Capacity maximization-based sparse code multiple access codebook design method

A capacity-maximizing, sparse coding technology, applied in baseband systems, multi-carrier systems, baseband system components, etc., can solve the problem of high computational complexity, cannot well meet the business needs of the rapid growth of 5G systems, and cannot promote high-dimensional Codebook design and other issues

Active Publication Date: 2016-10-26
SHANGHAI JIAO TONG UNIV
View PDF2 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As one of the core technologies of the SCMA system, codebook design has attracted much attention in the industry. The existing methods cannot be extended to high-dimensional codebook design suitable for a large number of users due to their high computational complexity.
S...

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
  • Capacity maximization-based sparse code multiple access codebook design method
  • Capacity maximization-based sparse code multiple access codebook design method
  • Capacity maximization-based sparse code multiple access codebook design method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0063] According to the sparse coding multiple access codebook design method based on capacity maximization provided by the present invention, specifically, as image 3 As shown, in a regular SCMA system, each resource block is superimposed with d f users Each user is assigned a one-dimensional complex constellation where d=0,...,d f-1 ,Such as image 3 shown. The signal Y received on the resource block can be expressed as: in obbey normal distribution. According to the chain rule, the ach...

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 present invention provides a capacity maximization-based sparse code multiple access codebook design method. The method includes a first step of determining a codebook parameter S (J, K, F, M, N) of the sparse code multiple access (SCMA), wherein J represents a maximum quantity of users that the SCMA holds, F represents an SCMA mapping matrix generated based on resource blocks and users, K represents a quantity of the resource blocks, M represents a modulation order, and N represents a quantity of non-zero elements in each code word; a second step of constructing a one-dimensional constellation set S0, and calculating based on the one-dimensional constellation set S0 so as to obtain a one-dimensional complex constellation point set Sd; a third step of constructing an N-dimensional complex constellation set according to the one-dimensional complex constellation point set, and selecting an optimal combination sequence as a benchmark code word; and a fourth step of reranking code words of all users according to the benchmark code word, and allocating reranked code words to an indication matrix to generate an SCMA complex codebook. In design of a multi-user codebook, a superimposed coded modulation concept is introduced to improve system performance, and a power difference characteristic of an N-dimensional code word is maintained.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for designing a sparse coding multiple access codebook based on capacity maximization. Background technique [0002] With the rapid development of the mobile Internet and the Internet of Things (IOT), the next-generation wireless communication system (5G) will face rapidly expanding data services, and the capacity of the mobile communication system will face huge challenges. In order to meet the challenges of system performance such as high spectral efficiency, massive connections and low latency in 5G, Non-Orthogonal Multiple Access (NOMA) has been recognized by people and has been selected as the 5G medium-space solution. One of the candidate technologies. [0003] Sparse Code Multiple Access (SCMA), as a typical non-orthogonal multiple access method, has been proven to be a more effective multiple access method. In the SCMA encoding process, m...

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): H04L25/03H04L27/34
CPCH04L25/03898H04L27/3483
Inventor 肖可鑫张书天肖柏岑陈智勇夏斌
Owner SHANGHAI JIAO TONG UNIV
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