EM-based iterative receiver design with carrier-frequency offset estimation for MIMO OFDM systems
EM-based iterative receiver design with carrier-frequency offset estimation for MIMO OFDM systems
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DOI：
10.1109/tcomm.2005.844920
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发表时间：
2005-05
期刊：
影响因子：
--
通讯作者：
Yong Sun;Zixiang Xiong;Xiaodong Wang
中科院分区：
文献类型：
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作者：
Yong Sun;Zixiang Xiong;Xiaodong Wang
在这封信中，我们研究的期望最大化（EM）为基础的迭代接收机的设计多输入多输出（MIMO）正交频分复用系统的载波频率偏移（CFO）的存在。激励的EM算法中的最大似然估计的精神，我们首先提出了一个导频辅助CFO估计方案，允许快速傅立叶变换为基础的快速实现。然后，将该CFO估计并入迭代接收机的初始化步骤中。实验结果表明，我们的接收机设计在打击CFO的有效性。
In this letter, we study the design of expectation-maximization (EM)-based iterative receivers for multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing systems with the presence of carrier-frequency offset (CFO). Motivated by the spirit of maximum-likelihood estimation in the EM algorithm, we first present a pilot-aided CFO estimation scheme that allows fast Fourier transform-based fast implementation. Then this CFO estimation is incorporated into the initialization step of the iterative receiver. Experimental results show the effectiveness of our receiver design in combating CFO.