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ICC
2007
IEEE

Composite Frequency-Offset Estimator for Wireless Communications

14 years 5 months ago
Composite Frequency-Offset Estimator for Wireless Communications
— The paper deals with the problem of the carrier frequency-offset (CFO) estimation for wireless communications. Since the well-known maximum-likelihood (ML) CFO estimator is rather complex, many complexity-reduced CFO estimators have so far been proposed. However, most of them are based on periodic training sequences and have limited estimation range. We propose a general framework called composite frequencyoffset estimator (CFE), which can extend the estimation range of any range-limited correlation-based CFO estimator up to the full transmission spectrum. We first formulate the CFO estimation as a problem of composite hypothesis testing, and then solve the problem by the composite hypothesis testing approaches. We show that the composite frequency-offset estimate is the ML estimate as long as the original range-limited estimator is unbiased and attains the Cram´er-Rao Lower Bound. The CFE also allows a flexible tradeoff between the estimation range and computational complexity....
Zhuo Lu, Jiandong Li, Linjing Zhao, Yao Liu
Added 02 Jun 2010
Updated 02 Jun 2010
Type Conference
Year 2007
Where ICC
Authors Zhuo Lu, Jiandong Li, Linjing Zhao, Yao Liu
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