宽频带信号频率估计方法  

Study of the estimation of frequencies from the wide band

作　　者：王洪洋[1] 廖桂生[1] 周争光[1] 吴云韬[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》2005年第4期566-569,共4页Journal of Xidian University

基　　金：国家自然科学基金资助项目(60172028);高等学校博士学科点专项基金资助项目(20010701008)

摘　　要：研究了宽频带信号频率的估计问题.对宽频带信号进行Nyquist采样,其硬件复杂度相当大,欠采样技术是解决此类问题的首选技术.但欠采样会引起信号频率的混叠,必须解模糊.通过增加一个延时通道提供的信息和一定的解模糊算法来解频率模糊,硬件代价较小.为进一步降低运算复杂度,给出了简易算法,增强了算法的实用性.An algorithm for estimating frequencies from the wide band is proposed. Along with the information provided by the auxiliary channel and the aliased frquencies estimated, we can solve the frequency ambiguity due to sub-Nyquist sampling which is usually adopted to estimate frequencies from the wide band. The method for the estimation of frequencies with sub-Nyquist sampling can reduce the complexity of the overall hardware.In order to reduce the computational burden of the proposed algorithm, a more simplified algorithm is deduced.Finally, simulation results verify the efficiency of this method.

关 键 词：宽频带 欠采样 频率模糊 运算复杂度 

分 类 号：TN911.6[电子电信—通信与信息系统]