Blind Estimation Methods for BPSK Signal Based on Duffing Oscillator

被引：5

作者：

Wang, Ke ^{[1
]}

Yan, Xiaopeng ^{[1
]}

Zhu, Zhiqiang ^{[2
]}

Hao, Xinhong ^{[1
]}

Li, Ping ^{[1
]}

Yang, Qian ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Mechatron Engn, Sci & Technol Electromech Dynam Control Lab, Beijing 100081, Peoples R China

[2] Beijing Inst Elect Syst Engn, Beijing 100854, Peoples R China

来源：

SENSORS | 2020年 / 20卷 / 22期

基金：

中国国家自然科学基金;

关键词：

Duffing oscillator; BPSK signal; blind estimation; low SNRs; DEMODULATOR; LOCATION;

D O I：

10.3390/s20226412

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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).

引用

页码：1 / 21

页数：21

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