A method, device and apparatus for measuring signal arrival angle based on array antenna

Abstract

The present invention provides a method, device, and apparatus for measuring the signal arrival angle based on an array antenna. The method comprises: obtaining the value of the signal arrival angle of the signal to be measured for the nth measurement; determining a target value of the signal arrival angle for the n+1th measurement based on the value of the signal arrival angle for the nth measurement and the predicted value of the signal arrival angle for the n+1th measurement; the product of the signal frequency of the n+1th measurement and the antenna array spacing is greater than the product of the signal frequency of the nth measurement and the antenna array spacing, where n is a positive integer greater than or equal to 1, and the value of the signal arrival angle is related to the product of the signal frequency of the signal to be measured and the antenna array spacing. The solution of the present invention can achieve higher-precision arrival angle measurement, thereby improving the positioning accuracy based on the arrival angle measurement method.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a method, device and equipment for measuring the signal arrival angle based on an array antenna. Background Art

[0002] With the rapid development of the positioning market and demand, the demand for precise positioning services has exploded in recent years. To address this, signal arrival angle measurement technology provides a technical solution for precise positioning. By measuring the angle of arrival of the signal, the position of the device under test relative to the base station receiving the signal can be determined. This can be achieved by measuring multiple base stations or combining signal power measurements to determine the device's position.

[0003] Current positioning solutions based on angle-of-arrival measurement often use a matrix or ring design for base station receiving antennas, with switches periodically polling the antenna array. Because signals arrive at the antennas at specific angles of arrival and travel different distances to each antenna, the signals received by each antenna have the same frequency but different phases. The phase difference between signals received by adjacent antennas can be used to determine the distance difference between the signals reaching adjacent antennas, and the known antenna spacing can be used to determine the angle of arrival. The DUT's location is then determined through multi-base station joint positioning or by combining signal power measurements to achieve accurate positioning. Current solutions use fixed-frequency signals. To ensure that the base station can receive and calculate the angle of arrival within a certain range, the antenna spacing is designed to meet this requirement. The design of this receiving system does not consider reception accuracy, either in terms of the array antenna assembly or the measurement method.

[0004] The disadvantage of existing technology is that adjacent antenna arrays are spaced identically during measurement, and the signal frequency is the same. Therefore, the accuracy of the angle of arrival measurement and the angle of coverage are fixed (pre-designed) and mutually constrained. Therefore, the accuracy of the angle of arrival measurement is inherently limited, and positioning accuracy is subsequently limited by the accuracy of the angle of arrival measurement. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to provide a method, device and equipment for measuring the signal arrival angle based on an array antenna, which can achieve higher-precision arrival angle measurement and thus improve the positioning accuracy based on the arrival angle measurement method.

[0006] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0007] A method for measuring a signal arrival angle based on an array antenna, comprising:

[0008] Get the value of the signal arrival angle of the nth measurement of the signal to be measured;

[0009] Based on the value of the signal arrival angle measured for the nth time and the predicted value of the signal arrival angle measured for the n+1th time, the target value of the signal arrival angle measured for the n+1th time is determined; the product of the signal frequency measured for the n+1th time and the antenna array spacing is greater than the product of the signal frequency measured for the nth time and the antenna array spacing, n is a positive integer greater than or equal to 1, and the value of the signal arrival angle is related to the product of the signal frequency of the signal to be measured and the antenna array spacing.

[0010] Optionally, the product of the signal frequency and the antenna array spacing is f·L, where f is the signal frequency and L is the antenna array spacing.

[0011] Optionally, the product of the nth measured signal frequency and the antenna array spacing f n ·L n and the signal frequency and antenna array spacing value f measured at the n+1th time m ·L m Satisfy: (f m ·L m ) / (f n ·L n ) is less than Δα max / Δα min ;

[0012] Among them, Δα max When measuring for the n+1th time, the maximum arrival angle α can be measured; Δα min is the error of the signal arrival angle α of the nth signal to be measured.

