Radar device

Details Radar device Radar device

2007-10-15

2009-06-16

Sotomayor, John B (Department: 3662)

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

With particular circuit

Complex signal

C342S196000, C342S02600R, C342S192000

Reexamination Certificate

active

07548193

ABSTRACT:
For enabling determination on whether a sign of a Doppler frequency or a target angle is positive or negative even when only a real signal can be obtained as a received signal, the present invention provides a radar device including: an oscillator; a transmitting element; a distributor; receivers using the local wave to detect the received wave to generate a real received signal; a plurality of inter-channel phase correcting units; a spatial frequency information generating unit for converting a received signal string obtained by gathering a plurality of phase-corrected received signals into a signal in a spatial frequency domain; and a sign selecting unit for selecting a signal having a larger amplitude in a spatial frequency spectrum when two signals from a positive direction and a negative direction which are symmetrical with respect to a direction at approximately 0 degree.

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U.S. Appl. No. 11/870,106, filed Oct. 10, 2007, Toshio Wakayama, et al.
Richard J. Doviak, et al., “Doppler Radar and Weather Observation”, 3. Radar and It's Environment, Second Edition, Academic Press, Inc., 1993, pp. 30-53 and 2 cover pages.
Merrill Ivan Skolnik, “Introduction to Radar Systems”, McGraw-Hill Higher Education, Chapter 9, Third Edition, 2001, pp. 610-615 and cover page.

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