GAIN ADJUSTMENT METHOD, OPTICAL RECEIVING APPARATUS AND COMPUTER PROGRAM
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United States of America
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Feb 13, 2025
app pub date -
Dec 24, 2021
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Dec 24, 2021
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Abstract
A gain adjustment method in an optical transmission system that performs communication by a digital coherent system including an optical transmission device and an optical reception device includes converting an optical signal transmitted from the optical transmission device into an electrical signal, converting the electrical signal from an analog signal to a digital signal, performing first signal processing on the digital signal, performing adaptive equalization processing on the digital signal subjected to the first signal processing using a digital filter, correcting an amplitude of an output signal of the digital filter based on information of the amplitude and a phase of the output signal of the digital filter and the amplitude of a known transmission signal, and performing second signal processing on the output signal of the digital filter whose amplitude has been corrected.
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