基于导频符号的MIMO-OFDM系统多频偏估计算法  

Multiple Carrier Frequency Offsets Estimation Algorithm for MIMO-OFDM Systems Based on Pilot Symbols

作　　者：许魁[1] 沈越泓[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《系统仿真学报》2008年第11期2960-2964,共5页Journal of System Simulation

摘　　要：提出了一种基于导频符号的多输入多输出正交频分复用(MIMO-OFDM)系统多频偏估计算法。该算法设计了导频符号,并利用设计的导频符号在频域实现多频偏估计。理论分析证明了提出算法适用于低信噪比条件,并推导出了该多频偏估计算法理论上的估计精度。仿真结果验证了提出的算法在低信噪比无线多径信道条件下能够准确估计出各天线间的多个载波频偏。A multiple carrier frequency offsets （CFOs） estimation algorithm for Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing （MIMO-OFDM） systems based on pilot symbols was proposed. Multiple CFOs could be estimated precisely in frequency domain by the proposed method using designed pilot symbols. Theoretical analysis and simulation results show excellent performance of the multiple CFOs estimation by the proposed method at low SNR over wireless multipath channel.

关 键 词：多输入多输出正交频分复用 导频符号设计 频偏估计 低信噪比 M序列 

分 类 号：TN923.53[电子电信—通信与信息系统]