基于旋转不变技术实现多用户交织OFDM频偏估计  

ESPRIT Based Implementation of 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：《电讯技术》2005年第3期87-90,共4页Telecommunication Engineering

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

摘　　要：本文提出一种针对多用户交织OFDM载频偏移估计的算法。首先介绍上行链路中交织OFDM的信号结构,利用其周期性质,形成特定的数据矩阵,利用旋转不变技术(ESPRIT)实现载频偏移估计。这种估计方法不需要利用任何训练序列或导频信号,进一步提高了系统频带利用率,降低了计算复杂度。仿真表明,该估计算法在信噪比大于零的情况下也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. We introduce interleaved uplink OFDM signal structure, utilize its cyclic characteristic to form specified data matrixes, and implement the carrier frequency offset estimation based on ESPRIT. This estimation algorithm doesn't need any training sequences or pilot signal, therefore improves band efficiency and lower computational complexity. It shows that this algorithm has good performance when SNR is above zero.

关 键 词：ESPRIT 载频偏移 多用户OFDM 估计算法 

分 类 号：TN929.5[电子电信—通信与信息系统]