Computer Science – Performance
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.340..337m&link_type=abstract
In ESA, Frequency and Time Forum p 337-341 (SEE N93-24978 09-70)
Computer Science
Performance
Controllers, Frequency Control, Loran C, Maximum Entropy Method, Phase Control, Phase Locked Systems, Atomic Clocks, Crystal Oscillators, Performance Tests, Receivers, Signal Processing
Scientific paper
The application of the Maximum Entropy Method (MEM) to control phase locked crystals of Loran C receivers is reported. Performance optimization of the MEM controller achieved the result of 9 ns and 7 x 10(exp -12) for phase and frequency residuals, respectively. These values are comparable with 100 ns and 9 x 10(exp -12) of the older conventional PI controller, respectively. The performance of the MEM controlled Loran C receiver is at least 50 percent better when compared with the identical receiver equipped with the PI controller. The results verify the presumed superiority of the MEM controller over the conventional PI.
Kalliomaeki Kalevi
Mannermaa Jari
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