Integrated Phase-Locking Scheme for SDFT-Based Harmonic Analysis of Periodic Signals

Integrated Phase-Locking Scheme for SDFT-Based Harmonic Analysis of Periodic Signals

The sliding discrete Fourier transform splits periodic signals into selected harmonic components, as on-line time functions. Ordinarily, the sampling frequency is equal to the product of the nominal signal frequency and the window width N. However, when the signal frequency drifts, to avoid the phas...

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Veröffentlicht in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2008-01, Vol.55 (1), p.51-55
Hauptverfasser: Sumathi, P., Janakiraman, P.A.
Format: Artikel
Sprache:eng
Schlagworte:
Circuits
Discrete Fourier transforms
Finite impulse response filter
Fourier analysis
Fourier transforms
Frequency drift
Frequency estimation
Harmonic analysis
Locks
On-line systems
phase error
Phase locked loops
phase-locked loop (PLL)
Power harmonic filters
Resonator filters
Sampling
Sampling methods
Signal design
sliding discrete Fourier transform (SDFT)
Steady-state
Time functions
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Beschreibung
Zusammenfassung:The sliding discrete Fourier transform splits periodic signals into selected harmonic components, as on-line time functions. Ordinarily, the sampling frequency is equal to the product of the nominal signal frequency and the window width N. However, when the signal frequency drifts, to avoid the phase and magnitude errors, the sampling frequency can be adaptively adjusted using the phase-error itself. An integrated phase-locked loop scheme and its parameters like hold-in, pull-in ranges, lock time, steady-state
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2007.907854