Title :
Optimal correlation based frequency estimator with maximal estimation range
Author :
Peng, Kewu ; Xu, Aolin ; Yang, Zhixing
Author_Institution :
Nat. Lab. for Inf. Sci. & Technol., Tsinghua Univ., Beijing
Abstract :
The estimation range and estimation accuracy are contradictory in conventional correlation based frequency estimators due to phase ambiguity. A novel frequency estimator is proposed to unwrap the correlation phase sequence through a differential-modulus-accumulation process. By utilizing the whole unwrapped phase sequence, the proposed estimator is able to achieve maximal estimation range with CRB approaching estimation accuracy and low SNR threshold simultaneously. Both analysis and simulation demonstrate the effectiveness of the proposed frequency estimator.
Keywords :
correlation methods; frequency estimation; conventional correlation; correlation phase sequence; differential modulus accumulation; estimation accuracy; frequency estimator; maximal estimation range; optimal correlation; phase ambiguity; unwrapped phase sequence; Analytical models; Autocorrelation; Frequency estimation; Frequency synchronization; Information science; Laboratories; Maximum likelihood estimation; Oscillators; Phase estimation; Yield estimation;
Conference_Titel :
Communications, Circuits and Systems, 2008. ICCCAS 2008. International Conference on
Conference_Location :
Fujian
Print_ISBN :
978-1-4244-2063-6
Electronic_ISBN :
978-1-4244-2064-3
DOI :
10.1109/ICCCAS.2008.4657772
