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应用科学学报 ›› 2007, Vol. 25 ›› Issue (1): 6-10.

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非零均值随机极化波的统计特性

李永祯1,2, 王雪松1, 汪连栋2, 肖顺平1, 王国玉2   

  1. 1. 国防科技大学电子科学与工程学院, 湖南长沙 410073;
    2. 洛阳市061信箱, 河南洛阳 471003
  • 收稿日期:2006-03-07 修回日期:2006-04-28 出版日期:2007-01-31 发布日期:2007-01-31
  • 作者简介:李永祯,博士,研究方向:目标识别、极化信息处理,E-mail:e0061@sina.com;王雪松,教授,博导,研究方向:空间信息感应技术、新体制雷达技术,E-mail:wxs1019@vcp.sina.com
  • 基金资助:

    全国优秀博士论文专项资金(08100101);“十五”国防预研计划(41303517)资助项目

Statistics of Non-zero Mean Random Polarized Waves

LI Yong-zhen1,2, WANG Xue-song1, WANG Lian-dong2, XIAO Shun-ping1, WANG Guo-yu2   

  1. 1. School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;
    2. P. O. Box 061, Luoyang 471003, China
  • Received:2006-03-07 Revised:2006-04-28 Online:2007-01-31 Published:2007-01-31

PDF

110

被引次数

2

摘要：

在正态分布假设条件下,首先导出了随机电磁波幅度、功率和相位的概率密度分布及联合概率密度分布,然后重点分析了能够完备表征电磁波极化特性的瞬态极化投影矢量(IPPV)的概率密度分布,并分析了极化通道之间相互独立的随机极化波IPPV各分量的概率密度与独立通道方差比的变化关系等.文中结论对电磁信号检测、ESM系统辐射源极化侦察等应用领域具有参考意义.

关键词: 投影矢量, 概率密度函数, 瞬态极化

Abstract:

Statistical characteristics of non-zero mean random polarized waves are studied based on the instantaneous polarization theory.Under a Gaussian hypothesis, probability density functions (PDFs) and joint PDFs of the amplitude, power and phase of random polarized waves are presented.The PDFs of instantaneous polarization projection vector (IPPV) of non-zero mean random polarized waves are then analyzed, which can entirely describe polarization characteristics of electromagnetic waves.Finally, relationship between the PDFs and the covariance ratio between two polarization channels are analyzed, assuming that the two polarization channels are independent.Conclusions drawn in this paper are useful to some applications such as dim signal detection and polarization measurement.

Key words: IPPV, instantaneous polarization, probability density function

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