Optimal power allocation and relay selection in two-way multi-relay cooperative communication

Author

Shakeri, Reza ; Taherpour, Abbas ; Khakzad, Hamidreza ; Khattab, Tamer

Author_Institution

Dept. of Electr. Eng., Imam Khomeini Int. Univ., Qazvin, Iran

fYear

2013

fDate

17-20 Nov. 2013

Firstpage

339

Lastpage

344

Abstract

In this paper, we investigate the power allocation in two-way multi-relay assisted cooperative network in which the relays operate in decode-and-forward (DF) protocol. In the proposed method for choosing the best relay there is no need for channel state information (CSI) in transmitter terminals. Based on the minimum of the channel coefficients between source-relay and relay-destination, we choose the relay which its associated minimum coefficient is maximum among all the relays. We derive a closed form expression for bit error rate (BER) in cooperative networks with two-way relays according to our proposed algorithm for relay selection. Optimum power allocation between sources and selected relay yields to almost 2dB improvement in BER performance.

Keywords

cooperative communication; error statistics; optimisation; relay networks (telecommunication); BER; bit error rate; channel coefficient; closed form expression; decode and forward protocol; multirelay cooperative communication; optimal power allocation; relay selection; two way cooperative communication; Binary phase shift keying; Bit error rate; Conferences; Relays; Resource management; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

GCC Conference and Exhibition (GCC), 2013 7th IEEE

Conference_Location

Doha

Print_ISBN

978-1-4799-0722-9

Type

conf

DOI

10.1109/IEEEGCC.2013.6705801

Filename

6705801