MIMO-OFDM系统下新型联合载波频偏估计方法  

A Joint Carrier Offset Estimation Algorithm Based on MIMO-OFDM System

作　　者：卢继华[1] 刘丹[1] 郑建勇[2] 刘子群[3] 王爱华[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081 [2]北京北方烽火科技有限公司,北京100085 [3]北京交通大学电子信息工程学院,北京100044

出　　处：《北京邮电大学学报》2013年第6期1-6,共6页Journal of Beijing University of Posts and Telecommunications

基　　金：国家青年科学基金项目(61002014);国家自然科学面上基金项目(61271258;61072050);北京理工大学校内基金(20120542019)

摘　　要：为了降低多输入多输出正交频分复用(MIMO-OFDM)无线通信系统的符号间干扰并改善系统对频率偏移和定时的敏感,提出一种联合载波频偏估计算法.采用灵活分割相关及最小均方误差准则改进传统载波频率估计算法,实现了基于MIMO-OFDM无线通信系统的精确频偏估计.分析和仿真结果表明,本算法能在信道状况较差情况下实现均方误差估计性能10-6以下,适用于MIMO-OFDM无线通信系统.A joint carrier offset estimation algorithm is proposed to combat the severe inter-symbol inter- ference and sensitivity to the frequency and timing offset of multiple input multiple output （MIMO） or- thogonal frequency division multiplexing （OFDM）wireless communication system. The proposed algo- rithm of carrier offset using flexible correlation and minimum mean square error （MMSE） rule improves the traditional carrier synchronization effects dramatically and has achieved precise estimation performance in the wireless MIMO-OFDM system structure. Analysis and simulations show that, the mean-square error estimation performance of the proposed algorithm can achieve 10-6 under a poor channel circumstance, which reveals that the joint estimation carrier frequency algorithm is suitable for the frequency bias esti- mation of wireless MIMO-OFDM communication system.

关 键 词：载波频偏估计 灵活分割相关 最小均方误差准则 精频偏估计 

分 类 号：TN911.23[电子电信—通信与信息系统]