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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
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  • Abstract
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  • Claims
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Problems solved by technology

This interference can degrade performance on both the downlink and uplink

Method used

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

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[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 (...

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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...

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Application Information

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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
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