Pulse or digital communications – Repeaters – Testing
Patent
1992-06-29
1993-06-29
Barron, Jr., Gilberto
Pulse or digital communications
Repeaters
Testing
375 96, 375102, 370 18, H04B 110, H04L 2732, H03D 1300
Patent
active
052241220
ABSTRACT:
A spread-spectrum noise canceller (182) is provided. A received phase and a received amplitude for a first (216) and a second (236) component of a received spread-spectrum signal (200) is determined. The second component (236) is a replica of the first component (216) which was received at a different time. In addition, the spread-spectrum signal (200) includes a known signal. A portion of a spread-spectrum noise signal in the received signal (200) is canceled by generating an estimated signal (270) by spreading (260) the known signal at the second component received phase (204) with the known signal at the first component received phase (224) and adjusting a gain (268) of an integrated form of the spread known signal as a function of the received amplitudes of the first (216) and the second (236) components. Subsequently, the known signal is processed out of the received spread-spectrum signal (200) by subtracting (166) the estimated signal (270) from a demodulated form (216, 236) of the received spread-spectrum signal (200).
REFERENCES:
patent: 3374435 (1968-03-01), Engel
patent: 3617900 (1971-11-01), Fink et al.
patent: 3667050 (1972-05-01), Gibson
patent: 3699463 (1972-10-01), Stone
patent: 4470138 (1984-09-01), Gutleber
patent: 4472814 (1984-09-01), Gutleber
patent: 4472815 (1984-09-01), Gutleber
patent: 4475214 (1984-10-01), Gutleber
patent: 4475215 (1984-10-01), Gutleber
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 4914675 (1990-04-01), Iwamatsu et al.
patent: 5056109 (1991-10-01), Gilhousen et al.
patent: 5099493 (1992-03-01), Zeger et al.
patent: 5101501 (1992-03-01), Gilhousen et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5105435 (1992-04-01), Stilwell
"A Communication Technique for Multipath Channels" Proceeding of the IRE R. Price.
The Transactions of the Institute of Electronics, Information and Communications Engineers vol. E71, No. 3 (Mar. 1988) "Spread Spectrum Multiple Access System with Intrasystem Interference Cancellation" Tatsuro Masamura.
Barron Jr. Gilberto
Dempster Shawn B.
Motorola Inc.
LandOfFree
Method and apparatus for canceling spread-spectrum noise does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for canceling spread-spectrum noise, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for canceling spread-spectrum noise will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1761696