NASA NTRS · 19720057207
An all digital phase locked loop for FM demodulation.
Abstract
A phase-locked loop designed with all-digital circuitry which avoids certain problems, and a digital voltage controlled oscillator algorithm are described. The system operates synchronously and performs all required digital calculations within one sampling period, thereby performing as a real-time special-purpose computer. The SNR ratio is computed for frequency offsets and sinusoidal modulation, and experimental results verify the theoretical calculations.
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Greco, J., Garodnick, J., Schilling, D. L.. 1972-01-01. An all digital phase locked loop for FM demodulation.. https://ntrs.nasa.gov/citations/19720057207
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