异构网中物理层安全技术与能效的研究

发布时间：2018-05-11 20:43

本文选题：异构网络 + 物理层安全　；参考：《华北电力大学》2017年硕士论文

【摘要】：异构网络技术的逐渐普及,MIMO技术的广泛应用,使得无线通信系统的整体性能得到了很大提高。然而,由于无线信道的开放性,系统的保密信息存在着很大的泄露风险,因此系统的通信安全显得越来越重要。跟传统高层加密有很大不同,物理层安全技术可以利用信道的随机性,从物理层上实现信息的安全传输。它从信息论意义上确保了窃听用户无法获取发射端发送的消息信号,在信息安全等研究领域具有广阔的发展前景。针对异构网中的小区边缘用户的物理层安全问题。本文对安全性能较差的小区边缘用户进行了分析。通过对小区边缘用户的安全速率进行优化分析,提出了基于多基站协作的安全协作传输策略,并结合波束成形来提高合法接收端的接收信号强度,削弱窃听端的接收信号强度,从而实现了小区边缘用户的信息安全。最终的仿真验证了算法的准确性。针对合法用户物理层安全与能效的权衡问题。本文在两层异构网中,通过利用宏基站与微基站之间的协作以及有意引入的共信道干扰,设计出一种协作波束成形方案,保证了合法用户的信息安全;将微小区中合法用户的安全速率与系统能效相结合,利用凸优化理论进行算法的推导,最终得到了一种功率分配方案。最后的仿真结果从保密能效和SINR两个角度证明了所提算法在提高系统安全性和降低能耗方面的优势。
[Abstract]:With the gradual popularization of heterogeneous network technology and the wide application of MIMO technology, the overall performance of wireless communication system has been greatly improved. However, because of the openness of the wireless channel, the security of the system becomes more and more important. Different from the traditional high layer encryption, the physical layer security technology can make use of the randomness of the channel to realize the secure transmission of information from the physical layer. It ensures that the eavesdropping user can not get the message signal from the transmitter in the sense of information theory, and has a broad development prospect in the field of information security and other research fields. Aiming at the physical layer security of cell edge users in heterogeneous networks. In this paper, the edge users with poor security performance are analyzed. Based on the analysis of the security rate of the users at the edge of the cell, a secure cooperative transmission strategy based on the cooperation of multi-base stations is proposed, and the beamforming is combined to improve the received signal intensity of the legal receiver and weaken the received signal intensity of the eavesdropping terminal. Thus, the information security of the edge users is realized. Finally, the accuracy of the algorithm is verified by simulation. The tradeoff between physical layer safety and energy efficiency of legitimate users. In this paper, a cooperative beamforming scheme is designed to ensure the information security of legitimate users by utilizing the cooperation between the macro base station and the microbase station and the intentional co-channel interference in the two-layer heterogeneous network. Combining the security rate of legitimate users in microcell and system energy efficiency, the algorithm is deduced by convex optimization theory. Finally, a power allocation scheme is obtained. Finally, the simulation results show the advantages of the proposed algorithm in improving system security and reducing energy consumption from the perspectives of secure energy efficiency and SINR.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN918

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