Title :
Integrated Phase-Locking Scheme for SDFT-Based Harmonic Analysis of Periodic Signals
Author :
Sumathi, P. ; Janakiraman, Panappakkam Arumugam
Author_Institution :
Indian Inst. of Technol., Chennai
Abstract :
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
Keywords :
discrete Fourier transforms; harmonic analysis; phase locked loops; signal processing; frequency drift; integrated phase-locking; periodic signal harmonic analysis; phase-locked loop; sampling frequency; sliding discrete Fourier transform; Discrete Fourier transforms; Finite impulse response filter; Frequency estimation; Harmonic analysis; Phase locked loops; Power harmonic filters; Resonator filters; Sampling methods; Signal design; Steady-state; Frequency drift; harmonic analysis; phase error; phase-locked loop (PLL); sliding discrete Fourier transform (SDFT);
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2007.907854
