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US 10,708,035 B2Granted
Signal processing device and signal processing method
AssigneeFujitsu Limited
InventorsTomofumi Oyama, Hisao Nakashima
Life of this patent
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Abstract
A signal processing device includes: a filter configured to perform an adaptive equalization process of a signal, on a basis of a filter coefficient; an updater configured to update the filter coefficient, on a basis of amplitude of the signal and a target value of the amplitude; and a corrector configured to correct the target value, on a basis of the amplitude of the signal.
Claims6
A signal processing device of a receiver that receives an optical signal transmitted by a transmitter, comprising:
- a converting circuit configured to convert the optical signal into an electrical signal;
- a filter configured to perform an adaptive equalization process of the electrical signal, on a basis of a filter coefficient;
- an update circuit configured to update the filter coefficient, on a basis of amplitude of the electrical signal and a target value of the amplitude for the adaptive equalization of the electrical signal;
- a calculation circuit configured to calculate a first difference between the amplitude of the electrical signal output from the filter and a theoretical amplitude of the electrical signal without signal distortion;
- and
- a correction circuit configured to correct the target value, on a basis of the first difference,
- wherein the update circuit calculates the filter coefficient, on a basis of the amplitude of the electrical signal input to the filter, and a second difference between the amplitude of the electrical signal output from the filter and the target value corrected by the correction circuit.
4 more elements
A signal processing method for a receiver that receives an optical signal transmitted by a transmitter, comprising:
- converting the optical signal into an electrical signal;
- performing an adaptive equalization process of the electrical signal, on a basis of a filter coefficient;
- updating the filter coefficient, on a basis of amplitude of the electrical signal and a target value of the amplitude for the adaptive equalization of the electrical signal;
- calculating a first difference between the amplitude of the electrical signal output from the filter and a theoretical amplitude of the electrical signal without signal distortion;
- and
- correcting the target value, on a basis of the first difference,
- wherein the updating includes calculating the filter coefficient, on a basis of the amplitude of the electrical signal input to the filter, and a second difference between the amplitude of the electrical signal output from the filter and the target value corrected by the correction circuit.
4 more elements
Dependencies are inferred from the claim text.