Results 181 to 190 of about 2,219 (213)

Investigation of the process of self-demodulation of acoustic waves in the river sand

The Journal of the Acoustical Society of America, 1999
Experimental investigation and theoretical description of nonlinear self-demodulation of a pulsed high-frequency acoustic wave and propagation of the secondary low-frequency acoustic pulses in dry and water-saturated sand are carried out. The dependence of the propagation time of the video pulses upon the initial static pressure and the relation of the
Veniamin E. Nazarov, Vladimir Yu. Zaitsev, Andrey B. Kolpakov   +2 more
openaire   +1 more source

A 60-GHz injection locked oscillator for self-demodulation ultra-low power radio in 65-nm CMOS

2014 IEEE 21st Symposium on Communications and Vehicular Technology in the Benelux (SCVT), 2014
This paper present a 60 GHz injection locked oscillator in 65-nm CMOS technology. The injection locked oscillator is a key component to realize an ultra-low power self-mixing architecture wake-up radio. In this paper, different methods of injecting a signal into the oscillator are discussed and the current re-use method is implemented to increase the ...
Gao, H., Matters - Kammerer, M., Li, X., Milosevic, D., van Roermund, A., Baltus, P.G.M.   +5 more
openaire   +2 more sources

Comparative analysis of different distortion reduction techniques for parametric loudspeaker based on self-demodulation of amplitude modulated ultrasound waves

2008 Second International Conference on Electrical Engineering, 2008
A highly focused sound beam can be created from the nonlinear interaction of ultrasound waves by using a parametric loudspeaker. An audio signal is produced by the self-demodulation of amplitude modulated sound waves in air. Several preprocessing techniques have been discussed in previous literature to reduce distortion. A comparative analysis of these
J. Munir, U. Imtiaz
openaire   +1 more source

A 12-mW 40–60-GHz 0.18-$\mu {\hbox {m}}$ BiCMOS Oscillator-Less Self-Demodulator for Short-Range Software-Defined Transceivers

IEEE Journal on Emerging and Selected Topics in Circuits and Systems, 2013
In this paper, key design considerations in self-demodulators at millimeter wave range for short-range software-defined transceivers are presented. Oscillator-less demodulators are used to achieve a wide operating range with low power consumption. The proposed demodulator, featured with a new single-input differential-output low noise amplifier and ...
Xiao Peng Yu, Zheng Hao Lu, Bo Yu Hu, Wei Meng Lim, Er Tai Duo, Kiat Seng Yeo   +5 more
openaire   +1 more source

Self demodulation of a pulse of finite amplitude: Does a double hump really exist?

The Journal of the Acoustical Society of America, 1983
During the last meeting of the ASA, some results were presented using a line and cone transducer excited by a pulse modulator [G. L. Sackman, R. L. Eyman, P. J. Lastrange, and A. H. Seeman, J. Acoust. Soc. Am. Suppl. 1, 72, S98 (1982)]. This transducer employs the theory of a parametric transient effect presented by O. R. Berk tay [J. Sound Vib.
openaire   +1 more source

Self-demodulation effects in nonlinear focused beams

2011 IEEE International Ultrasonics Symposium, 2011
Petr Konicek, Michal Bednarik, Milan Cervenka   +2 more
openaire   +1 more source

Self-demodulation of amplitude- and frequency-modulated pulses in a thermoviscous fluid

1993
2876
Averkiou, Michalakis A., Lee, Yang-Sub, Hamilton, Mark F., Averkiou, Michalakis A., Lee, Yang-Sub, Hamilton, Mark F.   +5 more
openaire   +1 more source

Self-compensation three-wavelength demodulation method for the large phase extraction of extrinsic Fabry–Pérot interferometric sensors

Optics and Lasers in Engineering, 2023
Qianyu Ren, Jia Liu
exaly  

Theory of energy flux and polarization changes of a radio wave with two magnetoionic components undergoing self demodulation in the ionosphere

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1974
The absorption of a powerful plane radio wave vertically incident on the lower ionosphere is studied. If it contains the two magnetoionic components with roughly equal amplitudes, the power absorbed per unit volume can be either greater or less than the sum of the powers for the separate components, depending on their phase difference.
openaire   +1 more source

Demodulation of fiber-optic Fabry-Perot sensors through a double-frequency self-correlation method

Optical Fiber Technology, 2021
Zilong Guo, Junying Zhang, Haibin Chen
exaly