Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Reexamination Certificate
2007-01-22
2008-10-07
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
C342S109000, C342S128000, C342S192000, C342S196000
Reexamination Certificate
active
07432849
ABSTRACT:
A frequency modulation radar apparatus for vehicle use can suppress the influence of noise to avoid incorrect estimation due to noise thereby to provide a beat frequency with high accuracy and at high speed without increasing the frequency resolution of the beat frequency that causes an increase in an observation time. The apparatus includes a frequency correction section that calculates a corrected frequency (fn+δ) by adding an amount of frequency correction (δ) to the frequency (fn) of a peak signal, and a CPU that calculates a distance or a relative speed to a target object based on the corrected frequency (fn+δ). In an FFT calculation section, the frequency (ft) of the true peak signal is calculated based on the characteristic of a window function, and if the frequency (ft) thus calculated is determined as an incorrect estimation, the frequency of the true peak signal is further corrected.
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Bythrow Peter M
Mitsubishi Electric Corporation
Sughrue & Mion, PLLC
Tarcza Thomas H.
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