A Performance Analysis for Adaptive Rate, Trellis Coded Hybrid-ARQ Protocols

Hybrid-ARQ protocols me known to improve the reliability of communication systems at the expense of the total throughput. Systems based on trellis coded modulation (TCM) can be modified for use in type-I hybrid-ARQ schemes. In order to regain some of the lost throughput due to retransmission request...

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Bibliographic Details
Main Authors: Rasmussen, L.K., Wicker, S.B.
Format: Conference Proceeding
Language:English
Subjects:
Automatic repeat request
Bit error rate
Decoding
Diversity reception
Modulation coding
Performance analysis
Protocols
Quadrature phase shift keying
Throughput
Upper bound
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Summary:Hybrid-ARQ protocols me known to improve the reliability of communication systems at the expense of the total throughput. Systems based on trellis coded modulation (TCM) can be modified for use in type-I hybrid-ARQ schemes. In order to regain some of the lost throughput due to retransmission requests, various adaptive code rate algorithm can be applied. In this paper the concept of averaged diversity combining is considered. Multiple received copies of the same data packet are combined on a symbol-by-symbol basis to improve the performance. A simple example of an adaptive rate, TCM hybrid-ARQ protocol is developed and performance bounds on both bit error rate and throughput are derived for AWGN channels. To verify the bounds simulation results have been obtained and are presented.
DOI:10.1109/ISIT.1993.748700