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Following the Service-Oriented Architecture, a large number of diversified Cloud services are exposed as Web APIs (Application Program Interface), which serve as the contracts between the service providers and service consumers. Due to their massive and broad applications, any flaw in the cloud APIs may lead to serious consequences. API testing is thus necessary to ensure the availability, reliability,...
We investigate a non-data-aided chromatic dispersion estimation based on a polynomial fitting algorithm for root-raised-cosine (RRC) Nyquist spectrally shaped fiber transmission systems. We compare the performances of the estimation method on RRC spectrally shaped systems with regular non-return-to-zero systems. At a same symbol rate, a signal with a narrower spectrum has a lower estimation accuracy...
We propose a polynomial fitting algorithm based method for non-data-aided chromatic dispersion (CD) estimation in single carrier (SC) coherent optical systems with arbitrary modulation formats, and compare it with our previously proposed CD estimation method which is also based on the polynomial fitting algorithm but requires special modulation formats thus is a data-aided CD estimation method for...
We proposed a PMD monitoring/compensation method in frequency domain for coherent system. With 15 ps of average DGD, the PMD induced penalty for 100-Gbit/s QPSK system is reduced by 9 dB at symbol-error-ratio of 10−3.
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