Mainlobe Width Reduction Using Linear and Nonlinear Frequency Modulation

2009 ◽  
Author(s):  
Katamaneni SriDevi ◽  
D. Elizbath Rani
Keyword(s):  
Frequency Modulation ◽  
Nonlinear Frequency ◽  
Linear And Nonlinear ◽  
Width Reduction

Linear and nonlinear frequency shifts in acoustical resonators with varying cross sections

2001 ◽  
Vol 110 (1) ◽  
pp. 109-119 ◽  
Author(s):  
Mark F. Hamilton ◽  
Yurii A. Ilinskii ◽  
Evgenia A. Zabolotskaya
Keyword(s):  
Cross Sections ◽  
Nonlinear Frequency ◽  
Frequency Shifts ◽  
Linear And Nonlinear

scholarly journals Numerical analysis of weak acoustic shocks in aperiodic array of rigid scatterers

2020 ◽  
Author(s):  
Michael Muhlestein ◽  
Carl Hart
Keyword(s):  
Numerical Experiments ◽  
Periodic Structures ◽  
Nonlinear Propagation ◽  
Nonlinear Frequency ◽  
Relative Importance ◽  
Frequency Content ◽  
Rectangular Waveguides ◽  
Initial Shock ◽  
Linear And Nonlinear ◽  
Kzk Equation

Nonlinear propagation of shock waves through periodic structures have the potential to exhibit interesting phenomena. Frequency content of the shock that lies within a bandgap of the periodic structure is strongly attenuated, but nonlinear frequency-frequency interactions pumps energy back into those bands. To investigate the relative importance of these propagation phenomena, numerical experiments using the Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation are carried out. Two-dimensional propagation through a periodic array of rectangular waveguides is per-formed by iteratively using the output of one waveguide as the input for the next waveguide. Comparison of the evolution of the initial shock wave for both the linear and nonlinear cases is presented.

scholarly journals Technique of Definition of Relative Mean Square Assessment of Distortions of the Range of the Signal with Angular Modulation in Digital Synthesizers with Uniform Sampling

2019 ◽  
pp. 1-13
Author(s):  
Dmitry S. Viktorov ◽  
Ekaterina V. Plastinina
Keyword(s):  
Nonlinear Frequency ◽  
Mean Square ◽  
Uniform Sampling ◽  
Linear And Nonlinear ◽  
Definition Of ◽  
Frequency Modulations

In the article the technique allowing to calculate relative mean square assessment of the distortions of a range caused by sampling of a nonquantized signal with angular modulation is considered. For two types of signals, with linear and nonlinear frequency modulations, have calculated the dependences allowing to determine the necessary frequency of sampling by a preset value of relative mean square assessment of distortions of signals

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