Blind estimation methods for bpsk signal based on duffing oscillator

Ke Wang, Xiaopeng Yan*, Zhiqiang Zhu, Xinhong Hao, Ping Li, Qian Yang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

To realize the blind estimation of binary phase shift keying (BPSK) signal, this paper describe a new relational expression among the state of Duffing oscillator excited by BPSK signal, the pseudo-random code of BPSK signal, and the difference frequency between the to-be-detect signal and internal drive force signal of Duffing oscillator. Two output characteristics of Duffing oscillators excited by BPSK signals named implied periodicity and pilot frequency array synchronization are presented according to the different chaotic states of Duffing oscillator. Then two blind estimation methods for the carrier frequency and pseudo-random sequence of the BPSK signal are proposed based on these two characteristics, respectively. These methods are shown to have a significant effect on the parameter estimation of BPSK signals with no prior knowledge, even at very low signal-to-noise ratios (SNRs).

Original languageEnglish
Article number6412
Pages (from-to)1-21
Number of pages21
JournalSensors
Volume20
Issue number22
DOIs
Publication statusPublished - 2 Nov 2020

Keywords

  • BPSK signal
  • Blind estimation
  • Duffing oscillator
  • Low SNRs

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