Authors: Xiaomao Chen; Shan Ouyang; Ziqiang Chen
Addresses: School of Electronic Engineering, Xidian University, Xi'an, 710071, China ' Key Laboratory of Cognitive Radio and Information Processing, (Guilin University of Electronic Technology), Ministry of Education, Guilin, 541004, China ' Key Laboratory of Cognitive Radio and Information Processing, (Guilin University of Electronic Technology), Ministry of Education, Guilin, 541004, China
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.
Keywords: orthogonal frequency division multiple access; OFDMA networks; cognitive radio; quality of service; QoS; resource allocation; energy awareness; simulation.
International Journal of Communication Networks and Distributed Systems, 2014 Vol.13 No.3/4, pp.335 - 343
Received: 30 Jul 2013
Accepted: 18 Apr 2014
Published online: 30 Aug 2014 *