Quadrature processed LIDAR system
| dc.contributor.assignee | Virginia Tech Intellectual Properties, Inc. | en |
| dc.contributor.inventor | Holton, Carvel E. | en |
| dc.date.accessed | 2016-08-19 | en |
| dc.date.accessioned | 2016-08-24T17:54:23Z | en |
| dc.date.available | 2016-08-24T17:54:23Z | en |
| dc.date.filed | 2001-09-20 | en |
| dc.date.issued | 2003-08-19 | en |
| dc.description.abstract | A method of generating in-quadrature signals is disclosed. The method comprises phase shifting a Doppler frequency-shifted signal; phase shifting a local oscillator signal; mixing the phase shifted Doppler frequency-shifted signal and the phase-shifted local oscillator signal generating thereby a signal which includes the phase-shifted Doppler frequency-shifted signal and a further phase-shifted local oscillator signal; and mixing the unphase-shifted Doppler frequency-shifted signal and the unphase-shifted local oscillator signal generating thereby a signal which includes the unphase-shifted local oscillator signal and a further phase-shifted Doppler frequency-shifted signal. A method of determining the velocity of an object is also disclosed. The method comprises receiving a Doppler frequency-shifted signal reflected or backscattered from the object; generating a local oscillator signal; based upon the received Doppler frequency-shifted signal and the local oscillator signal, generating an in-phase signal; based upon the received Doppler frequency-shifted signal and the local oscillator signal generating an in-quadrature signal; summing the in-phase signal and the in-quadrature signal; and transforming the summation of the in-phase signal and the in-quadrature signal. A lidar is disclosed comprising an optical system for transmitting an output signal to an object and receiving thereby a Doppler frequency-shifted signal reflected or backscattered from the object; a signal mixing assembly receptive of the Doppler frequency-shifted signal and a local oscillator signal generating thereby an in-phase signal and an in-quadrature signal; and a signal transformer for transforming the in-phase signal and an in-quadrature signals. A signal mixing system is disclosed comprising an array of signal couplers receptive of a Doppler frequency-shifted signal and a local oscillator signal generating thereby an in-phase signal which includes the unphase-shifted local oscillator signal and a phase-shifted Doppler frequency-shifted signal and an in-quadrature signal which includes the phase-shifted Doppler frequency-shifted signal and a further phase-shifted local oscillator signal; and a plurality of signal detectors receptive of the in-phase and in-quadrature signals. | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.applicationnumber | 9956634 | en |
| dc.identifier.patentnumber | 6608669 | en |
| dc.identifier.uri | http://hdl.handle.net/10919/72475 | en |
| dc.identifier.url | http://pimg-fpiw.uspto.gov/fdd/69/086/066/0.pdf | en |
| dc.language.iso | en_US | en |
| dc.publisher | United States Patent and Trademark Office | en |
| dc.subject.cpc | G01S7/4917 | en |
| dc.subject.cpc | G01S17/58 | en |
| dc.subject.cpc | G01S7/4818 | en |
| dc.subject.cpc | G01S7/491 | en |
| dc.subject.cpc | H04L27/206 | en |
| dc.subject.cpc | H04B10/63 | en |
| dc.subject.cpc | H04B10/64 | en |
| dc.subject.cpc | H04L27/1525 | en |
| dc.subject.cpc | H04L27/26 | en |
| dc.subject.uspc | 356/28.5 | en |
| dc.subject.uspcother | 356/5.9 | en |
| dc.subject.uspcother | 356/5.15 | en |
| dc.title | Quadrature processed LIDAR system | en |
| dc.type | Patent | en |
| dc.type.dcmitype | Text | en |
| dc.type.patenttype | utility | en |
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