Rate Adaptation and Reach Increase by Probabilistically Shaped 64-QAM: An Experimental Demonstration
Citations
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Cites methods from "Rate Adaptation and Reach Increase ..."
...The application of PS in optical communication is able to operate the systems more approach to the Shannon limit thus outperforming conventional modulation formats [2]–[4], [11]....
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Cites background or methods from "Rate Adaptation and Reach Increase ..."
...For square shaped constellations with points located on a Cartesian grid such as 64QAM, this becomes even easier by applying the corresponding 1-D distribution on I- and Q-dimensions separately [37]....
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...Probabilistic shaping (PS) [37] and geometric shaping (GS) [38] are possible approaches to constellation shaping....
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170 citations
Cites methods from "Rate Adaptation and Reach Increase ..."
...In the left plot, we illustrate the achievable FEC rates for the transmission experiment of [9]....
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...For this, the measurement x and y were taken from the transmission experiment in [9] which investigates four shaped modes OP 1 (H(X) = 5....
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References
598 citations
"Rate Adaptation and Reach Increase ..." refers background in this paper
...The concept of mismatched decoding [22], [23] is a powerful tool that allows to derive achievable rates and decoding rules in situations when the exact channel law is not known [24]–[26]....
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510 citations
"Rate Adaptation and Reach Increase ..." refers background or methods in this paper
...We use Constant Composition Distribution Matching (CCDM) as proposed in [12]....
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...As discussed in [12], only a few operations (mostly comparisons and re-scaling) are required per symbol, thus keeping the complexity low....
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...The key step is to introduce a distribution matcher (DM) [12] that generates a non-uniform modulation symbol sequence (see Fig....
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...The key device is the DM [12], [14], which transforms the sequence of data bits into a sequence of non-uniformly distributed (shaped) symbols....
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...The actual mapping fccdm can be implemented efficiently by arithmetic coding [12], [14]....
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417 citations
"Rate Adaptation and Reach Increase ..." refers background in this paper
...Literature [27], [28] suggests that it is reasonable to model the optical channel by a memoryless AWGN channel....
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