BER Performance Analysis of Cooperative DaF Relay Networks and a New Optimal DaF Strategy

Author

Ropokis, George A. ; Rontogiannis, Athanasios A. ; Berberidis, Kostas

Author_Institution

Inst. for Space Applic. & Remote Sensing, Nat. Obs. of Athens, Athens, Greece

Volume

10

Issue

4

fYear

2011

fDate

4/1/2011 12:00:00 AM

Firstpage

1044

Lastpage

1049

Abstract

An analytical bit error rate (BER) performance study of three detect-and-forward (DaF) policies under a common framework is presented in this paper. More specifically, the direct, thresholded and link-adaptive schemes are studied, which differ in the way the decision on the transmitted symbol is forwarded from the relay to the destination. The analysis is carried out for a single relay DaF transmission protocol and takes into account the symbol decision errors that may occur at the relay. Simple closed-form analytical BER expressions are derived for all three schemes, which are completely verified by simulations. Moreover, by minimizing a properly selected conditional BER expression, a novel optimal DaF strategy is proposed, which outperforms all previously known related methods.

Keywords

cooperative communication; error statistics; radio networks; transport protocols; BER performance analysis; analytical bit error rate performance; cooperative DaF relay networks; detect-and-forward policies; link-adaptive schemes; optimal DaF strategy; single relay DaF transmission protocol; symbol decision errors; thresholded schemes; Analytical models; Bit error rate; Quadrature amplitude modulation; Receivers; Relays; Signal to noise ratio; Symmetric matrices; BER performance; Cooperative networks; detect-and-forward; regenerative relays;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2011.020811.101344

Filename

5719527