Radar/sonar system concept for extended range-doppler coverage

Details Radar/sonar system concept for extended range-doppler coverage Radar/sonar system concept for extended range-doppler coverage

G - Physics

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G01S 13/522 (2006.01) G01S 13/58 (2006.01) G01S 15/50 (2006.01) G01S 13/20 (2006.01) G01S 13/22 (2006.01) G01S 13/24 (2006.01) G01S 13/90 (2006.01) G01S 15/58 (2006.01) G01S 15/89 (2006.01)

Patent

CA 2253235

A method and apparatus for preventing the occurence of range ambiguities and Doppler ambiguities in both a radar and sonar environment. A series of N pulses are produced, each of which contains a number of contagious subpulses. Each of the subpulses exhibits a different frequency than the remaining subpulses in that particular pulse. Furthermore, the order of appearance of the subpulses in each of the pulses is unique with respect to the remaining pulses in the series. A matched filter receiver (10) and Doppler processor (30) are used to provide auto correlations and cross correlations (R1-RN) to prevent the range ambiguities and Doppler ambiguities.

Procédé et dispositif permettant d'empêcher la survenue d'ambiguïtés distance et d'ambiguïtés Doppler dans un environnement aussi bien radar que sonar. Une série de N impulsions est produite, dont chacune contient un certain nombre de sous-impulsions contagieuses. Chaque sous-impulsion a une fréquence différente des autres sous-impulsions au sein de cette impulsion particulière. De plus, l'ordre d'apparition des sous-impulsions dans chaque impulsion est unique par rapport aux autres impulsions de la série. Un récepteur à filtre (10) et une unité de traitement Doppler (30) adaptés sont utilisés pour fournir des autocorrélations et des corrélations croisées (R1-RN), ce qui permet d'éviter les ambiguïtés distance et les ambiguïtés Doppler.

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