华中科技大学学报（自然科学版）2017，Vol.45Issue(9)：6-10,5.DOI:10.13245/j.hust.170902
三通道欠采样频率估计
Frequency estimation with three undersampled channels
摘要
Abstract
A method for frequency estimation of multiple sinusoids based on subspace techniques using three-channel undersampled data was proposed.By analyzing the effect of undersampling on fre-quency estimation,it was demonstrated that at least three sub-Nyquist channels were required to guarantee the ambiguity resolution of the aliasing frequencies,provided that the three undersampling ratios were coprime.On this basis,an algorithm that replaces the complex frequency matching process was proposed to resolve frequency ambiguity.The algorithm obtained the possible candidate frequencies from one channel,and then used three-channel samples to filter out the correct estimates. The numerical results verify the correctness of the theoretical analysis.The simulation results show that the proposed method is valid and with high accuracy.关键词
频率估计/欠采样/多通道/亚奈奎斯特/子空间技术Key words
frequency estimation/undersampling/multi-channel/sub-Nyquist/subspace techniques分类
信息技术与安全科学引用本文复制引用
黄山,张海剑,孙洪,余磊..三通道欠采样频率估计[J].华中科技大学学报（自然科学版）,2017,45(9):6-10,5.基金项目
国家自然科学基金资助项目 (61501335) （61501335）
湖北省自然科学基金资助项目 (2015CFB202). （2015CFB202）
