A New Efficient Low-Complexity Scheme for Multi-Source Multi-Relay Cooperative Networks

This paper proposes a new efficient scheme for the combined use of cooperative diversity and multiuser diversity. Considering a decode-and-forward (DF) opportunistic relaying strategy, we first study the outage behavior of the joint source-relay-selection scheme with/without direct links, from which...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2011-02, Vol.60 (2), p.716-722
Main Authors: Haiyang Ding, Jianhua Ge, Benevides da Costa, Daniel, Zhuoqin Jiang
Format: Article
Language:English
Subjects:
Access methods and protocols, osi model
Amplification
Applied sciences
Availability
Channels
Connection and protection apparatus
Cooperative diversity
Cooperative systems
diversity order
Diversity reception
Electrical engineering. Electrical power engineering
Electrical power engineering
Exact sciences and technology
Joints
Links
Multiuser detection
multiuser diversity (MUD)
Networks
Operation. Load control. Reliability
outage behavior
Outages
Power networks and lines
Relaying
Relays
Signal to noise ratio
Strategy
Studies
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Transmission and modulation (techniques and equipments)
Wireless networks
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Summary:This paper proposes a new efficient scheme for the combined use of cooperative diversity and multiuser diversity. Considering a decode-and-forward (DF) opportunistic relaying strategy, we first study the outage behavior of the joint source-relay-selection scheme with/without direct links, from which the significance of the direct links is recognized. Motivated by the crucial role of these links on the system performance, a two-step selection scheme is proposed, which first selects the best source node based on the channel quality of the direct links and then selects the best link from the selected source to the destination. The proposed scheme significantly reduces the amount of channel estimation while achieving comparable outage performance to that using the joint selection scheme. Most importantly, the achieved diversity order is the same as that using the joint selection scheme. In addition, assuming an amplify-and-forward (AF) opportunistic relaying strategy, the outage behavior of this two-step scheme is also analyzed, and its availability is confirmed as well.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2010.2100416