Array signal acquisition device and array signal acquisition processing method

Abstract

The invention relates to the technical field of signal acquisition, in particular to an array signal acquisition device and an array signal acquisition processing method. The array signal acquisition device comprises an array element array, a signal receiver, a signal processing unit, a sampling control unit and at least one channel change-over switch, the signal output end of a first array element in the array element array is in communication connection with a first receiving channel on the signal receiver; and the output ends of the rest array elements in the array element array are in communication connection with the rest signal receiving channels on the signal receiver through the channel change-over switch. The sampling control unit can be used for controlling the channel change-over switch to act, so that the rest of array elements in the array element array are in communication connection with the rest of signal receiving channels on the signal receiver in sequence, and the signal receiver with fewer signal receiving channels can be used for receiving multiple paths of array signals output by the array elements; therefore, the array signal acquisition device is low in hardware cost and wide in application range.

Description

Technical Field

[0001] The present invention relates to the technical field of signal acquisition, and in particular to an array signal acquisition device and an array signal acquisition processing method. Background Art

[0002] In the related art, in the process of radio monitoring, an array element array is generally used to receive multi-channel array signals. In order to simultaneously receive array signals collected by multiple array elements, a signal receiver with multiple signal receiving channels is required to receive the collected multi-channel array signals, and then the received multi-channel array signals are processed to obtain the signal source corresponding to the multi-channel array signals. Subsequently, the signal source is processed to obtain the relevant parameters of the signal source.

[0003] However, signal receivers with multiple signal receiving channels currently on the market generally have the defect of high hardware cost, resulting in high hardware cost of array signal acquisition devices in related technologies. Therefore, there is still room for improvement in array signal acquisition devices in related technologies.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide an array signal acquisition device and an array signal acquisition processing method, aiming to solve the technical problem of high hardware cost of the array signal acquisition device in the related art.

[0006] In one aspect, the present application provides an array signal acquisition device, comprising: an array element array, a signal receiver, a signal processing unit, a sampling control unit, and at least one channel switching switch; the array element array comprises a plurality of array elements, and the signal receiver comprises at least two signal receiving channels;

[0007] Wherein, the signal output end of the first array element in the array element array is communicatively connected to the first receiving channel on the signal receiver; the output ends of the remaining multiple array elements in the array element array are communicatively connected to the remaining signal receiving channels on the signal receiver through the channel switching switch;

[0008] The sampling control unit is used to control the channel switching switch so that the remaining multiple array elements in the array element array are sequentially connected to the remaining signal receiving channels on the signal receiver;

[0009] The first array element is used to receive a first array signal and output the first array signal to the signal receiver;

[0010] The remaining multiple array elements in the array element array are respectively used to receive multi-channel array signals, and output the multi-channel array signals to the signal receiver through corresponding signal receiving channels;

[0011] The signal processing unit is used to use the first array signal as a reference array signal, and perform signal processing on the multiple array signals according to the reference array signal to obtain a signal source corresponding to the array signal.

[0012] In one possible design, the signal processing unit includes an AD converter, an array data separation module, a demodulation module, and a signal alignment module;

[0013] The AD converter is used to sample, hold, quantize and encode the multi-channel array signals in sequence to obtain corresponding multi-channel digital array signals;

[0014] The array data separation module is used to correspond the digital array signal output by each signal receiving channel to each array element according to the timing relationship and the corresponding relationship between the array element and the signal receiving channel, so as to obtain the digital array signal corresponding to each array element;

[0015] The demodulation module is used to demodulate the digital array signals corresponding to the remaining array elements according to the digital array signal corresponding to the first array element to obtain multi-channel demodulated digital array signals;

[0016] The signal alignment module is used to perform timing alignment processing on the multi-channel demodulated digital array signal to obtain a signal source corresponding to the array signal.

[0017] In one possible design, the signal processing unit includes a signal direction finding module;

[0018] The signal direction finding module is used to perform spatial spectrum direction finding processing on the signal source corresponding to the array signal to obtain the incident angle of the signal source.

[0019] In a possible design, the signal processing unit further includes a filtering module, and the filtering module is used to perform filtering processing on the multi-channel demodulated digital array signal.

