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Class Information
Number: 342/420
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > Direction-finding receiver only > With error or deviatioan compensator or eliminator
Description: Subject matter including means which apply to the direction indication, a correction for known errors of the indication or for a desired deviation from the indication, or which are provided with means to eliminate or reduce the effects of unwanted signals or for deviations in the signal wave caused by disturbing influences.

Sub-classes under this class:

Class Number Class Name Patents
342/421 Pulse-type noise elimination or compensation (e.g., sky waves) 9

Patents under this class:

Patent Number Title Of Patent Date Issued
8704663 Work direction determining method and device, and work provided with direction determining function Apr. 22, 2014
8456281 Non-contact IC medium communication device Jun. 4, 2013
8410981 Managing dimensional error in a direction finding antenna array Apr. 2, 2013
8149167 System and method for removing channel phase error in a phase comparison direction finder Apr. 3, 2012
8040279 Measuring positions Oct. 18, 2011
8019357 System and method for estimating positioning error within a WLAN-based positioning system Sep. 13, 2011
7952521 Multiparametric direction finding method comprising the separation of the incidence and nuisance parameters May. 31, 2011
7898476 Method and system for controlling the direction of an antenna beam Mar. 1, 2011
7856234 System and method for estimating positioning error within a WLAN-based positioning system Dec. 21, 2010
7671800 Beamforming apparatus and method in a smart antenna system Mar. 2, 2010
7598910 Direction finding and mapping in multipath environments Oct. 6, 2009
7499803 System and method for calibrating on-board aviation equipment Mar. 3, 2009
7453398 Process compensating for array antenna radiating element positioning errors Nov. 18, 2008
7405696 Method for calibrating and AOA location system for frequency hopping air interfaces Jul. 29, 2008
7379019 Method for angle of arrival determination on frequency hopping air interfaces May. 27, 2008
7379020 Apparatus and method for estimating direction of arrival of radio wave May. 27, 2008
7271764 Time of arrival estimation mechanism Sep. 18, 2007
7127218 Scanning antenna diversity system for FM radio for vehicles Oct. 24, 2006
6947734 Method and system for location accuracy analysis Sep. 20, 2005
6897821 Spacecraft off-gimbal IRU precision payload pointing and disturbance rejection system May. 24, 2005
6861983 Method and apparatus for reducing electromagnetic interference and jamming in GPS equipment operating in rolling environments Mar. 1, 2005
6839025 Precision direction finding sensing systems and methods Jan. 4, 2005
6690458 Methods and apparatuses for reconstructing angle information Feb. 10, 2004
6334218 Device for receiving satellite broadcast and a receiving method therefor Dec. 25, 2001
6266585 Gyrocompassing by intermittent GPS interferometry Jul. 24, 2001
6230018 Devices and processing in a mobile radio communication network having calibration terminals May. 8, 2001
6184830 Compensation of direction finding estimates for polarimetric errors Feb. 6, 2001
5570099 TDOA/FDOA technique for locating a transmitter Oct. 29, 1996
5543803 Fail safe receiver system Aug. 6, 1996
5122807 Motion-compensated direction finding system Jun. 16, 1992
5059969 GPS satellite signal tracking method for GPS receivers Oct. 22, 1991
5039991 Perturbation modeling system for use in processing direction-finding antenna outputs Aug. 13, 1991
4855748 TCAS bearing estimation receiver using a 4 element antenna Aug. 8, 1989
4754280 Attitude sensing system Jun. 28, 1988
4613977 Digital Navstar receiver Sep. 23, 1986
4532519 Phased array system to produce, steer and stabilize non-circularly-symmetric beams Jul. 30, 1985
4408207 Angular error detecting device Oct. 4, 1983
4395778 Undesired signal canceller Jul. 26, 1983
4348676 Automatic phase alignment system for a tracking antenna Sep. 7, 1982
4335384 Logarithmic amplifier calibration means Jun. 15, 1982
4308539 Compensated phased array antenna Dec. 29, 1981
4308620 System for maintaining phase coincidence between a carrier wave and sidebands produced by a transmitter Dec. 29, 1981
4303922 Method for reducing errors due to source amplitude modulation in a sequential amplitude comparison direction finding system Dec. 1, 1981
4203114 Digital bearing indicator May. 13, 1980
4092645 Radar jammer homing circuit May. 30, 1978

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