Patent ID: 6134281
Filing Date: 2000-10-17
Classification: G01S,H04L

Abstract:
A calibration method for a signal processing system, the calibration method comprising the steps of:selecting a digital down converter to calibrate;copying the selected digital down converter's settings into a calibration digital down converter;selecting a best polarization diversity detector signal path for the selected digital down converter;calculating an optimal phase offset value for an in-phase data signal of the selected digital down converter;calculating an optimal phase offset value for a quadrature phase data signal of the selected digital down converter;normalizing a gain value for the in-phase and quadrature phase signals of the selected digital down converter;updating the selected digital down converter with a determined best signal path, optimal in-phase offset value, optimal quadrature phase offset value, and normalized gain value; andrepeating each above step for each digital down converter in the signal processing system while the signal processing occurs simultaneously.