[0013] Optionally, the signal arrival angle α is determined by the following relationship:

[0014]

[0015] in,

[0016] Where Δd is the distance difference between the measured signal and the antenna of the measuring device, λ = c / f, c is the speed of light, f is the frequency of the measured signal, and the phase difference of the measured signal is The range is By measuring, and are the phase values ​​of the arrival angles reaching the two antennas respectively.

[0017] An embodiment of the present invention further provides a device for measuring the angle of arrival of a signal based on an array antenna, comprising:

[0018] An acquisition module is used to obtain the value of the signal arrival angle of the nth measurement of the signal to be measured;

[0019] A processing module, configured to determine a target value of the signal arrival angle for an n+1th measurement based on the value of the signal arrival angle measured for the nth time and the predicted value of the signal arrival angle for the n+1th measurement; the product of the signal frequency of the n+1th measurement and the antenna array spacing is greater than the product of the signal frequency of the nth measurement and the antenna array spacing, where n is a positive integer greater than or equal to 1, and the value of the signal arrival angle is related to the product of the signal frequency of the signal to be measured and the antenna array spacing.

[0020] Optionally, the product of the signal frequency and the antenna array spacing is f·L, where f is the signal frequency and L is the antenna array spacing.

[0021] Optionally, the product of the nth measured signal frequency and the antenna array spacing f n ·L n and the signal frequency and antenna array spacing value f measured at the n+1th time m ·L m Satisfy: (f m ·L m ) / (f n ·L n ) is less than Δα max / Δα min ;

[0022] Among them, Δα max When measuring for the n+1th time, the maximum arrival angle α can be measured; Δα min is the error of the signal arrival angle α of the nth signal to be measured.

[0023] Optionally, the signal arrival angle α is determined by the following relationship:

[0024]

[0025] in,

[0026] Where Δd is the distance difference between the measured signal and the antenna of the measuring device, λ = c / f, c is the speed of light, f is the frequency of the measured signal, and the phase difference of the measured signal is The range is By measuring, and are the phase values ​​of the arrival angles reaching the two antennas respectively.

[0027] An embodiment of the present invention further provides a device for measuring the angle of arrival of a signal based on an array antenna, comprising:

[0028] Multi-frequency antenna array to receive incoming signals;

[0029] A radio frequency transceiver unit, used to convert the received signal into a baseband signal and sample the baseband signal to obtain the phase information of the signal; and the measuring device for the array antenna angle information as described above.

[0030] An embodiment of the present invention further provides a computer-readable storage medium storing instructions, which, when executed on a computer, causes the computer to execute the method described above.

[0031] The above solution of the present invention includes at least the following beneficial effects:

[0032] By obtaining the value of the signal arrival angle of the signal to be measured for the nth measurement; determining a target value of the signal arrival angle for the n+1th measurement based on the value of the signal arrival angle of the nth measurement and the predicted value of the signal arrival angle for the n+1th measurement; wherein the product of the signal frequency of the n+1th measurement and the antenna array spacing is greater than the product of the signal frequency of the nth measurement and the antenna array spacing, where n is a positive integer greater than or equal to 1, and the signal arrival angle value is related to the product of the signal frequency of the signal to be measured and the antenna array spacing, a more accurate arrival angle measurement can be achieved, thereby improving the positioning accuracy based on the arrival angle measurement method. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 1 is a flow chart of a method for measuring angle information of an array antenna according to an embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of a device for measuring angle information of an array antenna according to an embodiment of the present invention;

[0035] Figure 3 is a schematic diagram of a joint test according to an embodiment of the present invention;

[0036] Figure 4 This is a multi-frequency antenna model according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] like Figure 1 As shown, an embodiment of the present invention provides a method for measuring the signal arrival angle based on an array antenna, comprising:

[0039] Step 11, obtaining the value of the signal arrival angle of the nth measurement of the signal to be measured;

[0040] Step 12: Determine a target value of the signal arrival angle for the n+1th measurement based on the value of the signal arrival angle measured for the nth time and the predicted value of the signal arrival angle measured for the n+1th time; the product of the signal frequency of the n+1th measurement and the antenna array spacing is greater than the product of the signal frequency of the nth measurement and the antenna array spacing, n is a positive integer greater than or equal to 1, and the value of the signal arrival angle is related to the product of the signal frequency of the signal to be measured and the antenna array spacing.

