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Design of ELF/VLF Chirp-BOK Communication Based on Modulated Heating Low Ionosphere

Kaijie ZHOU, Huali WANG, Peipei CAO, Zhangkai LUO

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Summary :

Excitation of Extremely Low Frequency (ELF)/Very Low Frequency (VLF) from ionosphere,which is artificial modulated by High Frequency (HF) waves can provide a way of antenna generation for deep submarine communication. In this paper, based on plasma energy conservation equation, the theoretical model of amplitude modulation HF pump heating low ionosphere for ELF/VLF generation is established. The linear frequency modulation technique of up-chirp and down-chirp have good self-correlation and cross-correlation, by which information can be transmitted by up-chirp and down-chirp. Thus, the linear frequency modulation technique can be applied to the ionosphere ELF/VLF communication. Based on this, a Chirp-BOK (Binary Orthogonal Keying) communication scheme is proposed. Indeed the Chirp-BOK amplitude and power modulation function are designed by combining the linear frequency modulation technique with the square wave amplitude modulation technique. The simulation results show in the condition that the ionosphere is heated by the Chirp-BOK power modulation HF waves, the temperature of ionospheric electronic and the variations of conductivity have obvious frequency modulation characteristics which are the same as that of power modulation, so does the variation of ionospheric current. Thus, when the ionosphere is heated by Chirp-BOK power modulation HF waves, the up-chirp (symbol ‘0’) and down-chirp (symbol ‘1’) ELF/VLF signals can be generated.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E101-A No.12 pp.2464-2471
Publication Date
2018/12/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.E101.A.2464
Type of Manuscript
PAPER
Category
Communication Theory and Signals

Authors

Kaijie ZHOU
  PLA Army Engineering University,Huaiyin Normal University
Huali WANG
  PLA Army Engineering University
Peipei CAO
  Huaiyin Normal University,Nanjing University of Science and Technology
Zhangkai LUO
  Space Engineering University

Keyword