一种基于互信息的波形优化设计方法  

Method for waveform design based on mutual information

作　　者：纠博[1] 刘宏伟[1] 李丽亚[1] 吴顺君[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,陕西西安710071

出　　处：《西安电子科技大学学报》2008年第4期678-684,共7页Journal of Xidian University

基　　金：国家自然科学基金资助(60772140)

摘　　要：将注水法改进成一种适用于杂波背景下的通用注水法,通过最大化目标回波与扩展目标特性之间的互信息降低目标特性的不确定性.然后把这种思想应用于目标识别波形优化问题,从而增加各类目标的可分性.仿真结果证明,相对于线性调频信号和注水信号,该方法优化波形可以得到更大的互信息,并能将目标识别率提高3%左右,在信杂噪比较低的时候提高更加明显.A novel method termed General Water-Filling is proposed to solve the waveform design problem of a broadband radar for estimating multiple extended targets, which is suitable when the clutter is not negligible. The uncertainty about the target characteristics decreases by maximizing the mutual information between a random extended target and the received signal. Then the General Water-Filling method is employed to the waveform design problem for multiple extended targets identification so as to increase the separability of multiple targets. The results of simulations evaluate the efficiency of the proposed method. Compared to the chirp and Water-Filling signal, our method improves the classification rate by about 3 percent and even performs better in the case of a low SINR.

关 键 词：波形优化 宽带雷达 互信息 目标识别 

分 类 号：TN959.17[电子电信—信号与信息处理]