Generalized Electromagnetic Wave Orbital Angular Momentum Transmission System Based on Smart Reflector

A technology of orbital angular momentum and transmission system, which is applied in the field of generalized electromagnetic wave orbital angular momentum transmission system, can solve the problems of limited transmission distance of traditional OAM beams, high computational complexity at the receiving end of the system, etc., and achieve support for mobility and multi-user characteristics , Reduce computational complexity, low power consumption

Active Publication Date: 2022-06-03
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve to a certain extent the introduction of intelligent reflectors in the MIMO system described in the background will bring high computational complexity at the receiving end of the system, and the transmission distance of traditional OAM beams is limited, and long-distance transmission and reception require large-diameter antennas question

Method used

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  • Generalized Electromagnetic Wave Orbital Angular Momentum Transmission System Based on Smart Reflector
  • Generalized Electromagnetic Wave Orbital Angular Momentum Transmission System Based on Smart Reflector
  • Generalized Electromagnetic Wave Orbital Angular Momentum Transmission System Based on Smart Reflector

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Embodiment Construction

[0064] The generalized OAM beams are spatially structured beams that are mutually orthogonal to a certain extent. Without loss of generality,

[0066]

[0067] Wherein, N represents the number of arrays in the UCA array, 1 represents the number of OAM modes, and 0≤n≤N-1. Signal transmitting base station

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[0072] End User 103: To demodulate N

[0073] The link model of the downlink subsystem is described below. Assuming that all channels are Gaussian white noise channels, the

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[0096] wherein R represents the radius of the regular circle plane Φ. Therefore, the regular circular plane composed of the IRS array is uniquely determined.

[0098] If all IRSs are strictly on the regular circle plane Φ, the OAM carriers of different modes are mutually orthogonal. therefore,

[0099]

[0100] OAMs of different modalities are orthogonal to each other on the same carrier, regardless of the misalignment of OAM modal m...

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Abstract

The invention relates to a generalized electromagnetic wave orbital angular momentum transmission system based on an intelligent reflecting surface. The downlink in the system includes a signal transmitting base station, a first intelligent reflector array, and a terminal user. The signal transmitting base station generates a generalized OAM beam with a spatial phase gradient, and the beam is formed to reflect on the smart reflector; the smart reflector converges each generalized OAM beam to the location of the end user; the end user accumulates and demodulates the converged generalized OAM beam to recover data . The uplink in the system includes a signal transmitting user, a second intelligent reflector array, and a signal receiving base station. The signal transmitting user estimates the DOA of the downlink arrival beam, and uploads the user information to the intelligent transmitting surface according to the original path; the intelligent reflecting surface reflects the user information to the signal receiving base station according to the original path; the signal receiving base station demodulates or forwards the user information. The invention provides a rule and a criterion for switching from a super-large-scale MIMO mode to a generalized OAM, which not only ensures the user transmission capacity but also ensures the lowest power consumption of the user.

Description

Generalized electromagnetic wave orbital angular momentum transmission system based on intelligent reflector technical field Orbital angular momentum electromagnetic wave communication technical field of the present invention, particularly a kind of generalized electric Magnetic Orbital Angular Momentum Transfer System. Background technique Intelligent reflecting surface (Intelligent Reflecting Surface, IRS) is the candidate of the sixth generation mobile communication One of the hottest technologies. A smart reflective surface is a flat surface composed of a large number of low-cost passive passive reflective elements, placed in between the base station and the user. Since each element is capable of independently altering the phase or / and amplitude of the incident signal, Smart reflective surfaces can be used to enable users to better receive the signals sent by the base station. Very Large Scale Multiple Input Multiple Output The combination of Multiple Input ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/28
CPCH04W16/28Y02D30/70
Inventor 张超蒋金
Owner TSINGHUA UNIV
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