Performance of user selection in cognitive broadcast channels

Caijun Zhong*, Tharm Ratnarajah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Article number6336766
Pages (from-to)3529-3534
Number of pages6
JournalIEEE Transactions on Communications
Volume60
Issue number12
DOIs
Publication statusPublished - 12 Nov 2012

Keywords

  • cognitive broadcast channels
  • Cognitive radio
  • ergodic capacity
  • outage probability
  • user selection

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