Using edge information in time–frequency representations for chirp parameter estimation
نویسندگان
چکیده
منابع مشابه
Using edge information in time–frequency representations for chirp parameter estimation
Time–frequency representations of a signal can provide a useful means for obtaining parameter estimates for signals consisting of various chirps. We demonstrate the utility of including edge information extracted from these time–frequency representations when using a Hough transformation to perform this task. In particular, we show that using the edge information: (1) reduces the variance of th...
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We consider the problem of estimating the parameters of a chirp signal observed in multiplicative noise, i.e., whose amplitude is randomly time-varying. Two methods for solving this problem are presented. First, an unstructured nonlinear least-squares approach (NLS) is proposed. It is shown that by minimizing the NLS criterion with respect to all samples of the time-varying amplitude, the probl...
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ژورنال
عنوان ژورنال: Applied and Computational Harmonic Analysis
سال: 2005
ISSN: 1063-5203
DOI: 10.1016/j.acha.2004.11.002