Unlock instant, AI-driven research and patent intelligence for your innovation.

Quasi co-location for beamforming

A filter and user equipment technology, applied in the directions of multiple use of transmission paths, space transmit diversity, channel estimation, etc., can solve the problem of lack of ability to consider multi-antenna transmission, and achieve the effect of improving channel estimation

Active Publication Date: 2019-05-24
TELEFON AB LM ERICSSON (PUBL)
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the QCL parameters for LTE only involve scalar entities that cannot be directly used for multidimensional spatial receiver processing
[0016] The current QCL framework in LTE is designed for single-input and single-output channels, and lacks the ability to consider multi-antenna transmission, especially for a large number of transmit and receive antennas

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
  • Quasi co-location for beamforming
  • Quasi co-location for beamforming
  • Quasi co-location for beamforming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] As mentioned above, in LTE and NR, quasi-co-location (QCL) information relates to scalar entities (also called attributes) but not to spatial (eg multi-dimensional) attributes. Therefore, the UE cannot use this QCL information for multi-dimensional spatial receiver processing. The present disclosure contemplates an unconventional QCL framework including QCL parameters that depend on spatial channel properties. The network may instruct the UE to use these channel parameters dependent on the spatial properties to improve reception and / or processing of the second signal. In this way, the UE is able to perform spatial processing across different signal types without violating rules that do not allow UEs to use measurements from one reference signal to assist in receiving or processing another signal unless explicitly stated otherwise. For example, the UE can perform analog receiver beamforming and channel estimation using spatial processing gain to improve channel estimati...

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

A method implemented in a user equipment (UE) includes the steps of: receiving a first reference signal (RS) from a first transmit antenna port and performing channel estimation based on the first RS.The method also includes obtaining an indication that the first RS and a second RS share a spatial property and receiving the second RS from a second transmit antenna port. The method further includes inferring the shared spatial property for the second RS based on the indication and performing channel estimation based on the second RS using the inferred spatial property.

Description

technical field [0001] The present disclosure relates generally to wireless communications, and more particularly to quasi-co-location frameworks. Background technique [0002] One of the principles guiding the design of the Long Term Evolution (LTE) system is the transparency of the network to the User Equipment (UE). For example, a UE is able to demodulate and decode its intended channel without specific knowledge of scheduling assignments for other UEs or network deployments. [0003] For example, different downlink control information (DCI) messages on an enhanced physical downlink control channel (ePDCCH) may be sent from ports belonging to different transmission points. Although there are several reasons for providing UE with control signaling from different points, one application consists of distributing parts of the scheduling algorithm at different points so that for example downlink (DL) transmissions are different from uplink (UL) transmissions points are assoc...

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): H04B7/06H04L5/00H04L25/02
CPCH04B7/0617H04L5/0048H04L25/0228H04L5/0023H04L5/0091H04L25/0204H04B17/327H04B7/0854
Inventor S·伯格曼S·索伦蒂诺G·约恩格伦M·弗伦内
Owner TELEFON AB LM ERICSSON (PUBL)