空军预警学院学报Issue(4)：263-266,4.DOI:10.3969/j.issn.2095-5839.2013.04.009
基于宽带欠采样阵列的频率估计算法研究
Algorithm of Frequency Estimation Based on Wide-band Under-sampled Array
摘要
Abstract
Seeing that the conventional FFT frequency estimation algorithm for the wide-band under-sampling can only apply to the case of higher input SNR and the single-signal frequency estimation that is used for the precision requirement being not higher, this paper puts forward a method of the joint solution ambiguity of multiple group sampling frequencies, which could implement the unambiguous estimation of multiple signal frequencies under the circumstances of no need to increase the complex paring algorithm. Aimed at the estimation precision of conventional FFT method being lower, a frequency estimation algorithm with graded high resolution is proposed. The estimation precision of this algorithm can be up to the level of 10 kHz, and an order of magnitude is at least improved, with respect to the order of MHz of conventional FFT algorithm. And also the performance analysis is performed on the FFT frequency measurement of single array element, the FFT frequency measurement of synthetic arrays and the high resolution frequency measurement of arrays. Finally, the effectiveness of this proposed method is verified by simulation results.关键词
宽带欠采样/时域欠采样/频率估计/快速傅里叶变换/多重信号分类算法Key words
wide-band under-sampling/under-sampling in time domain/frequency estimation/fast Fourier transform (FFT)/multiple signals classification algorithm分类
电子信息工程引用本文复制引用
赵曼,陈辉,王俊,邓钰..基于宽带欠采样阵列的频率估计算法研究[J].空军预警学院学报,2013,(4):263-266,4.基金项目
新世纪优秀人才支持计划资助项目(NCET-10-0903)；电子信息控制重点实验室资助项目 （NCET-10-0903）
