Accession Number : AD0282110

Title :   THE THEORY AND DESIGN OF F.M. RECEIVERS,

Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y MICROWAVE RESEARCH INST

Personal Author(s) : Hess,Donald

Report Date : 11 MAY 1962

Pagination or Media Count : 45

Abstract : The spectrum of an F.M. wave modulated by gaussian noise is studied. As the r.m.s. frequency deviation of the wave becomes greater than the maximum frequency component of the modulating signal, the power spectrum of the F.M. wave becomes gaussian in form independent of the power spectrum of the modulating signal. The response of linear band-pass networks to an F.M. signal is studied. The response of the linear network is written as the sum of a quasi static response and an error term. The quasi static response is a modified version of the steady state response. The modification permits a very tight bound to be put on the error term and hence leads to very tight bandwidth specifications on F.M. filters. Several new and several existing F.M. demodulators are studied to establish design criteria for the demodulators. Finally the ability of a phase-lock loop to demodulate an F.M. signal is studied. Relationships are derived which specify the minimum closed loop bandwidth needed to demodulate a given F.M. signal with a specified amount of output distortion. (Author)

Descriptors :   (*BIBLIOGRAPHIES, *SCIENTIFIC REPORTS)

Distribution Statement : APPROVED FOR PUBLIC RELEASE