Markus Pichler, Andreas Stelzer, Peter Gulden, Claus Seisenberger, Martin Vossiek,
"Phase-error-measurement and -compensation in PLL frequency-synthesizers for FMCW sensors - Part II: Theory"
, in IEEE Circuits and Systems Society, in IEEE Trans. on Circuits and Systems, IEEE-CAS, Vol. 54, Nummer 6, Seite(n) 1124 - 1235, 6-2007, ISSN: 1549-8328
Original Titel:
Phase-error-measurement and -compensation in PLL frequency-synthesizers for FMCW sensors - Part II: Theory
Sprache des Titels:
Englisch
Original Kurzfassung:
Synthesizers for the generation of frequency- or phase-modulated signals are required in communications, sensing, and many other fields and applications. The widespread use of phase-locked loops (PLLs) as major building blocks in current systems requires accurate models and methods for eliminating the influence of statistical and deterministic errors in the synthesized signals. We propose a novel iterative phase-error-measurement and -compensation procedure applicable in PLL-based synthesizers, for which the mathematical background is presented, and a detailed algorithmic description is given in this work. From a mathematical PLL system model and its response to a periodic excitation by the modulating signal, a method for measuring the instantaneous output signal phase and the actual transfer function of the PLL is derived. It is shown how this knowledge can advantageously be used for pre-distorting the synthesizer input signal to eliminate deterministic errors and to obtain an accurate output phase curve.
Forschungs-