Nonstationary and stationary noise

Lorenzo Galleani; Leon Cohen

doi:10.1117/12.668448

18 May 2006 Nonstationary and stationary noise

Lorenzo Galleani, Leon Cohen

Proceedings Volume 6234, Automatic Target Recognition XVI; 623416 (2006) https://doi.org/10.1117/12.668448
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

Many man made and natural noises in nature are nonstationary, however most methods that have been devised to study noises, theoretically or experimentally, have been devised for the stationary situations. We have developed a number of methods to study noises that are nonstationary. We use the Wigner spectrum and other time-frequency representations to represent time-varying noises. These representations can be thought of as a generalization of the standard power spectrum. In this paper we study simple models of nonstationary noises and obtain the Wigner spectrum numerically from realizations of the noises and also by direct calculation. We show that for our test cases the Wigner spectrum clearly shows the nonstationarities of the noise. We also present a method to generate nonstationary white noise that has very different behavior than the standard white Gaussian noise.

Citation Download Citation

Lorenzo Galleani and Leon Cohen "Nonstationary and stationary noise", Proc. SPIE 6234, Automatic Target Recognition XVI, 623416 (18 May 2006); https://doi.org/10.1117/12.668448

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available