An Improved Scheme to Suppress Coherent Interference in LCMV Adaptive Array
When the interference and desired signal are coherent, performance of the linearly-constrained-minimum-variance-criterion (LCMV) based adaptive array will degrade dramatically. Conventional uniform spatial smoothing (USS) has poor ability to suppress coherent interference, and it will reduce the array aperture. In the paper, an improved scheme to suppress coherent interference is proposed. Firstly, the paper presented an adaptive weighted-spatial-smoothing (WSS) algorithm, which can de-correlate the coherent interference effectively. Then, based on WSS and the LCMV criterion, the optimum weight vector of subarray beamformer can be obtained. Lastly, considering the phase relationship between each subarray, an approach for full array beamforming is proposed. The scheme greatly improves the arrays ability to suppress coherent interference and avoids the loss of aperture caused by conventional spatial smoothing. Theoretical analysis and computer simulation confirmed the availability and robustness of the algorithm.
Wei Zhou Demin Zhang Yun Lin Zhengzhong Zhou
Key Lab of Mobile Communications, Chongqing University of Posts and Telecommunications,Chongqing, 40 Key Lab of Mobile Communications, Chongqing University of Posts and Telecommunications,Chongqing, 40 School of Communication and Information Engineering, University of Electronic Science and Technology
国际会议
2006 International Conference on Communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)
广西桂林
英文
988-992
2006-06-25（万方平台首次上网日期，不代表论文的发表时间）