Clutter Cancellation Algorithm for Airborne Passive Radar Based on Block RDLMS in Beam Domain

被引：0
|
作者：
Yang P. [1 ,2 ,3 ]
Lü X. [1 ,2 ]
Liu Y. [1 ,2 ,3 ]
Chai Z. [1 ,2 ,3 ]
Zhang D. [1 ,2 ,3 ]
机构：
[1] Institute of Electronics, Chinese Academy of Sciences, Beijing
[2] National Key Laboratory of Science and Technology on Microwave Imaging, Beijing
[3] University of Chinese Academy of Sciences, Beijing
来源：
Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2017年 / 39卷 / 04期
关键词：
Airborne passive radar; Beam domain; Block RDLMS; Clutter cancellation; Step matrix;
D O I：
10.11999/JEIT160595
中图分类号：
学科分类号：
摘要：
For the cancellation of Doppler-spreading clutters of airborne passive radar, firstly, Block RDLMS in beam domain is proposed in order to reduce computational load. In the proposed algorithm, the order of cancellation in Doppler dimension is reduced by beamforming, and the iteration of adaptive processing is reduced by data segmenting, while FFT can be employed. It is verified that the proposed algorithm can reduce computational load substantially, which is valuable for real-time cancellation. Secondly, the improved algorithm is developed based on the idea of proportionate adaptation. Because the same step is assigned to all weights in the proposed algorithm, there will be relatively more residual clutter when the Clutter to Noise Ratio (CNR) is higher. The improved algorithm will assign different steps proportional to the logarithm of corresponding weights. Simulations show that by using the improved algorithm the residual is reduced 1.3dB and the performance of clutter cancellation approaches the ideal case. © 2017, Science Press. All right reserved.
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页码：960 / 967
页数：7
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