DMCA
Differential transmission for amplifyand-forward cooperative communications (2005)
| Venue: | Table of Integrals, Series, and Products |
| Citations: | 31 - 3 self |
BibTeX
@INPROCEEDINGS{Himsoon05differentialtransmission,
author = {Thanongsak Himsoon and Student Member and Weifeng Su and K. J. Ray Liu},
title = {Differential transmission for amplifyand-forward cooperative communications},
booktitle = {Table of Integrals, Series, and Products},
year = {2005},
pages = {597--600},
publisher = {Academic Press}
}
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Abstract
Abstract—In this letter, we propose a differential amplify-andforward (AF) transmission scheme for a two-user cooperative communications system. By efficiently combining signals from both direct and relay links, the proposed scheme provides superior performance compared to those of direct transmissions with either differential detection or coherent detection. While the exact biterror-rate (BER) formulation of the proposed scheme is not available currently, we provide, as a performance benchmark, an exact BER formulation and its simple bounds for a case of optimumcombining cooperation system with differential M-ary phase-shift keying (DMPSK) signals. The optimum power allocation is also determined based on the provided BER formulations. We show that the proposed differential cooperative transmission scheme together with the optimum power allocation yields comparable performance to the optimum-combining scheme. Simulation results show that the proposed differential scheme with optimum power allocation yields significant performance improvement over that with an equal power allocation scheme. Index Terms—Amplify-and-forward protocol, cooperative diversity, differential modulation, performance analysis. I.
Keyphrases
amplifyand-forward cooperative communication differential transmission optimum power allocation index term amplify-and-forward protocol differential amplify-andforward differential modulation cooperative diversity optimum-combining scheme performance analysis performance benchmark differential scheme simple bound differential cooperative transmission scheme provided ber formulation exact ber formulation cooperation system superior performance differential m-ary phase-shift keying direct transmission exact biterror-rate relay link simulation result equal power allocation scheme two-user cooperative communication system differential detection proposed scheme transmission scheme coherent detection
