压缩域信号参数估计算法  

Signal Parameter Estimation Algorithm in Compressed Domain

作　　者：秦国领 谷锁林[1] 余建伟[1] 王进冲 魏绍杰 QIN Guo-ling GU Suo-lin YU Jian-wei WANG Jin-chong WEI Shao-jie(Jiuquan Satellite Launch Center, Jiuquan, Gansu 732750, China Taiyuan Satellite Launch Center,Taiyuan 030100, China)

机构地区：[1]酒泉卫星发射中心,甘肃酒泉732750 [2]太原卫星发射中心,太原030100

出　　处：《电子信息对抗技术》2017年第5期15-20,共6页Electronic Information Warfare Technology

摘　　要：参数估计作为盲信号处理的关键环节,对后续信号的侦察处理意义重大。提出一种压缩域信号参数估计算法,通过分析不同测量矩阵下稀疏系数的位置特征,对信号参数进行预判;通过引入降升调频思想,提高了参数估计的分辨率;利用多级搜索策略,大大减少了稀疏字典原子个数,降低了运算复杂度。仿真结果和理论分析表明,算法在没有增加运算复杂度的前提下信号参数估计性能明显提高。Parameter estimation is a key procedure in the process of blind signal, which is very impotant for subsequence signal capture analysis. A parameter estimation algorithm is proposed in compressed domain. Based on the location information characteristics under different measurement matrix, signal parameter is anticipated. By introducting the idea of down and raise modulation, the resolution of parameter estimation is improved. The multi-stage search strategy is determined and atom numbers in sparse dictionary reduces, and computing complexity declines. Experiments results show that the high estimation performance could be obtained while the computing complexity is not increased.

关 键 词：稀疏系数特征 降升调频 压缩感知 参数估计 

分 类 号：TN971.1[电子电信—信号与信息处理]