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Wireless Personal Communications
Erschienen in: Wireless Personal Communications 1/2016

30.06.2016

On the Performance of Opportunistic Relay Selection in Cognitive Radio Networks with Primary User’s Interference and Direct Channel

verfasst von: Khuong Ho-Van, Lien Pham-Hong, Son Vo-Que, Tra Luu-Thanh

Erschienen in: Wireless Personal Communications | Ausgabe 1/2016

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Abstract

This paper analyzes outage performance of opportunistic relay selection in cognitive radio networks with primary user’s interference and direct channel over independent non-identically distributed fading channels and under maximum transmit power constraint and interference power constraint. Exact analysis is firstly proposed and then extended to asymptotic analysis to have insights into important performance metrics such as coding gain and diversity order. The proposed analysis can also be applied to corresponding analysis for opportunistic relay selection in cognitive radio networks with PU’s interference and without direct channel to highlight the usefulness of direct channel in relaying communications without any sacrifice of power and bandwidth. A multitude of results illustrate an achievable full diversity order, a considerable system performance deterioration due to primary user’s interference but this deterioration can be drastically remedied by increasing the number of involved relays, and the superiority of opportunistic relay selection with direct channel to that without it.
Vorheriger Artikel A Multipath Prefix Routing for Wireless Sensor Networks
Nächster Artikel A New Construction Method for Large Girth Quasi-Cyclic LDPC Codes with Optimized Lower Bound using Chinese Remainder Theorem

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Fußnoten
1
This paper focuses on the DF relays in cooperative cognitive networks and hence, relay selection schemes with the AF relays (e.g., [23‐28]) or in dual-hop cognitive networks (e.g., [29‐32]) are not necessarily surveyed.
 
2
As will be shown in the next section, both PU’s interference and direct channel induce received SINRs to be correlated, making the analysis more complicated but more general and practical.
 
3
That means that \(\lambda _{pq}\)’s are partitioned into groups of equal value. For instance, \(\lambda _{sk}\)’s, \(\lambda _{kd}\)’s, \(\lambda _{kr}\)’s, \(\lambda _{tk}\)’s with \(k\in {\mathcal {R}}\) are assumed to be equal in [9‐11, 13, 18, 31, 40‐43].
 
4
That means that \(\lambda _{pq}\)’s, \(\forall \{p,q\}\) are equal in [14, 16, 19, 33].
 
5
\(\mathcal {R}[j]\) denotes the jth element of the set \(\mathcal {R}\).
 
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Metadaten
Titel
On the Performance of Opportunistic Relay Selection in Cognitive Radio Networks with Primary User’s Interference and Direct Channel
verfasst von
Khuong Ho-Van
Lien Pham-Hong
Son Vo-Que
Tra Luu-Thanh
Publikationsdatum
30.06.2016
Verlag
Springer US
Erschienen in
Wireless Personal Communications / Ausgabe 1/2016
Print ISSN: 0929-6212
Elektronische ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-016-3464-9

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