Digital communication system based on hexadecimal three dimensional grid constellation graph mapping

A digital communication system, hexadecimal technology, applied in the field of digital communication, can solve problems such as poor error performance of digital communication systems, achieve the effect of improving system error performance and improving system error performance

Active Publication Date: 2017-08-11
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the commonly used hexadecimal three-dimensional signal constellation design methods are mostly based on the combination of various polyhedron structures or irregular structures. Due to their irregular spatial structures, the error performance of digital communication systems is not good, which is not conducive to combining some codes techniques to further improve the error performance of the system

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  • Digital communication system based on hexadecimal three dimensional grid constellation graph mapping
  • Digital communication system based on hexadecimal three dimensional grid constellation graph mapping
  • Digital communication system based on hexadecimal three dimensional grid constellation graph mapping

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Embodiment 1

[0040] Please refer to figure 1 and figure 2 , an embodiment of the present invention provides a digital communication system based on hexadecimal three-dimensional lattice constellation map mapping, comprising the following steps:

[0041] (1) Design a QPSK constellation diagram in the two-dimensional XY plane, expand and translate the QPSK constellation diagram to obtain a hexadecimal three-dimensional lattice constellation diagram, and the hexadecimal three-dimensional lattice constellation diagram is a regular lattice-shaped hexadecimal system A three-dimensional lattice constellation diagram or a hexadecimal three-dimensional lattice constellation diagram in the shape of a sub-regular lattice, and the hexadecimal three-dimensional lattice constellation diagrams all have a non-constant envelope structure;

[0042] Design a QPSK constellation diagram in the two-dimensional XY plane, set the distance between adjacent signal points as d, and the coordinates of the QPSK cons...

Embodiment 2

[0063] Please refer to figure 1 and image 3 , an embodiment of the present invention provides a digital communication system based on hexadecimal three-dimensional lattice constellation map mapping, comprising the following steps:

[0064] (1) Design a QPSK constellation diagram in the two-dimensional XY plane, expand and translate the QPSK constellation diagram to obtain a hexadecimal three-dimensional lattice constellation diagram, and the hexadecimal three-dimensional lattice constellation diagram is a regular lattice-shaped hexadecimal system A three-dimensional lattice constellation diagram or a hexadecimal three-dimensional lattice constellation diagram in the shape of a sub-regular lattice, and the hexadecimal three-dimensional lattice constellation diagrams all have a non-constant envelope structure;

[0065] Design a QPSK constellation diagram in the two-dimensional XY plane, set the distance between adjacent signal points as d, and the coordinates of the QPSK constel...

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Abstract

The invention discloses a digital communication system based on hexadecimal three dimensional grid constellation graph mapping. The method comprises the following steps of (1) designing a QPSK constellation graph in a two-dimensional plane, and expanding and translating the QPSK constellation graph to obtain a hexadecimal three-dimensional grid constellation graph; (2) inputting a binary bit stream generated by a source into a mapping processing module; (3) inputting an obtained three-dimensional signal to a modulator; (4) transmitting a modulated signal input channel; (5) inputting a signal via the channel to the demodulator of a receiver; and (6) inputting an output signal of the demodulator into a demapping processing module for processing and enabling the processed output signal to reach a sink. The constellation graph has the regular space structure, and the error performance of the digital communication system can be effectively improved.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a digital communication system based on hexadecimal three-dimensional lattice constellation map mapping. Background technique [0002] Three-dimensional signal constellations have been proven to enable reliable and efficient digital communications. In a digital communication system, a good signal mapper design can effectively and directly improve the error performance of the system. [0003] In traditional digital communication, mappers based on two-dimensional signal constellation diagrams are widely used, and many effective constellation diagrams have been designed and applied. Using the 3D signal constellation diagram, a signal mapper can be designed and the digital transmission of the signal can be realized. [0004] At present, the commonly used hexadecimal three-dimensional signal constellation design methods are mostly based on the combination of various polyhedron s...

Claims

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Application Information

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IPC IPC(8): H04L27/34
CPCH04L27/3444H04L27/3483
Inventor 陈振兴薛伟程卓罗林波张祥莉
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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