Title :
A method for determining the non-linear time dependence of windowed data gathered from scattered signals
Author :
Gray, J.E. ; Rice, T.R. ; Conte, J.E. ; Watson, Gregory
Author_Institution :
US Naval Surface Warfare Center, Dahlgren, VA, USA
Abstract :
Moments associated with functions that are the Fourier transform or Fourier series of time-domain signals are studied in order to determine what happens to the frequency spread of a transmitted signal after it has been reflected from an object undergoing nonuniform motion. The example of a sinusoidal wave reflected from an object undergoing constant acceleration is considered. It appears that analytic expressions for moments of finite-time signals that are given by well-behaved sums are also applicable to this waveform
Keywords :
Fourier transforms; frequency-domain analysis; signal processing; time-domain analysis; Fourier series; Fourier transform; constant acceleration; frequency spread; moments of finite-time signals; nonlinear time dependence; nonuniform motion; reflected signal; scattered signals; sinusoidal wave; time-domain signals; transmitted signal; windowed data; Acceleration; Broadcasting; Fourier series; Fourier transforms; Frequency domain analysis; Information analysis; Radar scattering; Signal analysis; Sonar; Time domain analysis;
Conference_Titel :
Time-Frequency and Time-Scale Analysis, 1992., Proceedings of the IEEE-SP International Symposium
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0805-0
DOI :
10.1109/TFTSA.1992.274144
