A Simple Cooperative Relaying with Alamouti Coded Transmission

Tomoya YAMAOKA  Yoshitaka HARA  Noriyuki FUKUI  Hiroshi KUBO  Takaya YAMAZATO  

IEICE TRANSACTIONS on Communications   Vol.E95-B    No.2    pp.643-646
Publication Date: 2012/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.643
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
cooperative diversity,  Alamouti code,  ABBA code,  

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Cooperative diversity using space-time codes offers effective space diversity with low complexity, but the scheme needs the space-time coding process in the relay nodes. We propose a simple cooperative relay scheme that uses space-time coding. In the scheme, the source node transmits the Alamouti coded signal sequences and the sink node receives the signal sequence via the two coordinated relay nodes. At the relay nodes, the operation procedure is just permutation and forwarding of the signal sequence. In the proposed scheme, none of the relay nodes need quadrature detection and space-time coding and the simple relay process offers effective space diversity. Moreover, simulations show the effectiveness of the proposed relay process by some simulations.