G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 13/88 (2006.01) G01R 27/00 (2006.01) G01S 7/03 (2006.01) G01S 7/282 (2006.01) G01S 7/41 (2006.01)
Patent
CA 2359376
A method and apparatus is described for signal processing to identify an object in an environment. A precursor associated with an electromagnetic wave interacting with the object is received and a property of the object identified using precursor characteristics. The electromagnetic wave is transmitted with a characteristic including a pulse having a sharp rise; time so as to generate the precursor. The pulse is generated using a circuit including capacitive discharge and a semiconductor device such as a Drift Step Recovery Diode. Alternatively the pulse may be generated using a microwave diode switch and a broadband semiconductor amplifier or a traveling wave tube amplifier. The characteristic may also includes a signal with a phase reversal generated by dividing the electromagnetic signal and phase modulating the first electromagnetic signal with the divided signal to generate the phase reversal so as to generate the precursor. A receiver may further establish channels corresponding to the possible precursor spectra and associate each channel with a corresponding possible material property associated with the object including water generated precursor spectra, radar absorptive material generated precursor spectra, and metallic oxides generated precursor spectra. A color display may include an image of the object with possible material properties displayed in a corresponding color in proportion to respective values associated with received precursor spectra.
Lockheed Martin Corporation
Smart & Biggar
LandOfFree
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