计算机工程2017，Vol.43Issue(9)：138-143,6.DOI:10.3969/j.issn.1000-3428.2017.09.025
基于数据相关叠加训练序列的载波频偏与信道联合估计
Joint Estimation of Carrier Frequency Offset and Channel Based on Data Dependent Superimposed Training Sequence
摘要
Abstract
Focusing on the sensitivity to carrier frequency offset in the Orthogonal Frequency Division Multiplexing (OFDM) system,a joint estimation algorithm of carrier frequency offset and channel is proposed in this paper.The frequency offset is estimated through the phase difference between two adjacent OFDM symbols,and the accuracy of estimation is improved by an iteration algorithm.Meanwhile,referring the characteristics of Data Dependent Superimposed Training(DDST) at the frequncy domain are used to estimate two consecutive OFDM channels,and the Basis Expansion Model(BEM) fitting channel is employed to improve the estimation performance.The simulation results show that the proposed algorithm can robustly estimate the carrier frequency offset and channel without increasing system complexity and sacrificing the bandwidth.关键词
正交频分复用/数据相关叠加训练序列/频偏估计/基扩展模型/信道估计Key words
Orthogonal Frequency Division Multiplexing (OFDM)/Data Dependent Superimposed Training (DDST) sequence/frequency offset estimation/Basis Expansion Model (BEM)/channel estimation分类
信息技术与安全科学引用本文复制引用
凌琪琪,罗志年..基于数据相关叠加训练序列的载波频偏与信道联合估计[J].计算机工程,2017,43(9):138-143,6.基金项目
国家自然科学基金(61371115). （61371115）
