Parametric Method Based PSD Estimation using Gaussian Window

Parametric Method Based PSD Estimation using Gaussian Window

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2015 by IJETT Journal
Volume-29 Number-1
Year of Publication : 2015
Authors : Pragati Sheel, Dr. Rajesh Mehra, Preeti Singh
DOI :  10.14445/22315381/IJETT-V29P204

Citation 

Pragati Sheel, Dr. Rajesh Mehra, Preeti Singh "Parametric Method Based PSD Estimation using Gaussian Window", International Journal of Engineering Trends and Technology (IJETT), V29(1),18-22 November 2015. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract
Non-parametric methods of Spectrum Estimation Such as Periodogram, Modified Periodogram, Welch, Bartlett and Blackman-Tukey are generally used but are not always efficient in finding out the power spectral densities. These methods lacks due to their limitations like windowing of the autocorrelation sequence, spectral leakage, poor resolution and incapability to include the available information about the process into the estimation procedure. In these cases parametric approach of spectrum estimation outperforms the nonparametric ones and helps in producing high resolution spectral estimates. Also, parametric methods are more accurate and computationally more efficient than the non-parametric methods. As Gaussian window is an important window in digital signal processing applications. So in the proposed work, Burg’s, Yule-Walker, Covariance and Modified Covariance methods are used to estimate the PSD of the Gaussian window function. The simulation is done in MATLAB and compared to analyze the power in different spectral components using different methods.

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Keywords
Parametric Methods, PSD, Burg’s method, Yule Walker method, Covariance method, Modified Covariance method.