On the Effect of Imperfect Channel Estimation upon the Capacity of Correlated MIMO Fading Channels
On the Effect of Imperfect Channel Estimation upon the Capacity of Correlated MIMO Fading Channels
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不完美信道估计对相关MIMO衰落信道容量的影响
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
S. Pupolin
中科院分区：
文献类型：
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作者：
E. Dall’Anese;A. Assalini;S. Pupolin
本文讨论了信道估计误差对相关衰落 MIMO 信道容量的影响。在文献中，通常假设信道估计误差同分布并且与 SNR 和信道相关值无关，从而研究接收机处信道不确定性的影响。在本文中，我们通过考虑信道估计误差之间的相关性来扩展分析，这种情况通常发生在待估计的 MIMO 信道空间相关时。我们提出并研究了 MIMO 信道容量的上限和下限，重点关注通过协方差矩阵产生的信道估计误差的影响。通过详细研究采用线性 MMSE 信道估计器的 MIMO 系统的结果，研究了有效 SNR 和空间相关性所发挥的作用。一、简介
This paper deals with the impact of channel es- timation errors on the capacity of correlated fading MIMO channels. In literature the effect of channel uncertainty at the receiver is often investigated with the assumption that channel estimation errors are identically distributed and independent of both SNR and channel correlation values. In this paper we extend the analysis by considering correlation among the channel estimation errors as typically happen when the MIMO channel to be estimated is spatially correlated. We propose and study upper and lower bounds on the MIMO channel capacity giving emphasis to the impact of the resulting channel estimation error, through its covariance matrix. The role played by the effective SNR and spatial correlation is studied by detailing the results to MIMO systems employing linear MMSE channel estimators. I. INTRODUCTION