Rapid approximative calculation and optimization of PLL-FM-demodulation threshold

Author

Mohr, W.

Author_Institution

Inst. fuer Hochfrequenztechnik, Hannover Univ., West Germany

fYear

1988

fDate

7-9 Jun 1988

Firstpage

595

Abstract

There is currently no analytic technique available to calculate the threshold-level for a PLL-FM-demodulator with IF-prefilter and a modulated carrier. A method is developed with a novel threshold criterion taken from the results of time-domain simulations, which allows an easy and rapid calculation of the threshold level and the optimization of the loop design with an approximation theory with accuracy of about 1 dB. However, a numerical integration must be carried out. The calculation of the whole threshold curve requires in all cases of practical interest only a few seconds on a CDC-180-990 computer. The results are in good agreement with time-domain simulations and with measurements as well, within the limits of measurement

Keywords

approximation theory; demodulators; frequency modulation; optimisation; phase-locked loops; time-domain analysis; IF-prefilter; PLL-FM-demodulator; approximation theory; loop design optimisation; modulated carrier; numerical integration; threshold criterion; threshold-level; time-domain simulations; Bandwidth; Computational modeling; Computer simulation; Design optimization; Frequency measurement; Gaussian noise; Nonlinear distortion; Phase locked loops; Signal processing; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1988., IEEE International Symposium on

Conference_Location

Espoo

Type

conf

DOI

10.1109/ISCAS.1988.14996

Filename

14996