Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article An Estimation-Range Extended Autocorrelation-Based Frequency Estimator | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID 961938 7 pages doi 2009 961938 Research Article An Estimation-Range Extended Autocorrelation-Based Frequency Estimator Cui Yang Gang Wei and Fang-jiong Chen School of Electronic and Information Engineering South China University of Technology 381 Wushan Road Guangzhou 510640 China Correspondence should be addressed to Cui Yang yangcui26@ Received 24 June 2009 Revised 26 August 2009 Accepted 19 October 2009 Recommended by Erchin Serpedin We address the problem of autocorrelation-based single-tone frequency estimation. It has been shown that the frequency can be estimated from the phase of the available signal s autocorrelation with fixed lag. A large lag results in better performance but at the same time limits the estimation range. New methods have been proposed to extend the estimation range. In this paper a new estimator which is a robust hybrid of periodogram-based and autocorrelation-based frequency estimators is presented. We propose to calculate the autocorrelation function with spectral lines inside the available signal s main lobe spectrum. We show that the new estimator obtains full estimation range of -n n . The theoretical performance bound is also deduced. Performance analysis and simulations demonstrate that the proposed estimator approaches the CRLB. Copyright 2009 Cui Yang et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction The problem of estimating the frequency of a complex exponential from a finite number of samples in additive white noise arises in many fields including radar sonar measurement wireless communications and speech processing 1-16 . For instance frequency estimation of singletone sinusoidal signals is an important technique for carrier .
