The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A modern method for discrete underwater channel characterization is the passive tomography concept which takes advantage of the generated signals by the natural sources (opportunity sources). The main difficulty which appears in this field is due to the lack of any information about the received signals. In this paper, we present a method for underwater channel characterization, supposing that the...
In this letter a novel method of scalar miss distance measurement is proposed, which can keep high estimation precision even in the noisy background with very low signal-to-noise. What's more, the good performance is not accompanied with heavy computation load. Simulation results demonstrate the effectiveness and feasibility of the proposed method.
We propose a new approach based upon the adaptive chirplet decomposition to characterize the time-dependent behavior of machine vibration signals. This approach employs maximum projective decomposition algorithm combined fractional Fourier transform with quasi-Newton method to estimate the parameters. Then, the expectation maximization algorithm is used to refine the results. Compared with traditional...
Space-borne synthetic aperture radar is widely used in the military field. To counter space-borne SAR, it is necessary to estimate the parameters of space-borne SAR in real-time. After Receiving the signals of SAR, fractional Fourier transform is applied to both single pulse and pulse train, which can estimate the parameters in real-time. Theory analysis and Numerical simulation show this method has...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.