Go-back-N ARQ scheme with buffer at the receiver

In the paper a new go-back-N scheme for communication systems using error-detecting codes is described. This scheme has a buffer at the receiver side in order to introduce a memory into the go-back-N protocol. This memory and a soft demodulation of each received symbol significantly increase the performance of classical go-back-N schemes. It is also shown that, for mean and high error rate conditions, the scheme proposed has a higher throughput than the selective scheme and, at the same time, a lower implementation conplexity.