摘要
正交频分复用技术已被广泛应用于量子密钥分发系统研究中,在此提出了基于正交频分复用的连续变量量子密钥分发方案,连续变量量子密钥分发过程中发送方以快速傅立叶反变换调制复用子载波,接收方以快速傅立叶变换得到原始频域子载波,并由系统协方差矩阵性能刻画出传输性能。仿真结果显示:正交频分复用技术能够提高连续变量量子密钥分发系统的传输密钥率。
Orthogonal Frequency Division Multiplexing（OFDM）technology has been used for quantum key distribution.Here we propose Continuous-Variable Quantum Key Distribution scheme（CVQKD）using OFDM technology.The transmitter has modulated multiplexed subcarriers by inverse fast Fourier transform,and the receiver demodulated the signal by fast Fourier transform to reduce original subcarriers in CVQKD scheme using OFDM,thus the covariance matrix and secret key rate can be calculated in CVQKD transmission system.Simulation results show that the secure key rate can be improved in CVQKD scheme using OFDM.
作者
董颖娣
彭进业
DONG Ying-di PENG Jin-ye(College of Electronic Information, Northwestern Polytechnical University, Xi＇ an 71007 2, China College of Information and Control Engineering, X{an University of Architecture and Technology, Xi＇ an 710 055, China)
出处
《量子光学学报》
北大核心
2016年第4期348-355,共8页
Journal of Quantum Optics
基金
陕西省教育厅项目(JK1428)
碑林区科技度划项目(GX1605)
西安建筑科技大学基础研究基金项目(JC1514)
关键词
量子密钥分配
正交频分复用
快速傅立叶
协方差矩阵
quantum key distribution
orthogonal frequency division multiplexed
fast Fourier transform
covariance matrix
