NDLI: Dynamic Resource Allocation in OFDMA Uplink for MAI Mitigation and Throughput Improvement

Content Provider	IEEE Xplore Digital Library
Author	Hieu Le Behboodi, A. Wolisz, A.
Copyright Year	2014
Description	Author affiliation: Dept. of Telecommun. Syst., Tech. Univ. of Berlin, Berlin, Germany (Hieu Le; Behboodi, A.; Wolisz, A.)
Abstract	In OFDMA uplink, Multiple Access Interference (MAI) caused by synchronization offsets in user signals can considerably degrade user throughputs. In this paper, we investigate the problem of applying Dynamic Resource Allocation (DRA) to mitigate MAI and simultaneously improve user throughputs. Firstly, we introduce a novel solvable optimization problem (OP) following DRA to maximize the minimum user throughput. Using this proposed OP, we show the optimal resource allocation schemes can increase minimum user throughput up to 300% compared to existing DRA heuristics, and to 25% compared to the estimation and correction based approach. Secondly, by investigating the frequency assignment, we show an insight about the advantage of DRA in uplink, where better exploitation of frequency and multiuser diversities leads to efficient MAI mitigation and significant throughput gain. Finally, we introduce suboptimal OPs to reduce the complexity, among that the one based on chunking can significantly reduce the complexity and still provide comparable throughput gain.
Starting Page	1
Ending Page	5
File Size	199285
Page Count	5
File Format	PDF
ISBN	9781479944491
DOI	10.1109/VTCFall.2014.6965949
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-14
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Throughput OFDM Uplink Frequency diversity Time-frequency analysis Resource management Synchronization
Content Type	Text
Resource Type	Article

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