Heterogeneous network noma physical layer security transmission method

Abstract

The present invention belongs to the field of communication technology, and in particular relates to a NOMA physical layer secure transmission method in a heterogeneous network. Signal power coefficient, and configure the zero-space artificial noise allocation coefficient according to the legal user location distribution, and perform heterogeneous network NOMA physical layer security transmission according to the configured signal power coefficient and zero-space artificial noise allocation coefficient. By rationally configuring artificial noise, the invention enhances the system's ability to resist passive eavesdropping when the quality of the eavesdropping channel is superior to that of legal users, improves the physical layer security performance of NOMA wireless transmission in heterogeneous networks, and enhances the NOMA system's ability to resist potential silent eavesdropping Especially when the quality of the eavesdropping channel is better than that of the legitimate user channel, the physical layer security performance of the system can be improved, and it can be used for secure transmission in mobile communication systems with high user density such as heterogeneous cellular networks.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a heterogeneous network NOMA physical layer security transmission method, which can be used for secure transmission in mobile communication systems with high user density such as heterogeneous cellular networks. Background technique [0002] Due to the continuous increase in the number of users and data traffic, mobile communication networks have developed into heterogeneous cellular networks and dense heterogeneous cellular networks to improve the reuse rate of spectrum resources and space resources. At the same time, in order to further meet the rapid growth of mobile service requirements under the condition of scarce spectrum resources, non-orthogonal multiple access (NOMA) technology has attracted more and more attention from the industry. The basic idea of ​​NOMA technology is to adopt non-orthogonal transmission at the transmitting end, actively int...

AI Technical Summary

Problems solved by technology

Although the natural endogenous physical layer security features of NOMA technology can cause certain difficulties for illegal eavesdropping, it is difficult to fully deal with the security threats when the quality of eavesdropping channels is better than that of legitimate users.

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