Title :
A Trellis Coded Modulation Scheme for the Fading Relay Channel
Author :
Muralidharan, Vijayvaradharaj T. ; Rajan, B. Sundar
Author_Institution :
Dept. of ECE, Indian Inst. of Sci., Bangalore, India
Abstract :
A decode and forward protocol based Trellis Coded Modulation (TCM) scheme for the half-duplex relay channel, in a Rayleigh fading environment, is presented. The proposed scheme can achieve any spectral efficiency greater than or equal to one bit per channel use (bpcu). A near-ML decoder for the suggested TCM scheme is proposed. It is shown that the high Signal to Noise Ratio (SNR) performance of this near-ML decoder approaches the performance of the optimal ML decoder. Based on the derived Pair-wise Error Probability (PEP) bounds, design criteria to maximize the diversity and coding gains are obtained. Simulation results show a large gain in SNR for the proposed TCM scheme over uncoded communication as well as the direct transmission without the relay.
Keywords :
Rayleigh channels; codecs; decode and forward communication; protocols; trellis coded modulation; PEP bounds; Rayleigh fading environment; SNR; Trellis coded modulation scheme; bit per channel use; decode and forward protocol; fading relay channel; half-duplex relay channel; near-ML decoder; optimal ML decoder; pair-wise error probability; signal to noise ratio; uncoded communication; Decoding; Encoding; Fading; Labeling; Measurement; Relays; Signal to noise ratio;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2012 IEEE
Conference_Location :
Quebec City, QC
Print_ISBN :
978-1-4673-1880-8
Electronic_ISBN :
1090-3038
DOI :
10.1109/VTCFall.2012.6399165
