Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1998-02-10
2000-10-17
Chin, Stephen
Pulse or digital communications
Receivers
Interference or noise reduction
25022714, 25022715, 25022716, 25022717, 25022718, 25022727, G01J 104, G01J 142, G01J 508, G01J 400, H04B 710
Patent
active
061342815
ABSTRACT:
A calibration technique for a signal processing system, wherein a digital down converter is selected by a system controller for calibration. The digital down converter's settings are copied into a calibration digital down converter which mimics the operation of the selected digital down converter. A best polarization diversity detector signal path, an optimal phase offset value for an in-phase data signal, an optimal phase offset value for a quadrature phase data signal, and a normalized gain value for the in-phase and quadrature phase signals of the selected digital down converter are determined. The system controller updates the selected digital down converter with the determined optimal settings. This procedure is repeated for each digital down converter in the signal processing system, while the signal processing occurs simultaneously.
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Ferraro Eugene L.
Green James D.
Hershman Lawrence J.
Chin Stephen
Litton Systems Inc.
Rupert Paul N
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