[0020] In one possible design, the sampling control unit includes a switch control module and a clock signal generation module;

[0021] The clock signal generating module is used to generate a clock signal; the switch control module is used to output a switch control signal, and the switch control signal is used to control the channel switching switch action according to the clock signal, so that the remaining multiple array elements in the array element array are sequentially communicated with the remaining signal receiving channels on the signal receiver.

[0022] In a possible design, the array signal acquisition device includes at least two channel switching switches;

[0023] The sampling control unit further includes a signal frequency division module, which is used to perform frequency division processing on the clock signal to obtain at least two sub-clock signals, and output the at least two sub-clock signals to the at least two channel switching switches respectively;

[0024] The switch control signal is further used to control the channel switching switch action according to the sub-clock signal, so that the remaining multiple array elements in the array element array are sequentially communicated with the remaining signal receiving channels on the receiver.

[0025] On the other hand, the present application also provides an array signal acquisition processing method for controlling the array signal acquisition device as described in any one of the above items; the array signal acquisition processing method comprises:

[0026] Generate a clock signal and a switch control signal, and output the switch control signal to a channel switching switch in an array signal acquisition device; the switch control signal is used to control the channel switching switch action according to the clock signal, so that the remaining multiple array elements in the array element array are sequentially communicated with the remaining signal receiving channels on the receiver.

[0027] In a possible design, the array signal acquisition and processing method further includes:

[0028] receiving a multi-channel array signal output by a signal receiver;

[0029] The multi-channel array signals are sampled, held, quantized and encoded in sequence to obtain corresponding multi-channel digital array signals;

[0030] According to the timing relationship and the corresponding relationship between the array elements and the signal receiving channels, the digital array signals output by each signal receiving channel are matched to each array element to obtain the digital array signals corresponding to each array element;

[0031] Demodulating the digital array signals corresponding to the remaining array elements according to the digital array signal corresponding to the first array element to obtain multi-channel demodulated digital array signals;

[0032] The multi-channel demodulated digital array signal is subjected to timing alignment processing to obtain a signal source corresponding to the array signal.

[0033] In a possible design, the array signal acquisition and processing method further includes:

[0034] A spatial spectrum direction finding process is performed on a signal source corresponding to the array signal to obtain an incident angle of the signal source.

[0035] In a possible design, the array signal acquisition and processing method further includes: filtering the multi-channel demodulated digital array signal.

[0036] According to the array signal acquisition device provided by the present application, the channel switching switch action can be controlled by the sampling control unit, so that the remaining multiple array elements in the array element array are sequentially communicated with the remaining signal receiving channels on the signal receiver. In this way, a signal receiver with fewer signal receiving channels can be used to receive multi-channel array signals output by multiple array elements, and then the signal source corresponding to the array signal can be obtained by processing the multi-channel array signals. In this way, the hardware cost of the array signal acquisition device is relatively low. At the same time, the array signal acquisition device provided by the present application can be applied to scenarios where the number of array elements is greater than the number of signal receiving channels, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is one of the structural schematic diagrams of the array signal acquisition device provided in the embodiment of the present application;

[0038] Figure 2 The second structural diagram of the array signal acquisition device provided in the embodiment of the present application;

[0039] Figure 3 The third structural diagram of the array signal acquisition device provided in the embodiment of the present application;

[0040] Figure 4 This is a schematic diagram of the time domain waveforms of each channel of the signal receiver in the embodiment of the present application;

[0041] Figure 5 This is the MUSIC spatial spectrum obtained when no conjugate multiplication is performed during the simulation test of the embodiment of the present application;

[0042] Figure 6 This is a MUSIC spatial spectrum projection diagram obtained when no conjugate multiplication is performed during the simulation test of the embodiment of the present application;

[0043] Figure 7 It is the MUSIC spatial spectrum obtained after conjugate multiplication during the simulation test of the embodiment of the present application;

[0044] Figure 8 This is a MUSIC spatial spectrum projection diagram obtained after conjugate multiplication during the simulation test of the embodiment of the present application.

