G - Physics – 01 – S
Patent
G - Physics
01
S
343/50
G01S 13/60 (2006.01) G01S 13/524 (2006.01)
Patent
CA 1204197
INVENTOR: ALFRED GRAU INVENTION: ARRANGEMENT FOR COMPENSATION OF UNWANTED ECHOES CAUSED BY THE MOVEMENT OF A RADAR DEVICE ABSTRACT OF THE DISCLOSURE In order to compensate the unwanted echo caused by the movement of a moving radar device, an arrangement is provided between the output of a coherent oscillator and the input of a phase discriminator. This arrangement comprises a signal processing stage containing two series-connected phase regulating circuits, namely phase-locked loops. The output signal of the first phase-locked loop displays a mixed frequency which is formed by the sum of the frequency of the output signal of a signal generator and a displacement frequency modulated by the Doppler frequency of the unwanted echo caused by the movement of the radar device. In the second phase-locked loop, the output signal of the first phase-locked loop is mixed with a further signal containing the displacement frequency.
414746
Johnson & Hicks
Siemens-Albis Aktiengesellschaft
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