Clutter rejection in a passive radar receiver of OFDM signals
US6924763B2 · kind B2 · utility
25Cited by
8References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2002 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Jan 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/524
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns a passive radar receiver for a received orthogonal frequency division multiplex-type signal consisting of symbol frames each emitted on coded orthogonal carriers. After formatting the received signals into digital symbols (S1 S1), a filtering circuit (2) eliminates by subtraction or using a covariance matrix, in the symbol signal at least unwanted signals with null Doppler effect so as to apply a filtered signal (X′) including essentially signals backscattered by mobile targets to a Doppler-distance correlator (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.