Accession Number : AD0752466

Title :   All-Weather, Low-Level Navigation and Implementation of a One-Way Ranging, Range-Range Navigation System.

Descriptive Note : Semi-annual rept. no. 5, 10 Oct 71-10 Apr 72.

Corporate Author : OHIO UNIV ATHENS DEPT OF ELECTRICAL ENGINEERING

Report Date : OCT 1972

Pagination or Media Count : 98

Abstract : The report covers work on a LF prototype radio navigation system to provide a backup short-baseline navigation capability for Army aeronautical missions operating from ADF beacon stations. Pursuit of methods to reduce the cost of user equipment has led to the development of a digital receiver with the ability to tune within the LF band. This effort was supported by tradeoff comparison studies between analog and digital receiver methods, a direct-digital frequency synthesizer design for tuning purposes, digitally-tuned superheterodyne receiver techniques, CORDIC digital processor development for navigation coordinate conversion, and relative and absolute phase error analysis. (Author)

Descriptors :   *RADIO NAVIGATION, *RADIO EQUIPMENT, *ALL WEATHER AVIATION, RADIO RECEIVERS, RADIO BEACONS, LOW FREQUENCY, FREQUENCY SYNTHESIZERS, MULTIPLE OPERATION, DIGITAL SYSTEMS, NAVIGATION COMPUTERS, OPTIMIZATION, COMPUTER PROGRAMS.

Subject Categories : Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE