Fuzzy phase-locked loops

Author

Simon, Dan ; El-Sherief, Hossny

Author_Institution

Syst. Integration Group, TRW Inc., San Bernardino, CA, USA

fYear

1994

fDate

11-15 Apr 1994

Firstpage

252

Lastpage

259

Abstract

The problem of robust phase-locked loop (PLL) design has attracted attention for many years, particularly since the advent of the Global Positioning System. This paper proposes and demonstrates the use of a fuzzy PLL to estimate the time-varying phase of a sinusoidal signal. It is shown via simulation results that fuzzy PLLs offer performance comparable to analytically derived PLLs (e.g., Kalman filters and H_∞ estimators) when the phase exhibits high dynamics and high noise. The fuzzy PLL rules are optimized using a gradient descent method and a genetic algorithm

Keywords

fuzzy set theory; genetic algorithms; numerical analysis; parameter estimation; phase-locked loops; radionavigation; satellite relay systems; Global Positioning System; fuzzy PLL; fuzzy phase-locked loops; genetic algorithm; gradient descent method; high dynamics; high noise; performance; robust PLL design; simulation results; sinusoidal signal; time-varying phase; Control systems; Frequency estimation; Fuzzy control; Fuzzy systems; Global Positioning System; Phase estimation; Phase locked loops; Phase noise; Robustness; Satellites;

fLanguage

English

Publisher

ieee

Conference_Titel

Position Location and Navigation Symposium, 1994., IEEE

Conference_Location

Las Vegas, NV

Print_ISBN

0-7803-1435-2

Type

conf

DOI

10.1109/PLANS.1994.303321

Filename

303321