一种基于Gloay互补序列的MIMO-OFDM系统同步方案  

A Synchronization Method for MIMO-OFDM System Based on Gloay Complementary Sequence

作　　者：王向阳[1] 韩重阳[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《现代电子技术》2008年第3期51-53,共3页Modern Electronics Technique

基　　金：863课题2006AA01Z281

摘　　要：提出了一种利用Gloay互补序列构造的训练序列用于MIMO-OFDM系统进行同步的方案。在承载数据的偶数序号子载波上发送由Gloay互补序列组成的复数序列,其余子载波置零,由此构成训练序列作为前导符。算法利用前导符经多载波调制后的特点进行符号同步和分数倍频偏估计,利用取值为(+1,-1)的复数训练序列构造的差分序列估计整数倍频偏。在详细介绍了同步算法的基础上,给出了系统仿真结果。结果表明,这种同步方案算法估计精确度较高,同时具有实现复杂度低的优点。A new synchronization method for MIMO- OFDM system is put forward in which the Gloay complementary sequence is utilized to construct the training sequence. The training sequence in the preamble is composed with arranging the complex sequence formed by the Gloay complementary sequence on even sub - carriers bearing data while setting zero on the other sub - carriers. The symbol synchronization and fractional frequency offset are estimated by taking advantage of the merits of preamble in the time domain. The integral frequency offset is estimated with the differential sequence based on the complex training sequence consisting of ＋ 1 or - 1 in both real and imaginary part. The detailed synchronization algorithm and system simulation results are given. It is shown that the method of synchronization demonstrates the accurate estimation performance and low implementation complexity.

关 键 词：MIMO-OFDM Gloay互补序列 粗同步 分数倍频偏 整数倍频偏 精同步 

分 类 号：TN929.5[电子电信—通信与信息系统]