NDLI: Joint estimation of carrier frequency offset and statistical parameters of the multipath fading channel

Content Provider	IEEE Xplore Digital Library
Author	Nissila, M. Pasupathy, S.
Copyright Year	1972
Abstract	In this paper, we focus on the joint estimation of the carrier frequency offset and statistical parameters of the multipath mobile channel. By modeling the multipath fading channel with a complex bandpass autoregressive (AR) model, we show how the estimates for the frequency offset, Doppler spread, and power profile of the multipath channel can be extracted from the estimated complex AR coefficients obtained via the expectation-maximization algorithm. A main advantage of the proposed joint estimator is that while it has a capability of performing equally well in all scattering environments, it can provide accurate estimates even in high-mobility channel conditions. We also demonstrate how the complexity of the estimator can be significantly reduced, while only slightly trading off performance, by applying the mean field approximation technique. Moreover, we derive a fully adaptive joint synchronization and channel-estimation scheme, as well as a novel Kalman-smoother-based frequency-error detector that can be used in feedback frequency-recovery schemes and is particularly well suited for fast-fading channel conditions. Finally, we revisit the Cramer-Rao lower bound analysis, and show how the Fisher information matrix can be conveniently computed in the presence of a frequency-selective Rayleigh fading channel
Starting Page	1038
Ending Page	1048
Page Count	11
File Size	510856
File Format	PDF
ISSN	00906778
Volume Number	54
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency estimation Fading Transmitters Frequency synchronization Statistics Multipath channels Expectation-maximization algorithms Rayleigh scattering Detectors Feedback mean field approximation (MFA) Doppler spread expectation-maximization (EM) algorithm frequency offset Kalman smoother
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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