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Practical Solutions for 400 Gbit/s Data Center Transmission

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arxiv 2009.10585 v1 pith:RLESX55S submitted 2020-09-22 eess.SP

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keywords gbitcenterdatasolutionschannelscombiningdetecteddirectly
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We review three solutions for low-cost data center interconnects with a target reach of up to 80 km. Directly detected DMT, PAM-4 and multi-band CAP are promising modulation schemes, enabling 400 Gbit/s by combining eight channels of 56 Gbit/s.

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