Method and system for improving safety rate of communication system and secure communication system

Abstract

The invention relates to a method and system for improving the safety rate of a communication system and a secure communication system. In the method, under the situation that only statistic information of an eavesdropping channel is known, in order to design covariance matrixes of signals and manual noise and guarantee functions and characteristics of information and energy wireless transmission, a covariance matrix of useful information and the covariance matrix of the manual noise are optimized according to the safety capacity, so that an information receiver obtains the safety rate to the largest extent under constraint conditions of transmission power of a transmitter and constraint conditions of wireless energy received by an energy receiver. By means of the method and system for improving the safety rate of the communication system and the secure communication system, under the condition that legal users and eavesdroppers are in the same system and only the statistic information of the eavesdropping channel is known, the covariance matrixes of the useful information and the manual noise are designed, and the safety capacity of the information receiver is maximized, so that the rate of the communication system is increased and meanwhile information and energy wireless transmission is guaranteed.

Description

technical field [0001] The invention relates to the physical layer security field of wireless communication, in particular to a method and system for improving the security rate of a communication system and a security communication system. Background technique [0002] The continuous change and innovation of wireless communication technology has profoundly changed the way people live and work. However, the accompanying problem of wireless security communication has been bothering people. In the traditional communication security mechanism, the encryption algorithm with extremely high complexity is used to ensure the security of communication. With the improvement of computer computing power, this kind of encryption algorithm based on high complexity is becoming more and more insecure. For this reason, people began to seek a more secure information guarantee mechanism from the perspective of the physical layer. Among them, the use of artificial noise to interfere with eav...

AI Technical Summary

Problems solved by technology

[0004] In the actual wireless communication network, eavesdroppers are generally concealed, only receive information, and do not actively transmit signals. The sending end may not know that there are eavesdroppers in the surrounding open environment, so it is difficult to obtain the perfect channel state of the eavesdropping channel. information

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