Fast data transmission protocol for auxiliary communication of intelligent reflecting surface

A data transmission protocol and auxiliary communication technology, applied in the field of fast data transmission protocols, can solve the problems of low receiving power and inability to send data at the receiving end, and achieve the effect of fast transmission

Active Publication Date: 2021-06-01
ZHEJIANG LAB +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the pilot overhead will also increase with the increase of N, and the fundamental reason is that in the process of channel estimation, different reflection coefficients are randomly configured, and the receiving power at the receiving end is too small, so the transmitting end can only Send pilot, unable to send data

Method used

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  • Fast data transmission protocol for auxiliary communication of intelligent reflecting surface
  • Fast data transmission protocol for auxiliary communication of intelligent reflecting surface
  • Fast data transmission protocol for auxiliary communication of intelligent reflecting surface

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Embodiment 2

[0065] Step 1: The base station has M antennas, the smart reflection surface has N reflection units, and a single user has an omnidirectional antenna. In this example, M=32 and N=256 are set, which are the same as those in Embodiment 1. The line-of-sight link channel between the user and the base station is modeled as:

[0066]

[0067] in is the arrival angle of the line-of-sight link signal at the base station, L d is the number of channel paths, is the steering vector, α i ,i=0,1,...,L d -1 indicates the corresponding path gain, Δ BS is the distance between the base station antenna elements normalized to the wavelength.

[0068] Model the channel between the smart reflector and the base station as a Rician channel:

[0069]

[0070] K 1 stands for H 1 The Rice factor, Represents the line-of-sight link component, which can be expressed as is the steering vector, θ AOA,1 represents the angle of arrival at the base station, θDOA,1 Denotes the departure ...

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Abstract

The invention discloses a fast data transmission protocol for auxiliary communication of an intelligent reflecting surface, and aims to solve the problem of huge pilot frequency overhead caused by the fact that complete channel information needs to be obtained when the optimal reflection coefficient of the existing intelligent reflecting surface is adjusted. According to the invention, the reflection coefficient enabling the expected power of the received signal to be maximum is calculated by using the incomplete channel information estimated by the receiving end, and the related reflection coefficient is configured during the next pilot frequency or data transmission, so that the effect of gradually increasing the instantaneous receiving power of the receiving end can be achieved. According to the invention, the transmitting end can start data communication as soon as possible, and the pilot frequency overhead is reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a fast data transmission protocol for communication aided by an intelligent reflecting surface. Background technique [0002] The intelligent reflective surface is a new type of artificial electromagnetic material, which is composed of a large number of reflective units with the same structure. From a microscopic point of view, the reflection coefficient (phase, amplitude) of each reflection unit can be artificially controlled to independently exert a controllable influence on the incident electromagnetic wave; from a macroscopic point of view, all reflection units can be controlled cooperatively to change the reflected beam The quantity, direction, degree of scattering, etc. [0003] The optimal reflection coefficient setting of the smart reflector needs to be designed based on the channel response between the transmitter-smart reflector-receiver, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/36H04B17/309H04B17/391H04B7/08
CPCH04W52/367H04B17/309H04B17/391H04B7/0854Y02D30/70
Inventor 党建李业伟朱永东郭荣斌张在琛吴亮
Owner ZHEJIANG LAB
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