一种改进的B3G MIMO-OFDM系统的帧同步方法  

An Improved Frame Synchronization Algorithm in B3G MIMO-OFDM System

作　　者：余鹤[1] 冯冲[1] 杨冰[1] 张建华[1] 张平[1] 

机构地区：[1]北京邮电大学无线新技术研究所,北京100876

出　　处：《无线电通信技术》2007年第6期1-3,9,共4页Radio Communications Technology

基　　金：国家"863计划"项目(2003AA12331004);三星电子中国通信研究院资助项目

摘　　要：同步问题一直是MIMO-OFDM系统的关键问题。前人虽提出了一些经典同步算法,但对同步实现中的关键参数——同步判决门限很少涉及。在前人提出的经典帧同步算法基础上进行改进,提出一种有效的自适应门限的同步帧头判决方案。同时证明该方案能有效地对抗无线信道中的码间干扰和多径衰落。仿真结果表明,此方案能获得很好的性能,适用于高速MIMO-OFDM系统。Synchronization is one of the key issues for MIMO-OFDM system,Though many classical synchronization algorithms have been put forward, few of them refer to the threshold of frame header decision, which is the key parameter of frame synchronization, This paper improves the classical frame synchronization algorithm by bringing forth a new effective frame header decision scheme, which uses an adaptive threshold. Moreover,the scheme can resist effectively the ISI （inter-symbol-interference） and multi-path interference in the wireless channel, The simulation result shows that good performance is gained, and the scheme is applicable in high speed MIMO-OFDM system.

关 键 词：帧同步 判决 自适应门限 MIMO—OFDM 

分 类 号：TN929.5[电子电信—通信与信息系统]