R. Kennedy

TL;DR: The structure and performance of the optimal receiver are derived for the quantum detection of narrow-band coherent orthogonal and simplex signals and it is shown that modal photon counting is asymptotically optimum in the limit of a large signaling alphabet.

TL;DR: The objective is to describe some of the interrelations that affect the performance of a communication system used with probabilistic coding and their implication with regard to the evaluation of modulation and demodulation systems.

TL;DR: It is shown that the quantum-mechanical Cramer-Rao inequalities derived from right logarithmic derivatives and symmetrized logarathmic derivatives of the density operator give superior lower bounds on the error variances of individual unbiased estimates of arrival time and carrier frequency of a coherent signal.

TL;DR: A reasonable model for the atmosphere as an optical communication channel is presented and then reduced, with some approximation, to an equal-strength diversity system, demonstrating that the error probability depends strongly on the amount of turbulence.