[0041] This embodiment adopts a method of jointly measuring multiple sets of signal frequencies and antenna array spacing values ​​to solve the problem of being unable to achieve both coverage and measurement accuracy. It can achieve higher-precision arrival angle measurement, thereby improving the positioning accuracy based on the arrival angle measurement method.

[0042] In an optional embodiment of the present invention, the product of the signal frequency and the antenna element spacing is f·L, where f is the signal frequency and L is the antenna element spacing.

[0043] In an optional embodiment of the present invention, the product of the nth measured signal frequency and the antenna array spacing f n ·L n and the signal frequency and antenna array spacing value f measured at the n+1th time m ·L m Satisfy: (f m ·L m ) / (f n ·L n ) is less than Δα max / Δα min ;

[0044] Among them, Δα max When measuring for the n+1th time, the maximum arrival angle α can be measured; Δα min is the error of the signal arrival angle α of the nth signal to be measured.

[0045] The signal arrival angle α is determined by the following relationship:

[0046]

[0047] in,

[0048] Where Δd is the distance difference between the measured signal and the antenna of the measuring device, λ = c / f, c is the speed of light, f is the frequency of the measured signal, and the phase difference of the measured signal is The range is By measuring, and are the phase values ​​of the arrival angles reaching the two antennas respectively.

[0049] like Figure 2 The figure shows a schematic diagram of the arrival angle measurement device in the above embodiment of the present invention. The signal to be measured arrives at the antenna of the measurement device at an angle α. The distance difference between the signal to be measured and the antenna of the measurement device is Δd. The distance between the antennas is L. Δd can be calculated by the phase difference of the signal to be measured received by different antenna elements. Sure:

[0050]

[0051]

[0052] Where λ is the wavelength of the signal; the measured signals received by different antenna elements pass through the RF transceiver unit and are calculated by the data analysis and processing unit to obtain

[0053] Therefore, the arrival angle can be obtained through the trigonometric function relationship:

[0054]

[0055] Substitute λ = c / f, where c is the speed of light and f is the frequency of the signal to be measured.

[0056] Due to the phase difference If it exceeds 2π, period ambiguity will occur, so the phase difference of the signal to be measured The range is selected as when When it is ±π, it is the maximum arrival angle α of the signal to be measured that can be measured max , that is, the coverage angle.

[0057] Regarding coverage: According to the formula, in order to increase the coverage angle of the signal to be measured, this can be achieved by reducing the f·L value, that is, lowering the frequency of the signal to be measured and reducing the antenna spacing.

[0058] The formula can be expressed as:

[0059]

[0060] where f L and L L For a set of signal frequencies and antenna spacing, the smaller the value, the larger the coverage angle. In other words, when f·L is reduced to a certain value, the coverage angle required by the measurement system can be met.

[0061] About measurement accuracy (error): At the same time, due to the influence of phase noise and system error, the measured phase difference There is a certain error that cannot be eliminated, that is, there is a measurement accuracy The arrival angle of the signal to be measured is extrapolated to the arrival angle of the signal to be measured. The arrival angle of the signal to be measured also has a measurement accuracy αmin According to the formula, in order to improve the arrival angle measurement accuracy of the signal to be measured, it can be achieved by increasing the f·L value, that is, increasing the frequency of the signal to be measured and increasing the antenna spacing.

[0062] The formula can be expressed as:

[0063] where f H and L H It is a set of signal frequency and antenna spacing selections. The larger the selection, the higher the measurement accuracy.

[0064] In the embodiment of the present invention, the frequency and the antenna distance, that is, the f·L value, are changed and several measurements are performed, each time the f·L value is gradually increased from small to large.

[0065] Except for the first measurement, each measurement is a joint measurement with the previous measurement (or multiple measurements), that is, the output of each measurement result needs to be assisted by the results of the previous measurement (or multiple measurements).

