An energy aware resource allocation for cognitive radio OFDMA systems. (1st January 2014)

• Record Type: Journal Article
• Authors: Chen, Xiaomao; Ouyang, Shan; Chen, Ziqiang
• Is Part Of: International journal of communication networks and distributed systems. Volume 13:Number 3/4(2014)
• Page Start: 335
• Page End: 343
• Publication Date: 2014-01-01
• Subjects: orthogonal frequency division multiple access -- OFDMA -- cognitive radio -- quality of service -- QoS -- resource allocation; Computer networks -- Periodicals; Telecommunication systems -- Periodicals; Electronic data processing -- Distributed processing -- Periodicals; 004.6
• Languages: English
• ISSNs: 1754-3916

Abstract

Multi-user orthogonal frequency division multiple access (OFDMA) network adaptive resource allocation is proposed. Subcarriers are assigned to each user in a way that ensures better spectrum efficiency; everyone is allocated power with quality of service (QoS) guarantees, while users' minimum rate requirements are met. Optimum transmit power of user is obtained by Lagrange method, validity of the time-share and corresponding hard mapping method are verified by simulation, the proposed algorithm can adapt allocate resource, minimising total transmit power.