas of interest a2 and A3, whose base length is smaller than the threshold length.

When the controller 120 performs operation S350, in some embodiments, when it is determined that the signal strength of the combined signal of the antenna a1 and the antenna a2 is greater than the signal strength of the combined signal of the antenna a2 and the antenna A3, a phase angle is calculated using the phase difference of the combined signal of the antenna a1 and the antenna a2, and the phase angle is taken as a coarse angle. In other embodiments, when it is determined that the signal strength of the combined signal of antenna a2 and antenna A3 is greater than the signal strength of the combined signal of antenna a1 and antenna a2, the phase angle is calculated using the phase difference of the combined signal of antenna a2 and antenna A3, and the phase angle is taken as the coarse angle.

In operation S360, the controller 120 calculates a plurality of phase angles using the synthesized signal of the antenna of interest and adjusts the phase angles to a plurality of global angles according to an initial angle. In some embodiments, as shown in fig. 4, normal vector N12 is the perpendicular vector to the baseline of antenna a1 and antenna a2, normal vector N22 is the perpendicular vector to the baseline of antenna a2 and antenna A3, and normal vector N13 is the perpendicular vector to the baseline of antenna a1 and antenna A3. Since the distance and position between the antennas A1-A6 are known parameters, the global angle can be obtained by setting the initial angle of one of the synthesized vectors and calculating the angles of the other synthesized vectors by the relative angles.

For example, the controller 120 regards the combined signal of the antenna a1 and the antenna a2 as an initial angle (e.g., 0 °) of the top view plane, so the adjusted angle is a global angle θ +0 °, where θ is an angle between a normal vector of a baseline of each antenna and a line of sight (line of sight). The combined signal of the antenna a1 and the antenna A3 is subjected to angle adjustment of θ 1, and then the global angle θ + θ 1 is obtained. The combined signal of the antenna a2 and the antenna A3 is subjected to angle adjustment of θ 2, and then the global angle θ + θ 2 is obtained. In some embodiments, θ 1 is 30 ° and θ 2 is 60 °. In this way, the angle of the phase angle of each antenna signal can be adjusted to the same coordinate system, thereby completing the angle normalization.

It should be noted that, in one embodiment, the base length 0.75 λ of the antenna a1 and the antenna A3 is greater than 0.5 λ, so that a plurality of phase angles can be calculated from the combined signal of the antenna a1 and the antenna A3 with the larger base length, so as to obtain a plurality of global angles of the combined signal of the antenna a1 and the antenna A3 in this operation.

In operation S370, the controller 120 calculates differences between the global angles and the coarse angles of the synthesized signals, and outputs the global angle corresponding to the smallest one of the differences as the positioning angle. For example, as described above, a plurality of global angles may be calculated from the combined signals of antenna A1 and antenna A3. If the controller 120 determines that the signal strength of the combined signal of the antenna a1 and the antenna a2 is greater than the signal strength of the combined signal of the antenna a2 and the antenna A3, the phase angle of the antenna a1 and the antenna a2 is used as a coarse angle, and the coarse angles are subtracted from all the angles of the antenna a1 and the antenna A3 to obtain a plurality of difference values. In another embodiment, the differences are obtained by calculating the differences between the global angles of antenna a1 and antenna a2 and the global angles of antenna a1 and antenna A3, respectively. Then, the smallest difference is determined, or the difference smaller than the predetermined threshold is determined, so as to obtain the global angle closest to the coarse angle.

In an embodiment, the difference may be a difference between two values or an absolute value of the difference. Therefore, the present document obtains the angle really closest to the signal source among the global angles by finding the minimum angle difference. For this embodiment, the present document first calculates a plurality of global angles of the combined signal of the antenna a1 and the antenna A3 with longer base lengths, and then selects the most accurate signal source angle from these global angles by using the combined signal of the antenna a1 and the antenna a2 with higher signal strength.

Referring back to operation S330, if it is determined in operation S330 that the antenna of interest is not a continuously adjacent antenna, operation S380 is performed. In operation S380, the controller 120 calculates the signal of the antenna of interest two by two to obtain a plurality of synthesized signals, and calculates a plurality of phase angles as positioning angles using the synthesized signal of the antenna of interest, as described below.

Referring back to fig. 4, in some embodiments, if the antennas of interest are the antenna a1, the antenna A3, and the antenna a5 in operation S330. Next, the strength of the combined signal of the antenna a1 and the antenna A3, the strength of the combined signal of the antenna A3 and the antenna a5, and the strength of the combined signal of the antenna a1 and the antenna a5 are calculated using the above equations 3 to 4, respectively. The phase angle of the combined signal of the antenna a1 and the antenna A3, the phase angle of the combined signal of the antenna A3 and the antenna a5, and the phase angle of the combined signal of the antenna a1 and the antenna a5 are calculated using the above equations 5 to 6, respectively. The controller 120 finds the one with the largest signal strength among the synthesized signals. For example, the combined signal of antenna A3 and antenna a5 has the greatest signal strength.

