Bootstrap based signal denoising
Kan, Hasan Ertam
Fargues, Monique P.
Hippenstiel, Ralph D.
MetadataShow full item record
"This work accomplishes signal denoising using the Bootstrap method when the additive noise is Gaussian. The noisy signal is separated into frequency bands using the Fourier or Wavelet transform. Each frequency band is tested for Gaussianity by evaluating the kurtosis. The Bootstrap method is used to increase the reliability of the kurtosis estimate. Noise effects are minimized using a hard or soft thresholding scheme on the frequency bands that were estimated to be Gaussian. The recovered signal is obtained by applying the appropriate inverse transform to the modified frequency bands. The denoising scheme is tested using three test signals. Results show that FFT-based denoising schemes perform better than WT-based denoising schemes on the stationary sinusoidal signals, whereas WT-based schemes outperform FFT-based schemes on chirp type signals. Results also show that hard thresholding never outperforms soft thresholding, at best its performance is similar to soft thresholding."--p.i.
Approved for public release, distribution is unlimited
Showing items related by title, author, creator and subject.
Hughes, John B. (Monterey, California. Naval Postgraduate School, 2003-03);This thesis investigates and compares time and wavelet-domain denoising techniques where received signals contain broadband noise. We consider how time and wavelet-domain denoising schemes and their combinations compare ...
Stevens, John Davenport. (Monterey, California. Naval Postgraduate School, 2000-03-01);Detecting short transients is a signal processing application that has a wide range of military uses. To be specific in Undersea Warfare, sensitive signal detection schemes can increase the effective range of active and ...
Localization of wireless communication emitters using Time Difference of Arrival (TDOA) methods in noisy channels Mantis, Spiros D. (Monterey, California. Naval Postgraduate School, 2001-06);The ability to provide position information of wireless emitters comprises a very important communication tool and has extremely valuable applications to military as well as civilian life. GSM is the most popular method ...