Abstract
In this paper, we focus on the design of differential amplitude/phase modulation schemes by a look-up table for Rayleigh fading channels. In the first part of this paper, we first propose the noncoherent distance measure for each two signal vectors based on the maximum-likelihood (ML) signal detection under Rayleigh fading channels. The design criterion/procedure of the look-up table is then investigated. In the second part of this paper, linear dispersion codes are used to construct a multidimensional differential amplitude/phase modulation scheme, with the aid of the genetic algorithm. Both schemes are shown to provide improvements in error performance, when comparing to the conventional scheme provided in the literature. Copyright © 2013 by the Institute of Electrical and Electronic Engineers, Inc.