Efficient Partial Single Relay Selection Scheme for Wireless Communications

Sung-Bok CHOI
Young-Hwan YOU
Hyoung-Kyu SONG

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E98-A    No.3    pp.923-926
Publication Date: 2015/03/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E98.A.923
Type of Manuscript: LETTER
Category: Communication Theory and Signals
relay selection,  cooperative diversity,  cell coverage extension,  decode-and-forward,  

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Many wireless communication systems use a relay station for cooperative diversity or cell coverage extension. In this letter, an efficient partial single relay selection scheme is proposed for wireless communications. The conventional schemes such as the best harmonic mean and the threshold-based relay selection should know channel state informaion (CSI), or noise variance at all stations in advance. But the proposed scheme does not require any priori information. It uses a characteristic of the repeated signal pattern at candidates of the relay station. Simulation results show that the performance of proposed scheme is very close to the best harmonic mean relay selection scheme as one of the optimal relay selection schemes.