NDLI: Suboptimal Maximum Likelihood Frequency Offset Estimation in Flat Fading Channels

Content Provider	IEEE Xplore Digital Library
Author	Karthik, M. Li, K.H. Oh, S.W.
Copyright Year	2005
Description	Author affiliation: R&D Centre, STMicroelectron. (Karthik, M.)
Abstract	Pilot symbol assisted modulation (PSAM) is a practical technique to maintain high performance in mobile communications. Based on received pilot symbols, frequency offset can be estimated and compensated accordingly. One important class of estimators is based on the maximum likelihood (ML) criterion. The ML-based estimator has high computational complexity, which is typically of the order of $O(N^{2}).$ Hence, suboptimal ML-based estimators with lesser complexity are sought. In this paper, we propose two suboptimal ML-based frequency offset estimators with reduced complexity operating over flat-fading channels. The performance results of the suboptimal estimators differ from that of the ML estimator by one order of magnitude, but the computational complexity is significantly reduced for long observation lengths. The estimators are based on fast Fourier transform (FFT) and can easily be implemented on DSP architectures
Starting Page	1383
Ending Page	1387
File Size	2606115
Page Count	5
File Format	PDF
ISBN	0780392833
DOI	10.1109/ICICS.2005.1689284
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-12-06
Publisher Place	Thailand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency estimation Maximum likelihood estimation Fading AWGN Cost function Computational complexity Digital signal processing Additive white noise Least squares approximation Research and development maximum likelihood and flat fading Frequency offset suboptimal
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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