基于极化状态调制的OFDM移动通信系统物理层加密技术研究

项目名称： 基于极化状态调制的OFDM移动通信系统物理层加密技术研究

项目编号： No.61501458

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 魏冬

作者单位： 中国科学院信息工程研究所

项目金额： 23万元

中文摘要： 课题针对传统OFDM调制信号泄漏调制信息所带来的移动通信系统信息安全问题，开拓性地提出在OFDM调制的基础上引入极化状态调制，以构建多维星座消除信号调制信息特征，并利用无线信道去极化效应加密多维星座，从而实现加密OFDM移动通信系统物理层的思想。围绕利用极化状态调制加密OFDM系统物理层，课题首先研究多载波极化状态-幅度-相位调制方法，在保证通信高效可靠的前提下，设计隐藏信号调制信息特征的多维星座结构及映射规则；其次，为进一步加密物理层，研究利用无线信道去极化效应的加密发射技术，利用无线信道去极化效应的独特性，设计极化加密预编码加密多维星座；最后，研究基于多维星座的多载波极化状态-幅度-相位解调方法，并评估本课题方案的安全性及有效性。至此，课题在保证通信质量高效可靠的同时巧妙解决了OFDM移动通信系统物理层安全这一难题，建立了一套利用极化状态调制解决移动通信系统物理层安全的新理论体系。

中文关键词： 物理层安全；无线物理层安全；物理层加密技术

英文摘要： To solve the information security problem of the OFDM mobile communication system, this research project proposes to introduce the polarization state modulation, construct the multidimensional constellation, which can eliminate the modulation information feature of signal, and utilize the channel depolarization effect to encrypt the multidimensional constellation., so the physical layer security of OFDM mobile communication system can be realized while ensuring the efficient and reliable of communication quality. Firstly, this project researches on the multi-carrier polarization state- amplitude-phase modulation is investigated, through designing the multidimensional constellation structure and the mapping rule, the carrier’s modulation information can be eliminated. Secondly, utilizing the channel depolarization effect, the researches on transmission encryption techniques are carried to further encrypt the physical layer; the polarization encryption pre-coding is also designed. Finally, the researches on multi-carrier polarization state-amplitude–phase demodulation is presented, then the safety and efficiency of this project are evaluated. Rely on this project, the information security problem of the OFDM mobile communication system caused can be resolved intelligently. The theory system, which encrypts the physical layer by modulating polarization state, will be creatively established in the mobile communication physical security field.

英文关键词： physical layer security;wireless communication physical layer security;physical layer encryption