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FTN传输条件下极化码帧间物理层安全结构设计

张晨宇 刘荣科

张晨宇, 刘荣科. FTN传输条件下极化码帧间物理层安全结构设计[J]. 北京航空航天大学学报, 2018, 44(10): 2217-2223. doi: 10.13700/j.bh.1001-5965.2018.0007
引用本文: 张晨宇, 刘荣科. FTN传输条件下极化码帧间物理层安全结构设计[J]. 北京航空航天大学学报, 2018, 44(10): 2217-2223. doi: 10.13700/j.bh.1001-5965.2018.0007
ZHANG Chenyu, LIU Rongke. Inter-block physical layer security structure design for polar code under FTN transmission[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(10): 2217-2223. doi: 10.13700/j.bh.1001-5965.2018.0007(in Chinese)
Citation: ZHANG Chenyu, LIU Rongke. Inter-block physical layer security structure design for polar code under FTN transmission[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(10): 2217-2223. doi: 10.13700/j.bh.1001-5965.2018.0007(in Chinese)

FTN传输条件下极化码帧间物理层安全结构设计

doi: 10.13700/j.bh.1001-5965.2018.0007
基金项目: 

国家自然科学基金 91438116

详细信息
    作者简介:

    张晨宇  男, 硕士研究生。主要研究方向:极化码物理层安全、超奈奎斯特传输技术、空天信息网络

    刘荣科  男, 教授, 博士生导师。主要研究方向:空天信息网络、多媒体通信与计算、专用集成电路设计

    通讯作者:

    刘荣科, E-mail:rongke_liu@buaa.edu.cn

  • 中图分类号: TN918

Inter-block physical layer security structure design for polar code under FTN transmission

Funds: 

National Natural Science Foundation of China 91438116

More Information
  • 摘要:

    极化码是适用于物理层wiretap信道安全模型的一种编码方式,针对在超奈奎斯特(FTN)条件下传输的极化码,设计了一种无需获知窃听信道信噪比(SNR)的帧间链式加密的安全结构。通过混淆结构将对合法接收端可靠而对非法窃听端阻塞的码元进行扩散,利用物理层主信道和窃听信道的差异,在每一帧中生成主信道可译而窃听信道不可译的密钥序列,对下一帧进行加密,实现安全容量的帧间传输。仿真结果显示,在FTN加速场景和窃听信道SNR相对于主信道波动的前提下,提出的极化码帧间安全结构可在wiretap信道的平均信道退化程度为0 dB时实现信息的安全传输。

     

  • 图 1  基于极化码和FTN传输的帧间物理层安全系统

    Figure 1.  Inter-block physical layer security system based on polar code and FTN

    图 2  码元分集示例

    Figure 2.  An example of bit classification for polar code

    图 3  混淆加密结构

    Figure 3.  Structure of scrambling-encryption module

    图 4  混淆加密器的雪崩效应

    Figure 4.  Avalanche phenomenon of scrambling encryption module

    图 5  解混淆解密结构

    Figure 5.  Structure of inverse scrambling-decryption module

    图 6  FTN-polar-wiretap系统在不同加速系数和滚降系数条件下主信道误帧率

    Figure 6.  Frame error rate of main channel for FTN-polar-wiretap system under different acceleration coefficients and roll-off factors

    图 7  不同窃听信道平均退化程度下的误码率

    Figure 7.  Bit error rate of wiretap channel under different average degree of degeneration

    图 8  不同窃听信道信噪比方差条件下的误码率

    Figure 8.  Bit error rate of wiretap channel under different SNR variance

    图 9  不同升根余弦滚降系数和加速系数下窃听信道误码率

    Figure 9.  Bit error rate of wiretap channel under different root raised cosine roll-off factors and acceleration coefficients

    表  1  误帧率和秘密信息传输码率对比

    Table  1.   Comparison of frame error rate and transmission code rate for secret message

    窃听信道信噪比/dB 主信道误帧率/10-4 窃听信道误帧率
    4 1.6217 0.040 0.097 0.5303
    3.5 1.6217 0.264 0.142 0.5303
    3 1.6217 0.767 0.185 0.5303
    2.5 1.6217 0.991 0.229 0.5303
    2 1.6217 1 0.271 0.5303
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出版历程
  • 收稿日期:  2018-01-08
  • 录用日期:  2018-04-08
  • 刊出日期:  2018-10-20

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