Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-01-11
2005-01-11
Ha, Dac V. (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S148000, C375S346000, C370S319000, C455S063300, C455S278100, C455S296000
Reexamination Certificate
active
06842476
ABSTRACT:
A method and apparatus for processing a received signal containing a desired burst and a co-channel interferer burst are disclosed. The invention includes receiving the received signal from a front end receiver. A time offset between the desired burst and the co-channel interferer burst is detected. A detection procedure is then selected based on the time offset between the desired burst and the co-channel interferer burst. Preferably, one of three detection procedures is selected based on the time offset detected and optionally the signal strength of the co-channel interferer burst. If a first or second time offset is detected, then a joint detection or an iterative detection procedure is selected and performed, respectively. Finally, if a third time offset is detected or if the co-channel interferer has a low signal strength, then a conventional detection procedure is selected and performed.
REFERENCES:
patent: 5222101 (1993-06-01), Ariyavisitakul et al.
patent: 5317323 (1994-05-01), Kennedy et al.
patent: 5838742 (1998-11-01), Abu-Dayya
patent: 5933768 (1999-08-01), Skold et al.
patent: 5937015 (1999-08-01), Dent et al.
patent: 6151487 (2000-11-01), Kim et al.
patent: 6167081 (2000-12-01), Porter et al.
patent: 6223040 (2001-04-01), Dam
patent: 6256486 (2001-07-01), Barany et al.
patent: WO0145289 (1991-06-01), None
patent: WO9611533 (1996-04-01), None
patent: 9838750 (1998-09-01), None
patent: WO9838750 (1998-09-01), None
patent: 9859443 (1998-12-01), None
patent: WO0223742 (2002-03-01), None
J. Proakis, “Digital Communications”, McGraw-Hill, Inc., New York, 1995, pp. 539-586.
Pekka A. Ranta et al., “Interference Cancellation by Joint Detection in Random Frequency Hopping TDMA Networks”, pp. 428-432.
Lindoff Bengt
Stenström Niklas
Ha Dac V.
Potomac Patent Group PLLC
Telefonaktiebolaget LM Ericsson (publ)
LandOfFree
Co-channel interference canceller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Co-channel interference canceller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Co-channel interference canceller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3425035