Chi-Hao Cheng

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Nonlinear distortion caused by fiber nonlinearity is a major performance-limiting factor in advanced optical communication systems. We proposed a nonlinear electrical equalization scheme based on the Wiener-Hammerstein model. Compared with other popular nonlinear compensation techniques such as the Volterra model, the Wiener-Hammerstein model approach has a(More)
A main drawback of Coherent Optical Orthogonal Frequency Division Multiplexing (CO-OFDM) system is its sensitivity to fiber nonlinearity. Nonlinear electrical equalizer based on Volterra model has been demonstrated capable of compensating fiber nonlinear distortion in an OOK or PSK optical communication system. However, the implementation complexity of a(More)
One of major issues of the advanced optical communication system is the signal distortion caused by fiber nonlinearity. Both predistorters and equalizers have been used for nonlinearity compensation and electrical compensation has become a popular choice among optical communication engineers in recent years. However, to the best of the authors' knowledge,(More)
We implemented a software-defined radio based on a recently developed unified framework for constructing various spectrally-modulated, spectrally-encoded (SMSE) signals. Two waveforms, Multi-Carrier Code Division Multiple Access (MC-CDMA) and Transform-Domain Communication System (TDCS) were selected to demonstrate the capabilities of the framework. A(More)
Automatic modulation classifiers (AMC) are one of the basic building blocks of electronic warfare receivers and cognitive radios. Although many research papers on AMC algorithms have been published, very few results on their implementation are available. This paper presents a feature-based AMC built upon a software-defined radio platform. The developed AMC(More)