Unbiased FIR Estimates vs. the Sawtooth-Corrected GPS-Based Measurements: Experimental Evaluation
Abstract
We show that, owing to small noise and smoothed excursions, the unbiased FIR filtering algorithm produces more accurate estimates of the TIE model of a local clock than the sawtooth-less GPS-based measurements. The algorithm becomes much more efficient in estimating the fractional frequency offset and higher order states. For the algorithm to work with minimum errors, the optimal time step Tau(sub opt) and number of the points in the average N(sub opt) must be ascertained in the sense of the minimum mean-square error (MSE) for each of the clock states. The relevant dependencies of N(sub opt) on Tau(sub opt) are found experimentally for a crystal clock. The trade-off between the estimates and sawtooth-less measurements is illustrated graphically.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2007
- Accession Number
- ADA474266
Entities
People
- J. Munoz-diaz
- L. Arceo-miquel
- O. Ibarro-manzano
- Y. S. Shmaliy
Organizations
- Universidad de Guanajuato