Check patentability & draft patents in minutes with Patsnap Eureka AI!

A 64-point scma codebook design method based on maximizing the minimum product distance criterion

A design method and distance technology, applied in baseband systems, baseband system components, and shaping networks in transmitters/receivers, etc., can solve the problems of high complexity and difficulty in SCMA codebook design, and achieve a high computational cost. Small size, simple operation, and the effect of ensuring the performance of the bit error rate

Active Publication Date: 2019-03-26
HARBIN INST OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of high complexity and difficulty in the design of SCMA codebooks, and propose a 64-point SCMA codebook design method based on maximizing the minimum product distance criterion with simple operation

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
  • A 64-point scma codebook design method based on maximizing the minimum product distance criterion
  • A 64-point scma codebook design method based on maximizing the minimum product distance criterion
  • A 64-point scma codebook design method based on maximizing the minimum product distance criterion

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0030] Specific embodiment one: a kind of 64-point SCMA codebook design method based on maximizing the minimum product distance criterion of this embodiment is specifically prepared according to the following steps:

[0031] Step 1. Select two identical standard 8PSK (eight-phase phase-shift keying) constellation diagrams, namely 8PSK1 and 8PSK2, and set the power of 8PSK1 and 8PSK2 to be a, that is, the distance from each constellation point to the origin in 8PSK1 and 8PSK2 The distance is a; two identical standard 8PSK constellation diagrams 8PSK1 and 8PSK2 are shown in Figure 1(a) and Figure 1(b); (standard 8PSK (visible in reference books) default power a is 1, here I also It is directly specified as 1, where the 8PSK coordinates will be directly related to the 64-point coordinates obtained later, because the 64-point coordinates are based on the 8PSK coordinates)

[0032] Among them, there are 8 constellation points in the standard 8PSK (eight-phase phase shift keying) co...

specific Embodiment approach 2

[0051] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the abscissa of the point in the SCMA constellation diagram of the first 64 points in the two corresponding 64-point SCMA constellation diagrams in step 3 is the first The first three bits B of the point in the 64-point SCMA constellation diagram 1 , B 2 and B 3 (B 1 B 2 B 3 Represents a point, such as 010) corresponding to the x1 axis coordinates in 8PSK1 as shown in Figure 2 (a); the ordinate of the point in the first 64-point SCMA constellation diagram is the point in the first 64-point SCMA constellation diagram last three bits B 4 , B 5 and B 6 The coordinates of the y1 axis corresponding to 8PSK2 are shown in Figure 2(b). Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0052] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the abscissa of the point in the second 64-point SCMA constellation diagram of the two corresponding 64-point SCMA constellation diagrams in step 3 is the first The first three bits B of the points in the two 64-point SCMA constellation diagrams 1 , B 2 and B 3 Corresponding to the x2 axis coordinates in 8PSK1 as shown in Figure 2(a); the ordinate of the point in the second 64-point SCMA constellation diagram is the last three bits B of the point in the second 64-point SCMA constellation diagram 4 , B 5 and B 6 The coordinates of the y2 axis corresponding to 8PSK2 are shown in Figure 2(b). Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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 64-point SCMA codebook design method based on a maximized minimum product distance criterion. The invention relates to the 64-point SCMA codebook design method. The 64-point SCMA codebook design method based on the maximized minimum product distance criterion provided by the invention is used for solving the problems that an SCMA system is high in codebook design complexity and difficulty; and the method is simple in operation. The method comprises following steps of firstly, selecting constellation diagrams 8PSK1 and 8PSK2; secondly, obtaining rotated constellation diagrams 8PSK1 and 8PSK2; thirdly, obtaining the location coordinate of each point in two corresponding 64-point SCMA constellation diagrams; fourthly, obtaining the minimum of a product distance Rij according to calculated Rij; fifthly, obtaining the minimums of all minimum product distances Rij; and sixthly, obtaining a pair of 64-point SCMA codebooks satisfying the maximized minimum product distance criterion. The method provided by the invention is applied in the field of 64-point SCMA codebook design.

Description

technical field [0001] The invention relates to a 64-point SCMA codebook design method, in particular to a 64-point SCMA codebook design method based on maximizing the minimum product distance criterion. Background technique [0002] Sparse code multiple access (SCMA) is a new type of non-orthogonal multiple access method. It is a high-speed transmission technology proposed by Huawei for high spectrum utilization efficiency. This air interface technology has been listed as a candidate for 5G mobile communication Compared with the traditional multiple access technology, it has the advantages of high capacity, small delay, fast transmission rate, strong anti-multipath ability, and overcomes the short-range effect of CDMA. Compared with the low-density signal (LDS), SCMA adds a codebook design to obtain a certain codebook gain, but at the same time, unlike the traditional single constellation point design, the SCMA system needs to use multiple resources The codebooks on multip...

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 Patents(China)
IPC IPC(8): H04L25/03H04L27/34
CPCH04L25/03898H04L27/3477H04L27/3483
Inventor 韩帅郭诚沙学军吴宣利张中兆
Owner HARBIN INST OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com