|標題:||On the Capacity of the Discrete-Time Poisson Channel|
Moser, Stefan M.
Institute of Communications Engineering
|關鍵字:||Channel capacity;direct detection;high signal-to-noise ratio (SNR);optical communication;photon;pulse amplitude modulation;Poisson channel|
|摘要:||The large-inputs asymptotic capacity of a peak-power and average-power limited discrete-time Poisson channel is derived using a new firm (nonasymptotic) lower bound and an asymptotic upper bound. The upper bound is based on the dual expression for channel capacity and the notion of capacity-achieving input distributions that escape to infinity. The lower bound is based on a lower bound on the entropy of a conditionally Poisson random variable in terms of the differential entropy of its conditional mean.|
|期刊:||IEEE TRANSACTIONS ON INFORMATION THEORY|