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Approximated Maximum Likelihood Estimation of Carrier Frequency Offset in Practical OFDM Systems

Ruan, Matt (Ming); Reed, Mark; Shi, Zhenning


This paper proposes a high-performance and relatively low-complexity approximated maximum likelihood estimator (MLE) for carrier frequency offset (CFO) in practical orthogonal frequency multiplexing (OFDM) systems, where the preamble has repetition structure in time domain, null subcarriers are allocated at two ends of the frequency spectrum, and the channel impulse response is assumably not longer than the cyclic prefix. We show the optimality of conventional MLEs do not hold in such systems,...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Conference paper
Source: 2007 IEEE Wireless Communications & Networking Conference
DOI: 10.1109/WCNC.2007.265


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