一种参数估计的自适应辅助通道方法  

Parameter estimation based adaptive auxiliary channel receiver method

作　　者：巩继玲[1] 廖桂生[1] 许京伟[1] 朱圣棋[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2014年第3期8-13,78,共7页Journal of Xidian University

基　　金：国家重点基础研究发展计划(973计划)资助项目(2010CB731903);国家自然科学基金资助项目(61101249);航空科学基金资助项目(20120181004)

摘　　要：在实际应用中,传统辅助通道方法受杂波分布先验信息及系统误差的限制,使辅助通道的选取偏离实际杂波分布.针对这一问题,提出了基于最小二乘参数估计的自适应空时二维辅助通道方法.首先利用单距离回波数据估计杂波分布并采用最小二乘方法估计系统参数,然后自适应选取辅助通道并进行降维空时自适应处理.利用单距离数据进行参数估计具有较高的参数估计精度,适用于任意阵列构型,具有一定的稳健性.The conventional auxiliary channel receiver method is limited by the prior knowledge of clutter distribution and system error in practical application , thus inducing mismatch between the selected auxiliary channels and actual clutter distribution . To deal with the problem , based on least-square parameter estimation , an adaptive space-time auxiliary channel receiver method is proposed in this paper . Firstly , a space-time snapshot of a single range cell is used to estimate the clutter distribution and system parameters are estimated via the least-square method . Then the auxiliary channels are selected adaptively to carry out reduced-dimension adaptive space-time processing . With snapshots from a single range bin , parameter estimation can be achieved with better accuracy . Besides , the proposed method is applicable to arbitrary array geometries , and therefore it is a flexible and robust implementation . Simulation results demonstrate the effectiveness of the proposed method .

关 键 词：空时自适应处理 最小二乘方法 参数估计 辅助通道法 

分 类 号：TN957.52[电子电信—信号与信息处理]