测控技术2017，Vol.36Issue(3)：28-32,36,6.
基于Rife算法的跳频信号瞬时频率估算方法研究
Research on Instantaneous Frequency Estimation of Frequency-Hopping Signal Based on Rife Algorithm
吕军 1贠乐应 1李彤1
作者信息
- 1. 装甲兵工程学院信息工程系,北京100072
- 折叠
摘要
Abstract
The performance of Rife algorithm is analyzed and it is pointed out that it has low estimation accura cy when the true frequency is much close to quantized frequency of FFT.In order to solve this problem,an improved Rife algorithm is presented.This algorithm can make the signal frequency always located in the center between the two neighboring discrete frequencies by using zoom FFT technique.Then,in order to elminate the influence of the low SNR on the Rife algorithm,a method to correct the improved Rife algorithm by using the window function for the signal is proposed.Simulation result shows that the improved algorithm has higher esti mation accuracy,stronger anti-noise performance and better stability than Rife algorithm.关键词
Rife算法/改进Rife算法/频谱细化/频率估计/跳频信号Key words
Rife algorithm/improved Rife algorithm/zoom FFT/frequency estimation/frequency hopping signal分类
信息技术与安全科学引用本文复制引用
吕军,贠乐应,李彤..基于Rife算法的跳频信号瞬时频率估算方法研究[J].测控技术,2017,36(3):28-32,36,6.
