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

Codebook generation method, precoding matrix determination method and related device

A technology of precoding matrix and codebook, applied in the field of precoding matrix determination method and related device, and codebook generation method

Active Publication Date: 2017-05-03
DATANG MOBILE COMM EQUIP CO LTD
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no codebook design scheme for the case where the number of simultaneously transmitted data streams rank is greater than 1

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
  • Codebook generation method, precoding matrix determination method and related device
  • Codebook generation method, precoding matrix determination method and related device
  • Codebook generation method, precoding matrix determination method and related device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0210] Embodiment 1: The process of using a two-dimensional orthogonal group to determine a precoding matrix is ​​described below through a specific example.

[0211] Take rank equal to 8 as an example, based on figure 2 The two-dimensional orthogonal beam subgroup shown gives the following three design methods of the precoding matrix:

[0212] Suppose Y i '=Y i , and satisfy Y 1 =Y 2 , Y 3 =Y 4 , Y 5 =Y 6 , Y 7 =Y 8 , phase adjustment factor α 1 = α 3 = α 5 = α 7 = 1, α 2 = α 4 = α 6 = α 8 =-1. Four beam vectors need to be arbitrarily selected from the two-dimensional orthogonal beam subgroups, and the following three options are available

[0213] Option 1: Y 1 =X(:,1),Y 3 =X(:,2),Y 5 =X(:,3),Y 7 =X(:,4), such as Figure 5 As shown in , the shaded square is the selected beam vector;

[0214] Option two: Y 1 =X(:,1),Y 3 =X(:,3),Y 5 =X(:,5),Y 7 =X(:,7), such as Figure 6 As shown in , the shaded square is the selected beam vector;

[0215] Optio...

Embodiment 2

[0216] Embodiment 2: The process of using two two-dimensional orthogonal subgroups to determine a precoding matrix is ​​described below through a specific example.

[0217] Take rank equal to 4 as an example, based on Figure 8 As shown, the first two-dimensional orthogonal beam subgroup adopts s 1 =0,s 2 = 0, expressed as

[0218]

[0219] define N p1 = 1, the second two-dimensional orthogonal beam subgroup uses s 1 = 1, s 2 = 0, expressed as

[0220]

[0221] The first-level codebook in the two-level codebook structure is: Among them, Z 1 =[X (0,0) x (1,0) ],Z 1 is a matrix with 16 columns.

[0222] For the second-level codebook selection adjustment factor α 1 = α 3 = 1, α 2 = α 4 =-1. A feasible way is to arbitrarily select two beam vectors from each two-dimensional orthogonal beam subgroup, and one implementation of the second-level codebook is:

[0223] Among them, e i is a unit vector of length 16 whose ith element is 1 and the rest are 0.

[...

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 codebook generation method, a precoding matrix determination method and a related device, so as to provide a codebook design scheme for conditions in which the simultaneously-transmitted data stream number rank is larger than 1. The method comprises steps: first dimension beam vectors and second dimension beam vectors are grouped respectively to obtain multiple first dimension beam subgroups and multiple second dimension beam subgroups, wherein multiple beam vectors in the first dimension beam subgroups or the second dimension beam subgroups are mutually orthogonal; according to the Kronecker product between each first dimension beam subgroup and each second dimension beam subgroup, multiple two-dimension orthogonal beam subgroups are determined; according to the simultaneously-transmitted data stream number, a beam vector is selected from one or multiple two-dimension orthogonal beam subgroups, and according to the selected beam vector and the data stream number, a precoding matrix corresponding to the two-dimension orthogonal beam subgroup is generated; and a precoding matrix set corresponding to all or partial two-dimension orthogonal beam subgroups is determined to be the codebook corresponding to the data stream number.

Description

[0001] This application claims the priority of a Chinese patent application filed with the China Patent Office on October 21, 2015, entitled "Codebook Generation Method, Precoding Matrix Determination Method, and Related Devices", the entire contents of which are incorporated by reference in this application middle. technical field [0002] The present invention relates to the field of communication technology, in particular to a method for generating a codebook, a method for determining a precoding matrix and related devices. Background technique [0003] In a multi-antenna system, the transmitter can simultaneously transmit multiple data streams to the receiver, and the number of simultaneously transmitted data streams is called rank. For different ranks, different codebooks need to be designed. [0004] Currently, in a Long Term Evolution (LTE) system, a base station (eNB) is allowed to transmit up to 8 data streams at the same time, that is, the maximum value of rank is...

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): H04B7/0456
CPCH04B7/0408H04B7/0456
Inventor 李辉高秋彬陈润华拉盖施陈文洪
Owner DATANG MOBILE COMM EQUIP CO LTD
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