基于时域投影变换的空-时二维超分辨技术  

A space-time 2-D high resolution technique based on the projection transformation in time domain

作　　者：张林让[1] 保铮[1] 杨克虎[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,西安710071

出　　处：《西安电子科技大学学报》1997年第A00期62-67,共6页Journal of Xidian University

基　　金：国家自然科学基金;国防预研基金资助

摘　　要：提出一种利用信号的时域信息来改善空域波达方向估计性能的简化方法.该方法对在空域靠得很近的目标,先在空域做波束合成,确定它们的大致方向,然后在时域估计其多普勒频率,并利用投影的方法在多普勒域将目标加以区分,再在空域依次确定目标的波达方向.该方法不需迭代,运算量小,且在低信噪比和存在空域误差时仍能保持良好的性能.Monte-Carlo 实验验证了该方法的有效性.A simplified method to improve the DOA estimation performance of space domain is proposed by using signal′s time domain information.For the targets very close in space domain,first,their direction is defermined roughly by beamforming in space domain.Then the Doppler frequencies of the targets in time domain are estimated.With the projection transformation method,the targets are distingnished in time domain and the DOA of targets are determined successively.This method has the advantage of no iteration,small computation and good performance in the case of low SNR and in the presence of random amplitude and phase errors existing in the array elements.Monte-Carlo experiments illustrate the efficiency of the proposed method.

关 键 词：二维参数估计 空域 雷达 信号处理 时域 

分 类 号：TN957.51[电子电信—信号与信息处理]