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Probabilistic Shaping Method Based on Asymmetric Polygon Modulation and Bit-Level Ontology Labeling

A polygonal, bit-level technology, applied in the field of optical transmission, can solve the problems of multi-space gaps, reduce probability shaping gain, and difficulty in fully improving system performance, so as to improve signal-to-noise ratio, energy concentration, and transmission performance. Effect

Active Publication Date: 2020-12-29
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

However, the conventional square or star QAM constellations have more space gaps when the signal converges in the decision area, which makes it difficult to fully improve the system performance and reduces the shaping gain of probability shaping

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  • Probabilistic Shaping Method Based on Asymmetric Polygon Modulation and Bit-Level Ontology Labeling
  • Probabilistic Shaping Method Based on Asymmetric Polygon Modulation and Bit-Level Ontology Labeling
  • Probabilistic Shaping Method Based on Asymmetric Polygon Modulation and Bit-Level Ontology Labeling

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Embodiment Construction

[0033] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] see figure 1 , figure 2 and Figure 9 , the present invention proposes an improved design method for 2-dimensional QAM signal constellation, and combines it with the proposed bit-level probability shaping method. The improvement method of the constellation diagram is based on the principle of the same minimum Euclidean distance in the central area, and the constellation points in the border area are relatively sparse. The way of probability shaping is to reduce the occurrence probability of constellation points in the edge area by mapping 32 constellation points to 7 constellation points. The main part of the invention is a bit-level ontology label probability shaping distribution matcher and a QAM signal constellation mapping method. The function of the bit-level ontology label probability shaping distribution matcher is to class-en...

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Abstract

The invention discloses a probability forming method based on asymmetric polygon modulation and a bit-level body tag. According to the invention, an original signal constellation diagram is optimized;under the condition of meeting a minimum Euclidean distance, space advantages of the constellation diagram are intensified, and an asymmetric polygon QAM constellation diagram is proposed. Meanwhile,by combining the asymmetric polygon QAM constellation diagram with a proposed bit-level body tag probability forming mode, the asymmetric polygon QAM constellation diagram is simplified into a polygon constellation diagram; and compared to a conventional square or star-shaped constellation diagram, the polygon constellation diagram improves a distribution probability of low energy points of an input signal and enables an entire system to obtain high spectral efficiency and excellent transmission performance.

Description

technical field [0001] The invention belongs to the technical field of optical transmission, and in particular relates to a probabilistic shaping method based on asymmetric polygon modulation and bit-level ontology labels. Background technique [0002] With the wide application and development of big data, cloud computing, and virtual reality in social life, the data volume of Internet data centers is growing exponentially, and the data traffic of data centers accounts for an increasing proportion of the total data volume of the network. In the era of big data, in order to meet the requirements of low complexity, low power consumption, high communication capacity, high switching capacity, and high data processing capacity for short-distance optical interconnection ultra-high-speed communication systems, various communication systems and multiplexing Modulation interconnect technologies emerge in an endless stream. Pulse amplitude modulation (PSK), direct modulation and dire...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/34H04L27/36
CPCH04L27/3483H04L27/36
Inventor 刘博张丽佳毛雅亚徐星忻向军孙婷婷赵立龙吴泳锋刘少鹏宋真真王俊锋哈特姜蕾
Owner NANJING UNIV OF INFORMATION SCI & TECH
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