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AssigneeFujitsu Limited
InventorsLei Li, Zhenning Tao, Hisao Nakashima
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The present invention relates to an optical coherent receiver and an apparatus for and a method of monitoring performance thereof. The apparatus for monitoring performance of the optical coherent receiver makes use of a first signal and a second signal from the optical coherent receiver to monitor performance of the optical coherent receiver, and comprises a first subtracter, for subtracting the second signal from the first signal to obtain a first subtraction result; a squarer, for obtaining a square of the first subtraction result; a delayer, for delaying the first subtraction result; a multiplier, for multiplying the first subtraction result with the delayed first subtraction result; and a second subtracter, for subtracting the result of the multiplier from the result of the squarer.
An apparatus for monitoring performance of an optical coherent receiver, the apparatus making use of a first signal and a second signal from the optical coherent receiver to monitor performance of the optical coherent receiver, and the apparatus comprising:
A method of monitoring performance of an optical coherent receiver, the method making use of a first signal and a second signal from the optical coherent receiver to monitor performance of the optical coherent receiver, and the method comprising:
Dependencies are inferred from the claim text.