Method and apparatus for measuring a vehicle's own speed by the

Details Method and apparatus for measuring a vehicle's own speed by the Method and apparatus for measuring a vehicle's own speed by the

1990-03-02

1990-12-25

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Determining velocity

Digital

342117, G01S 1360

Patent

active

049806335

ABSTRACT:
A method for measuring a vehicle's own speed by the Doppler radar principle, in accordance with which microwaves of a transmission frequency are sent out by the vehicle, a part thereof being reflected back and mixed with the microwave signal at transmission frequency. In this way Doppler signals are produced which, after pulse formation, are evaluated as Doppler pulse signals by a frequency measurement in the time range plus direction-of-travel evaluation, so as to form digital Doppler signal values. For the determination of a mean Doppler period in each case, a median M(n-3) is continuously determined from a predetermined number of the last generated digital Doppler signal values of the sequence M(n-1), M(n-2), M(n-3), M(n-4), M(n-5).

REFERENCES:
patent: 4635059 (1987-01-01), Ball
patent: 4728954 (1988-03-01), Phelan et al.
patent: 4818999 (1989-04-01), Kobayashi et al.

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