Pulse or digital communications – Transmitters – Angle modulation
Reexamination Certificate
2008-07-22
2008-07-22
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Transmitters
Angle modulation
C380S268000
Reexamination Certificate
active
07403574
ABSTRACT:
A simplified scrambling scheme that unifies all signals of a satellite broadcasting system, including frame header (404), frame body (402) and pilot symbols (408) with a common reference phase. This results in the simplification and increased flexibility of the receiver front-end design without affecting the overall system performance. In many current communications systems with frame headers and pilot symbols, the phases of frame headers and pilot syrnbols are not designed to be aligned with any constellation points of the modulated data from the frame body. This scrambling scheme takes into account possible impact due to irregular phase changes between frame headers/pilot symbols and modulated data.
REFERENCES:
patent: 5144669 (1992-09-01), Faulkner et al.
patent: 6952480 (2005-10-01), Martin
patent: 2003/0099357 (2003-05-01), Ryu et al.
patent: 2004/0095904 (2004-05-01), Laroia et al.
Australian examination report in Australian counterpart application No. 2004302831 dated Dec. 6, 2007.
Written Opinion of the International Searching Authority dated Aug. 24, 2005 in counterpart International application PCT/US04/27981.
Australian Examination report dated Feb. 16, 2007 in counterpart Australian patent application 2004302831.
Australian Examination report dated Oct. 19, 2007 in counterpart Australian patent application 2004302831.
Chen Ernest C.
Lai Dennis
Lin Tung-Sheng
Lindsey William C.
Maitra Shamik
Ghebretinsae Temesghen
The DIRECTV Group Inc.
LandOfFree
Simplified scrambling scheme for satellite broadcasting systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Simplified scrambling scheme for satellite broadcasting systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simplified scrambling scheme for satellite broadcasting systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2767627