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首页> 外文会议>International Conference on Inventive Systems and Control >Channel estimation in a MIMO relay system: Challenges approaches channel estimation in MIMO relay system: A review
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Channel estimation in a MIMO relay system: Challenges approaches channel estimation in MIMO relay system: A review

机译：MIMO中继系统中的信道估计：MIMO中继系统中的挑战和接近信道估计：综述

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摘要

The overall performance of the communication system is highly influenced by the accuracy with which the channel is estimated at the receiver node. It is imperative to design methods that can efficiently provide the channel estimates even in worst case channel scenarios. It becomes extremely challenging to extract reliable channel estimates in the mobile node scenario, wherein the Doppler influences are also participating. Hence, the designed channel estimation methods need to be robust and spectrally efficient, provided that these are not computationally demanding, as well. In this paper, an extensive review of the channel estimation methods for MIMO relay systems that are adopted under varied channel conditions is conducted. We discuss the concept of relaying, the advantage of including relays in MIMO systems and their classification. This is followed by a comparison of these approaches that is made in terms of their spectral efficiency, computational complexity as well as their limitations. Further, we discuss the channel estimation methods specifically designed for the time-varying frequency-selective channels. We emphasize that more work needs to be done for improving the channel estimation methods, especially when the channel is influenced by the Doppler Effect.
机译：通信系统的整体性能受到在接收器节点估计信道的精度的高度影响。即使在最坏的情况信道场景中，它必须有效地提供通道估计的方法。提取移动节点场景中的可靠信道估计变得非常具有挑战性，其中多普勒影响也参与。因此，所设计的信道估计方法需要具有稳健和光谱效率，只要这些不是计算所需的。在本文中，进行了对不同信道条件采用的MIMO中继系统的信道估计方法的广泛审查。我们讨论了中继的概念，包括MIMO系统中的继电器的优势及其分类。随后，这是在它们的光谱效率，计算复杂性以及它们的限制方面进行的这些方法的比较。此外，我们讨论专门为时变频选择信道专门设计的信道估计方法。我们强调需要采取更多的工作来改进信道估计方法，特别是当通道受到多普勒效应的影响时。

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