Two concatenated coding schemes for ARQ protocols

The application of concatenated coding to increase throughput in automatic repeat request (ARQ) protocols is described. In the proposed schemes, which are implemented with an inner error detection-correction code and an outer error-detection code, the inner code´s dual-function structure significantly enhances ARQ efficiency, especially in cases of high communication channel error rate. Results of a comparative analysis show that the proposed schemes outperform other similar ARQ protocols.