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