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Improved Subcarrier Allocation Algorithm for Multiuser OFDM Systems  

Lee, Jae-Yoon (Dept. of Electronics & Computer Engineering Hanyang University)
Yoon, Dong-Weon (Dept. of Electronics & Computer Engineering Hanyang University)
Park, Sang-Kyu (Dept. of Electronics & Computer Engineering Hanyang University)
Hyun, Kwang-Min (Dept. of Information & Communication Engineering, Kangnung National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.44, no.9, 2007 , pp. 9-16 More about this Journal
Abstract
In the multiuser OFDM systems, an efficient resource allocation is necessary in order to provide the service to more users. This paper proposes u improved subcarrier allocation algorithm, satisfying each user's QoS under the limited resources, to maximize total transmission data rate and spectral efficiency. The proposed algorithm is divided into two steps. In the first step, users who are eligible for services are determined by using BER, user's minimum data rate requirement, and channel information. In the second step, first, subcarriers are allocated to users on the basis of channel state. And then, reallocation is fulfilled so that the total transmission data rate is maximized and the least reduction in the overall throughput is caused.
Keywords
Multiuser OFDM system; Resource allocation; Spectral efficiency; BER;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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