Optimal power allocation and allowable interference shaping in cognitive radio networks. (October 2018)

• Record Type: Journal Article
• Authors: Lee, Hyang-Won; Chang, Woohyuk; Jung, Bang Chul
• Is Part Of: Computers & electrical engineering. Volume 71(2018)
• Page Start: 265
• Page End: 272
• Publication Date: 2018-10
• Subjects: Cognitive radio system -- Multi-carrier -- Interference shaping -- Optimal power allocation -- Interference temperature; Computer engineering -- Periodicals; Electrical engineering -- Periodicals; Electrical engineering -- Data processing -- Periodicals; Ordinateurs -- Conception et construction -- Périodiques; Électrotechnique -- Périodiques; Électrotechnique -- Informatique -- Périodiques; Computer engineering; Electrical engineering; Electrical engineering -- Data processing; Periodicals; Electronic journals; 621.302854
• DOI: 10.1016/j.compeleceng.2018.07.015
• Languages: English
• ISSNs: 0045-7906

Abstract

Abstract: We investigate an interference management problem in multi-carrier cognitive radio systems. To this end, we propose a new framework for protecting primary users such that the primary user can shape the envelope of interference on each subcarrier. Furthermore, we introduce the concept of minimum individual interference budget that the primary user should allow on each subcarrier so that the secondary user can receive a certain quality of service. We develop a joint optimal transmit power and interference budget allocation algorithm for the primary user, which maximizes the throughput of the primary user. Through simulations, we show that our approach can provide better protection for primary users than the existing approach.