摘要
针对Nyquist采样频率过高、硬件实现困难的问题,提出一种基于欠采样的超宽带线性调频信号的调制斜率和初始频率估计方法。该方法利用互谱ESPRIT算法和余数定理对欠采样信号进行解模糊,在低信噪比情况下仍能较精确地估计超宽带线性调频信号的调制斜率和初始频率。计算机仿真证实了该方法的有效性。
In some applications, sampling with Nyquist frequency may be hard to implement due to hardware limitation. Based on subsampling, a method which estimates the modulation rate and initial frequency of the ultra-wideband LFM signal is presented in this paper. Based on the cross-spectra ESPRIT algorithm and remainder theorem, the modulation rate and initial frequency of the subsampling ultra-wideband LFM signal are estimated unambiguously and precisely even in low SNR. Simulation confirms the validity of the method.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2006年第2期157-159,共3页
Journal of University of Electronic Science and Technology of China
基金
国家"973"计划项目资助
关键词
欠采样
调频斜率
初始频率
互谱ESPRIT算法
subsampling
modulation rate
initial frequency
cross-spectra ESPRIT algorithm
