Communications: directive radio wave systems and devices (e.g. – Determining velocity – Combined with determining distance
Patent
1986-03-06
1987-11-10
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
Determining velocity
Combined with determining distance
342115, 342120, 342196, G01S 1358
Patent
active
047060921
ABSTRACT:
This arrangement comprises a fixed frequency emitter circuit (10) for directing a wave (12) to a surface (2) by means of a transmission antenna (11), a receiver circuit (25) for receiving by means of at least one receiving antenna (23) the wave (12) returned by the surface, and a processing circuit (30) for processing the return wave and enabling production of an indication of the velocity. The processing circuit has two branches (50 and 54), a direct branch for applying the received signal to one input of a multiplying member (52), and a delaying branch for applying the received signal to the other input of the multiplying member after having produced a delay t.sub.0 relative to the direct branch. A frequency estimating element (60) receives the multiplying member output signal and a calculation member (62) produces the indication of the velocity from the estimating member output signal and of the distance "h".
REFERENCES:
patent: 3588899 (1971-06-01), Strauch
patent: 4302758 (1981-11-01), Tomasi
patent: 4426647 (1984-01-01), Tomasi
Gregory Bernarr Earl
Kraus Robert J.
Tubbesing T. H.
U.S. Philips Corporation
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