[0045] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0047] In the related art, when receiving radio signals, an array element array with multiple elements is usually used to collect multi-channel array signals, and a signal receiver with multiple signal receiving channels is used to receive the multi-channel array signals collected by the array element array. However, the signal receivers with multiple signal receiving channels currently on the market generally have the defects of large device size, high hardware cost, and high power consumption. In addition, in most application scenarios, the number of array elements in the array element array is usually greater than the number of signal receiving channels of the signal receiver. In this way, the signal receiver in the related art cannot simultaneously receive the multi-channel array signals collected by multiple array elements, making the existing array signal acquisition device inapplicable.

[0048] In order to overcome the defects in the above-mentioned related technologies, the present application provides an array signal acquisition device, which includes: an array element array, a signal receiver, a signal processing unit, a sampling control unit and at least one channel switching switch; the array element array includes a plurality of array elements, and the signal receiver includes at least two signal receiving channels;

[0049] Among them, the signal output end of the first array element in the array element array is connected to the first receiving channel on the signal receiver; the output ends of the remaining multiple array elements in the array element array are connected to the remaining signal receiving channels on the signal receiver through the channel switching switch. During the signal acquisition process, the sampling control unit controls the channel switching switch to make the remaining multiple array elements in the array element array communicate with the remaining signal receiving channels on the receiver in turn; thereby, the signal receiver can receive multi-channel array signals; finally, the multi-channel array signals are demodulated and aligned according to the reference array signal to obtain the signal source corresponding to the array signal.

[0050] It can be seen that according to the array signal acquisition device provided by the present application, the channel switching switch action can be controlled by the sampling control unit, so that the remaining multiple array elements in the array element array are sequentially communicated with the remaining signal receiving channels on the signal receiver. In this way, a signal receiver with fewer signal receiving channels can be used to receive multi-channel array signals output by multiple array elements, and then the signal source corresponding to the array signal can be obtained by processing the multi-channel array signals. In this way, the hardware cost of the array signal acquisition device is relatively low. At the same time, the array signal acquisition device provided by the present application can be applied to scenarios where the number of array elements is greater than the number of signal receiving channels, and has a wider range of applications.

[0051] Figure 1 One of the structural diagrams of the array signal acquisition device provided in the embodiment of the present application is shown in FIG. Figure 1As shown, the array signal acquisition device includes: an array element array, a signal receiver 12, a signal processing unit 21, a sampling control unit 20 and at least one channel switching switch; the array element array includes multiple array elements, and the signal receiver 12 includes at least two signal receiving channels. For example, Figure 1 The array element array in includes M array elements, and the M array elements can be respectively represented as a first array element 10, an array element 2, ..., an array element M; Figure 1 The signal receiver 12 includes N signal receiving channels, which are respectively represented as channel 1, channel 2, ..., channel N. Correspondingly, in this embodiment, (N-1) channel switching switches are provided, which can be respectively represented as the first channel switching switch 11, the second channel switching switch, ..., the (N-1)th channel switching switch.

[0052] The signal output end of the first array element 10 in the array element array is communicatively connected to the first receiving channel on the signal receiver 12; the output ends of the remaining multiple array elements in the array element array are communicatively connected to the remaining signal receiving channels on the signal receiver 12 through the channel switching switch. The output end of the sampling control unit 20 is communicatively connected to the multiple channel switching switches and the signal processing unit 21 respectively, and the sampling control unit 20 is used to control the channel switching switch action so that the remaining multiple array elements in the array element array are communicatively connected to the remaining signal receiving channels on the signal receiver 12 in sequence.

[0053] During the array signal acquisition process, the first array element 10 is used to receive the first array signal and output the first array signal to the signal receiver 12 through the channel 1. The remaining multiple array elements in the array element array are respectively used to receive multiple array signals and output the multiple array signals to the signal receiver 12 through corresponding signal receiving channels. The signal processing unit 21 is used to use the first array signal as a reference array signal and perform signal processing on the remaining multiple array signals according to the reference array signal to obtain a signal source corresponding to the array signal.

[0054] It can be seen that according to the array signal acquisition device provided by this embodiment, a signal receiver 12 having a smaller number of signal receiving channels than the number of array elements can be used, so that the overall volume of the acquisition device is small, the power consumption is low, and the hardware cost is low. During operation, the sampling control unit 20 controls the channel switching switch action, so that multiple array elements in the array element array are sequentially communicated and connected with the remaining signal receiving channels on the signal receiver 12, so that a signal receiver 12 with fewer signal receiving channels can be used to receive multiple array signals output by multiple array elements, and then the signal source corresponding to the array signal is obtained by processing the multiple array signals.

