Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2008-01-08
2008-01-08
Chan, Wing (Department: 2616)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S335000, C370S342000, C375S346000, C375S350000
Reexamination Certificate
active
07317698
ABSTRACT:
An adaptive notch filter (ANF) module selectively filters a received wideband communication signal to eliminate narrowband interference that lies within the frequency spectrum of the wideband communication signal. To determine the presence of narrowband interference, the ANF module scans various known narrowband channels that lie within the frequency spectrum of the wideband communication signal and determines signal strengths for each of the narrowband channels. The signal strengths from the narrowband channels are compared to a threshold that is derived from the narrowband signal strengths. Narrowband channels having signal strengths that are greater than the threshold are determined to have interference.
REFERENCES:
patent: 3732500 (1973-05-01), Dishal et al.
patent: 3781705 (1973-12-01), Dishal et al.
patent: 3783397 (1974-01-01), Dishal et al.
patent: 3911366 (1975-10-01), Baghdady
patent: 4027264 (1977-05-01), Gutleber
patent: 4328591 (1982-05-01), Baghdady
patent: 4513249 (1985-04-01), Baghdady
patent: 4859958 (1989-08-01), Myers
patent: 4992747 (1991-02-01), Myers
patent: 5038115 (1991-08-01), Myers et al.
patent: 5168508 (1992-12-01), Iwasaki et al.
patent: 5185762 (1993-02-01), Schilling
patent: 5226057 (1993-07-01), Boren
patent: 5263048 (1993-11-01), Wade
patent: 5307517 (1994-04-01), Rich
patent: 5325204 (1994-06-01), Scarpa
patent: 5343496 (1994-08-01), Honig et al.
patent: 5497505 (1996-03-01), Koohgoli et al.
patent: 5541959 (1996-07-01), Myers
patent: 5570350 (1996-10-01), Myer et al.
patent: 5640385 (1997-06-01), Long et al.
patent: 5703874 (1997-12-01), Schilling
patent: 5758275 (1998-05-01), Cox et al.
patent: 5926761 (1999-07-01), Reed et al.
patent: 5966657 (1999-10-01), Sporre
patent: 5974101 (1999-10-01), Nago
patent: 5978362 (1999-11-01), Lee et al.
patent: 6020783 (2000-02-01), Coppola
patent: 6035213 (2000-03-01), Tokuda et al.
patent: 6104934 (2000-08-01), Patton et al.
patent: 6426983 (2002-07-01), Rakib et al.
patent: 2260653 CA (2000-01-01), None
patent: 2288633 CA (2000-04-01), None
patent: 0 704 986 (1996-04-01), None
patent: 0 704 986 (1996-04-01), None
patent: 0 812 069 (1997-12-01), None
patent: WO 0046929 (2000-08-01), None
H. Vincent Poor, et al., “Narrowband Interference Suppression in Spread Spectrum CDMA”, IEEE Personal Communications Magazine, Third Quarter, 1994, pp. 14-27.
L. Milstein, “Interference Rejection Techniques in Spread Spectrum Communications”, Proceedings of the IEEE, vol. 76, No. 6, Jun. 1988.
International Search Report for International Application No. PCT/CA00/00100 dated Apr. 6, 2000.
Written Opinion for International Application No. PCT/CA00/00100 dated Mar. 2, 2001.
International Preliminary Examination Report for International Application No. PCT/CA00/00100 Dated Apr. 27, 2001.
Written Opinion for International Application No. PCT/US01/11351 dated Apr. 25, 2002.
International Search Report for International Application No. PCT/US01/11351 dated Apr. 12, 2002.
Salgado-Galicia, Hector, et al., “A Narrowband Approach to Efficient PCS Spectrum Sharing Through Decentralized DCA Access Policies,” IEEE Personal Communications, Feb. 1997, pp. 24-34.
Jagger Charles E.
Tobia Micolino
Willetts Mark N.
Chan Wing
ISCO International, Inc.
Marshall & Gerstein & Borun LLP
Scheibel Robert C
LandOfFree
Interference detection, identification, extraction and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interference detection, identification, extraction and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interference detection, identification, extraction and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2764274