Anti-eavesdrop and anti-interference spectrum access method based on bandwidth and power distribution

Abstract

The invention discloses an anti-eavesdrop and anti-interference spectrum access method based on bandwidth and power distribution. According to the method, in order to prevent an eavesdropper from eavesdropping information of a main user, a sending end of a main system sends artificial noise through a part of power and sends signals through remaining power, and meanwhile a receiving end of the main system sends artificial noise so that so that a sending end of a secondary user cannot be influenced by the artificial noise when receiving the signals of the main system; if the main system can reach a target safety rate with the help of a secondary system, the secondary system is allowed to conduct spectrum access; after the secondary system conducts spectrum access, a part of bandwidth is used for helping the main system forward information so that the main system can reach the target safety rate, and the remaining bandwidth is used for sending the information of the main user. By means of the method, mutual interference between the main user and the secondary user is effectively eliminated, and safe transmission of the information of the main user is ensured.

Description

technical field [0001] The invention belongs to the technical field of cognitive radio communication in the field of wireless communication, in particular to an anti-eavesdropping spectrum access method. Background technique [0002] The scarcity of spectrum resources and the inefficiency of fixed spectrum allocation strategies restrict the development of wireless communication systems. The traditional fixed spectrum allocation strategy divides the spectrum into two parts: licensed spectrum and unlicensed spectrum. This allocation strategy authorizes a specific communication system to use a specific spectrum resource, even if the system is not using it, other users are not allowed to use this spectrum resource, which leads to a waste of spectrum resources in time and space, resulting in Low spectrum resource utilization. Cognitive radio has the ability of learning and can exchange information with the surrounding environment to perceive and utilize the available spectrum i...

AI Technical Summary

Problems solved by technology

[0004] In view of the defect that the information in the existing coexistence spectrum access method is easily obtained by eavesdroppers, and to solve the security problem of mutual interference and information transmission between the primary user and the secondary user, the present invention provides a method that can eliminate the secondary user An anti-eavesdropping and anti-jamming spectrum access method based on bandwidth and power allocation that interferes with the primary user and prevents information from being eavesdropped

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