SOME ELEMENTS OF FM RANGE MEASURING -- SPECTRAL ANALYSIS.
Abstract
Three factors, influencing the performance of FM distance measuring systems generally, were considered with respect to their specific effects on the spectrum of the post mixer signal: (1) Two forms of the modulating signal were studied: (a) A periodic, triangular sweep frequency modulating signal, and (b) A random period triangular sweep frequency modulating signal; (2) Nonlinearity in the frequency-to-modulating voltage characteristic was investigated for three different nonlinear characteristics, (3) Target characteristics were studied with an area target model, two different beam patterns and various surface conditions. Each study in general consisted of appropriate mathematical development of a computational model and then presentation and discussion of calculated spectral data, comprising a parametric study of the effect involved. In the random period study two independent approaches were pursued and results were found to be in essential agreement. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1969
- Accession Number
- AD0684482
Entities
People
- G. A. Mcalpine
- J. C. Isaacs
- J. F. Dammann
- J. H. Highfill
Organizations
- University of Virginia