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Independent sub-band size for precoding matrix indicator and channel quality indicator

A technology of channel quality indication and matrix indication, applied in wireless communication, diversity/multi-antenna system, spatial transmit diversity and other directions, can solve the problem of increasing CSI feedback overhead UE precoder search complexity, etc., and achieve the effect of improving PMI granularity

Pending Publication Date: 2021-08-20
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Type II precoder scheme may lead to better MU-MIMO performance, but at the cost of increased CSI feedback overhead and UE precoder search complexity

Method used

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  • Independent sub-band size for precoding matrix indicator and channel quality indicator
  • Independent sub-band size for precoding matrix indicator and channel quality indicator
  • Independent sub-band size for precoding matrix indicator and channel quality indicator

Examples

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Embodiment Construction

[0144] Generally, all terms used herein should be interpreted according to their ordinary meanings in the relevant technical field, unless a different meaning is explicitly given and / or implied from the context of its use. Unless expressly stated otherwise, all references to an / an / the element, means, component, part, step, etc. shall be construed publicly as referring to at least one instance of the element, means, component, part, step, etc. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless one step is explicitly described as being after or before another step and / or where it is implied that one step must be after or before another step. Any feature of any embodiment disclosed herein can be applied to any other embodiment, where appropriate. Likewise, any advantage of any embodiment can be applied to any other embodiment, and vice versa. Other objects, features and advantages of the appended embodiments will be apparent...

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PUM

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Abstract

A method performed by a wireless device (510, 700, 1100) is disclosed. The wireless device obtains (601) a configuration for a sub-band channel quality indicator (CQI) granularity and a sub-band precoding matrix indicator (PMI) granularity for the wireless device. The wireless device determines (602) channel state information (CSI) feedback according to the configured sub-band CQI granularity and the sub-band PMI granularity. The sub-band PMI granularity corresponds to a first sub-band size and the sub-band CQI granularity corresponds to a second sub-band size. The first sub-band size is smaller than the second sub-band size. The wireless device transmits (603), to a network node (560, 1000), the determined CSI feedback.

Description

technical field [0001] The present disclosure relates generally to wireless communications, and more particularly to independent subband sizes for precoding matrix indications and channel quality indications. Background technique [0002] Multi-antenna technology can significantly increase the data rate and reliability of wireless communication systems. Equipping multiple antennas at both the transmitter and receiver results in a multiple-input multiple-output (MIMO) communication channel with improved performance. Such systems and / or related technologies are commonly referred to as MIMO. [0003] New Radio (NR) standards are currently being developed with enhanced MIMO support. A core component in NR is support for MIMO antenna deployment and MIMO-related techniques such as spatial multiplexing. Spatial multiplexing modes are designed to achieve high data rates under favorable channel conditions. [0004] figure 1 A transmission structure 100 showing precoded spatial m...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04W72/04
CPCH04B7/0632H04B7/0639H04B7/0634
Inventor N·维尔纳松S·法克斯埃尔M·吉尔克
Owner TELEFON AB LM ERICSSON (PUBL)
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