Two EM-type channel estimation algorithms for OFDM with transmitter diversity

Two EM-type channel estimation algorithms for OFDM with transmitter diversity
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DOI：
10.1109/tcomm.2002.807617
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发表时间：
2002-05
期刊：
2002 IEEE International Conference on Acoustics, Speech, and Signal Processing
影响因子：
--
通讯作者：
Y. Xie;C. Georghiades
Y. Xie;C. Georghiades
中科院分区：
其他
文献类型：
--
作者：
Y. Xie;C. Georghiades

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将正交频分复用（OFDM）技术与发射分集技术相结合可以提高高速无线数据通信系统的容量。对于这种系统中的相干检测，需要信道状态信息（CSI）。在本文中，我们研究了空间交替广义期望最大化（SAGE）算法迭代估计与多个发射机和接收机的信道冲激响应。的估计的性能进行比较与以前提出的期望最大化（EM）为基础的算法的收敛速度。
Combining Orthogonal Frequency Division Multiplexing (OFDM) with transmitter diversity can be used for capacity improvement in high-rate wireless data communication systems. For coherent detection in such systems, channel state information (CSI) is required. In this paper we investigate a Space-Alternating Generalized Expectation-Maximization (SAGE) algorithm to iteratively estimate the channel impulse responses associated with multiple transmitters and the receiver. The performance of the estimator is compared with a previously proposed Expectation-Maximization (EM) based algorithm in terms of convergence rate.