Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1998-10-06
1999-05-18
Kim, Robert H.
Optics: measuring and testing
By particle light scattering
With photocell detection
356351, G01B9/02
Patent
active
059055740
ABSTRACT:
A circuit for canceling cross polarization interference has a first signal input and a second signal input. An adjustable cancellation network circuit is coupled to the first input and the second input. The adjustable cancellation network circuit has a first programmable vector modulator having a first weight and a second programmable vector modulator having a second weight. The first weight is correlated to the first input signal to obtain a first output signal. The second weight is correlated with the second input signal to obtain a second output signal. A performance measurement circuit is coupled to the cancellation network circuit and receives the first output signal and the second output signal. The performance measurement circuit generates a first correlated signal corresponding to the amount of interference in the first correlated signal and a second correlated signal corresponding to the amount of interference in the second correlation signal. A controller is coupled to the cancellation network and performance measurement circuit. The controller receives the first correlated signal and the second correlated signal. The controller calculates an updated first weight and second weight in response to the first correlated signal and the second correlated signal.
REFERENCES:
patent: 5694216 (1997-12-01), Riza
patent: 5838441 (1998-11-01), Satorius et al.
Burch Ronald W.
Sako Paul Y.
Strodtbeck Andrew L.
Vollbrecht Jennifer L.
Grunebach Georgann S.
Hughes Electronics Corporation
Kim Robert H.
Sales M. W.
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