[0066] Joint measurement is used because, except for the first measurement, none of the remaining measurements can independently meet the required coverage angle of the measurement system. Phase ambiguity results in multiple values ​​of the angle of incidence α at the required coverage angle. Therefore, the second measurement must use the results of the first measurement to determine the true solution from the multiple values ​​of the angle of incidence α obtained from the second measurement. The same principle applies to subsequent measurements.

[0067] At the same time, in order to ensure that the accuracy error of each measurement will not be introduced into the next measurement, the multiple of increasing the f·L value each time should be limited. Assume that the nth measurement selects f n ·L n , select f for the n+1th measurement m ·L m , then (f m ·L m ) / (f n ·L n ) should be less than Δα max / Δα min .

[0068] Through this test process, the impact of measurement system errors can be significantly reduced and the arrival angle measurement accuracy can be improved.

[0069] In a specific embodiment, the specific process includes:

[0070] First measurement: The measurement with the lowest f·L value satisfies the required measurement coverage angle. This measurement is also called a coarse measurement. The first measurement determines the signal arrival angle α1. Figure 3 The solid line 31 represents the measurement result and the error 34 .

[0071] Then, gradually increase the f·L value and gradually improve the arrival angle measurement accuracy through several measurements, which can also be called fine measurement. Due to the increase in the f·L value, the measurement will have a phase 2π ambiguity under the current coverage width, that is, it is impossible to determine the signal arrival angle corresponding to the measured phase difference, such as Figure 3 For the center line 32, when the measured phase difference is 90 degrees, there are multiple results (-50, -20, 10, 40) when the signal arrival angle is between -60 and 60, so the first measurement result is needed for auxiliary solution. (For example Figure 3 In the first solution, the arrival angle is in the range of -15 to -25, so the result of -20 is accurate. By this method, each measurement can obtain a more accurate arrival angle α based on the previous measurement. n (such as line 33), it can be seen from the above formula that while ensuring the measurement coverage angle, the phase difference error can be reduced (f H ·L H ) / (f L ·L L ) times. Figure 3 The center line 32 and the measurement results and errors are shown as line 33 .

[0072] At the same time, in order to ensure that the accuracy error of each measurement will not be introduced into the next measurement, the multiple of increasing the f·L value each time should be limited. Assume that the nth measurement selects f n ·L n , select f for the n+1th measurement m ·L m , then (f m ·L m ) / (f n ·L n ) should be less than Δα max / Δα min .

[0073] For example Figure 3 As shown, the system design process is as follows:

[0074] The first measurement needs to ensure that the antenna can guarantee the required measurement angle. That is, it is necessary to select the lowest signal frequency and antenna array spacing. The result after completing the measurement is Figure 3 The center line 31 shows the spacing between antenna elements. The spacing between antenna elements is designed based on the frequency of the signal used and the coverage required by the system (generally 60 degrees, ±1 / 3π).

[0075] For example, using Wi-Fi signals as an example, the lowest frequency is 2.4 GHz. Therefore, calculations show that the antenna array spacing required to ensure coverage is 7.2 cm. Signal phase noise and system errors can cause a maximum error of 10 degrees in phase difference measurement. The maximum angle of arrival error is 5 degrees, with a minimum error of 2.75 degrees.

[0076] The next measurement will improve the measurement accuracy by increasing the f·L value. At the same time, it is necessary to ensure that the accuracy error of each measurement will not be introduced into the next measurement, so the multiple of increasing the f·L value each time should be limited. Assume that the nth measurement selects f n ·L n , select f for the n+1th measurement m ·L m , then (f m ·L m ) / (f n ·L n ) should be less than Δα max / Δα min .

[0077] Continued example: The second measurement uses the Wi-Fi frequency of 5.8GHz and the antenna array spacing is still 7.2cm. m ·L m ) / (f n ·L n ) is less than Δα max / Δα min Under these conditions, the arrival angle measurement error is reduced by a factor of two. (You can also use a fixed frequency to change the antenna array spacing or change the frequency and antenna array spacing simultaneously.)

[0078] Repeat the second step until the required accuracy is met.

[0079] There are two simplified schemes for this scheme: 1. Fix the antenna spacing L and use multiple sets of signal frequencies f for joint measurement; 2. Fix the signal frequency f and use multiple antenna spacings L for measurement.

