On the Combination of Cooperative Diversity and Multiuser Diversity in Multi-Source Multi-Relay Wireless Networks

Author

Sun, Li ; Zhang, Taiyi ; Lu, Long ; Niu, Hao

Author_Institution

Dept. of Inf. & Commun. Eng., Xi´´an Jiaotong Univ., Xi´´an, China

Volume

17

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

535

Lastpage

538

Abstract

This letter presents an analysis of the combined use of cooperative diversity and multiuser diversity (MUD) in multi-source multi-relay networks. A joint selection scheme, which selects the best source-relay pair to access the channel, is proposed. The main contribution of our work is the derivation of the exact and asymptotic expressions for the outage probability of the system with amplify-and-forward (AF) protocol. From these expressions it is indicated that the total diversity order of M +N can be achieved, where M and N are the number of source nodes and relay nodes, respectively. Based on the outage probability in high signal-to-noise-ratio (SNR) region, the optimum power allocation scheme is also given to improve the system performance.

Keywords

diversity reception; probability; protocols; radio networks; amplify-and-forward protocol; cooperative diversity; joint selection scheme; multisource multirelay wireless network; multiuser diversity; optimum power allocation scheme; outage probability; signal-to-noise-ratio; source-relay pair; Cooperative diversity; diversity order; multiuser diversity; power allocation;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2010.2046350

Filename

5437266