[0055] Figure 2 For the second structural diagram of the array signal acquisition device provided in the embodiment of the present application, please refer to Figure 2As shown, in some embodiments, the signal processing unit 21 includes an AD converter 13, an array data separation module 14, a demodulation module 15 and a signal alignment module 16. The AD converter 13 is used to sample, hold, quantize and encode multiple array signals in sequence to obtain corresponding multiple digital array signals; the array data separation module 14 is used to correspond the digital array signals output by each signal receiving channel to each array element according to the timing relationship and the corresponding relationship between the array element and the signal receiving channel, so as to obtain the digital array signal corresponding to each array element. The demodulation module 15 is used to demodulate the digital array signals corresponding to the remaining array elements according to the digital array signal corresponding to the first array element, so as to obtain multiple demodulated digital array signals; the signal alignment module 16 is used to perform timing alignment processing on the multiple demodulated digital array signals to obtain the signal source corresponding to the array signal.

[0056] In some embodiments, the signal processing unit 21 further includes a signal direction finding module 17; the signal direction finding module 17 is used to perform spatial spectrum direction finding processing on a signal source corresponding to the array signal to obtain an incident angle of the signal source.

[0057] In some embodiments, the signal processing unit 21 further includes a filtering module, which is used to filter the multi-channel demodulated digital array signal. Specifically, the filtering module can be a low-pass filtering module, which is used to perform low-pass filtering on the demodulated digital array signal to improve the signal-to-noise ratio of the signal.

[0058] In some embodiments, the sampling control unit 20 includes a switch control module and a clock signal generating module 19. The clock signal generating module 19 is used to generate a clock signal and output the generated clock signal to each channel switching switch and the AD converter 13. The switch control module is used to output a switch control signal, and the switch control signal is used to control the corresponding channel switching switch action according to the clock signal, so that the remaining multiple array elements in the array element array are sequentially connected to the remaining signal receiving channels on the receiver. For example, at time t1 to t2, the sampling control unit 20 controls the first channel switching switch 11 to act, and sequentially controls array element 2, array element 3, and array element 4 to communicate with channel 1 respectively, so that the array signals collected by array element 2, array element 3, and array element 4 are output to the signal receiver 12.

[0059] Exemplarily, the channel switching switch of this embodiment may adopt a multi-position conduction switching switch or a multi-path conduction switching switch commonly used in circuits, so that when the switch is switched to different positions, different array elements and signal receiving channels are turned on.

[0060] Figure 3 For the third structural diagram of the array signal acquisition device provided in the embodiment of the present application, please refer to Figure 2 and3 As shown, in some embodiments, the array signal acquisition device includes two channel switching switches, which are respectively a first channel switching switch 11 and a second channel switching switch. In this application scenario, the sampling control unit also includes a signal frequency division module 18, which is used to perform frequency division processing on the clock signal to obtain at least two sub-clock signals, and output the at least two sub-clock signals to the first channel switching switch 11 and the second channel switching switch respectively. The switch control signal is also used to control the channel switching switch action according to the sub-clock signal, so that the remaining multiple array elements in the array element array are sequentially connected to the remaining signal receiving channels on the signal receiver 12. Among them, the two sub-clock signals have the same timing as the original clock signal.

[0061] It can be seen that, unlike the traditional array signal acquisition method, the array signal acquisition device designed based on the concept of channel switching in this application can receive electromagnetic signals received by multiple array elements using only two-channel signal receivers. In a certain sampling period, only a certain array element is sampled, and it takes a certain amount of time to achieve complete sampling of all array elements. However, with the development of today's electronic technology, the channel switching interval can be controlled within a very small time range. This makes it possible to engineer a low-cost spatial spectrum direction finding method based on channel switching.

[0062] In some embodiments, Figure 2 Taking the array signal acquisition device shown in the figure as an example, the signal acquisition process specifically includes the following signal acquisition process:

[0063] Step 1: connect array element 1 in a uniform circular array of M array elements to channel 1 of an N (2<N<M) channel signal receiver 12, and use the array signal received by array element 1 as a reference array signal x1(t).

