Airborne Radar Clutter Suppression Method Based on Array Element Amplitude and Phase Error Correction
A technology of array element amplitude and phase error and airborne radar, which is applied to airborne radar clutter suppression based on array element amplitude and phase error correction. Dimensional adaptive processing performance degradation and other issues
Active Publication Date: 2016-08-24
XIDIAN UNIV
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[0006] The purpose of the present invention is to propose an airborne radar clutter suppression method based on array element amplitude and phase error correction for the problem that the performance of traditional space-time two-dimensional adaptive processing is degraded due to the non-stationarity of short-range clutter in non-side-view arrays
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[0063] The present invention will be further described below in conjunction with accompanying drawing:
[0064] refer to figure 1 , is a flow chart of the airborne radar clutter suppression method based on array element amplitude and phase error correction of the present invention. The airborne radar of the present invention is provided with a non-front-side-view array antenna, and the non-front-side-view array antenna is a rectangular area array antenna of N×M dimensions, and N and M are natural numbers, and N represents the number of the non-front-side-view array antenna. The number of rows of array elements (number of array elements in azimuth direction), M represents the number of array element columns (number of array elements in elevation direction) of the non-side-looking array antenna. That is to say, the non-side-looking array antenna is composed of M column sub-arrays, each column sub-array is a uniform linear array composed of N array elements, the distance between...
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The invention belongs to the technical field of radar cluster suppression, and particularly relates to an airborne radar clutter suppression method based on array element amplitude and phase error correction. The airborne radar clutter suppression method based on array element amplitude and phase error correction includes the following steps of firstly, transmitting a pulse signal through a non-side-looking array antenna of airborne radar, receiving corresponding echo data, and estimating the amplitude and phase error vector of each sub-array according to four-dimensional echo data, wherein the corresponding echo data received by the airborne radar are the four-dimensional echo data; secondly, obtaining data obtained after clutter suppression is conducted on the first distance unit of the mth sub-array according to the amplitude and phase error vector of the mth sub-array, forming the data obtained after clutter suppression is conducted on the mth sub-array through the data obtained after clutter suppression is conducted on the first distance unit...the Lth distance unit of the mth sub-array, and forming data obtained after clutter suppression is conducted on the airborne radar through data obtained after clutter suppression is conducted on the first sub-array...the Mth sub-array.
Description
technical field [0001] The invention belongs to the technical field of radar clutter suppression, in particular to an airborne radar clutter suppression method based on array element amplitude and phase error correction, specifically a method for filtering short-range clutter by using the degree of freedom in the pitch direction. This method is mainly used to solve the problem of short-range clutter non-stationarity of the airborne radar non-side-looking array in the presence of array element amplitude and phase errors, and can effectively filter the short-range clutter, thereby enhancing the distance stability of the clutter The performance of subsequent space-time two-dimensional adaptive processing is greatly improved. Background technique [0002] When the airborne radar looks down, for the side-looking array antenna, the clutter Doppler frequency hardly expands with the distance, and the clutter satisfies stationarity in the distance. Therefore, in the process of space...
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IPC IPC(8): G01S7/36
CPCG01S7/2923G01S7/2928
Inventor 王彤崔伟芳吴建新陈华彬
Owner XIDIAN UNIV