Joint Estimation of Channel,Residual Carrier and Sampling Frequency Offset for OFDM Systems in Time-varying Rayleigh Channel

摘要：

　　In this paper we establish a system model which roundly considers residual carrier frequency offset (RCFO),sampling frequency offset (SFO) and channel complex gains for orthogonal frequency-division multiplexing (OFDM) systems in a time-varying Rayleigh channel.Based on this system model,we propose a new pilot-assisted iterative algorithm for jointly estimation of RCFO,SFO and channel complex gains.In the proposed iterative algorithm,polynomial basis expansion model (P-BEM) is adopted to model the time-varying Rayleigh channel,QR-detection is employed to recover the data signal and a auto-regressive (AR) model is adopted to model the parameters to be estimated,which makes it possible to use the Extended Kalman Filtering (EKF) estimator.All of these mentioned above makes the iterative algorithm have advantages of high estimation accuracy and fast convergence speed.

关键词： OFDM RCFO SFO channel estimation time-varying Rayleigh channel EKF

作者: Sun Zhonghua Yu Lan Yu Lan

作者单位: Aeronautical Training Base Naval Aeronautical Engineering Institute Qingdao, China Institute of Electronic Engineering Air Force Radar Academy Wuhan, China

会议类型: 国际会议

会议名称: 2012 IEEE 14th International Conference on Communication Technology(2012年第十四届通信技术国际会议(ICCT 2012))

会议地点: 成都

会议语种:英文

页码: 197-202

在线出版日期: 2012-11-09（万方平台首次上网日期，不代表论文的发表时间）