Hybrid ARQ Coding with Packet Diversity – A Comparison

P. Raibroycharoen and E.V. Jones (UK)

Keywords

HybridARQ, packet diversity, turbodecoding stopping criteria, turbo codes

Abstract

This paper compares packet-diversity techniques for various error-detecting and correcting schemes. The arrangements analyzed combine forward error correction (FEC) using turbo-codes with automatic repeat request (ARQ) methods. The soft output of the turbo decoding process provides a measure of the reliability of a decoded packet, this enables packet diversity to be employed, whereby bits from more than one version of a received packet are combined to optimize error correction. Simulation results show that packet diversity with CRC error-detection provides good BER performance relative to other methods considered.

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