基于CP-ESPRIT的MIMO-OFDM频偏估计算法  

CFO Estimation Algorithm Based on CP and ESPRIT for MIMO-OFDM System

作　　者：张吉刚 邹剑金[2] 黄凌[3] 

机构地区：[1]解放军72671部队 [2]解放军通信指挥学院 [3]山东财政学院

出　　处：《无线电通信技术》2009年第6期56-58,共3页Radio Communications Technology

摘　　要：针对已有MIMO-OFDM盲同步算法需要较多接收数据的缺点,提出了一种基于循环前缀和ESPRIT思想的MIMO-OFDM频偏估计算法——CP-ESPRIT算法。算法利用接收信号中未被IBI污染的循环前缀和OFDM符号中相应的部分构造接收信号矩阵,然后利用ESPRIT方法求得频偏估计值。该算法只要一个符号就能估计频偏,且频偏估计范围为一个子载波宽度,可用于载波频偏精同步。仿真验证了算法的性能。Aimed at the shortcoming of some blind synchronization algorithms which require plenty of received data, a CFO estimation algorithm based on cyclic prefix （CP） and estimation of signal parameters via rotational invariance techniques （ESPRIT） for MIMO-OFDM system is proposed. The algorithm constructs a received signal matrix by uncontaminated CP samples and the corresponding samples in OFDM symbol, and then ESPRIT is used for CFO estimation. Theory analysis shows that CP-ESPRIT can estimate CFO by only one OFDM symbol. The acquisition range of CFO is one subcarrier and can be used for fine carrier synchronization. Simulations have verified the performance of the proposed algorithm.

关 键 词：多入多出正交频分复用 循环前缀 旋转不变技术信号参数估计 载波频偏 

分 类 号：TN911.3[电子电信—通信与信息系统]