一种新的角度多普勒补偿方法

doi:10.3969/j.issn.1001-2400.2015.06.027

Abstract

Abstract:

In a non-side looking airborne radar system, the clutter of different range cells is not independently and identically distributed, which is caused by the severe clutter range-dependence. The clutter range-dependence can be compensated by the angle Doppler compensation (ADC) method simply and quickly. Although the ADC is widely applied, the compensation performance of the ADC is affected by the system error significantly because of the mismatch between Doppler frequency and spatial frequency. In this paper, a novel method to compensate the clutter range-dependence, namely ADC using sparse recovery (SR-ADC), is proposed. Firstly, the clutter spectral distribution estimation of the test cell and training cells are obtained by using sparse recovery. Then, the spatial frequencies and Doppler frequencies of the clutter spectrum center are determined. Finally, transform matrixes of different training cells are designed so that the clutter of training cells could be nearly stationary with respect to that of the test cell. Compared with the traditional angle Doppler compensation method, the proposed method improves greatly the compensation performance, especially that of main-lobe clutter. In addition, this method can also achieve good performance when the system error exists.

Key words: non-side looking airborne radar, clutter range-dependence, angle Doppler compensation, sparse recovery

CLC Number:

TN959

FENG Weike;ZHANG Yongshun;ZHANG Dan. Novel angle Doppler compensation method[J].J4, 2015, 42(6): 158-163.

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Novel angle Doppler compensation method

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