多用户交织OFDM频偏估计  

Carrier frequency offset estimation for interleaved multi-user OFDM

作　　者：张灵燕[1] 张海滨[1] 宋文涛[1] 

机构地区：[1]上海交通大学电子工程系,上海200030

出　　处：《信息技术》2005年第1期1-3,80,共4页Information Technology

基　　金：国家自然科学基金重点项目(60332030);国家863项目资助(2003AA123310)

摘　　要：同步技术是OFDM的关键技术之一。提出一种针对多用户交织OFDM载频偏移估计的算法。首先分析上行链路中交织OFDM的信号结构,利用其周期性质导出特定的数据矩阵,实现频偏估计。这种估计方法不需要利用任何训练序列或导频信号,提高了系统频带利用率。仿真表明,该估计算法在信噪比大于零的情况下都能获得较好的频偏估计。Synchronization is one of the most crucial techniques in OFDM. This paper proposes a carrier frequency offset estimation algorithm for interleaved multi-user OFDM. It analyzes interleaved uplink OFDM signal structure, utilizes its cyclic characteristic to form specified data matrixes, and implements the carrier frequency offset estimation. This estimation algorithm doesn't need any training sequences or pilot signal, therefore improves band efficiency and lower computational complexity. The simulation shows that this algorithm has good performance when SNR is above zero.

关 键 词：MUSIC 载频偏移 9多用户 OFDM 

分 类 号：TN929.5[电子电信—通信与信息系统]