NDLI: Estimation of Carrier Frequency Offset for Generalized OFDMA Uplink Systems Using Particle Swarm Optimization Algorithms

Content Provider	IEEE Xplore Digital Library
Author	Tan-Hsu Tan Yung-Fa Huang Jia-Yang Tsao
Copyright Year	2009
Abstract	Orthogonal frequency division multiplexing (OFDM) has attracted much attention in wireless communications due to its many advantages. However, OFDM is very sensitive to carrier frequency offset (CFO) which can destroy the orthogonality among subchannels. For OFDMA uplink systems with generalized carrier assignment scheme (GCAS), there are multiple CFOs need to be estimated simultaneously. While ML approach is recognized as one possible solution to this problem, its computational complexity is too high to be implemented for practical applications. To overcome this difficulty, this study employs particle swarm optimization (PSO) algorithms to estimate CFOs for OFDMA uplink systems with GCAS. Furthermore, a PSO scheme integrated with the mutation operator of genetic algorithm (GA) is proposed to improve the performance of conventional PSO algorithm. Experimental result indicates that the proposed hybrid PSO algorithm can achieve the same performance as ML scheme but with much less computational complexity.
Starting Page	442
Ending Page	447
File Size	341260
Page Count	6
File Format	PDF
ISBN	9781424454037
e-ISBN	9781424454044
DOI	10.1109/I-SPAN.2009.26
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-12-14
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency estimation Particle swarm optimization OFDM Electronic mail Wireless communication Frequency division multiplexing Computational complexity Intersymbol interference Transmitters Base stations particle swarm optimization (PSO) Algorithm Orthogonal frequency division multiplexing (OFDM) orthogonal frequency division multiple access (OFDMA) generalized carrier assignment scheme (GCAS) carrier frequency offset (CFO)
Content Type	Text
Resource Type	Article

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