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Journal articles on the topic 'Coherent sampling'

Author: Grafiati
Published: 28 June 2021
Last updated: 17 February 2022

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1

Kim, Inwoong, Cheolhwan Kim, and Guifang Li. "Requirements for the sampling source in coherent linear sampling." Optics Express 12, no. 12 (2004): 2723. http://dx.doi.org/10.1364/opex.12.002723.

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2

Kray, Stefan, Felix Spöler, Thomas Hellerer, and Heinrich Kurz. "Electronically controlled coherent linear optical sampling for optical coherence tomography." Optics Express 18, no. 10 (April 28, 2010): 9976. http://dx.doi.org/10.1364/oe.18.009976.

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3

Yang, Honglei, Shengkang Zhang, Huan Zhao, and Jun Ge. "Phase-coherent asynchronous optical sampling system." Optics Express 28, no. 24 (November 20, 2020): 37040. http://dx.doi.org/10.1364/oe.405074.

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4

Xin Chen, Xiaobo Xie, Inwoong Kim, Guifang Li, Hanyi Zhang, and Bingkun Zhou. "Coherent Detection Using Optical Time-Domain Sampling." IEEE Photonics Technology Letters 21, no. 5 (March 2009): 286–88. http://dx.doi.org/10.1109/lpt.2008.2010868.

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5

Agrež, Dušan. "Power measurement in the non-coherent sampling." Measurement 41, no. 3 (April 2008): 230–35. http://dx.doi.org/10.1016/j.measurement.2006.12.005.

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6

Chaturvedi, S. "The sampling theorem and coherent state systems." Optics and Spectroscopy 103, no. 3 (September 2007): 405–10. http://dx.doi.org/10.1134/s0030400x07090093.

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7

Avitzour, D. "SNR/bandwidth tradeoff in coherent radar sampling." IEEE Transactions on Aerospace and Electronic Systems 26, no. 2 (March 1990): 403–5. http://dx.doi.org/10.1109/7.53447.

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8

Agrez, Dusan. "Estimation of the signal component from random equivalent and non-coherent sampling measurements." ACTA IMEKO 6, no. 4 (December 28, 2017): 54. http://dx.doi.org/10.21014/acta_imeko.v6i4.474.

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Estimations of the signal component parameters in the case of random equivalent time sampling and under non-coherent sampling condition comprise two main error contributions: spectral leakage effect due to non-coherency and additional noise due to the randomization of sampling intervals. In the estimation procedure the non-parametric interpolated DFT approach has to be used first to estimate the component frequency and, after that, an iterative 4-parametric sine-fit algorithm should be used for other component parameters (amplitude and phase). Their estimations are possible when the duty ratio of random samples from the total samples in the non-coherent measurement interval is above 0.1. With these duty ratios of random samples it is possible to achieve error levels of 0.001 bins of the frequency estimations in relation to the estimation on full ensemble of points.
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9

Roberts, Lyle E., Robert L. Ward, Craig Smith, and Daniel A. Shaddock. "Coherent Beam Combining Using an Internally Sensed Optical Phased Array of Frequency-Offset Phase Locked Lasers." Photonics 7, no. 4 (November 28, 2020): 118. http://dx.doi.org/10.3390/photonics7040118.

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Coherent beam combining can be used to scale optical power and enable mechanism-free beam steering using an optical phased array. Coherently combining multiple free-running lasers in a leader-follower laser configuration is challenging due to the need to measure and stabilize large and highly dynamic phase differences between them. We present a scalable technique based on frequency-offset phase locking and digitally enhanced interferometry to clone the coherence of multiple lasers without the use of external sampling optics, which has the potential to support both coherent and spectral beam combining, and alleviates issues of voltage wrapping associated with actuating feedback control using electro-optic modulators. This technique was demonstrated experimentally using a tiled-aperture optical phased array in which the relative output phase of three free-running lasers was stabilized with an RMS output phase stability of λ/104.
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10

Tankeliun, Tomas, Oleg Zaytsev, and Vytautas Urbanavicius. "Hybrid Time-Base Device for Coherent Sampling Oscilloscope." Measurement Science Review 19, no. 3 (June 1, 2019): 93–100. http://dx.doi.org/10.2478/msr-2019-0015.

