东南大学学报（英文版）2008，Vol.24Issue(4)：397-401,5.
MIMO OFDM系统中基于多项式求根的频偏估计算法
Polynomial rooting based frequency offset estimation for MIMO OFDM systems
摘要
Abstract
Based on the frequency domain training sequences,the polynomial-based carrier frequency offset(CFO)estimation in multiple-input multiple-output(MIMO)orthogonal frequency division multiplexing(OFDM) systems is extensively investigated.By designing the training sequences to meet certain conditions and exploiting the Hermitian and real symmetric properties of the corresponding matrices,it iS found that the roots of the polynomials corresponding to the cost functions are pairwise and that both mteger CFO and fractional CFO can be estimated by the direct polynomial rooting approach.By analyzing the polynomials corresponding to the cost functions and their derivatives.it iS shown that they have a comlnon polynomial factor and the former Can be expressed in a quadratic form of the common polynomial factor.Analytical results further reveal that the derivative polynomial rooting approach is equivalent to the direct one in estimation at the same signal-to-noise ratio(SNR) value and that the latter iS superior to the former in complexity. Simulation results agree well with analytical results.关键词
多输入多输出正交频分复用/频率选择性衰落信道/频偏估计/多项式求根Key words
MIMO OFDM:frequency selective fading channels/frequency offset estimation/polynomial rooting分类
信息技术与安全科学引用本文复制引用
蒋雁翔,尤肖虎,高西奇..MIMO OFDM系统中基于多项式求根的频偏估计算法[J].东南大学学报（英文版）,2008,24(4):397-401,5.基金项目
The National Natural Science Foundation of China(No. 60702028),the National High Technology Research and Development Pro-gram of China(863 Program)(No.2007AA01Z268). （No. 60702028）
