关键词:长期演进; 正交频分复用; 载波间干扰; 小区搜索; 残留频偏估计
Effective estimation method to residual carrier frequency offset for LTE downlink
WEI Ziheng1, LI Bi1,2, LIN Tusheng1
(1.School of Electronic & Information Engineering, South China University of Technology, Guangzhou 510640, China; 2.School of Informations, Guangdong University of Foreign Studies, Guangzhou 510420, China)
Abstract:According to LTE systems being very sensitive to carrier frequency offset,this paper proposed a novel residual carrier frequency offset estimation method for LTE downlink.Estimated the residual carrier frequency offset by conjugate correlating the frequencydomain channel estimation of PSCH and that of SSCH which were adjacent symbols in timedomain.Theoretical analysis shows the proposal algorithm is highly accuracy though with limited range estimation.Moreover,it keeps very low computational cost and reduces the implementation complexity.Simulation results verify the proposal algorithm with good performances both in AWGN and multipath fading channel.......