Communications: directive radio wave systems and devices (e.g. – With particular circuit – Digital processing
Reexamination Certificate
2005-08-09
2005-08-09
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Digital processing
C342S070000, C342S118000, C342S128000, C342S159000, C342S160000, C342S175000, C342S195000, C701S300000, C701S301000
Reexamination Certificate
active
06927726
ABSTRACT:
A radar suppresses a dc component so as to improve the precision in processing a signal that belongs to a low-frequency band. The radar comprises a mixer that mixes a transmitted signal and a received signal, and an A/D converter that analog-to-digital converts an output signal of the mixer. The radar further includes: a removing unit that removes a dc voltage component by subtracting a predetermined removal voltage value from output data of the A/D converter; and an analyzing unit that Fourier-transforms data, which has the dc voltage component removed therefrom by the removing unit, so as to analyze the data.
REFERENCES:
patent: 4222050 (1980-09-01), Kiuchi et al.
patent: 2001-183450 (2001-07-01), None
M.I. Skolnik, “Introduction to Radar Systems” (second edition); McGraw-Hill Book Company; New York; 1980; section 4.5, pp. 119-125.
N.B. Lawrence et al., “Performance Results of an MTI/FFT Radar Signal Processor”; IEEE Publication CH1650-1/81/0000-0021 $00.75; copyrighted 1981.
B. Liu, “Clutter Suppression Using Recursive and Nonrecursive MTI Filters”; IEEE Transactions on Aerospace and Electronic Systems; vol. 24, No. 3; May 1988; pp. 210-217.
Patent Abstract of Japan, Publication No. 2001183450 A, Published on Jul. 6, 2001, in the name of Sayana.
Christie Parker and Hale, LLP
Fujitsu Ten Limited
Gregory Bernarr E.
LandOfFree
Radar does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3481825