Accession Number : AD0286835

Title :   SYNCHRONIZATION METHODS FOR PCM TELEMETRY

Corporate Author : AERONAUTICAL SYSTEMS DIV WRIGHT-PATTERSON AFB OHIO

Report Date : AUG 1962

Pagination or Media Count : 1

Abstract : A specially coded synchronization pattern is required for proper identification of repetitive frames of pulse-code-modulated (PCM) sequences of binary bits. Study has shown that, with an assumed set of criteria, there are many favorable sync patterns. An efficient pattern is described on the basis of assumed criteria and hardware implementation at NOLC. This pattern is compared with sync patterns proposed by others. A recommendation is made that a maximum frame sync pattern of 33 bits be specified at present and the choice of optimal patterns be determined by future study. Part I summarizes the conclusions reached in the sync study at NOLC; Part II presents a detailed mathematical analysis, experimental results, and extensive diagrams. (Author)

Descriptors :   *PULSE MODULATION, CODING, TELEMETER SYSTEMS

Distribution Statement : APPROVED FOR PUBLIC RELEASE