Communications: directive radio wave systems and devices (e.g. – Determining distance – With frequency modulation
Reexamination Certificate
2008-05-08
2010-11-30
Tarcza, Thomas H (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
With frequency modulation
C342S105000, C342S118000, C342S070000
Reexamination Certificate
active
07843381
ABSTRACT:
A radar device of FM pulse system, in which a pulsed radio wave with frequency modulated is transmitted or received, to calculate a distance to a target203and a relative velocity, comprising: range gate setting means205for determining a sampling timing every time a predetermined time period has passed from a transmission timing; sampling means206for making a sampling in a frequency up zone or frequency down zone in each range gate; and measurement time changing means207for setting a measurement data used as an input of Fourier transform based on sampling data obtained by the sampling means206, and when letting a time period required to make a sampling of all measurement data a measurement time period, changing the measurement time period in each range gate. An optimum distance resolution and relative velocity resolution can be set based on the distance to a target.
REFERENCES:
patent: 2002/0190894 (2002-12-01), Mitsumoto et al.
patent: 5-19045 (1993-01-01), None
patent: 8-211145 (1996-08-01), None
patent: 9-133765 (1997-05-01), None
Brainard Timothy A
Mitsubishi Electric Corporation
Sughrue & Mion, PLLC
Tarcza Thomas H
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