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Joint optimization method for position and wave beam of intelligent reflecting surface carried on unmanned aerial vehicle

A joint optimization and reflection surface technology, applied in the field of millimeter-wave MIMO systems, can solve the problems of inapplicable millimeter-wave communication security transmission, CSI not completely known, etc., to achieve good adaptation, avoid information leakage, and improve performance

Active Publication Date: 2022-01-25
XIDIAN UNIV
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Problems solved by technology

However, this method is implemented under the assumption that the eavesdropping channel state information CSI is completely known. However, in actual situations, since the eavesdropper does not frequently send pilot signals to update the CSI, the CSI of the eavesdropping channel is not completely known. of
Therefore, this method cannot be applied to the safe transmission of the actual IRS-assisted millimeter wave communication

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  • Joint optimization method for position and wave beam of intelligent reflecting surface carried on unmanned aerial vehicle
  • Joint optimization method for position and wave beam of intelligent reflecting surface carried on unmanned aerial vehicle
  • Joint optimization method for position and wave beam of intelligent reflecting surface carried on unmanned aerial vehicle

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[0024] In order to better understand the above technical solution, a specific description is given below in conjunction with the accompanying drawings and specific implementation manners.

[0025] refer to figure 1 , the implementation steps of this example are as follows:

[0026] Step 1: Construct the millimeter-wave MIMO communication system model assisted by the intelligent reflector IRS carried by the UAV.

[0027] refer to figure 2 : The millimeter-wave MIMO communication system model constructed in this step, including a set of N e antenna eavesdroppers, one with N r The ground communication base station of the root antenna, a UAV equipped with M=M x × M y Intelligent reflective surface IRS of reflective elements and N legitimate users U 1 ,U 2 ,...,U k , each user has N k root antenna. Among them, the antennas of legitimate users, eavesdroppers, and ground communication base stations all use uniform linear array ULA, and the intelligent reflector IRS uses un...

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Abstract

The invention discloses a joint optimization method for the position and wave beam of an intelligent reflecting surface carried on an unmanned aerial vehicle. The method mainly solves the problems that in the prior art, the shielding effect caused by a building is not considered, and safe transmission cannot be carried out under the condition that eavesdropping channel state information is not completely known. According to the invention, aiming at an uplink of an intelligent reflecting surface assisted millimeter wave MIMO system carried on an unmanned aerial vehicle, indirect sight distance links from a legal user to an intelligent reflecting surface IRS and from the IRS to a base station are ensured by optimizing the position of the unmanned aerial vehicle, so that a shielding effect caused by a building is avoided; meanwhile, under the condition that eavesdropping channel state information is not completely known, the safety rate of an IRS-assisted millimeter wave MIMO safety communication system is maximized by jointly optimizing legal user transmitting end beam forming and a phase shift matrix of an intelligent reflecting surface IRS. The method improves the secure transmission performance of a communication system, and can be used for a millimeter wave MIMO system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a joint optimization method for the position and beam of an intelligent reflection surface, which can be used in a millimeter wave MIMO system. Background technique [0002] Millimeter wave can realize ultra-high-speed wireless data transmission by increasing the spectrum bandwidth, thus becoming a key technology in B5G communication technology. However, on the one hand, mmWave communication suffers serious performance loss due to its susceptibility to occlusion. To improve reliability, the traditional approach is to design effective relay schemes to establish indirect line-of-sight mmWave links to mitigate the effects of blocking. However, because the repeater is active, it consumes a lot of energy, and mostly operates in half-duplex mode, which reduces the spectrum efficiency. If the full-duplex relay technology is used, it will be affected by serious self-inte...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/126H04W4/40H04B7/0413H04B7/06H04B1/3822
CPCH04W12/126H04W4/40H04B7/0413H04B7/0626H04B1/3822Y02D30/70
Inventor 王超郭康曾心远
Owner XIDIAN UNIV
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