Pitching filtering method based on adaptive sidelobe cancellation

Abstract

The invention discloses a pitching filtering method based on adaptive sidelobe cancellation. According to the pitching filtering method, an in-column pitching filtering column subarray synthesis technology is employed, and on the basis of full utilization of planar array information and pulse echo information, non-side-looking array airborne radar clutter suppression performance under condition ofan error is improved; and an adaptive pitching filtering weight is employed, namely, the pitching filtering weight is obtained through training based on a first piece of filling pulse echo data, theclutter suppression performance of the method is hardly influenced by the error, and short range clutter of effective pulse echo is filtered through utilization of the adaptive trained pitching filtering weight.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a pitch filtering method based on adaptive sidelobe cancellation, which is used for short-range clutter suppression of non-frontal array airborne radars. Background technique [0002] The performance of clutter suppression is the main factor that affects whether the airborne radar can look down normally. Therefore, the technology of clutter suppression for airborne radar has attracted the attention of researchers from all over the world. [0003] Under the condition that both the clutter covariance matrix and the target signal are known, Brennan and Reed proposed the concept and theory of full space-time two-dimensional adaptive processing (STAP) in the journal Aerospace and Electronic Systems (AES) in 1973. , the idea is to generalize the fundamentals of array signal processing to two-dimensional fields sampled by pulses and array elements. Full STAP can achieve a relatively ide...

AI Technical Summary

Problems solved by technology

However, in the case of non-positive side arrays, the clutter suppression performance of this method is not ideal; at the same time, in order to reduce the amount of calculation, this method directly sums the data of the planar array, which does not fully utilize the effective information of the planar array

[0006] In 2009, Meng Xiangdong proposed a static weight pitch filter cascade two-dimensional space-time processing method in the Journal of Xidian. In the case of no error, this method can effectively suppress non-frontal array radar clutter, and make full use of the The effective information of the planar array; however, the clutter suppression performance of this method is not ideal in the case of errors

[0007] The conventional pitch filtering method synthesizes the planar array data into line array data for processing, ignoring the pitch information of the planar array radar echo, which leads to the deterioration of the suppression effect of the non-frontal array radar clutter

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