Method and apparatus for calibration of a signal processing syst

Details Method and apparatus for calibration of a signal processing syst Method and apparatus for calibration of a signal processing syst

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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Homodyne Demodulation Scheme for Fiber Optic Sensors Using Phase Generated Carrier, Anthony Dandridge, Alan B. Tveten and Thomas G. Giallorenzi, IEEE Journal of Quantum Electronics, vol. QE-18, Oct. 1982.
TMC2330A Coordinate Transformer 16.times.16 Bit, 50 MOPS, Raytheon Electronics Semiconductor Division, Stock # /ds7002330A, Jun. 1997.
GC40414 Quad Receiver Chip Datasheet, Graychip, Inc., Graychip DSP Chips and Systems, Dec. 1, 1997.

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