A Design Method of PLL FM Demodulators Using a Quasi-Linear Model and Digital Simulation Techniques

Yasunori IWANAMI  Tetsuo IKEDA  

IEICE TRANSACTIONS (1976-1990)   Vol.E69    No.12    pp.1318-1329
Publication Date: 1986/12/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: PAPER
Category: Communication Systems and Communication Protocols

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PLL(Phase-Locked Loop) FM demodulators have been popularly used in various communication systems as a threshold extension device. However, because of the difficulty of the exact analysis, the practical design of PLL demodulators has greatly depended on the experimental results. In this paper, we will introduce the design method in which PLL parameters are approximately determined using the quasi-linear approximation. These are then checked by the time domain digital simulation. As a result, we may design the practical PLL demodulators without doing experiments.