Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Construction method of multi-dimensional constellation graph, and method and system for code modulation and demodulation and decoding

A construction method and coding and modulation technology, applied in the field of digital information transmission, can solve problems such as complex construction of multi-dimensional Gaussian-like constellations, inability to meet low spectral efficiency, and diversity order restrictions

Active Publication Date: 2011-11-16
TSINGHUA UNIV
View PDF3 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the defects of the existing BICM-ID technology are as follows: the multi-dimensional Gaussian-like constellation diagram is complex in construction; it cannot meet the requirements of low spectral efficiency; the constellation point mapping method is limited; the diversity order is limited by the output symbols; Shaping loss is large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Construction method of multi-dimensional constellation graph, and method and system for code modulation and demodulation and decoding
  • Construction method of multi-dimensional constellation graph, and method and system for code modulation and demodulation and decoding
  • Construction method of multi-dimensional constellation graph, and method and system for code modulation and demodulation and decoding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] Embodiment 1 Constructs a 256-point four-dimensional Gaussian-like constellation diagram from a two-dimensional 16APSK constellation diagram:

[0120] This embodiment proposes a method for constructing a 256-point four-dimensional Gaussian-like constellation diagram according to an embodiment of the present invention, the steps of which include:

[0121] A1. Select a two-dimensional 16APSK constellation diagram, such as Image 6 shown.

[0122] The set of all constellation points of the two-dimensional 16APSK constellation diagram is specifically χ 16APSK ={X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8 , X 9 , X 10 , X 11 , X 12 , X 13 , X 14 , X 15 , X 16},in

[0123] x 1 =(x 1 ,y 1 ) = (0.7660, 0.3173) X 2 =(x 2 ,y 2 ) = (-0.3173, 0.7660)

[0124] x 3 =(x 3 ,y 3 ) = (-0.3173, 0.7660) X 4 =(x 4 ,y 4 ) = (-0.7660, 0.3173)

[0125] x 5 =(x 5 ,y 5 ) = (-0.7660, -0.3173) X 6 =(x 6 ,y 6 ) = (-0.3173, -0.7660)

[0126] x 7 =(x 7 ,y 7...

Embodiment 2

[0144] Embodiment 2 constructs 512-point three-dimensional Gaussian-like constellation diagrams from two-dimensional 8APSK constellation diagrams:

[0145] This embodiment proposes a method for constructing a 512-point three-dimensional Gaussian-like constellation diagram according to an embodiment of the present invention, the steps of which include:

[0146] B1. Select a two-dimensional 8APSK constellation diagram, such as Figure 9 shown.

[0147] The set of all constellation points of the two-dimensional 8APSK constellation diagram is specifically χ 8APSK ={X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8},in

[0148] x 1 =(x 1 ,y 1 ) = (0.5863, 0.5863) X 2 =(x 2 ,y 2 ) = (-0.5863, 0.5863)

[0149] x 3 =(x 3 ,y 3 ) = (-0.5863, -0.5863) X 4 =(x 4 ,y 4 ) = (0.5863, -0.5863)

[0150] x 5 =(x 5 ,y 5 ) = (0.0000, 1.8200) X 6 =(x 6 ,y 6 ) = (-1.8200, 0.0000)

[0151] x 7 =(x 7 ,y 7 ) = (0.0000, -1.8200) X 8 =(x 8 ,y 8 ) = (1.8200, 0.0000)

[01...

Embodiment 3

[0163] Embodiment 3 adopts the BICM-ID method and system of the multidimensional Gaussian-like constellation diagram:

[0164] This embodiment proposes a BICM-ID method using a multi-dimensional Gaussian-like constellation diagram according to an implementation manner of the present invention. In order to enable the BICM-ID system to provide performance close to Shannon’s limit in AWGN and fading channels at the same time with medium and low spectral efficiency, this embodiment proposes to use a multi-dimensional Gaussian-like constellation in the BICM-1D coded modulation system, and combine the signal Space diversity (SSD) technology, including constellation rotation technology and coordinate interleaving technology.

[0165] The coding and modulation method of the transmitting end of the BICM-ID system includes steps:

[0166] C01. Perform channel coding and bit interleaving on the input information bits to obtain coded and interleaved bits, which are called coded interleav...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a construction method of a multi-dimensional constellation graph, and a code modulation system and a demodulation and decoding system based on the multi-dimensional constellation graph. The multi-dimensional constellation graph is a K-dimensional constellation graph, and the construction method comprises the following steps of: taking M points of a K0-dimensional constellation graph, wherein K0 is less than K; expanding dimensions of the K0-dimensional constellation graph to get a K0L-dimensional constellation graph; performing constellation rotation on the K0L-dimensional constellation graph to get a K0L-dimensional rotated constellation graph; and obtaining the K-dimensional constellation graph from the K0L-dimensional constellation graph. The construction method provided by the invention is simple; the system using the multi-dimensional constellation graph can significantly reduce Shaping loss and improve diversity order of the system so as to obtain diversity gain in a fading channel; and overall performance of a receiving end using the construction method can approach the channel capacity in both low and middle spectrum efficiency and various channel conditions.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a method for constructing a multi-dimensional constellation diagram and an encoding and modulation system and a demodulation and decoding system based on the constellation diagram. Background technique [0002] Constellation mapping is a digital modulation technique. The process of constellation mapping is to map the finite field "bit" sequence carrying digital information into a "symbol" sequence suitable for transmission. The value space of each symbol can be a one-dimensional real number space, a two-dimensional real number space (ie complex number space), or a higher-dimensional real number space. Constellation mapping includes two elements, namely constellation diagram (Constellation) and constellation point mapping method (Labeling). The constellation diagram represents a set of all values ​​of the output symbols of the constellation map, wherein ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04L1/00H04L27/34
Inventor 彭克武程涛杨昉宋健阳辉
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com