Accession Number : AD0776141

Title :   The Effects of ATCRBS P sub 2 Pulses on DABS Reliability.

Descriptive Note : Project rept.,

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Harman,W. H. ; Shnidman,D. A.

Report Date : 28 JAN 1974

Pagination or Media Count : 68

Abstract : An analytical study was performed to determine the effects of ATCRBS P sub 2 pulses as interference to DABS uplink transmissions. These effects constitute a major component of all uplink error-producing mechanisms that are anticipated to occur in DABS operation. The study is formulated in a way that includes effects of both receiver noise P sub 2 pulse interference, where the interference can be received from any of a number of different transmitters at different distances from the receiving aircraft. The model includes the randomness associated with whether or not a particular DABS signal is overlapped by any interference pulse, and also the conditional randomness of error production given that an overlap does occur. In fact, a major portion of the study is the determination of the conditional error probability given the occurrence of an overlap with stated signal-to-interference ratio and stated signal-to-noise ratio. (Modified author abstract)

Descriptors :   *Air traffic control systems, *Radar beacons, Data links, Transmitting, Reliability, Electromagnetic interference, Pulse amplitude modulation, Phase modulation

Subject Categories : Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE