Performance improvement of layered modulation based cooperative relaying scheme

Authors:
Jee-Hoon Kim;Jung-In Baik;Jin-Hyuk Song;Hyoung-Kyu Song
Affiliations:
Sejong University, Seoul, South Korea;Sejong University, Seoul, South Korea;Sejong University, Seoul, South Korea;Sejong University, Seoul, South Korea
Venue:
Proceedings of the 6th ACM international symposium on Mobility management and wireless access
Year:
2008

Citing 4
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Abstract

Cooperative communication is a novel approach utilizing limited resources to get reliability. However, overall transmission-rate is reduced to have decomposable composition at the destination node in time-division multiple access (TDMA) system, which diminishes the advantage of cooperation. Recently, a novel use of layered modulation and an adequate cooperative space-time block code (C-STBC) were proposed to solve this drawback. Even though it provided certain level of diversity gain without transmission-rate loss, there is room for improvement. In this paper, we enhance it through the constellation modification and adaptive cooperation schemes. Their effectiveness is evaluated for the multi-band orthogonal frequency-division multiplexing (MB-OFDM) system.