Performance analysis of fractional-order digital phase-locked loops

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Abstract

A new type of fractional-order digital phase-locked loops (FoDPLLs) is proposed. They comprise a fractional-order digital controlled oscillator (FoDCO) and a new form of fractional-order filters (FoF). The FoDPLLs are obtained by discretizing the continuous fractional differential operators using a closed-form solution. These operators generate biquadratic rational z-transfer functions, which yield robust and stable 4th-order FoDPLLs. This represents a significant order reduction over other discretization methods. The proposed operators reduce the design of the FoDPLLs to selecting only four parameters; the loop gain, the filter time constant, and the orders of both the FoF and the FoDCO. The performances of the analog and digital phase-locked loops are thoroughly investigated and illustrated via several numerical examples.

Original languageBritish English
Title of host publication2014 International Conference on Fractional Differentiation and Its Applications, ICFDA 2014
EditorsDumitru Baleanu, J.A. Tenreiro Machado
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479925919
DOIs
StatePublished - 25 Nov 2014
Event2014 International Conference on Fractional Differentiation and Its Applications, ICFDA 2014 - Catania, Italy
Duration: 23 Jun 201425 Jun 2014

Publication series

Name2014 International Conference on Fractional Differentiation and Its Applications, ICFDA 2014

Conference

Conference2014 International Conference on Fractional Differentiation and Its Applications, ICFDA 2014
Country/TerritoryItaly
CityCatania
Period23/06/1425/06/14

Keywords

  • Digital-Phase Locked Loop
  • Discretization
  • Fractional Calculus
  • Fractional-Order
  • Phase-Locked Loop
  • Stability

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