| 摘要 |
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.
|
