Communication method and system based on encryption transmission and wireless energy carrying

Abstract

The invention discloses a communication method and system based on encryption transmission and wireless energy carrying, and belongs to the technical field of wireless communications. According to the communication method, manual additional noise is added into signals of a sending end BS, and on the premise of keeping the signal to noise ratio on a master user link, a beam forming technology is adopted according to the orthogonality of a channel and the manual noise, so that the signal to noise ratio on a wiretap link is reduced, encryption transmission speed of the system is increased, and safety of information transmission is promoted; a dynamic power distribution method based on slot time switching is adopted for an access end, by using slot time switching, a part of the signals are used for energy harvesting, and the other part of the signals are used for information interaction, so that energy and information are transmitted simultaneously, and a part of the signals received from a base station by a user are used for energy harvesting and are converted into chemical energy to be stored in a battery so as to meet the need for power of operation of user nodes. Meanwhile, aiming at the incomplete characteristic of actual channel information, a norm approximation lossy scheme is adopted, so that a system device possibly operates in a defective channel environment, and robustness of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a communication method and system based on encrypted transmission and wireless energy carrying. Background technique [0002] With the rapid development of the current society, interdisciplinary and multi-platform integration and integration have gradually become an important trend of technological innovation and the source of power for industrial progress. At the same time, traditional limited resources such as water, energy, and radio spectrum are becoming stretched by people's growing demands due to resource scarcity. Therefore, sustainable scientific development urgently needs to integrate the existing research results of communication technology and energy technology, and bring forth the new, so as to meet people's needs for efficient and reliable information exchange, and effectively cope with the pressure of energy and spectrum shortage. [0003] On the other...

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Problems solved by technology

However, from the perspective of information transmission security, ER users in the system model also have good channel information, so they may also become eavesdropping nodes for some criminals, eavesdropping on the information transmitted from BS to User, so that the confidentiality of information transmission is greatly improved reduce, and eventually lead to a series of information security issues

[0006] In a real communication environment, it is not difficult for the base station BS at the sending end to have the channel static information on the primary user link. However, due to the randomness of the location of the eavesdropping user, it is impossible for the base station BS to have complete channel static information on the eavesdropping link. , the traditional wireless energy carrying system does not take into account the uncertainty of the channel, that is, the robustness of the channel

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