NDLI: The Effects of Fuzzy Logic on Carrier Frequency Offset Tracking Performance of Single and Multi Carrier Communication Systems

Content Provider	IEEE Xplore Digital Library
Author	Ozen, A. Soysal, B. Kaya, I.
Copyright Year	2006
Description	Author affiliation: Elektrik-Elektron. Muhendisligi Bolumu, Karadeniz Tech. Univ., Trabzon (Ozen, A.)
Abstract	In this paper, carrier frequency offset (CFO) tracking performances of channel equalizers for single (SC) and multi carrier (MC) systems used in frequency selective Rayleigh fading channels are investigated. The performances of both systems for different values of CFO are compared. Since the desired performance cannot be achieved by CFO tracking ability of conventional LMS for SC and MC systems used in time varying channels, a fuzzy logic based LMS (F-LMS) algorithm is proposed. CFO tracking performance with the proposed F-LMS algorithm becomes very close to the performance of RLS algorithm with a small and negligible increment in computational complexity. Computer simulations using conventional LMS, normalized LMS, modified LMS, variable step size LMS-DFE, B-LMS-DFE and conventional RLS-DFE algorithms are performed in SC systems. The same algorithms are also used in MC (OFDM) systems in which the channel is estimated in time domain then used in frequency domain channel equalizer. For performance comparisons, the HIPERLAN/1 (SC) and HIPERLAN/2 (OFDM) standards are used as the working platforms during simulations. The obtained and compared results are given in Section 3
Starting Page	1
Ending Page	4
File Size	1476043
Page Count	4
File Format	PDF
ISBN	1424402387
DOI	10.1109/SIU.2006.1659686
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-04-17
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fuzzy logic Fading Equalizers Time varying systems OFDM Computer simulation Resonance light scattering Frequency Least squares approximation Computational complexity
Content Type	Text
Resource Type	Article

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