一种实时精确的正弦波频率估计算法  

Real-Time and Accurate Single Frequency Estimation Approach

作　　者：王宏伟[1] 赵国庆[1] 齐飞林[1] 

机构地区：[1]西安电子科技大学204教研室,西安710071

出　　处：《数据采集与处理》2009年第2期208-211,共4页Journal of Data Acquisition and Processing

基　　金："十一五"武器装备预研基金资助项目

摘　　要：针对Rife算法在被估计频率接近量化频率时的估计精度较差的特点,结合频谱细化技术构造了补充Rife算法。考虑到Rife算法和补充Rife算法性能互补的优点,提出了一种综合算法。仿真结果表明,在低信噪比(SNR)下,该综合算法不仅具有较高的估计精度,而且在整个频段上性能稳定。同时该综合算法只需一次FFT及两点DFT计算,计算量小,易于硬件实现。A completed Rife algorithm based on spectrum subdivision technology is proposed because Rife algorithm has a great deviation for the truth frequency near the discrete frequency. The Rife algorithm and the completed Rife algorithm are complemental on the performance, so a synthesized algorithm is obtained. Simulation results indicate that the synthesized algorithm has the good estimation precision and the good stability in all frequency domains on low SNR. Moreover, the algorithm only needs once FFT and two point DFT, thus being easily implemented by the hardware.

关 键 词：正弦信号 频率估计 频谱细化 

分 类 号：TN971.6[电子电信—信号与信息处理]