Accession Number:

AD0631857

Title:

THE ANALYSIS OF ADVANCED SYNCHRONOUS TELEMETRY TECHNIQUES.

Descriptive Note:

Final rept.,

Corporate Author:

TRW SPACE TECHNOLOGY LABS LOS ANGELES CALIF

Report Date:

1961-10-15

Pagination or Media Count:

173.0

Abstract:

This report presents the results of a theoretical analysis of an advanced synchronous PCM telemetry system. The system, called carrier-lock, utilizes a bit-rate that is synchronous with the carrier to retain bit, word, and frame synchronization alone when the signal strength drops to a level too low to permit such synchronization to maintained by conventional means. The absolute performance of this system is determined and compared with the performance or a standard PCM telemetry system. The results of a study of typical signal strength records from various Ballistic Missile flights are also presented. The results of the comparison of the two methods of obtaining bit-sync when viewed in the light of the signal strength records, indicate that the synchronous telemetry system has major advantages for those systems in which a digit error rate of 10 to the -1 or higher can be tolerated. Thus with the advant of more complex PCM encoding such as orthogonal, simplex, or redundant error correction codes, the carrier lock system looks most promising. Author

Subject Categories:

  • Telemetry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE