Title :
Maximum diversity order in cooperative MAC for general modulation schemes
Author :
Ho, Chin Keong ; Tan, Peng Hui ; Sun, Sumei
Author_Institution :
Inst. for Infocomm Res., A*STAR, Singapore, Singapore
fDate :
12/1/2009 12:00:00 AM
Abstract :
We consider two sources that cooperatively send their messages to a destination over Rayleigh-fading channels. Assuming a decode-and-forward scheme, we obtain conditions to achieve the maximum diversity order for a general class of modulation schemes. This class includes the BPSK modulation where the mutual information is bounded, and Gaussian signaling where the mutual information is unbounded. With mutual information that is bounded, clearly the maximum achievable rate is limited; interestingly, our results quantify the exact conditions for the diversity order to be fundamentally limited.
Keywords :
Rayleigh channels; access protocols; diversity reception; multi-access systems; phase shift keying; BPSK modulation; Gaussian signaling; Rayleigh-fading channels; cooperative MAC; cooperative multiple access channel; decode-and-forward scheme; general modulation schemes; maximum diversity order; Access protocols; Binary phase shift keying; Decoding; H infinity control; Mutual information; Phase modulation; Rayleigh channels; Relays; Sufficient conditions; Sun; Cooperation diversity, cooperative multiple-access channel, practical modulations, BPSK modulation;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2009.12.091222