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Optica Publishing Group
  • 2017 Conference on Lasers and Electro-Optics Pacific Rim
  • (Optica Publishing Group, 2017),
  • paper s1407

Sparse Volterra Model Based on Single Side-Band Optical NPAM-4 Direct-Detection System

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Abstract

Signal-to-signal beating interference (SSBI) is one of the main drawbacks of direct-detection based optical transmission systems. Volterra filter is a common equalization method to mitigate the nonlinear distortion. However, the computational complexity may be unpractical as the transmission capacity increases. In this paper, we demonstrate that the sparse Volterra can reduce the complexity significantly in a single-side band optical Nyquist pulse-shaped four-level pulse amplitude (NPAM-4) system. The experimental results show that sparse Volterra and full Volterra have comparable performance, while sparse Volterra only needs half kernels of full Volterra.

© 2017 Optical Society of America

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