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The Poisson Channel With Varying Dark Current Known to the Transmitter

机译:变送器已知暗电流变化的泊松通道

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This paper studies the continuous-time Poisson channel whose dark current is random and may change for every tau-second time interval, where the actual values of the dark current are known to the transmitter as channel-state information (CSI). In the limit where tau tends to zero, the capacity gain provided by both causal and noncausal CSI is shown to vanish linearly with tau, so CSI at the transmitter provides almost no capacity improvement. The paper also considers a related problem of the state-dependent very noisy channel. In the very noisy limit, the capacity gain provided by noncausal CSI is shown to be the same as that provided by causal CSI.
机译:本文研究了连续时间的Poisson信道,该信道的暗电流是随机的,并且可能在每tau-second时间间隔内变化,其中暗电流的实际值被发射机称为信道状态信息(CSI)。在tau趋于零的极限中,因果和非因果CSI所提供的容量增益均显示为随tau线性消失,因此发射机处的CSI几乎没有提供容量改进。本文还考虑了与状态相关的非常嘈杂的信道的相关问题。在非常嘈杂的限制中,非因果CSI提供的容量增益显示为与因果CSI提供的容量增益相同。

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