计算机工程2011，Vol.37Issue(4)：102-103,106,3.DOI:10.3969/j.issn.1000-3428.2011.04.036
基于自相关的宽范围高精度频偏估计算法
Autocorrelation-based Frequency Offset Estimation Algorithm with Wide Range and High Accuracy
摘要
Abstract
Capturing-range and estimation accuracy of autocorrelation-based carrier frequency offset estimator is a pair of contradictions.Aiming at this problem, a novel phase unwrapping algorithm is proposed.Coarse frequency offset is obtained based on Fast Fourier Transform(FFT) of autocorrelation function of observation signal, and the phase of long delay autocorrelation function value is unwrapped by the coarse frequency offset, three estimation results are averaged.With high estimation accuracy, the novel estimator's capturing-range can be extended to 1/(2MT).Simulation experimental results verify the effectiveness of the proposed algorithm.关键词
载波恢复/频偏估计/自相关函数/快速傅里叶变换/相位展开Key words
carrier recovery/ frequency offset estimation/ autocorrelation function/ Fast Fourier Transform(FFT)/ phase unwrapping分类
信息技术与安全科学引用本文复制引用
王品,黄焱,王超,杨华..基于自相关的宽范围高精度频偏估计算法[J].计算机工程,2011,37(4):102-103,106,3.基金项目
国家部委基金资助项目 （）
