A method and system for calculating reflection coefficient of an intelligent metasurface
A technology of reflection coefficient and calculation method, applied in transmission systems, radio relay systems, radio transmission systems, etc., can solve the problems of unsatisfactory performance and high time complexity, and achieve excellent overall performance, strong universality, and high performance. good effect
Active Publication Date: 2022-02-18
HUAZHONG UNIV OF SCI & TECH
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[0007] In view of the above defects or improvement needs of the prior art, the present invention provides a method and system for calculating the reflection coefficient of an intelligent metasurface, thereby solving the problem of excessive time complexity or performance problems in the process of calculating the reflection coefficient of RIS in the prior art. Technical problems that cannot meet the requirements
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[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0048] The planar array model studied by the present invention is composed of M*N structural units, M is the number of rows of reflective units in the RIS array, and N is the number of columns of reflective units in the RIS array. Such as figure 2 As mentioned above, the antenna elements of the y-axis and the z-axis are evenly arranged, d y Indicates the spacing between antenna elements on th...
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The invention discloses a method and system for calculating the reflection coefficient of an intelligent metasurface, belonging to the technical field of wireless communication. The method includes: setting an initial reflection coefficient for each reflection unit and activating all reflection units on the RIS; each reflection unit is activated It can reflect the electromagnetic signal directed at it; group all the reflection units, change the reflection coefficient of each group of reflection units in turn, and fix the reflection coefficients of the rest of the reflection units, so that the RIS scans under the conditions of different reflection coefficients; by comparing Based on the data fed back by the user equipment (UE), an optimal reflection coefficient of each group of reflection units is determined, thereby obtaining a reflection coefficient matrix. In this way, the present invention can have relatively high accuracy under the premise of ensuring low time complexity; at the same time, by changing the reflection coefficient of the RIS reflection unit, the main beam of the reflected signal is directed to the user's direction, without moving the user's position.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and more specifically relates to a method and system for calculating a reflection coefficient of an intelligent metasurface. Background technique [0002] In the field of 5G wireless communication and even the field of 6G wireless communication in the future, millimeter wave technology plays an extremely important role as a key technology. However, millimeter wave has a very fatal flaw. not ideal. [0003] In order to solve this problem, the existing technology is to add a specially manufactured, low-cost, programmable intelligent metasurface (RIS / Large Intelligent Surface / Reconfigurable Intelligent Surface / Software Defined Surface / Metasurface / IRS / Intelligent Reflecting Surface / Reconfigurable Meta-Surfaces / Holographic MIMO, etc., hereinafter are all expressed in RIS) to assist communication. When there is a barrier between the AP (Access Point) or the base station (Base Station)...
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IPC IPC(8): H04B7/145H04B7/06
CPCH04B7/145H04B7/0695H04B7/04013
Inventor 尹海帆李展鹏
Owner HUAZHONG UNIV OF SCI & TECH