Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Patent
1997-05-06
1999-08-31
Lobo, Ian J.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
342112, 342129, G01S 13536, G01S 1393
Patent
active
059459395
ABSTRACT:
A multibeam FM radar system has an FM radar module for transmitting beams of FM signals whose frequencies linearly vary in rising and falling periods, in respective different directions with adjacent ones of the beams overlapping each other, receiving echo signals from a given beam, and mixing the FM signals and the echo signals into beat signals corresponding to said given beam. The multibeam FM radar system also has a main radar circuit including a central processing unit for identifying pairs of beat frequencies in the beat signals corresponding to said given beam, and processing the pairs of the frequencies to calculate distances up to and/or relative speeds with respect to objects within said given beam which have produced the echo signals, while comparing the frequencies within said identified pairs of beat frequencies to beat frequencies within a beam adjacent to said given beam to produce a detected result corresponding to an object producing echo signals within said given beam.
REFERENCES:
patent: 5181037 (1993-01-01), Komatsu
patent: 5268692 (1993-12-01), Grosch et al.
patent: 5448244 (1995-09-01), Komatsu et al.
patent: 5652589 (1997-07-01), Ono et al.
Honda Giken Kogyo Kabushiki Kaisha
Lobo Ian J.
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