[0064] Step 2: Use the channel switching switch to receive the array signals received by the remaining (M-1) array elements of the receiving array according to the channel array element corresponding vector [η2,…,η n ,…,η N ] for time-sharing sampling, the signal output by each signal receiving channel can be expressed as [x2(t),…,x N (t)], where N is the number of signal receiving channels.

[0065] Step 3: Transpose the array signals received by each channel. Then the signal received by the signal receiver 12 can be expressed as X = [x1(t), x2(t), ..., x NThe array data separation module 14 corresponds the digital array signal output by each signal receiving channel to each array element according to the timing relationship during sampling and the corresponding relationship between each array element and each signal receiving channel, and obtains the array signal S=[x1(t),x2(t),…,x M (t)]'.

[0066] Step 4: The demodulation module 15 performs conjugate multiplication of the array signal S corresponding to each array element and the reference array signal x1(t) to realize demodulation of the array signal, and performs low-pass filtering on the demodulated signal to finally obtain the demodulated signal

[0067] Step 5: For the demodulated signal The signal alignment module 16 performs time alignment processing on the array signal corresponding to each array element. Specifically, the array signal corresponding to each array element is delayed to obtain a delayed signal source.

[0068] Step 6: The signal direction finding module 17 detects the signal source The MUSIC algorithm in the spatial spectrum is used to find the direction of the incident signal source and obtain the incident angle in step 1.

[0069] In some embodiments, the reference array signal x1(t) may also be expressed as:

[0070] x1(t)=a1s(t)+n1(t)(1)

[0071] In the above formula (1), s(t) is the signal source, and n1(t) is the noise signal received by the first array element (ie, antenna).

[0072] The vectors [η2,…,η2] corresponding to each signal receiving channel in step 2 above are n ,…,η N ]satisfy:

[0073] 2=η2<…<η n <…<η N ≤M (2)

[0074] The above formula indicates that the number of channels of the signal receiver is at least 2 and no more than the number of array elements M. In the above formula (2), η n Indicates the starting array element number of the array element switched by the nth channel of the signal receiver. The number of array elements switched by the nth channel of the receiver can be expressed as:

[0075] ξ n =η n+1 -η n (3)

[0076] Among them, the signal x obtained by time-sharing sampling using channel switching n (t) is a piecewise function, which can be expressed as:

[0077]

[0078] In formula (4), χ = T + Δt, T is the sampling duration at each antenna, Δt is the time required for channel switching, They are array elements numbered η n ~(η n -1), and k is the channel switching round.

[0079] The array signals received by the M array elements recovered in the above step 3 can be specifically expressed as:

[0080]

[0081] In the above formula, ξ2=η3-η2, ξ N =M+1-η N .

[0082] a1, a2, …, a appearing in the above steps M is the parameter in the steering vector A of the antenna receiving array. The specific relationship is:

[0083]

[0084] In the above formula (8), φ1, φ2, …, φ M represents the phase difference between the mth array element and the center of the uniform circular array, R is the radius of the uniform circular array, λ is the wavelength of the signal transmitted by the source, θ, are the elevation angle and azimuth angle of the incident direction of the signal source respectively.

[0085] In the above step 4, the specific process of conjugate multiplication and low-pass filtering can be expressed by the following formula:

[0086]

[0087] In the above step 5, the demodulated signal obtained in step 4 is Perform delay processing to obtain aligned signals Specifically expressed as:

[0088]

[0089] For the signal obtained in step 5 Process and calculate its second-order statistics covariance matrix K is the number of snapshots, and the feature decomposition is performed:

[0090]

[0091] In the above formula, U S is the signal subspace, U N is the noise subspace, ∑ S is the signal characteristic value, ∑ N is the noise eigenvalue, and its eigenvalue ∑ is sorted.

[0092] The number of incident sources l is obtained by using the source number estimation method, the first l largest eigenvalues ​​in the eigenvalue sequence obtained by sorting in step 6 are taken, and the eigenvectors corresponding to these l eigenvalues ​​constitute the signal subspace U S , the eigenvectors corresponding to the remaining (Ml) eigenvalues ​​constitute the noise subspace U N .

