Accession Number : AD0755940

Title :   Investigations of Microwave Landing System Conventional and Doppler Scanning Beam Techniques.

Descriptive Note : Final rept. Jun 71-Sep 72,

Corporate Author : CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Personal Author(s) : Beneke,J. ; Wightman,C. W. ; Becker,H. D. ; Kassel,C. E.

Report Date : SEP 1972

Pagination or Media Count : 182

Abstract : The report summarizes the results of analytical and experimental investigations carried out in support of the Microwave Landing System (MLS) program of the Federal Aviation Administration. The experimental program consisted of a simulation of the MLS signals that would be received in an aircraft. The systems simulated included conventional scanning beams with frequency and pulse angle coding, step-scan beams with frequency and time interval coding and the doppler scan technique. Angle measurement errors were determined for a wide range of signal parameters. Errors were measured in the presence of a single multipath of variable characteristics. Conclusions were drawn concerning the capability of the several signal formats to meet criteria accuracy requirements. The need for special processing techniques to reduce the effects of multipath is discussed. (Author)

Descriptors :   (*DOPPLER NAVIGATION, MICROWAVE EQUIPMENT), (*TERMINAL FLIGHT FACILITIES, *AIR TRAFFIC CONTROL SYSTEMS), MULTIPATH TRANSMISSION, INSTRUMENT LANDINGS, FREQUENCY MODULATION, PULSE CODE MODULATION, DISTANCE MEASURING EQUIPMENT, AUTOMATIC GAIN CONTROL, MICROWAVE EQUIPMENT

Subject Categories : Air Navigation and Guidance
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE