基于正交冗余采样的超分辨信号谱估计  

SUPER-RESOLUTION SPECTRUM ESTIMATION BASED ON ORTHOGONAL REDUNDANCY SAMPLING

作　　者：李阳[1] 戴博伟[2] 肖艳霞[3] 梁立万[1] 潘伟峰[1] 陈雅琴[1] 冯正和[1] 

机构地区：[1]清华大学电子工程系微波与数字通信国家重点实验室,北京100084 [2]中国科学院电子学研究所,北京100080 [3]北京航天航空大学自动控制系,北京100083

出　　处：《电子与信息学报》2002年第7期865-871,共7页Journal of Electronics & Information Technology

基　　金：国家"866"项目(863-317-03-01-15-99);国家自然科学基金(批准号:69871014)

摘　　要：该文提出了一种通过冗余采样进行信号谱估计的新方法,它充分利用冗余采样产生的频谱带限特性,通过对自相关矩阵进行秩1分解的方法来获得信号谱的超分辨估计,与 MUSIC、AR等其他超分辨方法相比,这种方法具有更低的信噪比门限和更高的分辨力。A novel method based on orthogonal redundancy sampling is proposed for har-monies estimation, which utilizes orthogonal redundancy sampling to obtain a signal with the information of its frequency range, and decomposes signal's auto-correlation matrix into the summation of rank-1 matrixes to estimate frequency of harmonics with the information. The results are compared with that of MUSIC and AR algorithms, and find that this method has a lower SNR threshold and higher range resolution.

关 键 词：谱估计 超分辨力 正交冗余采样 正弦信号频率 信号检测 

分 类 号：TN911.23[电子电信—通信与信息系统]