Equalization and De-noise Techniques for Optical Communication in Time-varied Band-limited Channel
Weibiao Chen · ACTA PHOTONICA SINICA · 2008
A semi-blind equalization method is proposed based on combination of adaptive and blind equalization techniques,which is more effective for optical signal processing in time-varied band-limited channel.The numerical simulation of Poisson noise OOK optical pulse signal in a band-limited channel using digital equalization techniques is performed,and the results are compared.The semi-blind equalization matchs the channel faster and sustains convergence were identified.In addition,the wavelet de-noise technique is introduced in the de-nosing area of optical signa process.The criteria of choosing wavelet basises is obtained that smooth wavelet soft threshold method is better.The corresponding numerical simulation is also conducted.