Optimal Relay Selection for Outdated CSI

Author

Michalopoulos, Diomidis S. ; Ng, Jason ; Schober, Robert

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada

Volume

17

Issue

3

fYear

2013

fDate

Mar-13

Firstpage

503

Lastpage

506

Abstract

Consider the scenario of relay selection in an environment where the channel estimates are outdated, yet their reliability is known. For this scenario, we propose the optimal relay selection policy, in a minimum outage probability sense. We show that, if the reliabilities of the channel estimates are dissimilar across the relays, this policy offers a noteworthy improvement in terms of array gain, when compared to conventional selection policies. Analytical outage probability expressions are provided, which are corroborated by simulations.

Keywords

channel estimation; probability; relay networks (telecommunication); telecommunication network reliability; analytical outage probability expressions; array gain; channel estimates reliability; conventional selection policy; minimum outage probability sense; noteworthy improvement; optimal relay selection policy; outdated CSI; Channel estimation; Correlation; Estimation; Probability density function; Relays; Reliability; Signal to noise ratio; Outdated CSI; relay selection;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2013.011513.122468

Filename

6414577