System for detecting mobile receivers, using digital telebroadcasts transmissions of a ground transmitter network,申请号US20020070426-传众专利搜索

System for detecting mobile receivers, using digital telebroadcasts transmissions of a ground transmitter network

申请公布号：US6677900(B1)

申请号：US20020070426

申请日期：2002.06.18

申请公布日期：2004.01.13

申请人：

THALES;OFFICE NATIONAL D'ETUDES DE RECHERCHES AEROSPATIALES

发明人：THOUVENEL GERARD;LESTURGIE MARC;POULLIN DOMINIQUE

分类号：G01S13/46;G01S3/02;G01S7/292;G01S7/32;G01S13/00;G01S13/42;G01S13/58;G01S13/87;H04L27/26;(IPC1-7):G01S3/02

主分类号：G01S13/46

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.