Modified Generalized Sidelobe Canceller for Nonuniform Linear Array Radar Space-Time Adaptive Processing

Xiang ZHAO  Zishu HE  Yikai WANG  Yuan JIANG  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E101-A   No.9   pp.1585-1587
Publication Date: 2018/09/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E101.A.1585
Type of Manuscript: LETTER
Category: Digital Signal Processing
Keyword: 
space-time adaptive processing,  generalized sidelobe canceller,  nonuniform linear array,  modified Gram-Schmidt orthogonalization,  

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Summary: 
This letter addresses the problem of space-time adaptive processing (STAP) for airborne nonuniform linear array (NLA) radar using a generalized sidelobe canceller (GSC). Due to the difficulty of determining the spatial nulls for the NLAs, it is a problem to obtain a valid blocking matrix (BM) of the GSC directly. In order to solve this problem and improve the STAP performance, a BM modification method based on the modified Gram-Schmidt orthogonalization algorithm is proposed. The modified GSC processor can achieve the optimal STAP performance and as well a faster convergence rate than the orthogonal subspace projection method. Numerical simulations validate the effectiveness of the proposed methods.