Generalized pairwise complex complementary (GPCC) codebook construction method and expansion method thereof

A construction method and complementary code technology, applied in the field of communication, can solve problems such as complex multiple access interference, achieve the effect of overcoming multiple access interference and realizing controllable interference

Active Publication Date: 2021-03-26
BEIJING UNIV OF POSTS & TELECOMM
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, although the internal generalized complementary code has a ZCZ area, which can eliminate multiple access interference to a certain extent, if the interference signal falls outside the ZCZ, it will still introduce complex multiple access interference problems.

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
  • Generalized pairwise complex complementary (GPCC) codebook construction method and expansion method thereof
  • Generalized pairwise complex complementary (GPCC) codebook construction method and expansion method thereof
  • Generalized pairwise complex complementary (GPCC) codebook construction method and expansion method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0044] In this embodiment, the GPCC code is composed of multiple pairs of complementary codes, and each complex code is divided into two parts, the same direction branch and the orthogonal branch; the autocorrelation function of any GPCC code, in the same direction branch and The orthogonal branches all exhibit the characteristics of the zero correlation zone, and the length of the zero correlation zone is expressed as W min =M, M is the number of GPCC code subcodes, because the autocorrelation function of the same direction branch and the orthogonal branch is perfectly complementary (y-axis symmetry), therefore, the GPCC code can also realize perfect autocorrelation characteristics; any pair of GPCC The intra-pair cross-correlation function of the code shows the characteristics of the zero-correlation zone in both the same-direction branch and the orthogonal branch, and the length of the zero-correlation zone is expressed as W min = M, similarly, because the internal cross-co...

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 generalized pairwise complex complementary (GPCC) codebook construction method and an expansion method thereof. The construction method comprises the steps: 1.1, setting a first matrix AM as an M-dimensional orthogonal Hadamard matrix; 1.2, separately expanding the dimension of the orthogonal matrix AM by utilizing the vectors [+ 1, + 1] and [+ 1, 1] to obtain an expandedorthogonal matrix; 1.3, setting a second matrix DN as an N*N orthogonal Hadamard matrix, setting N to be equal to 2M, and obtaining a pairing matrix EN according to the second matrix D; and 1.4, constructing a GPCC codebook according to the matrix and the EN. The expansion method comprises the step of expanding the GPCC code family. The GPCC code constructed by the construction method disclosed by the invention can realize perfect autocorrelation characteristics and perfect internal correlation characteristics, and shows perfect cross-correlation; according to the expansion method, the codebook capacity is expanded, and perfect correlation characteristics are achieved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a generalized pairwise complex complementary code GPCC (Generalized Pairwise Complex Complementary) codebook construction method and an extension method thereof. Background technique [0002] In order to improve the quality of service and meet the exponential growth of terminal requirements for new services and applications in the future, code-domain non-orthogonal multiple access (NOMA) is considered to be the most promising future wireless communication technology. One of the multiple access candidate access schemes, NOMA allows multiple users to share the same resource block transmission, therefore, it can significantly improve the spectrum efficiency and user capacity of the system. However, the poor direct correlation of traditional NOMA signature codes will cause complex multiple access interference at the receiving end. Therefore, designing a large number of signatu...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/00H04J13/10H04J13/14
CPCH04J13/0055H04J13/10H04J13/0011H04J13/14
Inventor 刘喜庆彭木根王志峰
Owner BEIJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap