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Optical probabilistic shaping coding method based on star-shaped 24qam mapping

A coding method and probabilistic technology, applied in the field of optical probabilistic shaping coding, can solve the problems of increasing transmission power redundancy, reducing transmission rate and channel capacity, and low space utilization of constellation diagrams, so as to improve nonlinear tolerance and increase channel Effects on capacity and transfer performance

Active Publication Date: 2021-04-13
NANJING UNIV OF INFORMATION SCI & TECH
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  • Application Information

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Problems solved by technology

The space utilization rate of the conventional constellation diagram is low, and the space gap is too large under the same Euclidean distance, which will limit the system performance, increase the transmission power redundancy, and reduce the transmission rate and channel capacity

Method used

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  • Optical probabilistic shaping coding method based on star-shaped 24qam mapping
  • Optical probabilistic shaping coding method based on star-shaped 24qam mapping
  • Optical probabilistic shaping coding method based on star-shaped 24qam mapping

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Embodiment Construction

[0036] The present invention will be further described in detail through the following examples in conjunction with the accompanying drawings. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0037] like figure 1 As shown, the optical probability shaping coding method based on star 24QAM mapping of the present invention,

[0038] When the signal is input, the serial-to-parallel conversion is performed first, and then through the probability matcher. The probability matcher is mainly divided into two parts. The first part is to map the input signal into a star 32QAM signal, and the second part is through the probability matcher. The way to map the star 32QAM signal into a star 24QAM.

[0039] The conventional 32QAM constellation diagram is square, and the mapping method is as follows figure 2 shown. First map to star 32QAM constellation through the probability matcher, the star 32QAM mappi...

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Abstract

The invention discloses an optical probabilistic shaping encoding method based on star-shaped 24QAM mapping. After the signal is input, it first performs serial-to-parallel conversion, and the input signal is mapped to a star-shaped 32QAM signal through a probability matching device. The type 32QAM signal is mapped into a star type 24QAM, and the shaped signal is output and constellation mapped. The invention increases the channel capacity and transmission performance of the system.

Description

technical field [0001] The invention relates to an optical probability shaping encoding method, in particular to an optical probability shaping encoding method based on star-shaped 24QAM mapping. Background technique [0002] The access network refers to all the equipment between the user terminal and the backbone network, and its length varies from several hundred meters to several kilometers, so it is often called "the last mile". When a user uploads or downloads data, the signal needs to pass through the backbone network and the access network. Since the transmission medium in the backbone network is generally optical fiber, the transmission speed is fast and the transmission capacity is large, so the access network becomes a short board for data transmission. Therefore, the signal transmission speed and signal quality of the access network directly affect the intuitive experience of each user. With the development of society, people's spiritual and civilized life and en...

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Application Information

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IPC IPC(8): H04B10/54H04L27/34
CPCH04B10/541H04L27/3411
Inventor 刘博张丽佳毛雅亚韩顺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