Fade tolerant optical communication receiver

摘要

A system includes a first low noise amplifier (LNA) having a first gain to amplify an optical input signal and to generate an amplified optical output signal. The first gain is set to compensate for signal losses in the optical input signal due to atmospheric fading. A second LNA having a second gain amplifies the amplified optical output signal from the first LNA and generates a saturated output signal when the combined first and second gain of the first LNA and the second LNA exceeds a predetermined output saturation level of a photo detector.