Outage Probability and DMT Performance of Underlay Cognitive Networks with Incremental DF and AF Relaying over Nakagami-m Fading Channels

Author

Shao-I Chu

Author_Institution

Dept. of Electron. Eng., Nat. Kaohsiung Univ. of Appl. Sci., Kaohsiung, Taiwan

Volume

18

Issue

1

fYear

2014

fDate

Jan-14

Firstpage

62

Lastpage

65

Abstract

This letter studies the outage performance of cognitive radio systems with incremental decode-and-forward (DF) and amplify-and-forward (AF) relaying in a Nakagami-m fading environment. The outage behavior and diversity-multiplexing tradeoff (DMT) are investigated. These results indicate that the DMT is irrelevant to the primary user and the secondary system can achieve the full diversity order. Simulation results substantiate the accuracy of our analysis. The presented method/steps for performance evaluation are applicable to other fading channels.

Keywords

Nakagami channels; amplify and forward communication; cognitive radio; decode and forward communication; diversity reception; multipath channels; multiplexing; probability; radio spectrum management; radiofrequency interference; relay networks (telecommunication); DMT; DMT performance evaluation; Nakagami-m fading channels; cognitive radio systems; diversity-multiplexing tradeoff; full diversity order; incremental AF relaying; incremental DF relaying; incremental amplify-and-forward relaying; incremental decode-and-forward relaying; interference problem avoidance; multipath fading; outage behavior; outage probability; spectrum utilization improvement; underlay cognitive networks; Fading; Materials requirements planning; Multiplexing; Probability density function; Protocols; Relays; Signal to noise ratio; Incremental relaying; diversity-multiplexing tradeoff (DMT); outage probability;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2013.111413.132001

Filename

6676773