Concatennated coding system for frequency-hopped spread-spectrum communication network

Abstract

This thesis is concerned with the application of concatenated coding to spread-spectrum communication networks in which the multiple-access capability is obtained through the use of frequency-hopped modulation with randomly chosen hopping pattern. The concatenated scheme we consider in this thesis uses an inner code to detect errors or to correct errors during the transmitting/receiving process. When errors are detected by the inner code, every symbols of the corresponding inner code is erased.Reed-Solomon code is employed as an outer code to correct erros (undetected erros) and the erasures (detected errors) generated by the inner code. The overall block error probabilities are examined to make performance comparisons of several schemes.