Capacity Analysis of Cognitive Relay Networks with the PU´s Interference

Author

Si, JiangBo ; Li, Zan ; Huang, HaiYan ; Chen, JunJie ; Gao, Rui

Author_Institution

Integrated Service Networks Lab., Xidian Univ., Xian, China

Volume

16

Issue

12

fYear

2012

fDate

12/1/2012 12:00:00 AM

Firstpage

2020

Lastpage

2023

Abstract

In this letter, with the primary user´s (PU´s) interference, we investigate the performance of the secondary user (SU) in spectrum sharing cognitive relay networks. Considering the correlation among the received interference plus noise ratios (SINRs) at the relays and SU destination, closed-form expressions for the outage probability and capacity of the SU are derived. It is shown that, though the interference from the PU badly degrades the SU´s performance, an increase of the number of relays can compensate the loss. Finally, simulation results are provided to validate our theoretical analysis.

Keywords

cognitive radio; probability; radiofrequency interference; relay networks (telecommunication); PU interference; SINR; SU destination; closed-form expressions; cognitive relay network capacity analysis; loss compensation; outage probability; primary user interference; received interference plus noise ratios; secondary user; spectrum sharing cognitive relay networks; Capacity planning; Closed-form solutions; Fading; Interference; Relays; Signal to noise ratio; Cognitive relay networks; capacity; outage probability; spectrum sharing;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.111412.121978

Filename

6355005