Paper Info
Title
A circular zone partition method for identifying Duffing oscillator state transition and its application to BPSK signal demodulation
Abstract
When a Duffing oscillator is applied to signal detection, identifying its state transition is indispensable. Due to lack of an effective method for automatically distinguishing the state transition, phase analysis is extensively used. However, it needs ocular estimation to identify phase pattern corresponding to transition of Duffing oscillator. Hence it is not fit for communication signal demodulation. To solve the problem, this paper proposes a method, called circular zone partition (CZP), for partitioning trajectory on the phase plane of Duffing oscillator. First, a computing model for Duffing oscillator is described. Then, the fundamental principle and algorithm for the CZP method are discussed. Meanwhile the equation of a circular zone divider and its realization are presented. Thus, by way of the divider, the two-dimensional phase trajectory pattern of Duffing oscillator driven by an external signal can be transformed into the one-dimensional time signal, whose envelop after being filtered is able to indicate the state transition, i.e. the presence or the absence of external signal. Finally, to verify the effect of the CZP method on binary phase shifted keying (BPSK) signal demodulation, two examples are presented and simulation results show that this CZP method is accurate and valid for BPSK signal demodulation.
Year
DOI
Venue
2011
10.1007/s11432-011-4199-6
SCIENCE CHINA Information Sciences
Keywords
Field
DocType
chaos,digital communication,nonlinear oscillators,receivers,signal detection
Demodulation,Time signal,Detection theory,Control theory,Keying,Phase plane,Mathematics,Duffing equation,Binary number,Phase-shift keying
Journal
Volume
Issue
ISSN
54
06
1869-1919
Citations 
PageRank 
References 
1
0.41
1
Authors
4
Name
Order
Citations
PageRank
YongQing Fu113.11
DongMei Wu210.41
Lin Zhang39124.95
XingYuan Li46032.46