Inventor
CHA ALAN
US12 patents
⚠️ This page may combine multiple inventors who share the name “CHA ALAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DIRECTV GROUP INC
8 patentsUS7257418B1Aug 14, 2007
Rapid user acquisition by a ground-based beamformer
DIRECTV GROUP INC59 citations97
US6941138B1Sep 6, 2005
Concurrent communications between a user terminal and multiple stratospheric transponder platforms
DIRECTV GROUP INC79 citations97
US6895217B1May 17, 2005
Stratospheric-based communication system for mobile users having adaptive interference rejection
DIRECTV GROUP INC69 citations97
US6756937B1Jun 29, 2004
Stratospheric platforms based mobile communications architecture
DIRECTV GROUP INC43 citations92
US6751458B1Jun 15, 2004
Architecture utilizing frequency reuse in accommodating user-link and feeder-link transmissions
DIRECTV GROUP INC28 citations92
US7317916B1Jan 8, 2008
Stratospheric-based communication system for mobile users using additional phased array elements for interference rejection
DIRECTV GROUP INC26 citations91
US7890052B2Feb 15, 2011
Stratospheric-based communication system for mobile users using additional phased array elements for interference rejection
DIRECTV GROUP INC7 citations82
US6763242B1Jul 13, 2004
Resource assignment system and method for determining the same
DIRECTV GROUP INC9 citations73