Detection technique based on stochastic resonance for weak high-frequency CW signal

作者：Li Guo Jun^*; Zeng Xiao Ping; Zhou Xiao Na; Li Lin; Zeng Li

来源：Journal of the University of Electronic Science and Technology of China, 2010, 39(5): 737-741.

DOI：10.3969/j.issn.1001-0548.2010.05.019

• Hough Transformation
• Morse telegraph signal
• Shortwave communication
• Stochastic resonances
• Wigner-Ville distribution

The time-frequency transformation for detecting high-frequency Continuous Wave(CW) signal with heavy background noise has a noticeable decline in performance. A new method for detecting weak CW signal by use of the nonlinear bistable stochastic resonance model is proposed. Firstly, the received CW signal is modulated to low frequency, then filtered by stochastic resonance model and processed by Wigner-Ville Distribution (WVD) transformation and Hough transformation in turns, thus the detection of CW signal within noise can be easily implemented by a certain peak value in (ρ, θ) parameter space. Simulation studies show this method performs very well in the detection of CW signal with low SNR. The new method can be applied to develop the automatic receiver of high-frequency CW telegraph signal.

• 出版日期2010
• 单位西安电子科技大学