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MIMO Block-Fading Channels With Mismatched CSI

机译:CSI不匹配的MIMO衰落信道

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We study transmission over multiple-input multiple-output block-fading channels with imperfect channel state information (CSI) at both the transmitter and receiver. In particular, based on mismatched decoding theory for a fixed channel realization, we investigate the largest achievable rates with independent and identically distributed inputs and the nearest neighbor decoder. We then study the corresponding information outage probability in the high signal-to-noise ratio (SNR) regime and analyze the interplay between estimation error variances at the transmitter and receiver to determine the optimal outage exponent, defined as the high-SNR slope of the outage probability plotted in a logarithmic–logarithmic scale against the SNR. We demonstrate that despite operating with imperfect CSI, power adaptation can offer substantial gains in terms of outage exponent.
机译:我们研究在发送器和接收器上具有不完善的信道状态信息(CSI)的多输入多输出块衰落信道上的传输。特别是,基于用于固定信道实现的不匹配解码理论,我们研究了具有独立且分布均匀的输入和最近的邻居解码器的最大可实现速率。然后,我们研究高信噪比(SNR)方案中的相应信息中断概率,并分析发射机和接收机处估计误差方差之间的相互影响,以确定最佳的中断指数,定义为信号的高SNR斜率。对数对数标度相对于SNR绘制的中断概率。我们证明,尽管使用不完善的CSI进行操作,但电源自适应可以在断电指数方面带来可观的收益。

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