摘要
无线通信传播媒介的开放性,使得无线通信的安全问题无处不在,并且成为了无线通信网络的重要研究课题。而物理层安全技术是指在物理层利用无线信道的随机特性,通过调制编码等技术实现信息的保密传输目标,是未来实现无线网络安全的重要技术分支。随着物理层先进传输技术——多天线、多载波技术的广泛采用,为物理层安全技术提供了更多的可行方案。针对多天线多载波技术推动的无线物理层安全研究最新进展,重点介绍了正交频分复用系统采用时域人造噪声提高安全速率的新方法,最后对未来无线物理层安全的若干潜在研究方向进行了展望。
Due to open propagation environments,security issues are everywhere for wireless communications,and have been important research topics in wireless networks.Physical-layer security,which explores the random characteristics of wireless medium to implement the confidential transmission at the physical-layer through technologies such as coding and modulation,is one of important branches for future wireless network security.With wide adoption of advanced physical-layer techniques,such as multiple antenna and multi-carrier,more feasible schemes are available for physical-layer security. Recent research progresses in multiple antenna/multi-carrier based wireless physical-layer security are reviewed,in which a time-domain artificial noise design scheme for orthogonal-frequency-division-multiplexing（OFDM）systems is introduced emphatically.Finally,some potential research directions in future wireless physical-layer security are presented.
出处
《无线电通信技术》
2014年第4期1-6,共6页
Radio Communications Technology
基金
国家自然科学基金项目(61132002)
关键词
物理层安全
多天线
多载波
人造噪声
physical-layer security
multiple antenna
multi-carrier
artificial noise
