Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Transmitter
Patent
1990-04-02
1992-02-11
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Transmitter
342130, 342 70, 340435, G01S 1338
Patent
active
050879189
ABSTRACT:
A vehicle near obstacle detection system includes a plurality of radio frequency heads that can transmit and receive both frequency-modulated, continuous wave and two-frequency Doppler radar signals, such that the system operates in frequency-modulated, continuous wave radar mode and in two-frequency Doppler radar mode. The radio frequency heads used for transmitting the radar signals transmit their radar signals in accordance with commands from a system controller. The radio frequency heads are provided at various locations on the vehicle, directed at points around the vehicle which cannot easily be seen by the vehicle operator. The system controller switches between the two radar modes depending on which one is more appropriate to make use of one mode's strengths while avoiding the other mode's weaknesses. When there is no relative movement between objects and the vehicle, the frequency-modulated, continuous wave mode is used. When there is relative movement and the accuracy warrants it, the two-frequency Doppler mode is used.
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Kebede Kassahun
May Phillip A.
Ward John L.
Conkey Howard N.
Delco Electronics Corporation
Sotomayor John B.
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