Soft-decision-and-forward protocol for cooperative communication networks based on Alamouti code

Authors:
Jae-Dong Yang;Kyoung-Young Song;Jong-Seon No;Dong-Joon Shin
Affiliations:
Samsung Electronics Co., Ltd., Suwon, Gyeonggi-do, Korea;Department of EECS, INMC, Seoul National University, Seoul, Korea;Department of EECS, INMC, Seoul National University, Seoul, Korea;Department of ECE, Hanyang University, Seoul, Korea
Venue:
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 2
Year:
2009

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Abstract

A cooperative protocol called soft-decision-and-forward (SDF) is introduced. SDF protocol exploits the soft decision values of the received signal at the relay node. Alamouti code is used for orthogonal transmission and distributed space-time codes are designed for non-orthogonal transmission. The maximum likelihood decoders with low decoding complexity are proposed. From simulations, it can be seen that SDF protocol outperforms AF protocol.