Outage Probability of Decode-and-Forward Relaying with Optimum Combining in the Presence of Co-Channel Interference and Nakagami Fading

Author

Suraweera, Navod ; Beaulieu, Norman C.

Author_Institution

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

Volume

2

Issue

5

fYear

2013

fDate

Oct-13

Firstpage

495

Lastpage

498

Abstract

The performance of optimum combining (OC) used in a decode-and-forward relay network over Nakagami-m fading channels in the presence of co-channel interference at the relay nodes and at the destination is analyzed. A closed-form expression is derived for the exact outage probability. It is found that OC cannot be used to achieve end-to-end diversity gain when interference is present at single-antenna relays, but the outage probability floor at the destination receiver is lowered by the OC. If the interference is present only at the destination, diversity gains can be achieved using OC. The performance of OC is compared with maximal-ratio combining (MRC) and OC achieves diversity gain if interference is present only at the destination node, whereas MRC does not.

Keywords

Nakagami channels; antennas; cochannel interference; decode and forward communication; diversity reception; probability; relay networks (telecommunication); Nakagami-m fading channels; OC performance; a decode-and-forward relay network; closed-form expression; cochannel interference; destination node; destination receiver; end-to-end diversity gain; exact outage probability; maximal-ratio combining; optimum combining; single-antenna relays; Co-channel interference; Nakagami-m fading; decode-and-forward relaying; optimum combining; outage probability;

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/WCL.2013.061213.130313

Filename

6544196