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A method and device for acquiring channel state information

A channel state information and acquisition method technology, applied in the field of channel state information acquisition, can solve the problems of reducing the computational complexity of the PMI selection process, complex implementation, and inability to reuse.

Active Publication Date: 2020-07-03
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But there are following problems in the prior art: the first method can't reduce the computational complexity of PMI selection process to the greatest extent; Level codebook selection cannot reuse the first level codebook selection module, that is, the implementation is more complicated

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  • A method and device for acquiring channel state information
  • A method and device for acquiring channel state information
  • A method and device for acquiring channel state information

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Embodiment Construction

[0044] In the embodiment of the present invention, the terminal selects the first type of precoding codebook index PMI for each layer, and selects for each layer according to the first type of PMI and the second type of PMI set according to the preset criteria The optimal second-type PMI; the terminal selects the optimal first-type PMI for each layer according to the preset criteria according to the optimal second-type PMI and the first-type PMI set of each layer; the terminal selects the optimal first-type PMI from each layer according to the preset criteria Select the first-type PMI and the second-type PMI that best match the current channel from the best first-type PMI and the best second-type PMI, and assign the layers corresponding to the best-matching first-type PMI and second-type PMI The number is taken as the rank RI of the channel matrix.

[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings and specifi...

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Abstract

Disclosed is a channel state information acquisition method. The method comprises: selecting a first-type precoding matrix index (PMI) for each layer, and selecting the optimal second-type PMI for each layer according to the first-type PMI of each layer and a second-type PMI set and in accordance with a pre-set criterion; selecting the optimal first-type PMI for each layer according to the optimal second-type PMI of each layer and a first-type PMI set and in accordance with the pre-set criterion; and selecting a first-type PMI and a second-type PMI best matching a current channel from the optimal first-type PMI and the optimal second-type PMI of each layer in accordance with the pre-set criterion, and taking a layer number corresponding to the best matched first-type PMI and second-type PMI as a rank indicator (RI) of a channel matrix. Also disclosed at the same time are a channel state information acquisition apparatus and a storage medium.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for acquiring channel state information. Background technique [0002] The fourth-generation mobile communication system adopts Multi-Input Multi-Output (MIMO) technology to improve peak throughput, spectral efficiency and system capacity, especially closed-loop spatial multiplexing based on precoding codebooks can further improve system performance. The premise of closed-loop spatial multiplexing technology is that the transmitting end obtains accurate channel state information (Channel Sate Information, CSI), and selects the appropriate number of layers and precoding codebook to preprocess the transmitted signal according to the channel state information. In the Long Term Evolution (LTE) and Long Term Evolution Advanced (LTE-A) systems, the user equipment (User Equipment, UE) at the receiving end feeds back channel state information to the trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/0456
CPCH04B7/0478H04B7/0486H04B7/0639H04B7/06
Inventor 谢纪岭
Owner SANECHIPS TECH CO LTD