Effects of impulsive noise on phase-locked loop FM demodulator
Abstract
The effects of impulsive noise on phase-locked loop (PLL) FM demodulators is investigated. The PLL FM demodulator used for the experiments is basically a second order loop employing an active filter. The impulsive noise used for this work is ignition noise. Impulse response of the receiver is investigated and the PLL FM demodulator is digitally simulated. The response of the receiver employing the PLL FM demodulator used in the ground terminal to an input signal consisting of unmodulated carrier and impulses is investigated experimentally. The system margin is found to be degraded by about 10 dB.
- Publication:
-
IEEE Transactions on Electromagnetic Compatibility
- Pub Date:
- May 1975
- Bibcode:
- 1975ITElC..17...65O
- Keywords:
-
- Demodulators;
- Electromagnetic Noise;
- Frequency Modulation;
- Phase Locked Systems;
- Signal Reception;
- Carrier Waves;
- Digital Simulation;
- Electric Ignition;
- Feedback Control;
- Impulses;
- Intermediate Frequencies;
- Waveforms;
- Communications and Radar