A virtual interpolation sub-array calculation method and system based on least squares estimation
A technology of least squares and calculation method, which is applied in antenna array, complex mathematical operation, design optimization/simulation, etc., can solve the problem of excessive peak sidelobe level of distributed array antenna and peak sidelobe level of distributed array antenna Advanced problems, to achieve the effect of solving the peak sidelobe level too high, eliminating ambiguity, and the process is simple and convenient
Active Publication Date: 2022-04-22
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is: how to effectively solve the problem that the peak sidelobe level of the distributed array antenna is too high, and provides a virtual interpolation sub-array calculation method based on least squares estimation, which can calculate The received signal of the virtual sub-array that needs to be interpolated in the actual array, so as to conveniently determine each interpolated virtual sub-array, the process is simple and convenient, and is worthy of being popularized and used; It can eliminate the ambiguity of the distributed array very well, thus solving the problem that the peak side lobe level of the distributed array antenna is too high
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Embodiment 2
[0130] In order to evaluate the performance of the present invention, the following simulation experiments are carried out in this embodiment.
[0131] θ is 30°, is 45°. A single array is 3×3, d x = d y = 0.5λ. The actual array is 2×2 area array, number: [1,2,3,4], D x =D y =3λ. Virtual unit number: [b 1 ,b 2 ,b 3 ,b 4 ,b 5 ],dis x =dis y = 1.5λ. The simulation experiment model of the virtual array is as follows Figure 5 As shown, the actual array and virtual array pattern are as follows Figure 6 and Figure 7 shown.
[0132] From Figure 6 and Figure 7 It can be seen that the peak sidelobe level of the distributed array is effectively suppressed.
[0133] To sum up, the method and system for calculating the virtual interpolation subarray based on the least squares estimation in the above two groups of embodiments can calculate the phase shift factor of the virtual subarray by means of the least squares method, and can calculate the actual array. The r...
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The invention discloses a virtual interpolation sub-array calculation method and system based on least squares estimation, which belongs to the technical field of distributed array antennas and includes the following steps: S1: setting incident signal parameters; S2: setting actual array and virtual Array; S3: Calculate the phase shift between each array element and each sub-array; S4: Calculate the phase shift factor of the virtual sub-array; S5: Obtain the received signals of all virtual sub-arrays. The present invention estimates the phase shift factor of the virtual sub-array by means of the least square method, and can calculate the received signal of the virtual sub-array that needs to be interpolated in the actual array, thereby conveniently determining each interpolated virtual sub-array. The process is simple and convenient, and it is worthwhile. It is popularized and used; and inserting the interpolated virtual sub-arrays determined by calculation into the actual array can well eliminate the ambiguity of the distributed array, thereby solving the problem of excessive peak sidelobe levels of the distributed array antenna.
Description
technical field [0001] The invention relates to the technical field of distributed array antennas, in particular to a method and system for calculating a virtual interpolation sub-array based on least squares estimation. Background technique [0002] Electromagnetic waves are widely used in radar reconnaissance, wireless communication, satellite positioning, astronomical detection and other fields. Human beings are constantly pursuing higher resolution and greater radiation power to achieve more accurate positioning and longer detection distances. For far-field targets, the resolution of the radar is proportional to the aperture of the antenna. In order to achieve high resolution, human beings will use antennas with larger apertures. Therefore, large-aperture antennas have become the main research object of modern technology. Although traditional large-diameter antennas such as parabolic antennas are highly efficient, they are bulky, occupy a large area, have poor maneuvera...
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IPC IPC(8): G06F30/20G06F17/10H01Q21/00G06F111/10
CPCG06F17/10H01Q21/00
Inventor 张正宇章仁飞王昕彭立军姚艳军郑生华张靖肖海红任伟龙张霄
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST