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基于离散分数阶傅里叶变换的二维跳频通信系统及性能分析

宁晓燕 赵东旭 朱云飞 王震铎

宁晓燕, 赵东旭, 朱云飞, 王震铎. 基于离散分数阶傅里叶变换的二维跳频通信系统及性能分析[J]. 电子与信息学报, 2023, 45(2): 497-504. doi: 10.11999/JEIT211338
引用本文: 宁晓燕, 赵东旭, 朱云飞, 王震铎. 基于离散分数阶傅里叶变换的二维跳频通信系统及性能分析[J]. 电子与信息学报, 2023, 45(2): 497-504. doi: 10.11999/JEIT211338
NING Xiaoyan, ZHAO Dongxu, ZHU Yunfei, WANG Zhenduo. Two-dimensional Frequency Hopping Communication System and Performance Analysis Based on Discrete Fractional Fourier Transform[J]. Journal of Electronics & Information Technology, 2023, 45(2): 497-504. doi: 10.11999/JEIT211338
Citation: NING Xiaoyan, ZHAO Dongxu, ZHU Yunfei, WANG Zhenduo. Two-dimensional Frequency Hopping Communication System and Performance Analysis Based on Discrete Fractional Fourier Transform[J]. Journal of Electronics & Information Technology, 2023, 45(2): 497-504. doi: 10.11999/JEIT211338

基于离散分数阶傅里叶变换的二维跳频通信系统及性能分析

doi: 10.11999/JEIT211338
基金项目: 国家自然科学基金(62001138),黑龙江省自然科学基金(LH2021F009),中国博士后科学基金(2020M670885)
详细信息
    作者简介:

    宁晓燕:女,副教授,研究方向为认知通信与电子战

    赵东旭:男,硕士生,研究方向为认知通信与电子战

    朱云飞:男,硕士生,研究方向为变换域通信理论

    王震铎:男,副教授,研究方向为变换域通信理论

    通讯作者:

    王震铎 zhenduowang@hrbeu.edu.cn

  • 中图分类号: TN914.4

Two-dimensional Frequency Hopping Communication System and Performance Analysis Based on Discrete Fractional Fourier Transform

Funds: The National Natural Science Foundation of China (62001138), The Natural Science Foundation of Heilongjiang Province (LH2021F009), China Postdoctoral Science Foundation (2020M670885)
  • 摘要: 传统跳频(FH)通信技术具有抗干扰能力强、截获概率低等优点,广泛应用在军民领域。针对检测传统跳频的手段越来越成熟,信息易被截获的问题,该文借鉴正交频分复用(OFDM)系统框架,提出一种基于离散分数阶傅里叶变换(DFrFT)的时宽与起始频率跳变的分数阶跳频(FrFT-FH-VTFB)系统,设计了一种新的系统框架,实现信息隐蔽传输的同时,通过DFrFT的工程实现规避传统跳频工程应用中跳速受频率合成器限制的问题。该系统通过两组不同伪随机序列选取时宽与起始频率跳变的Chirp基信号,实现系统参数的多维变换,打破系统的周期特性。此外,建立了系统发送与接收两端数学模型,并在此基础上推导了系统在白噪声信道下的理论误码率。仿真结果表明,该文所设计的系统有较好的抗衰落性能;且功率谱淹没在噪声之下,时频域特征无明显周期特性,有较好的隐蔽性。
  • 图  1  FrFT-FH-VTFB系统原理框图

    图  2  时频域跳频图案

    图  3  归一化跳频图案

    图  4  不同条件下理论误码率与仿真结果对比

    图  5  AWGN信道系统性能对比

    图  6  衰落信道系统性能对比

    图  7  FrFT-FH-VTFB信号循环谱分析

    图  8  FH信号循环谱分析

    图  9  功率谱分析

    图  10  基带信号倒谱对比

    表  1  各系统参数设置

    系统基信号跳点时宽个数带宽个数平均时宽带宽积平均带宽(MHz)平均时宽(μs)
    FrFT-FH-VTFBChirp16812502012.5
    FrFT-FH-FTFBChirp16112502012.5
    FrFT-FH-FTVBChirp16182502012.5
    FH正弦信号16112012.5
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-11-15
  • 修回日期:  2022-06-20
  • 录用日期:  2022-07-14
  • 网络出版日期:  2022-07-19
  • 刊出日期:  2023-02-07

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