Radar

Details Radar Radar

2006-04-25

2006-04-25

Gregory, Bernarr E. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Determining distance

With frequency modulation

C342S070000, C342S104000, C342S109000, C342S118000, C342S175000, C342S192000, C342S195000, C342S196000

Reexamination Certificate

active

07034743

ABSTRACT:
An FM-CW radar detects at least one of the relative distance and the relative speed of a predetermined object based on the frequencies of projection portions observed in the frequency spectrums of beat signals in an ascending-modulation section and a descending-modulation section, where the projection portions are generated by one and the same object. The radar determines the moving speed of a predetermined moving object such as a vehicle or the like having the radar mounted thereon, and the frequency difference between the projection portions observed in the frequency spectrums of the beat signals in the ascending-modulation section and the descending-modulation section is inversely calculated, where the frequency difference corresponds to the stationary object, and a predetermined pair corresponding to the frequency difference is extracted on a priority basis.

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Official Communication dated Oct. 25, 2005, issued in the corresponding Japanese Patent Application No. 2002-163349.

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