SIGNAL AMPLIFICATION METHOD AND OPTICAL RECEIVING APPARATUS
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United States of America Patent
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Issued Date -
Oct 24, 2024
app pub date -
Aug 25, 2021
filing date -
Aug 25, 2021
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Abstract
There is provided a signal amplification method executed by an optical reception device, the method including: an electrical conversion step of converting an optical intensity modulation signal according to a frequency modulation signal which is converted from a frequency division multiplexing signal into the frequency modulation signal; a delay control step of controlling a delay amount of the frequency modulation signal based on a center frequency of the frequency modulation signal and a shift amount of a highest frequency of the frequency modulation signal; a delay detection step of demodulating the frequency modulation signal into the frequency division multiplexing signal by executing demodulation processing based on delay detection on the frequency modulation signal of which the delay amount is controlled; an amplification factor derivation step of deriving an amplification factor of the demodulated frequency division multiplexing signal based on the delay amount; and an amplification step of amplifying the demodulated frequency division multiplexing signal by the amplification factor.
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