Systems Engineering and Electronics ›› 2022, Vol. 44 ›› Issue (7): 2084-2095.doi: 10.12305/j.issn.1001-506X.2022.07.03

• Electronic Technology • Previous Articles     Next Articles

Detection algorithm of BPSK signal based on adaptive scale change-bistable stochastic resonance model

Bin LIU1,*, Xiangyu FAN2, Ziwei ZHANG1, Ye ZHANG1   

  1. 1. College of Joint Operations, National Defense University, Beijing 100091, China
    2. Air Force Harbin Flight Academy, Harbin 150088, China
  • Received:2021-07-07 Online:2022-06-22 Published:2022-06-28
  • Contact: Bin LIU

Abstract:

In order to improve the detection performance of binary phase shift keying (BPSK) signals under the background of strong noise, with the signal of the mainstream methods weakened to a certain extent in the process of noise suppression and the signal processing system introducing new noises, which leads to the decline of detection performance, a BPSK signal detection algorithm based on adaptive scale transformation of bistable stochastic resonance model is proposed. The classic bistable stochastic resonance system can only handle small amplitude and low frequency periodic signals, In view of this, we first carry ont bistable stochastic resonance system scale transformation, proving that under the condition of high sampling rate, bistable stochastic resonance system can be applied to the high frequency of BPSK signal. Based on Neyman-Pearson criterion, a nonlinear threshold detection system is designed, and we quantitatively indicate the error rate of detector as a feedback, adaptively adjust system parameters, and construct the complete process of signal detection. The feasibility of scale transformation and the applicability of the proposed algorithm are verified by simulation experiments, which provides a theoretical basis for weak BPSK signal detection under the condition of low signal to noise ratio.

Key words: strong noise, no prior information, binary phase shift keying (BPSK) signal, bistable stochastic resonance system, scale transformation, Neyman-Pearson criterion

CLC Number: 

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