A method for estimating the position and the speed of a...

G - Physics – 01 – S

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G01S 13/24 (2006.01) G01S 13/28 (2006.01) G01S 13/58 (2006.01) H04L 27/26 (2006.01) G06F 17/10 (2006.01)

Patent

CA 2725524

There is disclosed a method for estimating the position and the speed of a target with a radar. The radar emits a waveform comprising a train of pulses, each pulse comprising an OFDM chip constructed from subcarriers, the subcarriers covering the whole bandwidth of the radar. Upon receipt of the echoed pulses, some of the subcarriers are used in a step of Doppler processing, each of said subcarriers being fixed over the pulses. Upon receipt of the echoed pulses, other subcarriers, that are not used for Doppler processing, are used in a step of High Range Resolution processing, the said subcarriers being randomly distributed over the pulses.

La présente invention concerne un procédé permettant destimer la position et la vitesse dune cible avec un radar. Le radar émet une forme donde comportant un train dimpulsions, chaque impulsion comprenant une bribe OFDM construite à partir de sous-porteuses, les sous-porteuses recouvrant lensemble de la bande passante du radar. Lors de la réception des impulsions réfléchies, certaines des sous-porteuses sont utilisées dans une étape de traitement Doppler, chacune desdites sous-porteuses étant fixée sur les impulsions. Lors de la réception des impulsions réfléchies, dautres sous-porteuses, qui ne sont pas utilisées pour le traitement Doppler, sont utilisées dans une étape de traitement de résolution de portée élevée, lesdites sous-porteuses étant réparties de manière aléatoire sur les impulsions.

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