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Multibeam precoder based channel state information

A channel state information and precoder technology, applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., can solve problems such as mutual interference, and achieve the effect of reducing overhead

Pending Publication Date: 2022-01-04
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this comes at the expense of reducing the signal-to-interference-plus-noise ratio (SINR) per stream, since power must be shared between the streams, and the streams will cause mutual interference

Method used

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  • Multibeam precoder based channel state information
  • Multibeam precoder based channel state information
  • Multibeam precoder based channel state information

Examples

Experimental program
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Embodiment Construction

[0107] Some of the aspects contemplated herein will now be described more fully with reference to the accompanying drawings. However, other examples are included within the scope of the herein disclosed subject matter, and the disclosed subject matter should not be construed as limited to only the aspects set forth herein; rather, these aspects are provided by way of example to inform those skilled in the art Communicate the scope of the topic.

[0108] As mentioned above, in 3GPP NR, the PMI content is split into two separately coded CSI parts (CSI part 1 and CSI part 2), where the CSI part 1 payload is fixed and the CSI part 2 payload is flexible and depends on CSI Part 1. In order to know the payload size of CSI part 2, gNB needs to decode CSI part 1. In the codebook, the wideband amplitude coefficient Both non-zero and zero values ​​may be used. For a certain beam i, In the case of , the corresponding subband (for all subbands) phase coefficients (as by c l,i ind...

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PUM

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Abstract

A method (1400) performed by a wireless device (200) for multibeam precoder based channel state information, CSI, feedback reporting is provided, A CSI report comprises a first part, CSI Part 1, and a second part, CSI Part 2. The method (1400) comprises generating (1401) the CSI report, wherein the CSI Part 1 comprises an indication of a number of non-zero coefficients, and a payload size of the indication of the number of non-zero coefficients is dependent on a rank restriction of the wireless device. The method also comprising transmitting (1402) the CSI report to a network node, wherein one or more of a payload of the CSI Part 2 and a payload size of the CSI Part 2 is based on the number of non-zero coefficients indicated in the CSI Part 1.

Description

technical field [0001] Embodiments herein relate generally to base stations and methods in base stations, and to user equipment (UE) and methods in user equipment. More particularly, embodiments herein relate to channel state information (CSI) feedback based on multi-beam or multi-layer precoders. Background technique [0002] Generally, all terms used herein are to be interpreted according to their ordinary meaning in the relevant technical field, unless a different meaning is explicitly given and / or implied from the context in which it is used. Unless expressly stated otherwise, all references to a (a / an) / the (the) element, device, component, part, step, etc. are to be construed open-ended as referring to that element, device, component, part , step, etc. at least one instance. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless a step is explicitly described as following or prior to another step, and / or where it is i...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0478H04B7/0663H04B7/0626H04B7/063H04B7/0417H04B7/0486
Inventor S·费克
Owner TELEFON AB LM ERICSSON (PUBL)