Method for determining signal quality in optical...

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element

Reexamination Certificate

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C398S025000, C398S026000, C398S027000

Reexamination Certificate

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07116454

ABSTRACT:
A method for determining signal quality in optical transmission systems, wherein the effective signal-to-noise ratio is determined by measuring amplitude histograms of a signal and by calculating characteristic histogram moments and additional interference is ascertained by comparing the characteristic histogram moments with the optical signal-to-noise ratio.

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patent: WO 00/41345 (2000-07-01), None
I. Shake, H. takara, S. Kawanishi. Y. Yabayashi, “Optical signal quality monitoring method based on optical sampling”, Oct. 29, 1998, Electronics Letters vol. 34 No. 22.
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XP-000886728—Shake et al., “Optical Signal Quality Monitoring Method Based on Optical Sampling”, Electronics Letters Oct. 29, 1998, vol. 34, No. 22, pp. 2152-2154.

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