[0093] Step 8: Since the array steering vector is orthogonal to the noise subspace: Get the array space spectrum function:

[0094]

[0095] Varying the pitch angle θ and azimuth Traverse the two-dimensional space domain and find the spatial spectrum function P MUSIC The spectral peak is used to estimate the direction of arrival.

[0096] In this embodiment, Figure 3 Taking the signal acquisition device shown in the figure as an example, Figure 4 For a schematic diagram of the time domain waveform of each channel of the signal receiver in the embodiment of the present application, please refer to Figure 3 and Figure 4 As shown, Figure 3 The signal acquisition device with 7 array elements shown in the figure was simulated and tested.

[0097] Among them, the corresponding vector of the channel array element in this embodiment is [1,2,5]. The simulation conditions are: the array radius is 0.044875m, the incident signal source is: the LFM signal with a frequency of 18.1GHz, a pitch angle of 8°, an azimuth angle of 198°, and a slope of 100MHz / μs:. The sampling rate is 2.4GHz, the sampling points are 1152, the signal-to-noise ratio is 10dB, the noise bandwidth is 37MHz, the sampling duration T is 150ns, and the time Δt required for channel switching is 15ns.

[0098] Figure 5 This is the MUSIC spatial spectrum obtained when no conjugate multiplication is performed during the simulation test of the embodiment of the present application. Figure 6The MUSIC spatial spectrum projection diagram obtained when the conjugate multiplication is not performed during the simulation test of the embodiment of the present application, the MUSIC spatial spectrum diagram and the projection diagram obtained when the conjugate multiplication is not performed during the simulation test are respectively as follows: Figure 5 and Figure 6 shown. Figure 7 It is the MUSIC spatial spectrum obtained after conjugate multiplication during the simulation test of the embodiment of the present application, Figure 8 The MUSIC spatial spectrum projection diagram obtained by conjugate multiplication during the simulation test of the embodiment of the present application. The MUSIC spatial spectrum diagram and projection diagram obtained by the sampling device of the present embodiment are respectively as follows: Figure 6 and Figure 7 shown.

[0099] By comparison Figure 5 , Figure 6 , Figure 7 and Figure 8 It can be seen that the incident direction of the signal source can be obtained as (8°, 197.5°) in this embodiment, which verifies the feasibility and accuracy of the signal sampling device provided by the present application.

[0100] This embodiment also provides an array signal acquisition processing method, which is used to control the array signal acquisition device as described above; the array signal acquisition processing method includes: generating a clock signal and a switch control signal, and outputting the switch control signal to a channel switching switch in the array signal acquisition device; the switch control signal is used to control the channel switching switch action according to the clock signal, so that the remaining multiple array elements in the array element array are sequentially communicated and connected with the remaining signal receiving channels on the receiver.

[0101] In some embodiments, the array signal acquisition and processing method further includes: receiving multiple array signals output by a signal receiver; performing sampling, holding, quantization and encoding processing on the multiple array signals in sequence to obtain corresponding multiple digital array signals; according to the timing relationship and the corresponding relationship between the array element and the signal receiving channel, corresponding the digital array signal output by each signal receiving channel to each array element to obtain the digital array signal corresponding to each array element; according to the digital array signal corresponding to the first array element, demodulating the digital array signals corresponding to the remaining array elements to obtain multiple demodulated digital array signals; performing timing alignment processing on the multiple demodulated digital array signals to obtain the signal source corresponding to the array signal.

[0102] In some embodiments, the array signal acquisition and processing method further includes: performing spatial spectrum direction finding processing on a signal source corresponding to the array signal to obtain an incident angle of the signal source.

[0103] In some embodiments, the array signal acquisition and processing method further includes: filtering the multi-channel demodulated digital array signal.

[0104] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0105] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0106] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0107] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An array signal acquisition device, characterized in that: include: An array element array, a signal receiver, a signal processing unit, a sampling control unit and at least one channel switching switch; the array element array includes a plurality of array elements, and the signal receiver includes at least two signal receiving channels; Wherein, the signal output end of the first array element in the array element array is communicatively connected to the first receiving channel on the signal receiver; the output ends of the remaining multiple array elements in the array element array are communicatively connected to the remaining signal receiving channels on the signal receiver through the channel switching switch; The sampling control unit is used to control the channel switching switch so that the remaining multiple array elements in the array element array are sequentially connected to the remaining signal receiving channels on the signal receiver; The first array element is used to receive a first array signal and output the first array signal to the signal receiver; The remaining multiple array elements in the array element array are respectively used to receive multi-channel array signals, and output the multi-channel array signals to the signal receiver through corresponding signal receiving channels; The signal processing unit is used to use the first array signal as a reference array signal, and perform signal processing on the multiple array signals according to the reference array signal to obtain a signal source corresponding to the array signal.

