摘要
在无线广播网络中,信道的广播特性会导致通信特别容易被窃听,通信中的防窃听问题就变得更加重要。根据多天线(MIMO)高斯广播信道模型(MGBC-CM),并结合了MIMO块对角化预编码思想,建立了一种多天线广播信道可靠安全模型。基站在向用户发送数据之前先进行块对角化预编码,这样不仅可以消除用户之间数据的相互干扰,而且更重要的是还可以有效防止用户数据被窃听。仿真结果表明,该模型具有很好的保密性和安全性。
In wireless broadcast networks,communication is particularly susceptible to eavesdropping due to its broadcast nature.In this case,security and prevention from eavesdropping become more important.According to the basic idea of multi-antenna Gaussian broadcast channel with confidential messages（MGBC-CM） and MIMO block diagnolization precoding,a multi-antenna broadcast channel model is proposed.In this scenario,the base-station does some precoding before sending the data to the users,thus the interference between the users could be eliminated totally while BER of the users also goes down.What＇s more important is that the precoding could also safeguard the users＇ data against others＇ eavesdropping effectively.Simulation results show that the proposed model could achieve better confidentiality and security than conventional broadcast model.
出处
《信息安全与通信保密》
2011年第8期50-53,共4页
Information Security and Communications Privacy
基金
东南大学移动通信国家重点实验室开放研究基金(编号:2010D05)
国家自然科学基金(批准号:61071100
61032003)
新世纪优秀人才计划(编号:NCET-09-0266)联合资助
关键词
广播信道
多天线技术
块对角化预编码
broadcast channel
multi-antenna
block diagnolization precoding
