3-Hop Cooperative Diversity Using Quasi-Orthogonal Space-Time Block Code

Tomoya YAMAOKA  Yoshitaka HARA  Noriyuki FUKUI  Hiroshi KUBO  

IEICE TRANSACTIONS on Communications   Vol.E93-B    No.6    pp.1636-1640
Publication Date: 2010/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.1636
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
cooperative diversity,  multi-hop,  quasi-orthogonal space-time block code,  

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We propose 3-hop cooperative diversity using QOSTBC (Quasi-Orthogonal Space-Time Block Code), which offers 3-hop cooperative diversity without signal separation in relay nodes. The key of our proposed scheme is encoding signal sequence in different signal unit according to relay stage. This letter explains details of the proposed scheme and shows that it offers interference reduction among streams and space diversity gain by result of simulations.