[0080] The following are examples:

[0081] Specific embodiment 1 (fixed antenna distance L, using two sets of different frequency signals):

[0082] The fixed antenna spacing is 7.2 cm, the first group of signal frequencies are 2.4 GHz, and the second group of signal frequencies are 5.8 GHz.

[0083] First, measuring at 2.4 GHz ensures that the arrival signal can be measured within ±60 degrees. Assuming that the phase difference measurement has a maximum error of 10 degrees due to signal phase noise and system errors, the maximum arrival angle error is 5 degrees, and the minimum error is 2.75 degrees.

[0084] Next, we measured the 5.8 GHz signal. Assuming the signal's phase noise and system errors remained consistent, the maximum phase difference was 10 degrees. The resulting maximum angle of arrival error was approximately 1.22 degrees, with a minimum error of 1.15 degrees.

[0085] Through the dual-frequency measurement solution, the arrival angle error is reduced by 2.25-4.35 times.

[0086] Specific embodiment 2 (fixed measurement signal frequency, using multiple groups of different antenna spacings):

[0087] The test signal frequency is 2.4 GHz. Eight antenna elements form a circular antenna array. The spacing between adjacent antenna elements is 7.2 cm. The spacing between diagonal antenna elements is 18.8 cm.

[0088] First, measurements are performed using adjacent antenna elements to ensure that the arrival signal can be measured within ±60 degrees. Assume that phase noise and system errors can cause a maximum error of 10 degrees in the phase difference measurement. The maximum angle of arrival error is 5 degrees, and the minimum error is 2.75 degrees.

[0089] Next, we measured the diagonal antenna array. Assuming the signal phase noise and system errors remained the same as the previous measurement, the maximum phase difference was 10 degrees. The maximum error in the final angle of arrival was approximately 1.11 degrees, and the minimum error was 1.06 degrees.

[0090] With this measurement scheme, the arrival angle error is reduced by 2.48-4.7 times.

[0091] Specific embodiment 3 (multi-frequency and multi-antenna spacing)

[0092] Eight antenna elements form a circular antenna array. Adjacent antenna elements are spaced 7.2 cm apart. Diagonal antenna elements are spaced 18.8 cm apart. The lowest frequency signal is 2.4 GHz, and the highest is 24 GHz.

[0093] To ensure coverage, the initial measurement uses adjacent antenna arrays and a 2.4 GHz signal. For maximum accuracy, diagonal antenna arrays and a 24 GHz signal are used. Assume that phase noise and system errors can cause a maximum error of 10 degrees in the phase difference measurement. Therefore, an additional measurement is required to ensure that the error is not transferred. Therefore, a 5.8 GHz signal and a diagonal antenna array are selected as the intermediate transition measurement.

[0094] First, by measuring adjacent antenna elements and 2.4GHz signals, we can ensure that the arrival signal can be measured within ±60 degrees. The maximum arrival angle error is 5 degrees and the minimum error is 2.75 degrees.

[0095] Then, measurements are taken using 5.8GHz signals and diagonal antenna arrays to narrow the signal arrival angle range.

[0096] Finally, measurements using a 24GHz signal and diagonal antenna arrays revealed a maximum angle of arrival error of 0.036 degrees and a minimum error of 0.035 degrees. This solution reduces angle of arrival error by 76.4-142 times.

[0097] An embodiment of the present invention further provides a device for measuring the angle of arrival of a signal based on an array antenna, comprising:

[0098] An acquisition module is used to obtain the value of the signal arrival angle of the nth measurement of the signal to be measured;

[0099] A processing module, configured to determine a target value of the signal arrival angle for an n+1th measurement based on the value of the signal arrival angle measured for the nth time and the predicted value of the signal arrival angle for the n+1th measurement; the product of the signal frequency of the n+1th measurement and the antenna array spacing is greater than the product of the signal frequency of the nth measurement and the antenna array spacing, where n is a positive integer greater than or equal to 1, and the value of the signal arrival angle is related to the product of the signal frequency of the signal to be measured and the antenna array spacing.

