System for detecting mobile receivers, using digital telebroadcasts transmissions of a ground transmitter network
US6677900B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 18, 2002 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Jun 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for detecting mobile bodies, using digital telebroadcasting transmissions of an array of terrestrial transmitters. The digital telebroadcast transmissions include a plurality of carriers, afforded symbol-based digital modulation, processed by carrier-wise orthogonal frequency multiplexing. After its reception stages, the receiver includes a processor for performing a discrimination of backscattering the transmissions, according to distance/Doppler bins. A reference pathway receives and demodulates the direct signal received from one of the transmitters. The processor includes a Doppler distribution, the Doppler pathways of which are each assigned to a respective frequency shift, then a distance compressor that yields samples arranged in the distance/Doppler bins. After coherent Doppler integration, a postprocessing with tracking contrasts the echoes obtained in these bins, to obtain radar plots containing position/velocity information on one or more objects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.