A simulation study of two bandwidth-efficient modulation techniques

A digital computer simulation package is developed for the comparative evaluation of two coded modulation systems over band-limited, nonlinear channels. The package consists of two main programs and a number of subroutine modules, each of which simulates the action of certain components in the system. The simulation utilizes a hybrid of deterministic and Monte Carlo approaches. A pseudorandom signal sequence is used in the simulation of band-limited channel effects, while independent sets of Gaussian noise samples are summed with the simulated received signal sequence in Monte Carlo experiments to observe the error performance of the coded modulation systems. The observations resulting from the simulation package are described.