Outage Analysis of Cognitive Multihop Networks under Interference Constraints

Vo Nguyen Quoc BAO  Trung Quang DUONG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E95-B   No.3   pp.1019-1022
Publication Date: 2012/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.1019
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
decode-and-forward,  underlay,  multihop communication,  assisted relay networks,  cognitive radio,  

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Summary: 
In this letter, we consider a cognitive radio based multihop network under the spectrum sharing underlay paradigm. By taking into account the interference constraints, we present an exact closed-form expression for outage probability, which is valid for the whole signal-to-noise ratio regime. In addition, some numerical examples of interest that study the effect of the number of hops and/or the interferer threshold on primary users are illustrated and discussed. Numerical results show that multihop systems still offer a considerable gain as compared to direct transmission under the same limit of interference.