A DIGITAL SIMULATION OF THE WULLENWEBER DIRECTION FINDING SYSTEM
Abstract
A description is given of a digital model for simulation of the Univ. of Illinois Wullenweber direction finding system when operating in the scanning mode. The Wullenweber array is a circular array of 120 vertical monopoles located on the periphery of a circle about 303 meters (994 feet) in diameter. The programmed digital model uses as input the azimuth, elevation angle and frequency of an assumed incoming signal, and from this determines the amplitude and phase response of the 60 antennas illuminated by that particular signal; the remaining 60 responses are set to zero. The result of scanning is a set of numbers representing the real and quadrature axis of the scanner output of each scanning point within the sector sampled. The remaining sampling points have negligible outputs and are set to zero. A number of samples per revolution is chosen that will allow 12 or more significant samples to be retained before the bearing is computed. By the sample rejection scheme, (1) the maximum sample and its location may be determined and (2) the maximum error may be kept to less than 1 degree in bearing over the 4.0 to 12.0 mhz frequency range.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1965
- Accession Number
- AD0626324
Entities
People
- Edwin Jr C. Jones
Organizations
- University of Illinois Urbana–Champaign