Outage Probability of Incremental Selection AF Relaying Scheme in Half-Duplex Cooperative Relay Networks

Jeehoon LEE  Minjoong RIM  Kiseon KIM  

Publication
IEICE TRANSACTIONS on Communications   Vol.E98-B   No.12   pp.2439-2445
Publication Date: 2015/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E98.B.2439
Type of Manuscript: PAPER
Category: Network
Keyword: 
incremental amplify-and-forward,  half-duplex cooperative relaying,  outage probability,  time-varying channel,  

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Summary: 
An incremental relaying protocol is a promising scheme for preventing the inefficient use of resources in half-duplex cooperative relay networks. In particular, the incremental selection amplify-and-forward (ISAF) relaying scheme is a well-designed protocol under the condition that the source-to-destination (SD) link is static during the two transmission phases. However, from a practical viewpoint, the SD link is not static but varies with time, and thus the ISAF relaying scheme may not work well in the field. In this work, we first show that the outage performance of the ISAF relaying scheme may decrease when the SD link is not static during the two transmission phases. We then propose a modified version of the ISAF relaying scheme which overcomes such a limitation of the ISAF relaying scheme under time-varying environments. Finally, numerical and simulation results are provided to support our findings.