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Active intelligent reflection surface auxiliary communication system

A reflective surface, auxiliary communication technology, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve the problems of increased energy consumption cost, weak reflection ability, large path loss, etc., to achieve simple implementation and strong application Value, the effect of improving spectrum utilization efficiency

Active Publication Date: 2020-07-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Traditional intelligent reflective surface communication systems need to configure large-scale passive reflective units to solve problems such as weak reflection ability and large path loss, resulting in a significant increase in circuit costs, space costs, and energy consumption costs

Method used

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  • Active intelligent reflection surface auxiliary communication system
  • Active intelligent reflection surface auxiliary communication system
  • Active intelligent reflection surface auxiliary communication system

Examples

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Embodiment Construction

[0028] The present invention is described in detail below in conjunction with accompanying drawing and embodiment:

[0029] Take an active intelligent reflective surface assisted single-input multiple-output wireless communication system as an example. Such as figure 1 As shown, the present invention considers the situation that M (M≥1) reflective units based on negative impedance are deployed on the active smart reflective surface device, and N (N≥1) receiving antennas are deployed on the receiver device. Assume that the transmitter transmits the signal s(n) as a signal with zero mean and variance of 1, and the transmit power is p t . The receiver signal y(n) can be expressed as follows

[0030]

[0031] in, Indicates the direct link channel from the sender to the receiver, Indicates the channel from the transmitter to the smart reflective surface device, Indicates the channel from the smart reflective surface device to the receiver, the above two together constit...

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Abstract

The invention belongs to the technical field of wireless communication, and particularly relates to an active intelligent reflection surface auxiliary communication system. According to the invention,an active intelligent reflection surface is introduced into the design of a wireless communication system to assist original signal transmission, so that the spectral efficiency and the energy efficiency of the wireless communication system are further improved. Specifically, in the active intelligent reflection surface, each independent reflection unit can utilize an active circuit to realize anegative impedance characteristic, phase adjustment is performed on an incident signal to enable multiple paths of reflection signals to be mutually enhanced or offset at a receiver, and meanwhile, amplitude amplification is performed on the incident signal to enable a signal transmission distance to be enhanced. In order to achieve the purpose, the reflection coefficient of a reflection unit of the active intelligent reflection surface needs to be optimized, and meanwhile a receiver needs to optimize a receiving beam forming vector of the active intelligent reflection surface. The scheme of the method is simple to implement, it can be proved that the spectrum efficiency higher than that of allocating special communication resources to respective systems can be achieved, and the method hasvery high application value.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an active intelligent reflective surface auxiliary communication system. Background technique [0002] With the explosive development of the mobile Internet and the Internet of Things, the future communication network is faced with the major challenges of huge traffic and huge connections brought about by the continuous growth of equipment. In particular, under the new vision of 6G, the communication network needs to realize Tbps-level ultra-huge traffic communication and super-giant connection communication supporting dozens of terminals per square meter. New transmission technologies with high spectral efficiency and high energy efficiency are urgently needed. [0003] In recent years, smart reflective surfaces can deploy multiple reflective units to intelligently reprogram wireless channels, thereby improving the transmission quality of signals. Be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08
CPCH04B7/086H04B7/0857Y02D30/70
Inventor 梁应敞龙睿哲
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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