Accession Number : ADA308099

Title :   Wideband Signal Analysis and Synthesis Applied to Electromagnetic Transient Waveforms.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Jeong, Soonho

PDF Url : ADA308099

Report Date : MAR 1996

Pagination or Media Count : 89

Abstract : This thesis presents the bandpass inverse fast Fourier transform (IFFT) filter bank and the multirate digital filter bank techniques to synthesize test point waveforms from constituent waveforms recorded by two instruments as part of an aircraft electromagnetic hardness evaluation test. The component waveforms are recorded by two separate measurement systems (High Powered Pulse Waveform (HPW) in the time domain and Continuous Sweep Waveform (CSW) in the frequency domain) under two different aircraft orientations (parallel and perpendicular). Data from two orientations are combined using the sinusoidal modeling algorithm (SMA). The tree structured filter bank with power symmetric overlap method and the bandpass IFFT with spectral concatenation method are developed to further combine these waveforms with an overlapping frequency spectrum to produce the corresponding synthesized test point waveform.

Descriptors :   *ELECTROMAGNETIC INDUCTION, *ELECTROMAGNETIC PULSES, TRANSIENTS, MEASUREMENT, AIRCRAFT, SYNTHESIS, WAVEFORMS, ORIENTATION(DIRECTION), THESES, SPECTRA, SYMMETRY, BROADBAND, FAST FOURIER TRANSFORMS, OVERLAP, TIME DOMAIN, FREQUENCY DOMAIN, BANDPASS FILTERS.

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE