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High-dimensional modulation mapping method based on subset selection

A technique of subset selection and modulation mapping, applied in the field of communication, to achieve good system bit error performance and low operation complexity

Active Publication Date: 2019-08-09
JILIN UNIV
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Problems solved by technology

[0003] Aiming at the problem that fast high-dimensional modulation mapping cannot be realized in the prior art, the present invention provides a high-dimensional mapping and demapping method based on subset selection. Compared with the prior art, the mapping storage space of this method is independent of constellation points Set scale, low operation complexity, while ensuring better system bit error performance

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Embodiment Construction

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

[0034] The effectiveness of the modulation mapping method proposed by the present invention is tested by using a four-dimensional modulation system. figure 1 A schematic structural diagram of the four-dimensional modulation system adopted in the present invention is shown. It includes: pseudo-random bit data stream generation module 1, serial-to-parallel conversion and parallel-to-serial converter 2, four-dimensional mapping and demapping module 3, four-dimensional modulation module 4, standard single-mode optical fiber transmission link module (80km single-mode optical fiber, erbium-doped Optical fiber amplifier (EDFA)) 5, coherent detector 6, output module 7.

[0035] figure 1 The pseudo-random bit data stream generation module in the method generates a binary bit stream, which is converted into a p-order binary electrical signal through a serial-to-parallel conver...

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Abstract

The invention discloses a high-dimensional modulation mapping method based on subset selection, and belongs to the technical field of communication. The method comprises the following steps of firstly, taking a minimum Euclidean distance between constellation points as a constraint condition, and obtaining K high-dimensional constellation subsets with hypercube structures from a two-dimensional constellation set in a partition and diversity constellation point combination manner; then, dividing the bit tags obtained by serial-parallel conversion of the bit data flow into two parts, wherein onepart of the bit tags is used for the subset selection of a high-dimensional constellation point set, and the other part of the bit tags finally obtains a high-dimensional target coordinate vector through the arithmetic operation between the binary bits. According to the present invention, a subset selection method is adopted to realize a rapid high-dimensional mapping technology, the mapping storage space of the method is independent of the scale of the constellation point set, so that the method has the characteristics of low operation complexity and excellent system error code performance,and a better high-dimensional modulation mapping effect can be achieved.

Description

technical field [0001] The invention belongs to the field of communication technology, and in particular relates to a mapping method of high-dimensional modulation technology, which adopts a subset selection method to realize fast mapping of high-dimensional modulation. Background technique [0002] With the wide application of coherent optical transmission systems, people's desire for high-speed, large-capacity optical fiber transmission systems is getting higher and higher. Optimizing the modulation technology is the best solution to increase the system capacity without increasing the reconstruction cost of the trunk line. Traditional modulation techniques usually use higher-order modulation formats with high spectral efficiency to increase transmission capacity. But as the spectral efficiency increases, the asymptotic power efficiency of the modulation format also decreases. Therefore, in order to solve the contradiction between spectral efficiency and asymptotic power ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/516H04L27/36
CPCH04B10/516H04L27/36
Inventor 胡贵军李娇
Owner JILIN UNIV
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