Performance of User Selection in Cognitive Broadcast Channels

Author

Zhong, Caijun ; Ratnarajah, Tharm

Author_Institution

Inst. of Inf. & Commun. Eng., Zhejiang Univ., Hangzhou, China

Volume

60

Issue

12

fYear

2012

fDate

12/1/2012 12:00:00 AM

Firstpage

3529

Lastpage

3534

Abstract

This letter presents an analytical performance investigation on the cognitive broadcast channels (BC) with user selection. Exact closed-form expressions for the outage probability and multiuser interference diversity gain of the cognitive BC are derived. In addition, closed-form upper and lower bounds for the ergodic capacity of the system are presented. These analytical results not only provide fast and efficient means to evaluate the performance of the system, they also enable us to gain valuable insights on the impact of key parameters such as peak transmit power, interference temperature constraint, primary transmit power and channel fading parameters on the system performance.

Keywords

cognitive radio; diversity reception; fading channels; multiuser channels; probability; radiofrequency interference; channel fading parameter; closed-form expression; cognitive broadcast channel; ergodic capacity; interference temperature constraint; multiuser interference diversity gain; outage probability; peak transmit power; performance evaluation; primary transmit power; user selection; Capacity planning; Cognitive radio; Fading; Gain; Interference; Random variables; Upper bound; Cognitive radio; cognitive broadcast channels; ergodic capacity; outage probability; user selection;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2012.100912.110161

Filename

6336766