Title :
Capacity With Energy Constraint in Coherent State Channel
Author :
Hayashi, Masahito
Author_Institution :
Grad. Sch. of Inf. Sci., Tohoku Univ., Sendai, Japan
Abstract :
In this paper, we consider two kinds of energy constraints when the output state is a coherent state. Conventional constraint is a constraint on the total energy per a single communication mode. This paper proposes another energy constraints, which is a constraint on the total energy during a fixed period. The first setting can be easily dealt with by using the conventional capacity formula. This paper analyzes the second setting when the number of communication modes is or is not limited.
Keywords :
channel capacity; optical fibre networks; channel capacity; coherent state channel; communication mode; energy constraint; optical fibre network; Communications technology; Constraint theory; Error probability; High speed optical techniques; Information theory; Optical attenuators; Optical fiber communication; Optical fibers; Photonics; Quantum mechanics; Average error probability; coherent state; communication mode; energy constraint; information spectrum;
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.2010.2050805
