频域交织子空间法估计DS信号TDOA

Frequency-domain-interleaving subspace algorithm for TDOA estimation of DS signal

频域超分辨率算法用于通信信号到达时间(差)(TOA/TDOA)测量时遇到2个问题:一是噪声采样呈现非白和非平稳特性;二是带限通信信号频域采样点数少,可以利用的信息量有限。针对这2个问题,提出了适合直扩信号到达时间(差)估计的频域交织子空间法,并证明交织之后得到相关矩阵的特征结构更适合于子空间法;推导出算法的可行性,最后给出仿真结果。

Two problems emerging when the frequency-domain super-resolution algorithms is utilized in TOA/TI）OA of communication signals, Firstly, samples of the noises are characterized by non-white and non-stationary, and secondly, the total number of samples is not so many as to make full use of information contained in received signal. A frequency-domain interleaving method is proposed in this paper to solve above problems, together with the feasibility of the algorithm. The last part of this paper presents simulation results.