研究目的
Investigating the impact of the assumed channel distribution on the achievable rate in coherent optical transmission systems for distributions in up to four dimensions.
研究成果
The study concludes that for conventional WDM systems without inline dispersion compensation, a circularly symmetric complex Gaussian distribution is a good approximation of the channel. For channels with inline dispersion compensation, more sophisticated four-dimensional distributions can provide gains in the achievable information rate. The highest gain is observed for a 4D correlated Gaussian distribution in nonlinear channels.
研究不足
The study is limited to coherent optical transmission systems and does not explore other types of optical communication systems. The impact of channel distribution assumptions is investigated only up to four dimensions.
1：Experimental Design and Method Selection:
The study involves experimental investigation of mutual information and generalized mutual information for coherent optical transmission systems, focusing on the impact of channel distribution assumptions on achievable rates.
2：Sample Selection and Data Sources:
The experiments use single channel and wavelength-division multiplexing (WDM) transmission over links with and without inline dispersion compensation.
3：List of Experimental Equipment and Materials:
The setup includes coherent optical transmission systems, WDM systems, and systems with and without inline dispersion compensation.
4：Experimental Procedures and Operational Workflow:
The study compares different models of the channel distribution and its impact on the achievable rate for different transmission scenarios.
5：Data Analysis Methods:
The analysis involves comparing mutual information and generalized mutual information estimates under different channel distribution assumptions.
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