Some new hybrid ARQ techniques for high error rate conditions
G. Benelli · International Journal of Satellite Communications · 1989
Abstract Some new hybrid ARQ schemes for error control in communication systems are presented in which redundancy, achieved by retransmission of a code word, is exploited to facilitate correct code‐word recovery. In the first two techniques, applicable to cases in which a code word detected in error is retransmitted several times consecutively, an error‐correcting code is used in conjunction with a normal ARQ code to enhance performance even at high error rates. These two techniques have been modified to allow application to protocols in which only one copy is sent each time a code word must be transmitted. Theoretical analysis of the protocols shows that these techniques outperform similar ARQ schemes, particularly for high error rates.