Communications: directive radio wave systems and devices (e.g. – Determining distance – Altimeter
Patent
1990-12-14
1991-12-10
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Determining distance
Altimeter
342128, 342 85, 342174, G01S 1334, G01S 740
Patent
active
050722239
ABSTRACT:
This radar system for measuring the nearest distance "h" comprises transmitting means (9, 7, 5) for transmitting towards an object a frequency-modulated wave, receiving means (15, 17) for receiving the wave after reflection by the object, mixing means (20) for producing a beat-frequency wave between the transmitted wave and the received wave, high-speed digital processing means (30) for effecting a time-frequency transformation operation of the beat-frequency wave; it further comprises management means (50) for providing the user with the value "h" by influencing more specifically the transmitting means and the high-speed digital processing means.
REFERENCES:
patent: 2686302 (1954-08-01), Capelli
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patent: 4166289 (1979-08-01), Murtha et al.
patent: 4268828 (1981-05-01), Cribbs et al.
patent: 4367473 (1983-01-01), Marin et al.
patent: 4566010 (1986-01-01), Collins
patent: 4568938 (1986-02-01), Ubriaco
patent: 4766436 (1988-08-01), Crepin et al.
Purdy, "Signal Processing Linear Frequency Modulated Signals", Radar Technology, edited Eli Brookner, Artech House, 1977, pp. 155-162.
Crepin Hugues
Hethuin Serge
Barron Jr. Gilberto
Kraus Robert J.
U.S.Philips Corporation
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