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- W3204198757 abstract "This paper performs a detailed, multi-faceted analysis of key challenges and common design caveats related to the development of efficient neural networks (NN) based nonlinear channel equalizers in coherent optical communication systems. The goal of this study is to guide researchers and engineers working in this field. We start by clarifying the metrics used to evaluate the equalizers’ performance, relating them to the loss functions employed in the training of the NN equalizers. The relationships between the channel propagation model’s accuracy and the performance of the equalizers are addressed and quantified. Next, we assess the impact of the order of the pseudo-random bit sequence used to generate the – numerical and experimental – data as well as of the DAC memory limitations on the operation of the NN equalizers both during the training and validation phases. Finally, we examine the critical issues of overfitting limitations, the difference between using classification instead of regression, and batch-size-related peculiarities. We conclude by providing analytical expressions for the equalizers’ complexity evaluation in the digital signal processing (DSP) terms and relate the metrics to the processing latency." @default.
- W3204198757 created "2021-10-11" @default.
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- W3204198757 date "2022-07-01" @default.
- W3204198757 modified "2023-10-17" @default.
- W3204198757 title "Neural Networks-Based Equalizers for Coherent Optical Transmission: Caveats and Pitfalls" @default.
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- W3204198757 doi "https://doi.org/10.1109/jstqe.2022.3174268" @default.
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