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Channel feedback method, information transmission method and equipment

A technology of channel feedback and channel state information, which is applied in the field of channel feedback method, information transmission method and equipment, and can solve the problems of unable to reflect channel channel estimation and feedback, etc.

Pending Publication Date: 2022-07-08
CHINA MOBILE COMM LTD RES INST +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a channel feedback method, information transmission method and equipment, which are used to solve the problem that the terminal cannot perform channel estimation and feedback on the reflected channel in the prior art

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  • Channel feedback method, information transmission method and equipment
  • Channel feedback method, information transmission method and equipment
  • Channel feedback method, information transmission method and equipment

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Embodiment Construction

[0167] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0168] Aiming at the problem that the terminal cannot perform channel estimation and feedback on the reflected channel in the prior art, the present invention provides a channel feedback method, a channel information acquisition method, a signal reflection method and equipment.

[0169] In order to make those skilled in the art better understand the method of the embodiment of the present invention, the following description is firstly made. like figure 1 As shown, it is a schematic diagram of the transmission model of the smart reflective surface. After the signal is reflected by the reflector 1, it is connected to the direct link h d Superimposed on the terminal side to form an equivalent channel.

[0170] The reflection coeffici...

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Abstract

The invention provides a channel feedback method, an information transmission method and equipment, and solves the problem that a terminal cannot perform channel estimation and feedback on a reflection channel in the prior art. The method provided by the invention comprises the following steps: receiving an I-type reference signal and an II-type reference signal, the I-type reference signal corresponding to an I-type codebook, and the II-type reference signal corresponding to an II-type codebook; based on the I-type reference signal, feeding back a codeword selected based on an I-type codebook and a corresponding codebook type; and based on the II-type reference signal, feeding back the code word selected based on the II-type codebook and the corresponding codebook type. According to the invention, the channel estimation and feedback of the reflection channel can be realized by introducing the II-type reference signal, so that the characteristics of the reflection channel can be accurately reflected, the base station can obtain accurate channel information, and an accurate basis is provided for the precoding calculation of the subsequent base station side during beamforming.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and in particular, to a channel feedback method, an information transmission method and equipment. Background technique [0002] The smart reflector is a new type of smart passive surface. Meta-materials are used to control the phase of the surface in real time, so as to control the reflection angle of incident waves and form reflected beams in different directions. The smart reflector has the characteristics of low cost and low power consumption, so it can realize the forwarding of signals without a complex radio frequency (Radio Frequency, RF) circuit. [0003] In the existing system, the terminal only estimates the channel from the base station to the terminal. Even in the integrated relay / access backhaul (IAB) system, the terminal estimates a separate relay-to-terminal channel. In the intelligent reflective surface system, the terminal can only estimate the channel aft...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04B7/06H04L25/02
CPCH04B7/0456H04B7/0617H04B7/0626H04B7/063H04L25/0224H04B7/06H04L25/02Y02D30/70H04B7/04013
Inventor 吴丹孙军帅金婧苏鑫王启星
Owner CHINA MOBILE COMM LTD RES INST
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