Design of RF stealth signal based on improved chaotic mapping and WFRFT

DOI:	10.11809/bqzbgcxb2023.08.035
Keywords:	radio frequency stealth signal; weighted fractional Fourier transform; chaotic mapping; fuzzy function; related performance
Abstract:	In order to improve the low interception performance of radar RF stealth signal, this paper proposes a method combining the improved one dimensional chaotic mapping and weighted fractional Fourier transform to design a RF stealth signal. The signal uses the improved one dimensional chaotic mapping of intra pulse frequency modulation and interpulse phase modulation, weights the fractional Fourier transform of the modulated composite signal, analyzes the correlation characteristics, power spectrum and fuzzy function of the signal, and compares it with the other two chaotic signals. The simulation results show that the autocorrelation PSL of the composite modulated signal is -81.27 dB, ISL is -72.08 dB, the average power of the signal is -34.41 dB, and the fuzzy function is approximately “pushpin type”, which indicates that the signal has good low interception and anti recognition performance, and the RF stealth performance is good.
Issue:	Vol. 44 No. 8 (2023)
Published:	2023-08-28
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