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Class Information
Number: 342/418
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > Direction-finding receiver only > Doppler
Description: Subject matter wherein the received signals have an apparent change in frequency due to the doppler effect.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8552908 Method and apparatus for implementing high fidelity Doppler phase and time effects in advanced EW stimulus systems Oct. 8, 2013
8355473 Methods and systems with simplified doppler spread classification Jan. 15, 2013
8340588 Handheld synthetic antenna array Dec. 25, 2012
8326316 Portable wireless terminal and moving velocity detecting method for portable wireless terminal Dec. 4, 2012
8260324 Establishing wireless links via orientation Sep. 4, 2012
8050691 Method and arrangements in a mobile telecommunication network Nov. 1, 2011
7995682 Method and apparatus for performing signal processing using historical correlation data Aug. 9, 2011
7978137 Performance and power management in direction of arrival determination by utilizing sensor information Jul. 12, 2011
7768963 System and method of improving sampling of WLAN packet information to improve estimates of Doppler frequency of a WLAN positioning device Aug. 3, 2010
7719469 Device and method for position measurement by means of linear doppler shifts generated May. 18, 2010
7653347 Doppler compensation control for radio transmission Jan. 26, 2010
7548202 Doppler radio direction finding antenna Jun. 16, 2009
7548203 Performance and power management in direction of arrival determination by utilizing sensor information Jun. 16, 2009
7548201 Method and system for automatically analyzing and modifying cable television signal leak information Jun. 16, 2009
7495611 Method for determining signal direction using artificial doppler shifts Feb. 24, 2009
7414581 Method for improved signal to noise ratio estimation Aug. 19, 2008
7409226 Use of doppler direction finding to improve signal link performance in a wireless communication environment Aug. 5, 2008
7365679 Positioning apparatus, control method of positioning apparatus, control program for positioning apparatus, and computer-readable recording medium having control program for positioning apparat Apr. 29, 2008
7109920 Moving platform position determination system and method Sep. 19, 2006
7082155 Reception level measuring system Jul. 25, 2006
7054717 Robotic wash cell using recycled pure water May. 30, 2006
6806828 Passive range and angle measurement system and method Oct. 19, 2004
6801162 Doppler-based automated direction finding system and method for locating cable television signal leaks Oct. 5, 2004
6727851 System for signal emitter location using rotational doppler measurement Apr. 27, 2004
6700537 Method for calibrating a wideband direction finding system Mar. 2, 2004
6646601 Direction finding method Nov. 11, 2003
6608592 Location system using beacon transmitters Aug. 19, 2003
6469657 FFT-based filtering for low-quality signal direction finding Oct. 22, 2002
6459955 Home cleaning robot Oct. 1, 2002
6437742 Rotating doppler receiver Aug. 20, 2002
6427121 Global positioning system tag system Jul. 30, 2002
6407699 Method and device for rapidly extracting time and frequency parameters from high dynamic direct sequence spread spectrum radio signals under interference Jun. 18, 2002
6366762 System and method for measuring round trip delay on the paging and access channels Apr. 2, 2002
6333713 Direction estimating apparatus, directivity controlling antenna apparatus, and direction estimating method Dec. 25, 2001
6329947 System for processing directional signals Dec. 11, 2001
6317077 Method and system of determining user terminal position using multiple satellites Nov. 13, 2001
6313786 Method and apparatus for measurement processing of satellite positioning system (SPS) signals Nov. 6, 2001
6288674 Wireless communication system utilizing doppler diversity Sep. 11, 2001
6268829 Doppler direction finder and method of location using doppler direction finder Jul. 31, 2001
6184831 Method and system for determining location and velocity of electromagnetic emitters using doppler frequency measurements Feb. 6, 2001
6163297 Apparatus and method for locating an emitter using RF carrier or PRF measurement ratios Dec. 19, 2000
6151353 Pre-acquisition frequency offset removal in a GPS receiver Nov. 21, 2000
6137441 Accurate range and range rate determination in a satellite communications system Oct. 24, 2000
6067049 Reception apparatus May. 23, 2000
6061021 Locatable mobile cellular telephony terminal May. 9, 2000
5995045 Method and system of doppler correction for mobile communications systems Nov. 30, 1999
5990834 Radar angle determination with music direction finding Nov. 23, 1999
5878330 Satellite communications system including automatic frequency control Mar. 2, 1999
5867124 Processing an encoded marker Feb. 2, 1999
5774087 Apparatus for measuring moving emitter elevation and azimuth direction from doppler change measurements Jun. 30, 1998

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