Noise suppression apparatus and method for time division multipl

Details Noise suppression apparatus and method for time division multipl Noise suppression apparatus and method for time division multipl

1998-02-04

1999-06-29

Kim, Robert H.

Optics: measuring and testing

By particle light scattering

With photocell detection

356352, 385 12, G01B 902

Patent

active

059175974

ABSTRACT:
Leakage optical signals injected into a time division multiplexed sensor system are modulated during off periods in the duty cycle in the sensor interrogation signal. The leakage light is modulated such that its unwanted contributions to the sensor output signals are displaced in frequency from the base band frequency. This frequency displacement greatly reduces unwanted noise power in the received signals.

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