Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Patent
1998-01-08
1999-07-27
Lobo, Ian J.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
342109, 340903, 180169, G01S 1392, G01S 1393
Patent
active
059298030
ABSTRACT:
Vehicular radar apparatus which enhances the accuracy of detection of a preceding vehicle and the reliability in tracking, by performing operations that use a normal distribution. For the purpose of obtaining a distance between one's own vehicle, on which the radar apparatus is mounted, and a target object, and obtaining a relative velocity from input data based on transmission and reception electromagnetic waves, this radar apparatus provided with a signal processing unit which has operation devices for performing an operation by applying normal distributions to frequencies of detection of the distance and the relative velocity and a target object recognition device for recognizing a target object on the basis of results of an operation to which the normal distributions are applied. The operation device is operative to establish a window corresponding to each target object, and obtain the frequencies of detection of the distance and the relative velocity correspondingly to each of plural data widths or sections of a probability density on a normal distribution curve, and establish a next window from data representing detected frequencies. The target object recognition device is operative to recognize target objects, each of which corresponds to a distance and a relative velocity that are within a same window, as different objects, but recognize target objects, each of which corresponds to a distance and a relative velocity that are not within a same window, as different objects as an identical object.
REFERENCES:
patent: 5572428 (1996-11-01), Ishida et al.
patent: 5613039 (1997-03-01), Wang et al.
Uehara Naohisa
Watanabe Masahiro
Lobo Ian J.
Mitsubishi Denki & Kabushiki Kaisha
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