计算机应用研究2017，Vol.34Issue(3)：879-882,4.DOI:10.3969/j.issn.1001-3695.2017.03.056
基于信道估计的物理层安全多天线选择功率分配方案
Improving physical layer security exploiting multi-antennas selection with training sequence channel estimation
摘要
Abstract
In current research about improving physical layer security exploiting multi-antennas selection at the transmitter,the assumption of knowing the channel state information (CSI) of main channel has been excessively idealized.This paper considered a practical scheme based on channel estimation at the transmitter,which selected multiple antennas using the estimated CSI of main channel.First of all,transmitter estimated the CSI of main channel by receiving the training sequence sending by the receiver.Then it selected antennas and allocated transmit power of each antenna using the estimated CSI.It deduced the secrecy capacity of the proposed scheme and designed a simulation for test and verify.The results show the proposed scheme achieves the non-zero secrecy capacity in low signal-to-noise ratio with channel estimation error.Bit error rate(BER) of receiver is sharply decreasing to 10-4 along with the rising signal to noise ratio,besides the bit error rate of eavesdropper stays high relatively.It shows the validity and feasibility of the proposed scheme.关键词
物理层安全/多天线选择/训练序列/信道估计/保密容量Key words
physical layer security/multiple antennas selection/training sequence/channel estimation/secrecy capacity分类
信息技术与安全科学引用本文复制引用
曾凌清,蔡晓霞,陈红,朱文丽..基于信道估计的物理层安全多天线选择功率分配方案[J].计算机应用研究,2017,34(3):879-882,4.基金项目
国家自然科学基金资助项目(61272333) （61272333）
