Accession Number : AD0639787

Title :   DEMODULATION OF ANGLE-MODULATED TELEMETRY SIGNALS. VOLUME I. ADVANCED DEMODULATION TECHNIQUES.

Descriptive Note : Rept. for 1 Aug-31 Jul 66,

Corporate Author : WESTERN DEVELOPMENT LABS PHILCO CORP PALO ALTO CALIF

Personal Author(s) : Luby ,D. C. ; Gill ,W. J. ; Ballard ,E. J. ; Spilker,J. J. , Jr

Report Date : AUG 1966

Pagination or Media Count : 250

Abstract : A great deal of study has been given to the demodulation of FM and PM modulated signals. This report is the first of a two-volume series which reviews and contributes to the body of information on this subject. In this volume, three new techniques are discussed which are useful for the demodulation of angle-modulated signals. The three techniques analyzed are: (1) nonlinear post-detection filtering, (2) subharmonic phase-locked loop, and (3) feedforward deviation compression demodulator. The performance of these techniques is analyzed both with respect to noise effects and distortion. Emphasis is given to telemetry signal processing. Several computer (digital) programs were generated to carry out these investigations and nonlinear post-detection filters were simulated on an analog computer. In addition to the three new techniques studied in this report, several other topics are treated. One important topic is a precise analysis of the distortion in phase-locked loops. The second is a review of the effects of predetection recording on telemetry signals. (Author)

Descriptors :   (*TELEMETER SYSTEMS, *DEMODULATION), PHASE LOCKED SYSTEMS, PHASE DETECTORS, DEMODULATORS, SIGNALS, DISTORTION, ELECTROMAGNETIC WAVE FILTERS, NOISE(RADIO), FEEDBACK

Subject Categories : Telemetry

Distribution Statement : APPROVED FOR PUBLIC RELEASE