Joint synchronization estimation based on genetic algorithm for OFDM/OQAM systems  

作　　者：LIU Yongjin CHEN Xihong ZHAO Yu 

机构地区：[1]Air and Missile Defense College,Air Force Engineering University,Xi’an 710051,China

出　　处：《Journal of Systems Engineering and Electronics》2020年第4期657-665,共9页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61671468)。

摘　　要：This paper investigates the problem of synchronization for offset quadrature amplitude modulation based orthogonal frequency division multiplexing(OFDM/OQAM) systems based on the genetic algorithm. In order to increase the spectrum efficiency,an improved preamble structure without guard symbols is derived at first. On this basis, instead of deriving the log likelihood function of power spectral density, joint estimation of the symbol timing offset and carrier frequency offset based on the preamble proposed is formulated into a bivariate optimization problem. After that, an improved genetic algorithm is used to find its global optimum solution. Conclusions can be drawn from simulation results that the proposed method has advantages in the joint estimation of synchronization.

关 键 词：offset quadrature amplitude modulation based orthogonal frequency division multiplexing(OFDM/OQAM) SYNCHRONIZATION joint estimation genetic algorithm 

分 类 号：TN929.53[电子电信—通信与信息系统] TP18[电子电信—信息与通信工程]