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Scheme and experiment of fast frequency hopping communication system based on SDR

Authors :
Chengyu WEN
Conghui LIAO
Hang XIONG
Hong DU
Source :
Tongxin xuebao, Vol 43, Pp 231-238 (2022)
Publication Year :
2022
Publisher :
Editorial Department of Journal on Communications, 2022.

Abstract

A fast frequency hopping scheme based on SDR was proposed to solve the problem that the existing fast frequency hopping communication system relied on satellite timing.Firstly, a true random sequence was used to perform frequency hopping operation on the modulated signal in this scheme.And the frequency hopping table was obtained by channel down-conversion, low-pass filtering and amplitude peak detection operations.Secondly, the receiver searched for the precise starting point by the peak-to-peak distribution characteristics of the quadrature demodulation amplitude of the baseband signal after de-hopping.Finally, down-conversion was performed and the peak-to-peak amplitude of the quadrature demodulation was checked for exceeding the threshold value to achieve de-hopping for frequency hopping signals.The effectiveness and adaptability of the proposed scheme is verified by using two general-purpose SDR devices with a hopping rate of four hops per symbol period in a real channel with other continuous signals.

Details

Language :
Chinese
ISSN :
1000436X
Volume :
43
Database :
Directory of Open Access Journals
Journal :
Tongxin xuebao
Publication Type :
Academic Journal
Accession number :
edsdoj.305ec45cef9474c8aa4f3d94ba26c85
Document Type :
article
Full Text :
https://doi.org/10.11959/j.issn.1000-436x.2022155