Multiplex adaptativo por divisão em códigos com controle híbrido de erros Arq/Fec.

Abstract

This thesis presents the hardware and software implementation of a Coding Division Multiplexing System with hybrid error control. An adaptative exchange of channel capacity and error control capability is used in order to avoid the allocation of extra redundant bits . A greater NDT with respect to ARQ systems and a greater reliability with respect to FEC systems is achieved. A walsh function variable redundant code is used. The hardware and software details together with the theoretical conceptsion and results obtained for the system are presented.