论文标题
在不完美的通道状态信息下缓慢褪色通道的线性收缩接收器
Linear shrinkage receiver for slow fading channels under imperfect channel state information
论文作者
论文摘要
本文仅在接收器的单输入多输出（SIMO）慢速淡入淡出通道（CSI）中研究接收器设计。使用广义互信息（GMI）作为可实现的速率，我们研究了接收器采用某些最接近邻居解码规则的广义形式时的中断行为。我们的研究表明，线性缩小线性最小均值误差（LMMSE）估计值时，当接收天线的数量有限时，CSI的估计值降低了中断概率。只有在接收天线数量不带有界限的渐近状态下，CSI的LMMSE估计值才能最大程度地减少中断概率。数值结果表明，所提出的线性收缩接收器可实现明显的停电概率降低。
This paper studies receiver design in single-input multiple-output (SIMO) slow fading channels with imperfect channel state information (CSI) at the receiver only. Using generalized mutual information (GMI) as achievable rate, we study the outage behavior when the receiver employs certain generalized form of the nearest neighbor decoding rule. Our study reveals that linearly shrinking the linear minimum meansquared error (LMMSE) estimate of the CSI reduces the outage probability when the number of receive antennas is finite. Only in the asymptotic regime where the number of receive antennas grows without bound, the LMMSE estimate of the CSI minimizes the outage probability. Numerical results demonstrate that the proposed linear shrinkage receiver achieves evident outage probability reduction.
