Performance Prediction of Nonbinary Forward Error Correction in Optical Transmission Experiments

Abstract

In this paper, we compare different metrics to predict the error rate of optical systems based on nonbinary forward error correction (FEC). It is shown that the correct metric to predict the performance of coded modulation based on nonbinary FEC is the mutual information. The accuracy of the prediction is verified in a detailed example with multiple constellation formats, FEC overheads in both simulations and optical transmission experiments over a recirculating loop. It is shown that the employed FEC codes must be universal if performance prediction based on thresholds is used. A tutorial introduction into the computation of the threshold from optical transmission measurements is also given.

arXiv commentsubmitted to IEEE/OSA Journal of Lightwave Technology

References in corpus (8)

• Channel polarization: A method for constructing capacity-achieving codes for symmetric binary-input memoryless channels
• Four-Dimensional Coded Modulation with Bit-wise Decoders for Future Optical Communications
• On Achievable Rates for Long-Haul Fiber-Optic Communications
• Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems
• Capacity of a Nonlinear Optical Channel with Finite Memory
• Impact of 4D channel distribution on the achievable rates in coherent optical communication experiments
• Information Rates of Next-Generation Long-Haul Optical Fiber Systems Using Coded Modulation
• On the Design of Universal LDPC Codes

Cited by in corpus (13)

• Achievable Information Rates for Fiber Optics: Applications and Computations
• Hierarchical Distribution Matching for Probabilistically Shaped Coded Modulation
• Polarization-ring-switching for nonlinearity-tolerant geometrically-shaped four-dimensional formats maximizing generalized mutual information
• Geometric Shaping of 2-Dimensional Constellations in the Presence of Laser Phase Noise
• Performance Metrics for Systems with Soft-Decision FEC and Probabilistic Shaping
• Capacity Lower Bounds of the Noncentral Chi-Channel with Applications to Soliton Amplitude Modulation
• Achievable Information Rates for Coded Modulation with Hard Decision Decoding for Coherent Fiber-Optic Systems
• Low-complexity Near-optimum Symbol Detection Based on Neural Enhancement of Factor Graphs
• Performance Prediction Recipes for Optical Links
• An Experimental Comparison of Coded Modulation Strategies for 100 Gbit/s Transceivers
• Performance Metrics for Communication Systems with Forward Error Correction
• Compressed Shaping: Concept and FPGA Demonstration
• Capacity Bounds under Imperfect Polarization Tracking