Aiming at the detection failure of strong noise interference in the dual channel of the dual-sequence
frequency hopping (DSFH), the scale transformation stochastic resonance (STSR) is applied for the first time,
and the output signal to noise ratio (SNR) is raised effectively, at the same time, the symbol reception is
completed for DSFH at low input SNR. Firstly, the radio frequency (RF) and intermediate frequency (IF) signals
are analyzed based on the super-heterodyne reception of DSFH; secondly, the equations of probability density
function (PDF), output power spectrum and SNR of the STSR output are derived for the IF signal; finally, the
algorithm of the optimal matching STSR is proposed with the optimal matching parameters. The simulation
results show that the algorithm can effectively solve the detection failure, as the global output SNR of DSFH is
strongly improved that the output SNR can reach ?17.72 dB when the input SNR is ?20 dB after the processing
of the optimal matching STSR.
LIU Guangkai (刘广凯), SUN Huixian (孙慧贤), QUAN Houde (全厚德), CUI Peizhang (崔佩璋), ZHU Shilei (朱世磊), CHI Kuo (池阔)
. Preliminary Application of Scale Transformation Stochastic Resonance in Dual-Sequence Frequency Hopping System[J]. Journal of Shanghai Jiaotong University(Science), 2019
, 24(6)
: 775
-781
.
DOI: 10.1007/s12204-019-2136-9
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