A performance analysis of trellis coded hybrid-ARQ protocols in a fading environment

A method is described for modifying trellis coded modulation systems for use in type-I hybrid ARQ protocols over slowly fading Rician channels. The difference in the metrics between the surviving path and the nonsurvivors throughout the trellis can be used to determine the desirability of retransmis...

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Bibliographic Details
Main Authors: Rasmussen, L.K., Wicker, S.B.
Format: Conference Proceeding
Language:English
Subjects:
AWGN
Convolutional codes
Fading
Maximum likelihood decoding
Modulation coding
Performance analysis
Protocols
Rician channels
Signal analysis
Throughput
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Summary:A method is described for modifying trellis coded modulation systems for use in type-I hybrid ARQ protocols over slowly fading Rician channels. The difference in the metrics between the surviving path and the nonsurvivors throughout the trellis can be used to determine the desirability of retransmission requests. Bounds on the reliability and throughput performance of the resulting error control scheme are then derived for slowly fading Rician channels. Examples are included to illustrate the achievable gain compared to ordinary forward error control (FEC) trellis-coded transmission. Schemes based on ordinary and multiple trellis-coded modulation are compared over several different Rician fading channels.< >
DOI:10.1109/GLOCOM.1992.276392