[0100] Optionally, the product of the signal frequency and the antenna array spacing is f·L, where f is the signal frequency and L is the antenna array spacing.

[0101] Optionally, the product of the nth measured signal frequency and the antenna array spacing f n ·L n and the signal frequency and antenna array spacing value f measured at the n+1th time m ·L m Satisfy: (f m ·L m ) / (f n ·L n ) is less than Δα max / Δα min ;

[0102] Among them, Δα max When measuring for the n+1th time, the maximum arrival angle α can be measured; Δα min is the error of the signal arrival angle α of the nth signal to be measured.

[0103] Optionally, the signal arrival angle α is determined by the following relationship:

[0104]

[0105] in,

[0106] Where Δd is the distance difference between the measured signal and the antenna of the measuring device, λ = c / f, c is the speed of light, f is the frequency of the measured signal, and the phase difference of the measured signal is The range is By measuring, and are the phase values ​​of the arrival angles reaching the two antennas respectively.

[0107] It should be noted that the device is a device corresponding to the above method, and all implementation methods of the above method embodiments are applicable to the embodiments of the device and can achieve the same technical effects.

[0108] like Figure 2 and Figure 4 As shown, an embodiment of the present invention further provides a device for measuring angle information of an array antenna, comprising:

[0109] Multi-frequency antenna array to receive incoming signals;

[0110] A radio frequency transceiver unit, used to convert the received signal into a baseband signal and sample the baseband signal to obtain the phase information of the signal; and the measuring device for the array antenna angle information as described above.

[0111] A multi-frequency antenna array consists of multi-frequency antenna elements with one or more spacings between them. The antenna array receives incoming signals. To achieve multi-frequency Bluetooth antennas, multiple resonant frequencies must be introduced. Common methods include resonant branching, frequency doubling, and parasitic branching.

[0112] The resonant branch method designs multiple oscillator branches on the same antenna, each branch corresponds to a working frequency band;

[0113] The frequency doubling method realizes multiple frequency bands in one branch. It mainly uses the harmonic principle to generate resonance points near the odd harmonic points of the fundamental frequency. The idea of ​​the parasitic branch method is to generate high-frequency resonance points by adding short-circuited coupling branches near the antenna.

[0114] The following embodiment provides a multi-frequency antenna designed using the resonant branch method. Two sets of dual-frequency resonant dipole branches are designed based on the traditional PCB printed dipole antenna. The wide dipole is responsible for radiating high-frequency signals, and the narrow dipole is responsible for radiating low-frequency signals.

[0115] RF transceiver unit: down-converts the received signal to a baseband signal and samples the signal to collect the phase information of the arriving signal;

[0116] Data analysis and processing unit: processes and analyzes the phase information of the collected arrival angle signal to calculate the arrival angle of the signal.

[0117] The above embodiments of the present invention cannot improve the accuracy under a certain measurement coverage angle. The application proposal can significantly improve the measurement accuracy under a certain measurement coverage angle by combining multiple frequencies and multiple antenna spacings.

[0118] An embodiment of the present invention further provides a computer-readable storage medium comprising instructions, which, when executed on a computer, cause the computer to execute the method described above. All implementations in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0119] Those skilled in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0120] Those skilled in the art will 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.

[0121] In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0122] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0123] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0124] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, ROM, RAM, a magnetic disk, or an optical disk.

[0125] In addition, it should be noted that, in the apparatus and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. Moreover, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but it is not necessary to perform them in chronological order, and some steps can be performed in parallel or independently of each other. For those of ordinary skill in the art, it will be understood that all or any steps or components of the method and apparatus of the present invention can be implemented in any computing device (including processors, storage media, etc.) or a network of computing devices in hardware, firmware, software or a combination thereof, which can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

[0126] Therefore, the purpose of the present invention can also be achieved by running a program or a group of programs on any computing device. The computing device can be a well-known general-purpose device. Therefore, the purpose of the present invention can also be achieved simply by providing a program product containing program code that implements the method or device. That is to say, such a program product also constitutes the present invention, and the storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium can be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. In addition, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but do not necessarily need to be performed in chronological order. Certain steps can be performed in parallel or independently of each other.

