Title :
Outage Probability and DMT Performance of Underlay Cognitive Networks with Incremental DF and AF Relaying over Nakagami-m Fading Channels
Author_Institution :
Dept. of Electron. Eng., Nat. Kaohsiung Univ. of Appl. Sci., Kaohsiung, Taiwan
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;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.111413.132001
