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Friday, July 17, 2020 | History

2 edition of Non-uniform sampling and the zero crossing distribution found in the catalog.

Non-uniform sampling and the zero crossing distribution

M. O. Al-Nuaimi

Non-uniform sampling and the zero crossing distribution

by M. O. Al-Nuaimi

  • 92 Want to read
  • 25 Currently reading

Published .
Written in English


Edition Notes

Thesis(Ph.D.) - Loughborough University of Technology 1971.

Statementby M.O. Al-Nuaimi.
ID Numbers
Open LibraryOL21584902M

Fig. 3. Voltage differences with zero-crossing method, where (a) illustrates the zero-crossing voltage difference at each sampling cell (cell ), (b) shows the corresponding distribution, and (c) presents RMS of the zero-crossing voltage difference in (a) for each cell. 0 20 40 60 80 l).   However, the non-uniform sampling intervals of the DRS4 are not revealed clearly by the DRS4 Eval V4 method because the time calculation and correction in the method involve multiple capacitor cells (e.g., ~38 cells at 5 GS/s), and the difference between cells could be averaged out as a .

  sample with zero crossing at the other samples and compute the > basically a random variable for which I do not know the distribution. My for non-uniform sampling, you have a sorta problem. you can try to fit polynomials between the points, or non-uniformly "stretch" the. frequencies imply low zero-crossing rates, there is a strong correlation between zero-crossing rate and energy distribution with frequency. A reasonable generalization is that if the zero-crossing rate is high, the speech signal is unvoiced, while if the zero-crossing rate is low, the speech signal is voiced [11]. Short-Time Energy.

Affected by high density, non-uniform, and unstructured seawater environment, fault detection of Marine Current Turbine (MCT) faces various fault features and strong interferences. To solve these problems, a harmonic analysis strategy based on zero-crossing estimation and Empirical Mode Decomposition (EMD) filter banks is proposed. First, the detection problems of rotor imbalance fault under.   However, the non-uniform sampling intervals of the DRS4 are not revealed clearly by the DRS4 Eval V4 method because the time calculation and correction in the method involves multiple capacitor cells (e.g., ~38 cells at 5 GS/s), and the difference between cells could be averaged out as a .


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Non-uniform sampling and the zero crossing distribution by M. O. Al-Nuaimi Download PDF EPUB FB2

The 20 chapters of Nonuniform Sampling: Theory and Practice contain contributions by leading researchers in nonuniform and Shannon sampling, zero crossing, and interpolation theory.

Its practical applications include NMR, seismology, speech and image coding, modulation and coding, optimal content, array processing, and digital filter design.5/5(1). The 20 chapters of Nonuniform Sampling: Theory and Practice contain contributions by leading researchers in nonuniform and Shannon sampling, zero crossing, and interpolation theory.

Its practical applications include NMR, seismology, speech and image coding, modulation and coding, optimal content, array processing, and digital filter design.

: A Unified Approach to Zero-Crossings and Nonuniform Sampling of Single and Multidimensional Signals and Systems (): Farokh A. Marvasti: BooksCited by: Non-uniform sampling and the zero crossing distribution Author: In Part I of the thesis we discuss the theoretical aspects of non-uniform sampling and assess its practical implications in the light of the above application.

The points at which a random function intersects the zero level finds many applications in applied science and Author: M.O. Al-Nuaimi. Nonuniform Sampling: Theory and Practice (Information Technology: Transmission, Processing and Storage) eBook: Marvasti, Farokh: : Kindle StoreManufacturer: Springer.

In electronics. In alternating current, the zero-crossing is the instantaneous point at which there is no voltage present. In a sine wave or other simple waveform, this normally occurs twice during each is a device for detecting the point where the voltage crosses zero in either direction.

The zero-crossing is important for systems which send digital data over AC circuits, such as. This paper proposes a new method of non-uniform sampling coding that utilizes a modified zero-crossing rate filter and a variable filter. In speech signals, the modified zero-crossing rate refers to the number of times in which the signal crosses zero in a single frame; the rate is high in noisy sections but low in sections of vocal sounds that are quasi-periodic.

