Low complexity joint time offset and frequency offset estimations for LTE uplink system  

作　　者：WANG Jun QIN Qi-zhen LIU Shou-yin LI Ting 

机构地区：[1]Department of Electronics and Communication Engineering, Central China Normal University [2]Department of LTE,Wuhan Hongxin Telecom. Technologies CO., LTD

出　　处：《The Journal of China Universities of Posts and Telecommunications》2014年第6期30-36,共7页中国邮电高校学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (60572117);the Scientific Research Foundation for the returned Overseas Chinese scholars, State Education Ministry

摘　　要：The orthogonal frequency division multiplexing（OFDM） is currently used in long term evolution（LTE） system. The time offset estimation（TOE） and frequency offset estimation（FOE） of OFDM is essential in mobile communication base. According to the conventional cross correlation TOE and FOE algorithms, a new cross correlation computation was proposed to estimate the time offset and frequency offset for LTE uplink system, so that the time offset and frequency offset can be estimated simultaneously with low complexity. Compared with the conventional TOE and FOE algorithms, the simulation show that the proposed can reduce complexity and improve performance for FOE with good performance for TOE in additive white Gaussian noise（AWGN） and multipath channel.The orthogonal frequency division multiplexing（OFDM） is currently used in long term evolution（LTE） system. The time offset estimation（TOE） and frequency offset estimation（FOE） of OFDM is essential in mobile communication base. According to the conventional cross correlation TOE and FOE algorithms, a new cross correlation computation was proposed to estimate the time offset and frequency offset for LTE uplink system, so that the time offset and frequency offset can be estimated simultaneously with low complexity. Compared with the conventional TOE and FOE algorithms, the simulation show that the proposed can reduce complexity and improve performance for FOE with good performance for TOE in additive white Gaussian noise（AWGN） and multipath channel.

关 键 词：FOE TOE LTE OFDM 

分 类 号：TN929.5[电子电信—通信与信息系统]