无线电通信技术2009，Vol.35Issue(4)：61-64,4.
基于FFT的多普勒频偏估计算法研究
Study on Doppler Frequency-deviation Estimation Algorithm Based on FFT
韩秀峰 1吴长奇 1郑恒娜1
作者信息
- 1. 燕山大学,信息科学与工程学院,河北,秦皇岛,066004
- 折叠
摘要
Abstract
The paper proposes a froquency-deviation estimation algorithm based on Fast Fourier Transform that can accurately estimate the polarity and absolute value of the carrier Doppler frequency-deviation. It can be seen from the analysis that the SNR increases enormously after FIT transformation from time domain to frequency domain, and both the number of FFT and the barrier effect will affect the SNR gain and detection probability. The theoretical analysis and simulation results show that the algorithm can effectively reduces the SNR threshold in time domain,and when the SNR is greater than some threshold,the estimation precision is independent of the SNR.关键词
FFT/频偏估计/高斯白噪声/低信噪比Key words
FFT/ frequency-deviation estimation/ Gaussian white noise / low SNR分类
信息技术与安全科学引用本文复制引用
韩秀峰,吴长奇,郑恒娜..基于FFT的多普勒频偏估计算法研究[J].无线电通信技术,2009,35(4):61-64,4.
