Accession Number : AD0800439

Title :   IMPROVED DIGITAL BEARING COMPUTER TECHNIQUES.

Descriptive Note : Technical rept.,

Corporate Author : ILLINOIS UNIV AT URBANA RADIO RESEARCH LAB

Personal Author(s) : Allen, Larry C. ; Ernst, Edward W.

Report Date : AUG 1966

Pagination or Media Count : 54

Abstract : The work reported here is an extension of earlier work on digital bearing computers for small aperature RDF systems. In particular, three areas are studied further. The problem of choosing the proper range for describing the instantaneous bearings is resolved by means of an adaptive process which selects the branch to be 180 deg from the average direction of arrival. An adaptive procedure is also used to group the instantaneous bearings into groups which represent almost an integral multiple of the periodic variation which is found. This allows a wider range of fading rates to be accommodated. The computations for h and a (sub s) are considerably simplified by calculating these quantities from average values of the maximum and minimum instantaneous bearings. The values obtained in this manner appear to be at least as accurate as those obtained by earlier methods.

Descriptors :   *DIGITAL COMPUTERS), (*DIRECTION FINDING, RADIO EQUIPMENT, VOLTAGE, MATHEMATICAL ANALYSIS, RADIO WAVES, OPTIMIZATION, COMPUTER PROGRAMMING, STATISTICAL ANALYSIS, RADIOFREQUENCY INTERFERENCE, SAMPLING.

Subject Categories : Computer Programming and Software
      Computer Hardware
      Direction Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE