Methods for packet combining in HARQ systems over bursty channels

  • Authors:
  • Abdel-Ghani A. Daraiseh;Carl W. Baum

  • Affiliations:
  • Wireless Systems Engineering Department, Northern Telecom, Richardson, TX;Department of Electrical and Computer Engineering, Clemson University, Clemson, SC

  • Venue:
  • Mobile Networks and Applications
  • Year:
  • 1997

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Abstract

The performance of ARQ systems can be improved by combining current and prior transmissions at the receiver. Two techniques for combining outputs in a packet-based communication system are presented. In both techniques the fundamental unit of retransmission is a packet, and the fundamental unit of combining is a codeword. The techniques are analyzed for a bursty channel and a system that employs Reed--Solomon coding and bounded-distance errors-and-erasures decoding. Performance results show that the packet-combining schemes provide significant gains in throughput and reductions in error probability when compared with a system that does not employ combining.