Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Reexamination Certificate
2008-07-29
2008-07-29
Phan, Dao L (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
C342S174000, C342S420000, C375S136000
Reexamination Certificate
active
07405696
ABSTRACT:
A method for calibrating an antenna and signal processing system enabling angle of arrival (AOA) determination for a frequency hopping signal, in which a calibration coefficient is determined in response to one or more calibration signals injected into the system at one or more of the frequencies in the hopping sequence and proximate in time to reception of the communication signal. The calibration coefficients are reflective of a frequency and time dependent parameter of a path between the antenna and wireless location sensor. The AOA is determined as a function of the calibration coefficient and the radio frequency energy of the received communication signal. Several embodiment of the method are illustrated.
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patent: 6184829 (2001-02-01), Stilp
patent: 6339399 (2002-01-01), Andersson et al.
patent: 6377214 (2002-04-01), Melville et al.
patent: 6580393 (2003-06-01), Holt
patent: 2004/0032913 (2004-02-01), Dinur
Alles Martin C.
Blackburn Doug
Carlson John P.
Gravely Thomas B.
Kennedy, Jr. Joseph P.
Andrew Corporation
Duane Morris LLP
Phan Dao L
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