2. The array signal acquisition device according to claim 1, characterized in that: The signal processing unit includes an AD converter, an array data separation module, a demodulation module and a signal alignment module; The AD converter is used to sample, hold, quantize and encode the multi-channel array signals in sequence to obtain corresponding multi-channel digital array signals; The array data separation module is used to correspond the digital array signal output by each signal receiving channel to each array element according to the timing relationship and the corresponding relationship between the array element and the signal receiving channel, so as to obtain the digital array signal corresponding to each array element; The demodulation module is used to demodulate the digital array signals corresponding to the remaining array elements according to the digital array signal corresponding to the first array element to obtain multi-channel demodulated digital array signals; The signal alignment module is used to perform timing alignment processing on the multi-channel demodulated digital array signal to obtain a signal source corresponding to the array signal.

3. The array signal acquisition device according to claim 1 or 2, characterized in that: The signal processing unit includes a signal direction finding module; The signal direction finding module is used to perform spatial spectrum direction finding processing on the signal source corresponding to the array signal to obtain the incident angle of the signal source.

4. The array signal acquisition device according to claim 2, characterized in that: The signal processing unit further comprises a filtering module, and the filtering module is used to perform filtering processing on the multi-channel demodulated digital array signal.

5. The array signal acquisition device according to claim 1 or 2, characterized in that: The sampling control unit includes a switch control module and a clock signal generating module; The clock signal generating module is used to generate a clock signal; the switch control module is used to output a switch control signal, and the switch control signal is used to control the channel switching switch action according to the clock signal, so that the remaining multiple array elements in the array element array are sequentially communicated with the remaining signal receiving channels on the signal receiver.

6. The array signal acquisition device according to claim 5, characterized in that: The array signal acquisition device includes at least two channel switching switches; The sampling control unit further includes a signal frequency division module, which is used to perform frequency division processing on the clock signal to obtain at least two sub-clock signals, and output the at least two sub-clock signals to the at least two channel switching switches respectively; The switch control signal is further used to control the channel switching switch action according to the sub-clock signal, so that the remaining multiple array elements in the array element array are sequentially communicated with the remaining signal receiving channels on the receiver.

7. An array signal acquisition and processing method, characterized in that: Used to control the array signal acquisition device according to any one of claims 1 to 5; The array signal acquisition and processing method comprises: Generate a clock signal and a switch control signal, and output the switch control signal to a channel switching switch in an array signal acquisition device; The switch control signal is used to control the channel switching switch action according to the clock signal, so that the remaining multiple array elements in the array element array are sequentially communicated with the remaining signal receiving channels on the receiver.

8. The array signal acquisition and processing method according to claim 7, characterized in that: The array signal acquisition and processing method further comprises: Receive a multi-channel array signal output by a signal receiver; perform sampling, holding, quantization and encoding processing on the multi-channel array signal in sequence to obtain a corresponding multi-channel digital array signal; According to the timing relationship and the corresponding relationship between the array elements and the signal receiving channels, the digital array signals output by each signal receiving channel are matched to each array element to obtain the digital array signals corresponding to each array element; Demodulating the digital array signals corresponding to the remaining array elements according to the digital array signal corresponding to the first array element to obtain multi-channel demodulated digital array signals; The multi-channel demodulated digital array signal is subjected to timing alignment processing to obtain a signal source corresponding to the array signal.

9. The array signal acquisition and processing method according to claim 7 or 8, characterized in that: The array signal acquisition and processing method further comprises: A spatial spectrum direction finding process is performed on a signal source corresponding to the array signal to obtain an incident angle of the signal source.

10. The array signal acquisition and processing method according to claim 8, characterized in that: The array signal acquisition and processing method further includes: filtering the multi-channel demodulated digital array signal.

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