In this embodiment, since the base lengths of the antennas a1 and A3, A3 and a5, and a1 and a5 are all 0.75 λ (greater than the threshold length by 0.5 λ), the controller cannot calculate a unique phase angle from the combined signal of the antennas a1 and A3, the combined signal of the antennas A3 and a5, and the combined signal of the antennas a1 and a 5. Therefore, after the controller 120 finds the synthesized signal with larger signal intensity, it calculates a plurality of phase angles as the positioning angles according to the synthesized signal. For example, the plurality of phase angles obtained from the combined signal of the antenna A3 and the antenna a5 are used as the positioning angles.

It should be noted that in operation S380, since the coarse angle is not calculated and the plurality of phase angles are not filtered, the angle normalization is not required to be performed on the plurality of phase angles, but the plurality of phase angles are directly used as the positioning angles.

That is, in operation S330, it is determined whether the antenna of interest is a continuously adjacent antenna, and the difference in the subsequent operations is that in the case where the antenna of interest is continuously adjacent, there is a portion of the baseline length not exceeding 0.5 λ, and a unique phase angle can be calculated as a coarse angle, and the coarse angle can be filtered and screened among a plurality of phase angles of another synthesized signal to obtain a phase angle with the smallest included angle with the coarse angle.

In the embodiment of fig. 4, the base lengths of antennas a1 and a2 are 0.433 λ, and the base lengths of antennas a1 and A3 are 0.75 λ, which are mutually incompatible (non-harmonic), non-integer-multiple (non-integer-multiple), and coprime (co-prime). Therefore, the filter can be filtered among a plurality of (more accurate) phase angles according to the (less accurate) coarse angle to output a phase angle of high accuracy.

Please refer to fig. 5. Fig. 5 is a schematic diagram of another antenna configuration operating in the positioning method 300 of fig. 3 according to some embodiments of the present disclosure. As shown in fig. 5, the antenna configuration in fig. 5 is four antennas arranged in a loop. The regular quadrilateral 500 comprises four sides of length λ/2. The antennas a1 to a4 are respectively disposed at the midpoints of the four sides of the regular quadrangle 500. Therefore, the antennas a1 to a4 are arranged in a ring shape at equal intervals around the reference point O. Due to the characteristics of the regular quadrilateral 500, the length of the base of antenna a1 and antenna a2 (i.e., the length of the side between a1 and antenna a 2), the length of the base of antenna a2 and antenna A3 (i.e., the length of the side between a2 and antenna A3), the length of the base of antenna A3 and antenna a4 (i.e., the length of the side between A3 and antenna a 4), and the length of the base of antenna a1 and antenna a4 (i.e., the length of the side between a1 and antenna a 4) are 0.3536 λ.

In the embodiment of fig. 5, when the positioning method 300 is performed by using the signals from the antennas a 1-a 4, the antenna of interest is necessarily two adjacent antennas in operation S330, for example, when the signal strength of the antenna a1 is greater than the signal strength of the antenna A3 and the signal strength of the antenna a2 is greater than the signal strength of the antenna a4 in operation S310 and operation S320, the antennas of interest are the antenna a1 and the antenna a 2. In some embodiments, when the global angle is adjusted in operation S360, in the configuration of the square 500, θ 1 is used as an angle of 45 °, and θ 2 is used as an angle of 90 °. Then, similarly to the above, the positioning angle can be obtained by performing operations S340 to S370. For the related description, please refer to the above description, which is not repeated herein.

This document describes, as examples, a regular quadrilateral antenna configuration (see fig. 5) and a regular hexagonal antenna configuration (see fig. 4). However, the present document is not limited to these aspects, and any regular polygonal antenna configuration is within the scope of the present document.

Thus, the wireless apparatuses 100 and 200 and the positioning method 300 proposed in this document can simultaneously solve the technical problems that although a unique phase angle can be obtained when the inter-antenna baseline length is less than 0.5 λ, the positioning accuracy is low, and when the inter-antenna baseline length is not less than 0.5 λ, a plurality of phase angles are generated although the positioning accuracy is high. That is, the present document uses a phase angle (i.e., a coarse angle) with low accuracy but only, and performs a screening among a plurality of phase angles with high accuracy to select the phase angle with the smallest included angle with the coarse angle, so as to find a positioning angle with high accuracy and improve the positioning accuracy.

The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that this document may be readily utilized as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of this document, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of this document.