Communications: directive radio wave systems and devices (e.g. – Determining distance – With pulse modulation
Reexamination Certificate
2006-04-18
2006-04-18
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
With pulse modulation
C342S070000, C342S118000, C342S134000, C342S175000, C342S195000, C701S300000, C701S301000
Reexamination Certificate
active
07030807
ABSTRACT:
The invention relates to a radar device for measuring a relative distance to a target. It is an object of the invention to precisely determine the relative distance to the target in a wide range. The radar device according to the invention generates a second pulse by demodulating a signal arriving from a target as a response to a wave signal modulated with a first pulse. The radar device evaluates, as the relative distance to the target, such two different instances that an absolute value of a deviation of a ratio of two instantaneous values of the second pulse from a reference value as a ratio of two instantaneous values of the first pulse is to be minimum. The respective two instantaneous values are with a predetermined interval therebetween on a time axis.
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International Search Report dated May 27, 2003.
Oishi Yasuyuki
Yokoo Kaoru
Fujitsu Limited
Gregory Bernarr E.
Katten Muchin & Rosenman LLP
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