› › A New Technique For Measuring Power Spectra Of Complex Non Stationary Signals

A New Technique for Measuring Power Spectra of Complex Non Stationary Signals

Author : J. F. Kenney

Publisher :

Page : 16 pages

File Size : 25,70 MB

Release : 1966

Category : Power spectra

ISBN :

Get eBook

Book Description

In scientific research it is frequently desirable to make an accurate measurement of the power spectrum of a complicated time-varying signal. The performance of a Sona-Graph Audio Spectrum Analyzer can be upgraded for this purpose by changing the output format from a carbon-deposited paper that is burned by an electric arc to an oscilloscope and camera system. The time resolution is improved, and direct amplitude measurements are now possible. The utility of the system is demonstrated by analysis of samples of VLF and ULF emissions. The technique can be used in many fields of scientific research, such as geophysics, oceanography, biology, medicine, and acoustics. (Author).



Measurement of Power Spectra for Nonstationary Random Signals

Author : P. T. Schoenemann

Publisher :

Page : 24 pages

File Size : 40,99 MB

Release : 1962

Category : Power spectra

ISBN :

Get eBook

Book Description

The use of standard techniques for measuring the power spectra of stationary phenomena in the treatment of nonstationary physical phenomena can lead to erroneous results. Some of the tools available for the analysis of nonstationary random phenomena are outlined in this report and the applicability of these tools to some practical engineering problems is discussed.



Technical Abstract Bulletin

Author : Defense Documentation Center (U.S.)

Publisher :

Page : 784 pages

File Size : 49,92 MB

Release : 1967

Category : Science

ISBN :

Get eBook

Book Description





The Measurement of Power Spectra, from the Point of View of Communications Engineering

Author : Ralph Beebe Blackman

Publisher :

Page : 222 pages

File Size : 14,32 MB

Release : 1959

Category : Mathematics

ISBN :

Get eBook

Book Description

An unabridged and corrected republication of Part I and Part II of The measurement of power spectra from the point of view of communications engineering, which originally appeared in the January 1958 and March 1958 issues of volume XXXVII of the Bell system technical journal.





Spectrum Analysis of VLF Emissions

Author : Byung Gan Lee

Publisher :

Page : 58 pages

File Size : 19,99 MB

Release : 1968

Category : Electric waves

ISBN :

Get eBook

Book Description

Amplitude analysis of discrete VLF emissions using the Rayspan spectrum analyzer showed characteristics that are not readily detected using the conventional 'frequency' spectrograms. From a small sampling of discrete VLF emissions recorded at various ground stations, the following observations were made: Rise and fall times may be as small as 15 - 20 msec; Emissions that appear 'single' on a frequency spectrogram may consist of closely-linked shorter emissions, each having a duration of the order of 100 msec; Frequency modulation, previously suspected in some frequency spectrograms, is confirmed. In the samples studied the frequency of modulation ranged from 35 Hz to 70 Hz, while the frequency deviation lay mainly in the range 25 Hz to 50 Hz. (Author).







Dimensions

Author :

Publisher :

Page : 744 pages

File Size : 21,57 MB

Release : 1958

Category : Technology

ISBN :

Get eBook

Book Description