Accession Number : ADA183904

Title :   A Compact Digital Communications System. Part 3. Generalising the Phase Locked Loop. Memorandum rept.,

Corporate Author : ROYAL SIGNALS AND RADAR ESTABLISHMENT MALVERN (ENGLAND)

Personal Author(s) : Pritchard,J A

PDF Url : ADA183904

Report Date : Apr 1987

Pagination or Media Count : 57

Abstract : We describe a generalisation of the phase locked loop principle which eliminates the problem of carrier recovery when applied to phase shift signals. The system is tolerant of signal fading and shows orders of magnitude improvements in pull in range and tracking performance over current systems used in satcoms. Pull in range exceeds 150 Hz in an absolute signal to noise ratio of worse than -10 dB. The loop will track a 50 Baud PSK modulated carrier shifting at more than 300 HZ per sec. The flexibility of this example of a new approach to communications engineering has yet to be explored. (Great Britain)

Descriptors :   *DIGITAL COMMUNICATIONS, *PHASE LOCKED SYSTEMS, CATIONS, DIGITAL COMMUNICATIONS, DIGITAL SYSTEMS, ENGINEERING, GREAT BRITAIN, LOOPS, MODULATION, NOISE, PHASE LOCKED SYSTEMS, PHASE SHIFT, RATIOS, SHIFTING, SIGNALS

Subject Categories : Command, Control and Communications Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE