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Quadrature reflection index modulation method of intelligent reflection surface auxiliary wireless communication system

A wireless communication system and reflective surface technology, applied in the field of orthogonal reflective index modulation, can solve problems such as energy loss, achieve accurate information transmission, improve information transmission efficiency, and improve spectrum efficiency

Active Publication Date: 2021-01-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can transmit a certain bit of information, from the perspective of energy consumption, when the single element unit of the smart reflective surface is in the off state, it will inevitably cause energy loss.

Method used

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  • Quadrature reflection index modulation method of intelligent reflection surface auxiliary wireless communication system
  • Quadrature reflection index modulation method of intelligent reflection surface auxiliary wireless communication system
  • Quadrature reflection index modulation method of intelligent reflection surface auxiliary wireless communication system

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Embodiment

[0045] See figure 1 , figure 1 It is a model diagram of a single-input multiple-output wireless communication system assisted by a downlink intelligent reflective surface in an embodiment of the present invention. Such as figure 1As shown, the application scenario of the present invention includes a base station, a smart reflective surface using example grouping and multiple receiving antennas. In order to briefly explain the principle of the invention, it is assumed that the communication link between the base station and the destination is blocked, and the Information transmission via smart reflective surfaces.

[0046] In this embodiment, the smart reflective surface is deployed near the base station and is approximately regarded as a part of the base station. The smart reflective surface can sense channel information through its own sensors and perform information interaction and phase control with the base station through a control link. The intelligent reflective surf...

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Abstract

The invention discloses a quadrature reflection index modulation method of an intelligent reflection surface auxiliary wireless communication system. The quadrature reflection index modulation methodcomprises the following steps: S1, carrying out quadrature reflection modulation on information by grouping element units of an intelligent reflection surface; S2, establishing index modulation with the receiving antenna serial number as an index resource; S3, determining the optimal reflection phase shift of each group of elements of the intelligent reflection surface; S4, selecting an orthogonalscheme of the two paths of signals after orthogonal reflection index modulation; and S5, demodulating the sent information at a receiving end. According to the operation of grouping the intelligent reflection surface element units, a certain bit of information can be additionally transmitted; wherein an orthogonal scheme of index modulation taking the receiving antenna serial number as an index resource and selecting two paths of modulated signals is established, so that the bit error rate of the system can be reduced under the condition of relatively low signal-to-noise ratio, and thus the spectral efficiency of the communication system is improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an orthogonal reflection index modulation method of an intelligent reflection surface assisted wireless communication system. Background technique [0002] Since 2020, the first commercial fifth-generation (5G) wireless network has been partially or fully deployed in some countries, and 5G-compatible related equipment is gradually entering the market, although the initial 5G standard completed in 2018 uses mm Wave and multiple OFDM digital technologies bring greater flexibility to the physical layer, but researchers have already begun exploring the potential of alternative technologies in subsequent versions of 5G. [0003] Information transmission via smart reflective surfaces is a promising candidate for future wireless communication systems. Smart reflective surfaces can intelligently control the reflection or scattering characteristics of incident waves, thus ...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B17/336
CPCH04L27/2688H04B17/336
Inventor 温淼文齐晓敏林少娥袁婧
Owner SOUTH CHINA UNIV OF TECH
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