Telecommunications – Transmitter and receiver at separate stations – Distortion – noise – or other interference prevention,...
Reexamination Certificate
2007-02-26
2010-10-26
Urban, Edward (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Distortion, noise, or other interference prevention,...
C455S254000, C455S266000, C455S296000, C455S302000, C455S306000
Reexamination Certificate
active
07822385
ABSTRACT:
Adjacent channel interference (ACI) suppression is achieved by selectively applying one or more pre-calculated fixed filters only when necessary, thereby preserving the sensitivity of the receiver. An energy detector accurately detects adjacent channel interference in the frequency band of the desired signal so that the likelihood of a false detection of ACI is very low. If the energy detector detects adjacent channel interference is present in the band of the desired signal, then the received signal is selected to be filtered by the pre-calculated filter, e.g., a low pass filter. Otherwise, the pre-calculated filter is bypassed. In either case, additional ACI suppression processing may be employed.
REFERENCES:
patent: 3503069 (1970-03-01), Lloyd
patent: 5493717 (1996-02-01), Schwarz
patent: 5564093 (1996-10-01), Matsumoto
patent: 6047171 (2000-04-01), Khayrallah et al.
patent: 6352562 (2002-03-01), Willey et al.
patent: 6834043 (2004-12-01), Vook et al.
patent: 6901243 (2005-05-01), Jayaraman et al.
patent: 6952562 (2005-10-01), Hantke et al.
patent: 7421261 (2008-09-01), Sahlin et al.
patent: 2003/0087622 (2003-05-01), Jayaraman et al.
patent: 2003/0171123 (2003-09-01), Laakso et al.
patent: 2004/0252631 (2004-12-01), Park
patent: WO 2007/126369 (2007-08-01), None
International Search Report and Written Opinion mailed Nov. 6, 2007 in corresponding PCT/SE2007/050168.
Rao, A, “Adaptive Algorithms for Spatial Adaptive Interference Rejection” Personal Wireless Communications, 2202 IEEE International Conference , Dec. 15-17, 2002, pp. 326-329.
Hanidu Ganiyu
Nixon & Vanderhye P.C.
Telefonaktiebolaget LM Ericsson (publ)
Urban Edward
LandOfFree
Adjacent channel interference supression does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjacent channel interference supression, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjacent channel interference supression will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4235160