Non-parametric adaptive power law detector
US6356600B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1998 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Apr 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/527
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for detecting unknown broadband signals in noise consisting of non-stationary narrowband components and a stationary colored broadband component includes a sensor which collects data in which a signal of interest may be found and generates a received data stream. A preprocessor operates on the received data stream to generate training and detection vectors corresponding to noise only and noise plus signal intervals of the received data stream, respectively. A spectrum processor receives the training and detection vectors and generates cleaned broadband spectrum estimates {tilde over (C)}1(ƒ) and {tilde over (C)}2(ƒ) from the training and detection vectors, respectively, by adaptively separating non-stationary tonal components from the stationary broadband component using modified multiple taper spectral estimation combined with maximum likelihood tonal removal. The cleaned broadband spectrum estimates {tilde over (C)}1(ƒ) and {tilde over (C)}2(ƒ) are passed to a detection processor which detects unknown broadband signals within the received data stream using a power law detection process which operates on normalized (whitened) broadband signals {tilde o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.