Research On Green And Secure Communication In IA-based Network Based On Full-duplex Receiver

In recent years,the rapid development of wireless communication technology has exacerbated three thorny issues while designing a wireless communication system: interference,security,and energy consumption.Interference Alignment(IA),Physical Layer Security(PLS),and Simultaneous Wireless Information and Power Transfer(SWIPT)are respectively applied to interference management,secure communication and green communication,and there have been many excellent research results in these fields.However,these three important areas are usually separate,independent,and the combination of the three areas is often ignored.Therefore,how to improve the system performance by combining IA,PLS and SWIPT is of great significance.In this paper,to solve security problem and energy consumption problem in IA-based networks,the artificial noise assist technology of PLS and SWIPT are used to realize secure and green communication.We first introduced the IA-based network,studied the technical principles of IA in detail,and then introduced the key technologies of PLS and SWIPT.Then,the necessity of artificial noise assist technology and SWIPT in IA-based networks is explained,then the applications are analyzed.In order to further improve the security performance and energy harvesting efficiency in IA-based networks,we proposed a secure and green communication scheme,which uses full-duplex receivers to transmit artificial noise in an IA-based network,then established the network model.In this network model,we realized secure communication by artificial noise transmitted by full-duplex receivers and achieved green communication by harvesting the energy of interference signals and artificial noise.The distributed IA algorithm and SWIPT optimization algorithm based on this network model are deduced.The security performance and energy harvesting efficiency of this network model are compared with the traditional ones.Simulation results show that the user's transmission rate achieved in the proposed scheme is the same as the traditional IA-based network.At the same time,the anti-eavesdropping performance is better than the IA-based network with artificial noise transmitted by transmitter.What's more,the addition of artificial noise improves the energy harvesting efficiency.The relay technology is also studied in this paper,then IA-based networks with relay cooperation and the role of relay technology in IA-based networks are analyzed.In order to further improve the performance in IA-based networks,we proposed a secure and green communication scheme that uses full-duplex receivers to transmit artificial noise in an IA-based network with relay cooperation.In this network model,artificial noise transmitted by full-duplex receiver is used to implement secure communication,and SWIPT is used to harvest interference signals and artificial noise to achieve green communication.A distributed interference alignment algorithm based on this network model is deduced.The user's transmission rate,the eavesdropping rate,and the user's energy harvesting efficiency are compared.Simulation results show that while ensuring the original security performance and energy harvesting efficiency,the transmission rate has been significantly improved after the relay node is added in the IA-based network.