Combining of orthogonal coding and quadrature amplitude modulation

Abstract

Noise immunity is one of the most important characteristics of modern information transmission systems. There is a contradiction between the requirements for the noise immunity of radio engineering systems, due to the capabilities of countermeasures, and the lack of methods for increasing the noise immunity at high spectral efficiency and coding rate. The research of ways to increase noise immunity at a fixed transmission rate through the development of special mathematical methods is an actual task.