Multiuser Amplify-and-Forward relaying with delayed feedback in Nakagami-m fading

Author

Soysa, Madushanka ; Suraweera, Himal A. ; Tellambura, Chintha ; Garg, Hari K.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB, Canada

fYear

2011

fDate

28-31 March 2011

Firstpage

1724

Lastpage

1729

Abstract

This paper evaluates the impact of using outdated channel estimates in a multiuser Amplify-and-Forward (AF) relay network, under Nakagami-m fading. Both variable gain AF and fixed gain AF schemes are considered. Expressions for the system´s outage probability and the average bit error rate (BER) are derived. Since the expressions are barely tractable, we also present approximations for the high signal-to-noise ratio (SNR) regime. By doing so we characterize the impact of network parameters such as the number of relays, correlation between the delayed and current channel state information, chosen user rank and SNR imbalance on the performance degradation.

Keywords

Nakagami channels; amplify and forward communication; error statistics; multiuser channels; telecommunication network reliability; telecommunication network routing; Nakagami-m fading; average bit error rate; channel state information; delayed feedback; multiuser amplify-and-forward relaying; network parameters; outage probability; outdated channel estimates; signal-to-noise ratio; Approximation methods; Bit error rate; Correlation; Fading; Gain; Relays; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2011 IEEE

Conference_Location

Cancun, Quintana Roo

ISSN

1525-3511

Print_ISBN

978-1-61284-255-4

Type

conf

DOI

10.1109/WCNC.2011.5779395

Filename

5779395