Steady-state phase error for a phase-locked loop subjected to periodic Doppler inputs
- Author
- Chen, C.-C.
- Published
- Feb 15, 1991.
- Physical Description
- 1 electronic document
- Additional Creators
- Win, M. Z.
Online Version
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- Restrictions on Access
- Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access - Summary
- The performance of a carrier phase locked loop (PLL) driven by a periodic Doppler input is studied. By expanding the Doppler input into a Fourier series and applying the linearized PLL approximations, it is easy to show that, for periodic frequency disturbances, the resulting steady state phase error is also periodic. Compared to the method of expanding frequency excursion into a power series, the Fourier expansion method can be used to predict the maximum phase error excursion for a periodic Doppler input. For systems with a large Doppler rate fluctuation, such as an optical transponder aboard an Earth orbiting spacecraft, the method can be applied to test whether a lower order tracking loop can provide satisfactory tracking and thereby save the effect of a higher order loop design.
- Other Subject(s)
- Collection
- NASA Technical Reports Server (NTRS) Collection.
- Note
- Document ID: 19910009001.
Accession ID: 91N18314.
The Telecommunications and Data Acquisition Report; p 68-73. - Terms of Use and Reproduction
- No Copyright.
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