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基于混沌理论的无源互调功率预测研究

白春江 崔万照 李军

白春江, 崔万照, 李军. 基于混沌理论的无源互调功率预测研究[J]. 电子与信息学报, 2021, 43(1): 124-130. doi: 10.11999/JEIT190977
引用本文: 白春江, 崔万照, 李军. 基于混沌理论的无源互调功率预测研究[J]. 电子与信息学报, 2021, 43(1): 124-130. doi: 10.11999/JEIT190977
Chunjiang BAI, Wanzhao CUI, Jun LI. Prediction of Passive Intermodulation Level Based on Chaos Method[J]. Journal of Electronics & Information Technology, 2021, 43(1): 124-130. doi: 10.11999/JEIT190977
Citation: Chunjiang BAI, Wanzhao CUI, Jun LI. Prediction of Passive Intermodulation Level Based on Chaos Method[J]. Journal of Electronics & Information Technology, 2021, 43(1): 124-130. doi: 10.11999/JEIT190977

基于混沌理论的无源互调功率预测研究

doi: 10.11999/JEIT190977
基金项目: 国家自然科学基金(U1537211)
详细信息
    作者简介:

    白春江:男,1984年生,高级工程师,主要研究方向为空间微波特殊效应

    崔万照:男,1975年生,研究员,主要研究方向为空间微波特殊效应

    李军:男,1968年生,研究员,主要研究方向为大功率微波无源器件

    通讯作者:

    崔万照 cuiwanzhao@126.com

  • 中图分类号: TN92

Prediction of Passive Intermodulation Level Based on Chaos Method

Funds: The National Natural Science Foundation of China (U1537211)
  • 摘要:

    该文以通信系统中常用的典型微波部件——同轴连接器为研究对象,基于混沌理论对获得的同轴连接器的无源互调(PIM)功率时间序列进行分析,验证了使用混沌理论预测无源互调的有效性。首先通过实验系统获得同轴连接器的3阶无源互调功率时间序列,并对得到的实验数据进行相空间重构,确定该时间序列的最佳嵌入维数m和延迟时间τ。然后,结合最佳嵌入维数和延迟时间,分别构建相图和使用小数据量法计算该时间序列的最大Lyapunov指数,从而从定性和定量角度验证了该无源互调功率时间序列具有混沌特性。在此基础上,基于获得的最大Lyapunov指数对该无源互调功率时间序列进行混沌预测,在最大可预测尺度范围内,理论预测值与实验值最大误差为2.61%,表明采用混沌方法预测无源互调功率效果较好。该文提出的使用混沌理论预测通信系统中微波部件无源互调功率的方法,为开展无源互调抑制技术研究,提高通信系统的性能提供了新思路。

  • 图  1  PIM测试系统及待测样件

    图  2  3阶PIM功率时间序列

    图  3  C-C方法计算的最优时间延迟和最优延迟时间窗口

    图  4  PIM功率时间序列3维相空间图

    图  5  小数据量法计算的最大Lyapunov指数

    图  6  前100 s的预测结果

    图  7  前200 s的预测结果

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出版历程
  • 收稿日期:  2019-12-05
  • 修回日期:  2020-10-18
  • 网络出版日期:  2020-11-19
  • 刊出日期:  2021-01-15

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