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Efficient and Accurate Frequency Estimator under Low SNR by Phase Unwrapping
- Source :
- Mathematical Problems in Engineering, Vol 2019 (2019)
- Publication Year :
- 2019
- Publisher :
- Hindawi Limited, 2019.
-
Abstract
- In the case of low signal-to-noise ratio, for the frequency estimation of single-frequency sinusoidal signals with additive white Gaussian noise, the phase unwrapping estimator usually performs poorly. In this paper, an efficient and accurate method is proposed to address this problem. Different from other methods, based on fast Fourier transform, the sampled signals are estimated with the variances approaching the Cramer-Rao bound, followed with the maximum likelihood estimation of the frequency. Experimental results reveal that our estimator has a better performance than other phase unwrapping estimators. Compared with the state-of-the-art method, our estimator has the same accuracy and lower computational complexity. Besides, our estimator does not have the estimation bias.
- Subjects :
- 0209 industrial biotechnology
Computational complexity theory
Article Subject
General Mathematics
Maximum likelihood
lcsh:Mathematics
Fast Fourier transform
General Engineering
Estimator
020206 networking & telecommunications
02 engineering and technology
lcsh:QA1-939
Phase unwrapping
symbols.namesake
020901 industrial engineering & automation
Additive white Gaussian noise
lcsh:TA1-2040
0202 electrical engineering, electronic engineering, information engineering
symbols
lcsh:Engineering (General). Civil engineering (General)
Algorithm
Mathematics
Subjects
Details
- Language :
- English
- ISSN :
- 15635147
- Volume :
- 2019
- Database :
- OpenAIRE
- Journal :
- Mathematical Problems in Engineering
- Accession number :
- edsair.doi.dedup.....9f5767bdc2d6a317e774dd36f3042fe1