Optimal Channel Estimation for MIMO/OFDM Systems in Time-varying Wireless Channels

机译：时变无线信道中MIMO / OFDM系统的最佳信道估计

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We address the problem of time-varying (TV) channel estimation for MIMO/OFDM systems. Firstly, the TV channel is modeled by truncated discrete Fourier bases (DFB) and covers the approximation frames of multiple OFDM symbols. Then, a two-step approach with analytical performance are adopted where in the first step the TV channel is optimally estimated following an minimum mean square error (MMSE) sense in one OFDM symbol. In the second step of the two-step approach, the channel estimates (derived in 1 st step) are further enhance over multiple OFDM symbols by using a novel weighted average approach.Simulation confirms that the proposed approach significantly outperforms the conventional TV channel estimators.

机译：我们解决了MIMO / OFDM系统的时变（TV）频道估计问题。首先，电视频道由截断的离散傅立叶基数（DFB）建模，并覆盖多个OFDM符号的近似帧。然后，采用具有分析性能的两步方法，在第一步中，按照一个OFDM符号中的最小均方误差（MMSE）感知，对电视频道进行最佳估计。在两步法的第二步中，通过使用一种新颖的加权平均方法，信道估计（在第一步中得出）在多个OFDM符号上得到了进一步增强。仿真证实，所提出的方法明显优于传统的电视信道估计器。

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《International Conference on Communications, Circuits and Systems Proceedings》|2008年|332-335|共4页
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WU Qingjun;
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Optimal Channel Estimation for MIMO/OFDM Systems in Time-varying Wireless Channels

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