Processing of Second Order Statistics via Wavelet Transforms
Hippenstiel, Ralph Dieter
Fargues, Monique P.
Khalil, Nabil H.
Overdyk, Howard F.
MetadataShow full item record
Research was conducted to evaluate the feasibility of wavelet transforming second order statistics. To identify the modulation type and to extract signal modulation parameters of frequency hopped signals wavelet functions are applied to the two-dimensional instantaneous correlation function. Parameters of interest are switching times and hop frequencies. The characteristics of the wavelet transform of the correlation function is derived. The wavelet transform is applied along the delay and the time axes. Processing along the delay axis allows the identification of frequency hopped signals and estimation of frequencies and switching times. Processing along the time axis allows detection of the transition times of frequency and time hopped signals.
The views expressed in this report are those of the author and do not reflect the offical policy or position of the Department of Defense or the United States Government.
NPS Report NumberNPS-EC-98-005
Showing items related by title, author, creator and subject.
Khalil, Nabil Hamdy Shaker (Monterey, California. Naval Postgraduate School, 1997-09);Frequency hopped signals are widely used in various communication applications for their inherent security features. The demand, by civilian and governmental agencies, to intercept communication signals is increasing. The ...
Jerauld, Joseph G. (Monterey, California. Naval Postgraduate School, 1998-03-01);Flaws in structural elements release strain energy in the form of stress waves that can be detected through acoustical emission techniques. The transient nature of a stress wave is analytically inconsistent to Fourier ...
Multiple-input multiple-output wavelet packet modulation based software-defined radio transceiver design Cribbs, Michael R. (Monterey, California: Naval Postgraduate School, 2015-09);In this thesis, a software-defined radio (SDR) transmitter and receiver is developed using GNU Radio. The designed SDR multiplexes orthogonal subcarriers using wavelet packet modulation (WPM). WPM achieves subcarrier ...