Systems Engineering and Electronics ›› 2018, Vol. 40 ›› Issue (7): 1443-1448.doi: 10.3969/j.issn.1001-506X.2018.07.05

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Analysis on amplitude distribution and suppression techniques of atmospheric noise

LUO Zhongtao1, LU Peng1, ZHANG Yangyong2, ZHANG Gang1   

  1. 1. Chongqing Key Laboratory of Signal and Information Processing, Chongqing University of Posts and
    Telecommunications, Chongqing, 400065, China; 2. Laboratory of Low Frequency Electromagnetic
    Communication Technology, Wuhan Maritime Communication Research Institute, Wuhan 430079, China
  • Online:2018-06-26 Published:2018-06-26

Abstract:

Atmospheric noise must be suppressed in low-frequency communication systems. This paper studies the amplitude characteristics of atmospheric noise based on real data and proposes a nonlinearity method. Firstly, Analysis on real noise amplitude demonstrates the non-Gaussianity of atmospheric noise and shows that the amplitude roughly follows the α-stable distribution. Then, based on the traditional Gaussianization algorithm, this paper deduces a novel nonlinearity method which is called as the over-Gaussianization transformation. Finally, simulations of normality test and bit error ratio (BER) on real noise show that higher Gaussianity does not always mean lower BER. The over-Gaussianization method achieves similar BER performance to the locally optimal detector.

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