Title :
A performance analysis of trellis coded hybrid-ARQ protocols in a fading environment
Author :
Rasmussen, Lars K. ; Wicker, Stephen B.
Author_Institution :
Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
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
Keywords :
fading; protocols; telecommunication channels; trellis codes; FEC; error control; fading environment; forward error control; gain; lower bound; performance analysis; reliability; retransmission requests; slowly fading Rician channels; throughput performance; trellis coded modulation; type-I hybrid ARQ protocols; upper bound; AWGN; Convolutional codes; Fading; Maximum likelihood decoding; Modulation coding; Performance analysis; Protocols; Rician channels; Signal analysis; Throughput;
Conference_Titel :
Global Telecommunications Conference, 1992. Conference Record., GLOBECOM '92. Communication for Global Users., IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0608-2
DOI :
10.1109/GLOCOM.1992.276392