[0127] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for measuring the signal arrival angle based on an array antenna, characterized in that: include: Get the value of the signal arrival angle of the nth measurement of the signal to be measured; Based on the value of the signal arrival angle measured for the nth time and the predicted value of the signal arrival angle measured for the n+1th time, the target value of the signal arrival angle measured for the n+1th time is determined; the product of the signal frequency measured for the n+1th time and the antenna array spacing is greater than the product of the signal frequency measured for the nth time and the antenna array spacing, n is a positive integer greater than or equal to 1, and the value of the signal arrival angle is related to the product of the signal frequency of the signal to be measured and the antenna array spacing.

2. The method for measuring the signal arrival angle based on the array antenna according to claim 1, characterized in that: The product of the signal frequency and the antenna element spacing is f·L, where f is the signal frequency and L is the antenna element spacing.

3. The method for measuring the signal arrival angle based on the array antenna according to claim 2, wherein: The product of the signal frequency of the nth measurement and the antenna array spacing f n ·L n and the signal frequency and antenna array spacing value f measured at the n+1th time m ·L m Satisfy: (f m ·L m ) / (f n ·L n ) is less than Δα max / Δα min ; Among them, Δα max When measuring for the n+1th time, the maximum arrival angle α can be measured; Δα min is the error of the signal arrival angle α of the nth signal to be measured.

4. The method for measuring the signal arrival angle based on the array antenna according to claim 2, wherein: The signal arrival angle α is determined by the following relationship: in, Where Δd is the distance difference between the measured signal and the antenna of the measuring device, λ = c / f, c is the speed of light, f is the frequency of the measured signal, and the phase difference of the measured signal is The range is By measuring, and are the phase values ​​of the arrival angles reaching the two antennas respectively.

5. A device for measuring the signal arrival angle based on an array antenna, characterized in that: include: An acquisition module is used to obtain the value of the signal arrival angle of the nth measurement of the signal to be measured; A processing module, configured to determine a target value of the signal arrival angle for an n+1th measurement based on the value of the signal arrival angle measured for the nth time and the predicted value of the signal arrival angle for the n+1th measurement; the product of the signal frequency of the n+1th measurement and the antenna array spacing is greater than the product of the signal frequency of the nth measurement and the antenna array spacing, where n is a positive integer greater than or equal to 1, and the value of the signal arrival angle is related to the product of the signal frequency of the signal to be measured and the antenna array spacing.

6. The device for measuring the signal arrival angle based on the array antenna according to claim 5, characterized in that: The product of the signal frequency and the antenna element spacing is f·L, where f is the signal frequency and L is the antenna element spacing.

7. The device for measuring the signal arrival angle based on the array antenna according to claim 6, characterized in that: The product of the signal frequency of the nth measurement and the antenna array spacing f n ·L n and the signal frequency and antenna array spacing value f measured at the n+1th time m ·L m Satisfy: (f m ·L m ) / (f n ·L n ) is less than Δα max / Δα min ; Among them, Δα max When measuring for the n+1th time, the maximum arrival angle α can be measured; Δα min is the error of the signal arrival angle α of the nth signal to be measured.

8. The device for measuring the signal arrival angle based on an array antenna according to claim 6, wherein: The signal arrival angle α is determined by the following relationship: in, Where Δd is the distance difference between the measured signal and the antenna of the measuring device, λ = c / f, c is the speed of light, f is the frequency of the measured signal, and the phase difference of the measured signal is The range is By measuring, and are the phase values ​​of the arrival angles reaching the two antennas respectively.

9. A device for measuring the signal arrival angle based on an array antenna, characterized in that: include: Multi-frequency antenna array to receive incoming signals; The radio frequency transceiver unit is used to convert the received signal into a baseband signal and sample the baseband signal to obtain the phase information of the signal; as well as The device for measuring the signal arrival angle of an array antenna according to any one of claims 5 to 8.

10. A computer-readable storage medium, characterized in that The device stores instructions, which, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 4.

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