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Downlink multi-user beam alignment and data transmission method for millimeter wave covert communication

A covert communication and millimeter wave technology, applied in the transmission system, wireless communication, radio transmission system, etc., can solve the problems of increasing the detection probability of the system, signal leakage, etc., achieve excellent alignment performance, meet simultaneous alignment, Effect of reducing pilot symbol overhead

Pending Publication Date: 2022-03-15
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of beam alignment, beam spatial scanning will cause signal leakage, which will greatly increase the probability of the system being detected by eavesdroppers

Method used

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  • Downlink multi-user beam alignment and data transmission method for millimeter wave covert communication
  • Downlink multi-user beam alignment and data transmission method for millimeter wave covert communication
  • Downlink multi-user beam alignment and data transmission method for millimeter wave covert communication

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Embodiment Construction

[0065] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are only for explaining the present application, and should not be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0066] It should be noted that in the millimeter wave covert communication system, directly applying the existing beam training strategy without covert requirements will be difficult to match the covert requirements of the system well, which will affect the overall communication performance of the system. For example, the ergodic search strategy has a very ...

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Abstract

The invention relates to the technical field of wireless communication, in particular to a downlink multi-user beam alignment and data transmission method for millimeter wave covert communication. Comprising the following steps: numbering single-directional beams at a base station end, and determining at least two groups of multi-directional beams according to the numbered single-directional beams; the base station side sequentially sends at least two groups of multi-directional beams to all the user sides, and performs downlink beam training from the base station side to the user sides, so as to determine a target downlink beam of each user side; parameters of the millimeter wave covert communication system are optimized, and the maximum average transmission sum rate of most users is determined; and controlling the user sides to receive data signals based on the target downlink beam of each user side and the maximum most user transmission average sum rate. According to the new beam training method provided by the invention, the excellent alignment performance of the millimeter wave covert communication system can be kept, and meanwhile, the concealment performance of the beam training process is improved; optimal deployment of the millimeter wave covert communication system is guided by optimizing key parameters of the system.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a downlink multi-user beam alignment and data transmission method for millimeter wave covert communication. Background technique [0002] With the rapid development of wireless communication technology, security and privacy requirements have gradually attracted widespread attention. The traditional security mechanism based on cryptography has been subjected to more and more severe tests, and it has been unable to meet the security requirements of all levels. Covert communications, also known as low-intercept communications, is beginning to become a new security paradigm for wireless systems. Compared with traditional physical layer security, covert communication aims to hide the communication process, so that the behavior of information transmission will not be noticed by eavesdroppers. Therefore, it can not only ensure that the information content i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/02H04W16/28H04B7/06
CPCH04W16/28H04B7/0617H04W12/02
Inventor 张嘉瑀李旻赵民建刘永城李立言王婵雷鸣
Owner ZHEJIANG UNIV
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