Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6888376 | Optical Fiber Technology | 2018 | 5 Pages |
Abstract
Signal-to-signal beating interference (SSBI) is one of the main drawbacks in direct-detection based optical transmission systems. Volterra filter is a common equalization method to mitigate the nonlinear distortion. However, the computational complexity may be unacceptable as the transmission capacity increases. In this paper, we propose a sparse Volterra model combining the feed forward equalization (FFE) and higher order terms of a modified Volterra filter with Schmidt orthogonal searching to mitigate the linear and nonlinear interference and reduce the complexity significantly in an optical single-side band (SSB) Nyquist pulse-shaped four-level pulse amplitude (NPAM-4) system. The experimental results show that the sparse Volterra filter and full Volterra filter have comparable performance, but the former only needs half kernels of the latter.
Keywords
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Physical Sciences and Engineering
Computer Science
Computer Networks and Communications
Authors
Hao Ying, Mingyue Zhu, Jing Zhang, Xingwen Yi, Yang Song, Kun Qiu,