Digital spectra of nonuniformly sampled signals. II. Digital look-up tunable sinusoidal oscillators

Jenq, Yih-Chyun

doi:10.1109/19.7455

Cited by 73 publications

(29 citation statements)

References 1 publication

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“…One of the techniques of performing a perfect reconstruction of a band-limited signal from its unevenly sampled data points has been proposed by Jenq [34,35,36]. This method shows that if the average sampling rate is greater than the half of the maximum frequency component of the signal, then the signal can be perfectly reconstructed.…”

Section: Estimation In Terms Of the Analog Frequencymentioning

confidence: 99%

Coherent Processing Across Multiple Staggered Pulse Repetition Interval (PRI) Dwells in Radar

Sarkar¹,

Koh²

2004

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Section: Estimation In Terms Of the Analog Frequencymentioning

confidence: 99%

Coherent Processing Across Multiple Staggered Pulse Repetition Interval (PRI) Dwells in Radar

Sarkar¹,

Koh²

2004

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“…As shown by Jenq [2], each side-band/harmonic is separated by Hz. Thus the frequency of the kth harmonic may be written as (8) where is an integer for subharmonic frequency components (9) Combining (1), (3), (8), and (9) (10) The condition for at least one frequency component to be below the fundamental is therefore (11) For given values of , and N (3) can be used to calculate values of M, W, and L. Subharmonics occur if the inequality given in (11) holds true.…”

Section: ) Sufficient Condition For the Occurrence Of Subharmonicsmentioning

confidence: 99%

“…denotes the amplitudes of various frequency components. A mathematical derivation describing SNR as a function of and was provided by Jenq in [2]. The formula has been modified to accommodate TD instead of SNR to measure the quality of the signal (5) where (6) is the amplitude of the fundamental component.…”

Section: B Analysing the Non-uniform Sampling Effectmentioning

confidence: 99%

“…This would produce a sine wave of fundamental frequency (1) The maximum value of this is bounded by , which is the limit of to avoid aliasing. The synthesized waveform is a set of discrete values, given by (2) Note that although is in general a real number, the actual table index used must be an integer.…”

Section: Digital Reference Waveform Synthesismentioning

confidence: 99%

“…It is also noted that this problem has been adequately dealt with in precision waveform synthesis with application to communications, acoustics and speech recognition [2]- [4]. However the implications of this in the context of inverter power quality have not been investigated.…”

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confidence: 99%

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Elimination of subharmonics in direct look-up table (DLT) sine wave reference generators for low-cost microprocessor-controlled inverters

Abeyasekera

Johnson

Atkinson

et al. 2003

IEEE Trans. Power Electron.

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Abstract-This paper investigates distortion of an inverter reference waveform generated using a direct look-up (DLT) algorithm. The sources of various distortion components are identified and the implications for application to variable speed drives and grid connected inverters are described. Harmonic and subharmonic distortion mechanisms are analyzed, and compared with experimental results. Analytical methods are derived to determine the occurrence of subharmonics, their number, frequencies and maximum amplitudes. A relationship is established identifying a discrete set of synthesizable frequencies which avoid sub-harmonic distortion as a function of look-up table length and a practical method for calculation of the look-up table indices, based on finite length binary representation, is presented. Real time experimental results are presented to verify the analytical derivations.

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Digital‐To‐Frequency Converter

Xiu¹

2012

Nanometer Frequency Synthesis Beyond the Phase‐Locked Loop

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Digital spectra of nonuniformly sampled signals. II. Digital look-up tunable sinusoidal oscillators

Cited by 73 publications

References 1 publication

Coherent Processing Across Multiple Staggered Pulse Repetition Interval (PRI) Dwells in Radar

Coherent Processing Across Multiple Staggered Pulse Repetition Interval (PRI) Dwells in Radar

Elimination of subharmonics in direct look-up table (DLT) sine wave reference generators for low-cost microprocessor-controlled inverters

Digital‐To‐Frequency Converter

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