Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2006-09-01
2011-11-01
Afshar, Kamran (Department: 2617)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C381S092000, C381S122000, C324S130000, C706S024000, C455S570000
Reexamination Certificate
active
08050717
ABSTRACT:
In a signal processing system, a set of channel signals from an array of sensors of different operating characteristics are processed in calibration circuitry that calculates individual average values of the channel signals and calculates an average of the individual average values of channel signals as a reference value. Reciprocal calculators calculate reciprocal values of the individual average values of the channel signals. Scaling circuitry scales the reciprocal values by the reference value to produce a set of amplitude calibration signals and scales the channel signals by the calibration signals respectively. As a result, the channel signals are normalized by their own average values and scaled by the reference value to produce a set of calibrated channel signals.
REFERENCES:
patent: 6549627 (2003-04-01), Rasmusson et al.
patent: 2003/0076965 (2003-04-01), Janse et al.
patent: 2004/0165735 (2004-08-01), Opitz
patent: 2005/0018861 (2005-01-01), Tashev
patent: 2005/0276423 (2005-12-01), Aubauer et al.
patent: 2006/0032357 (2006-02-01), Roovers et al.
patent: 5-111090 (1993-04-01), None
patent: 7-131886 (1995-05-01), None
patent: 11-52977 (1999-02-01), None
patent: 2002-502193 (2002-01-01), None
patent: 2002-99297 (2002-04-01), None
patent: 3337671 (2002-08-01), None
patent: 2002-540696 (2002-11-01), None
patent: 2004-502367 (2004-01-01), None
patent: 2004-343700 (2004-12-01), None
patent: 2005-538633 (2005-12-01), None
G.L. Fudge et al., “A Calibrated Generalized Sidelobe Canceller for Wideband Beamforming,” IEEE Transactions of Signal Processing, vol. 42:10, Oct. 1994, pp. 2871-2875.
O. Hoshuyama et al., “Robust Adaptive Beamforming,” Microphone Arrays, Springer 2001, pp. 87-109.
N. K. Jablon, Adaptive Beamforming with the Generalized Sidelobe Canceller in the Presence of Array Imperfections, IEEE Transactions on Antennas and Propagation, vol. 34:8, Aug. 1986, pp. 996-1012.
Osamu Hoshuyama et al., A Robust Adaptive Beamformer for Microphone Arrays with a Blocking Matrix Using Constrained Adaptive Filters, IEEE Transaction on Signal Processing, vol. 47, No. 10, Oct. 1999, pp. 2677-2684.
Afshar Kamran
Foley & Lardner LLP
NEC Corporation
Obayanju Omoniyi
LandOfFree
Signal processing system and method for calibrating channel... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal processing system and method for calibrating channel..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal processing system and method for calibrating channel... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4304773