These TFS results will be particularly insightful for cochlear-implant stimulation strategies that rely on the zero-crossing component of the stimulus, which closely relates to φ(t.

Adaptive zero-crossing digital phase-locked loop for packet synchronization. ZC-DPLL performs non-uniform sampling t This book represents the second edition of Gardner's widely known book.

sampling interval. We collect the zero-crossing voltage difference of each sampling cell, and plot the results in Fig. Figure 3(a)showsΔV at eachsampling cell. The voltage difference per cell is given by an average of hun-dreds of trials. Figure 3(b) presents the corresponding distribution of ΔV for the total sampling cells.

Zero Crossing Digital Phase Locked Loop with Arc Sine block (AS-ZCDPLL) is used to linearize the phase difference detection, and enhance the loop performance. The loop has faster acquisition, less steady state phase error, and wider locking range compared to the conventional ZCDPLL.

This work presents a Zero Crossing Digital Phase Locked Loop with Arc Sine block (ZCDPLL-AS). It characterizes the non-uniform distribution of the sampling time respect to the uniform one.

By considering that X c (ω) is band-limited in the range [−π/T s, π/T s], the relation between X c (ω) and X d (ω) can be determined into an arbitrary point ω 0, with 0. An external clock based on a zero-crossing detection is researched and implemented using a customized circuit.

Equal-spacing frequency sampling is, therefore, achieved in real-time. The zero-crossing detection for the beating frequency of 20 MHz is achieved.

The maximum sensing distance can reach the same length of the auxiliary interferometer. Keywords: Non-uniform Sampling, Digital Phase Locked Loops, Zero Crossing DPLL, Mobile Faded Channels. Introduction. Phase Lock Loops (PLLs) are used in a wider range of communication applications such as carrier recovery synchronization, and demodulation [1].

A PLL is a clo- sed loop system in which the phase output tracks the. (ebook) Nonuniform Sampling () from Dymocks online store. Our understanding of nature is often through nonuniform.

Australia’s leading bookseller for years. In the case of non-uniform sampling, a sufficient condition for reconstruction of band-limited signals is that the maximum of { t k +1 t k } should be less the sampling period T s.

Level crossing (LC), or event-based sampling, is a form of non-uniform sampling that can be used efficiently for bursty or sparse signals, as well as for the processing of non-stationary the LC sampling an analog signal x(t) is compared with a set of reference levels located within the dynamic range of the signal, and only when the signal exceeds one of the reference levels.

(ASDM).6,13 The ASDM (Fig. 2) is a non{linear feedback system that maps a bounded analog input signal into a binary output signal with zero{crossing times that depend on the amplitude of the signal.

It can be shown that the ASDM operation is an adaptive LC sampling scheme Moreover, using duty{cycle modulation we obtain a multi{level representation of an analog signal in terms of localized. The sampling schemes proposed are: level crossing (LC), close to extrema LC, and extrema sampling. Analysis of robustness of these schemes to jitter, and bandpass additive gaussian noise is presented.

This non-uniform sampling, achieved by narrow-band modulation of the RF instantaneous sample rate, results in a frequency domain point spread function that is between the extremes obtained by.

Swept-source OCT imaging system implemented with the real-time uniform K-space sampling method. The schematic of an SS-OCT system capable of real-time uniform K-space sampling is shown in Fig. 2. 5% of the output power from an FDML is sent to the MZI where the fringe signal is detected by a dual-balanced photo detector for external clock generation.The classical approach to A/D conversion has been uniform sampling and we get perfect reconstruction for bandlimited signals by satisfying the Nyquist Sampling Theorem.

We propose a non-uniform sampling scheme based on level crossing (LC) time information. We show stable reconstruction of bandpass signals with correct scale factor and hence a unique reconstruction from only the non-uniform. Various methods of synchronizing signals were explained by the author.

It also described the importance of time in synchronized sampling. Milos Sedlacek [29] explained in the basic concept for finding the phasor using zero crossing. The paper also mentioned that unless there is a reference signal, zero crossing phase of a signal cannot be.