Title :
Multi-User Water-Filling in Uplink OFDMA Systems
Author :
Chang, Sunny ; Kim, Seong-Lyun
Author_Institution :
Wireless Device Lab. Dong, Suwon
fDate :
March 31 2008-April 3 2008
Abstract :
In this paper, we focus on the optimal power allocation problem in the multi-user uplink OFDMA system. For the purpose, based on the KKT conditions of the problem, we design suboptimal algorithms that may be implementable in an iterative and distributive manner. An important feature of our algorithm is that it takes the generated interference to the system into account. Numerical examples show that our algorithms outperform the others, in terms of total throughput, outage probability and energy efficiency.
Keywords :
frequency division multiple access; iterative methods; probability; radio links; Karush-Kuhn-Tucker conditions; distributive manner; iterative manner; multiuser water-filling; optimal power allocation problem; outage probability; suboptimal algorithm design; uplink OFDMA systems; Base stations; Communications Society; Downlink; Interference; Iterative algorithms; Laboratories; OFDM; Power control; Resource management; Throughput;
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1997-5
DOI :
10.1109/WCNC.2008.342
