Channel covariance feedback for enhanced fd-mimo

A technology of spatial covariance and channel state information, applied in communication between multiple stations, sub-channel allocation of transmission paths, wireless communication, etc., can solve problems such as reducing downlink and uplink performance, etc.

Active Publication Date: 2019-02-05
QUALCOMM INC
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This interference can degrade performance on both the downlink and uplink

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
  • Channel covariance feedback for enhanced fd-mimo
  • Channel covariance feedback for enhanced fd-mimo
  • Channel covariance feedback for enhanced fd-mimo

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The detailed description set forth below in connection with the accompanying drawings is intended as a description of various possible configurations and is not intended to limit the scope of the present disclosure. Rather, the detailed description includes specific details for the purpose of providing a thorough understanding of the inventive subject matter. It will be apparent to those skilled in the art that these specific details are not required in every case, and in some instances, well-known structures and components are shown in block diagram form for clarity of presentation.

[0030] The present disclosure generally relates to providing or participating in authorized shared access between two or more wireless communication systems (also referred to as wireless communication networks). In various aspects, techniques and apparatus can be used in wireless communication networks, such as Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (...

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

Channel covariance feedback is disclosed for enhanced full-dimension multiple input, multiple output (eFD-MIMO) systems. Channel state information (CSI) reference signal (CSI-RS) feedback operations are implemented using spatial covariance feedback of a covariance estimate. After obtaining a set of orthogonal basis vectors, a user equipment (UE) measures the CSI-RS from a base station and determines the spatial covariance matrix from the signal. The UE may then compress the spatial covariance matrix into a lower-dimension covariance estimate matrix using the orthogonal basis vectors. The lower-dimension matrix along with element-wise quantization allows for feedback of spatial covariance for eFD-MIMO systems without excessive feedback overhead.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of PCT / CN2016 / 078179, filed March 31, 2016, entitled "CHANNEL COVARIANCE FEEDBACKFOR ENHANCED FD-MIMO", the entire contents of which are expressly incorporated herein by reference. technical field [0003] In general, aspects of the present disclosure relate to wireless communication systems, and in particular, to channel covariance feedback for enhanced full-dimensional multiple-input multiple-output (eFD-MIMO) systems. Background technique [0004] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and so on. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing available network resources. Such networks are typically multiple-access networks, which support communications for multiple users by sharing available network resources. On...

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): H04B7/06H04B7/26
CPCH04B7/0417H04B7/0626H04B7/063H04B7/0645H04B7/0413H04L5/0048H04W24/08H04W24/10
Inventor 陈波魏超武良明N·王
Owner QUALCOMM INC
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