NEW ARQ PROTOCOLS USING CONCATENATED CODES

Concatenated coding techniques present attractive characteristics in m any real applications because of their high efficiency. In this paper, two new automatic-repeat-request (ARQ) protocols using a concatenated coding scheme are described. The structure, introduced in a codeword of a concatenated coding scheme, is used to improve the performance of ARQ protocols, especially for high error rates in the communication c hannel. The performance of the scheme described herein is derived thro ugh theoretical analysis. The results show that the proposed schemes o utperform other similar ARQ protocols.