【摘 要】
：
Conventional parameter estimation methods for pseudo-random binary code-linear frequency modulation (PRBC-LFM) signals require prior knowledge,are computational
【机 构】
：
Science and Technology on Electromechanical Dynamic Control Laboratory,School of Mechatronical Engin
论文部分内容阅读
Conventional parameter estimation methods for pseudo-random binary code-linear frequency modulation (PRBC-LFM) signals require prior knowledge,are computationally complex,and exhibit poor performance at low signal-to-noise ratios (SNRs).To overcome these problems,a blind parameter estimation method based on a Duffing oscillator array is proposed.A new relationship formula among the state of the Duffing oscillator,the pseudo-random sequence of the PRBC-LFM signal,and the frequency difference between the PRBC-LFM signal and the periodic driving force signal of the Duffing oscillator is derived,providing the theoretical basis for blind parameter estimation.Methods based on amplitude method,short-time Fourier transform method,and power spectrum entropy method are used to binarize the output of the Duffing oscillator array,and their performance is compared.The pseudo-random sequence is estimated using Duffing oscillator array synchronization,and the carrier frequency parameters are obtained by the relational expressions and characteristics of the difference frequency.Simulation results show that this blind estimation method overcomes limitations in prior knowledge and maintains good parameter estimation performance up to an SNR of-35 dB.
其他文献
The 795 nm distributed feedback lasers have great application in pumping the Rb D1 transition.In this paper,in order to realize specific 795 nm lasing,we design
To study the incentive mechanisms of cooperation,we propose a preference rewarding mechanism in the spatial pris-oner's dilemma game,which simultaneously consid
Low dimensional materials are suitable candidates applying in next-generation high-performance electronic,opto-electronic,and energy storage devices because of
SIMP steel is newly developed fully martensitic steel for lead-cooled fast reactors and accelerator-driven systems.It is important to evaluate its radiation res
We explore the robustness of a network against failures of vertices or edges where a fraction f of vertices is removed and an overload model based on betweennes
Combining first-principles accuracy and empirical-potential efficiency for the description of the potential energy sur-face (PES) is the philosopher's stone for
The exciton Stark shift and polarization in hemispherical quantum dots (HQDs) each as a function of strength and orientation of applied electric field are theor
We introduce a new integral scheme namely improved Kudryashov method for solving any nonlinear fractional differ-ential model.Specifically,we apply the approach
We study the exact solution of the Gaudin model with Dzyaloshinsky-Moriya and Kaplan-Shekhtman-Entin-Wohlman-Aharony interactions.The energy and Bethe ansatz eq
Many terrestrial experiments have been designed to detect domain walls composed of axions or axionlike particles(ALPs),which are promising candidates of dark ma