Accession Number:

ADA000945

Title:

An Inverse Fourier Transform for In-Place Continuous-Wave Data Reduction.

Descriptive Note:

Final rept. 10 May-30 Oct 73,

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s):

• Heubach,H. G.
• Larson,A. G.
• Singleton,R. C.

Report Date:

1974-07-01

Pagination or Media Count:

283.0

Abstract:

The selection and testing of an inverse Fourier transform IFT algorithm for use with Minuteman In-Place continuous-wave CW data are described. The CW data are obtained in the presence of noise at unequally spaced frequency intervals the time response to be obtained is a transient. A trapezoidal approximation to the Fourier integral transform is selected. Time-domain effects of the IFT algorithm, an amplitude-windowing algorithm, a phase-unwrapping algorithm, typical CW sampling functions, and nominal measurement errors are investigated in a computerized simulation study using analytically defined input functions. IFT results are also presented for some typical CW data, and their validity, reliability, and accuracy are discussed.

Descriptors:

• *ELECTROMAGNETIC PULSES
• *RADIATION HARDENING
• *GUIDED MISSILE SILOS
• COMPUTER PROGRAMS
• SIGNAL PROCESSING
• COMPUTERIZED SIMULATION
• FOURIER TRANSFORMATION
• GUIDED MISSILES
• TRANSFER FUNCTIONS
• CONTINUOUS WAVES
• FORTRAN
• DATA REDUCTION
• SAMPLING
• SITE SELECTION

Subject Categories:

• Cybernetics
• Guided Missile Launching and Basing Support
• Electromagnetic Pulses

Distribution Statement:

APPROVED FOR PUBLIC RELEASE