NDLI: A proportional-fair power allocation scheme for fair and efficient multiuser OFDM systems

Content Provider	IEEE Xplore Digital Library
Author	Seo, H. Byeong Gi Lee
Copyright Year	2004
Description	Author affiliation: Sch. of Electr. Eng., Seoul Nat. Univ., South Korea (Seo, H.; Byeong Gi Lee)
Abstract	In this paper we investigate adaptive resource allocation schemes in multiuser OFDM systems for fair share of resources and efficient operation. We employ the CDF-based scheduling (CS) algorithm for the subcarrier allocation, taking advantage of its distinctive feature of analyzability and multiuser diversity. Noting that conventional power allocation schemes do not exhibit efficient and fair operations in heterogeneous user channel environments, we present a new algorithm called proportional-fair power allocation (PFPA). This algorithm is designed to allocate transmission power in such a way that the resulting relative throughput-increment is identical for all subcarriers. The PFPA algorithm is shown to be equivalent to the power allocation of the asymptotically optimal algorithm which exhibits the largest achievable region in the asymptotic case. Numerical results reveal that the combined CS-PFPA algorithm improves the overall system capacity in terms of time-average throughput and provides efficient estimation of user performance. Further, the CS-PFPA algorithm can meet each user's requirements using a minimum amount of resources, so it renders an efficient and fair means for resource allocation in multiuser OFDM systems.
Starting Page	3737
Ending Page	3741
File Size	558633
Page Count	5
File Format	PDF
ISBN	0780387945
DOI	10.1109/GLOCOM.2004.1379067
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Resource management Algorithm design and analysis Throughput Scheduling algorithm Intersymbol interference Bandwidth Narrowband Statistical distributions Downlink
Content Type	Text
Resource Type	Article

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