Research on the Transmission Performance of Multi - hop Cognitive System

By analyzing the multi-hop cooperative diversity cognitive network in Underlay Sharing(US) mode, an approximate outage probability formulation and diversity order has been derived for decode-and-forward(DF) protocol in high signalto-noise ratio. As DF protocol cannot achieve space diversity gain, mo...

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Bibliographic Details
Published in:Journal of engineering science and technology review 2013-12, Vol.6 (3), p.122-127
Main Authors: Sai - qiu, GUO, Jing - min, TANG
Format: Article
Language:English
Subjects:
cognitive network
outage probability
space diversity
diversity gain
Online Access:Get full text
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Summary:By analyzing the multi-hop cooperative diversity cognitive network in Underlay Sharing(US) mode, an approximate outage probability formulation and diversity order has been derived for decode-and-forward(DF) protocol in high signalto-noise ratio. As DF protocol cannot achieve space diversity gain, modified multi-hop selective decode-andforward(SDF) protocol is proposed and an approximate outage probability formulation and diversity order are deduced for SDF cognitive protocol to improve system performance. Theoretical analysis and simulation result show that the SDF protocol can decrease cognitive network outage probability and achieve the full space diversity gain contrasted with DF protocol.
ISSN:1791-9320
1791-2377
1791-2377
DOI:10.25103/jestr.063.22