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Abstract In this paper, a hybrid time-base (HTB) device for the coherent sampling oscilloscope is presented. The HTB device makes it possible to reduce the uncertainty of determining the time position of the sample in the horizontal channel of the sampling oscilloscope. For its functioning, the proposed HTB device requires that the system-under-test, in addition to the test signal, also has a synchronous reference clock – harmonic oscillation. It should be noted that both the test signal and the harmonic reference clock are sampled simultaneously. The harmonic reference clock is connected to one of the oscilloscope channels and a special algorithm processes the clock samples and adjusts the coherent sampling mode. Two techniques of determining the position of the sample on the time axis are combined in the HTB device – the “trigonometric”, when the position is calculated by the arccosine or arcsine formula of the reference clock sampling value, and the interpolation method, according to which the time position of the sample is found by averaging the positions of two adjacent samples, obtained using said “trigonometric” technique. Primary experimental studies have shown that using the HTB device can reduce jitter of the sampling oscilloscope by several times and the drift with constant time distortion components is practically absent in this device.
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11

Zizhe Ding, Xiaodong Wang, and Xian-Da Zhang. "Sampling-Based Soft Equalization for Coherent Optical Channels." Journal of Lightwave Technology 27, no. 16 (August 2009): 3599–606. http://dx.doi.org/10.1109/jlt.2009.2024775.

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12

Barák, T., J. Bittner, and V. Havran. "Temporally Coherent Adaptive Sampling for Imperfect Shadow Maps." Computer Graphics Forum 32, no. 4 (July 2013): 87–96. http://dx.doi.org/10.1111/cgf.12154.

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13

Carbone, P., and G. Chiorboli. "ADC sinewave histogram testing with quasi-coherent sampling." IEEE Transactions on Instrumentation and Measurement 50, no. 4 (2001): 949–53. http://dx.doi.org/10.1109/19.948305.

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14

Wallace, Tim, and Ali Sekmen. "Kaczmarz Iterative Projection and Nonuniform Sampling with Complexity Estimates." Journal of Medical Engineering 2014 (December 15, 2014): 1–15. http://dx.doi.org/10.1155/2014/908984.

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Kaczmarz’s alternating projection method has been widely used for solving mostly over-determined linear system of equations Ax=b in various fields of engineering, medical imaging, and computational science. Because of its simple iterative nature with light computation, this method was successfully applied in computerized tomography. Since tomography generates a matrix A with highly coherent rows, randomized Kaczmarz algorithm is expected to provide faster convergence as it picks a row for each iteration at random, based on a certain probability distribution. Since Kaczmarz’s method is a subspace projection method, the convergence rate for simple Kaczmarz algorithm was developed in terms of subspace angles. This paper provides analyses of simple and randomized Kaczmarz algorithms and explains the link between them. New versions of randomization are proposed that may speed up convergence in the presence of nonuniform sampling, which is common in tomography applications. It is anticipated that proper understanding of sampling and coherence with respect to convergence and noise can improve future systems to reduce the cumulative radiation exposures to the patient. Quantitative simulations of convergence rates and relative algorithm benchmarks have been produced to illustrate the effects of measurement coherency and algorithm performance, respectively, under various conditions in a real-time kernel.
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15

Patil, G. P., A. K. Sinha, and C. Taillie. "Ranked set sampling, coherent rankings and size-biased permutations." Journal of Statistical Planning and Inference 63, no. 2 (October 1997): 311–24. http://dx.doi.org/10.1016/s0378-3758(97)00030-x.

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16

Popescu, Voicu, Bedrich Benes, Paul Rosen, Jian Cui, and Lili Wang. "A Flexible Pinhole Camera Model for Coherent Nonuniform Sampling." IEEE Computer Graphics and Applications 34, no. 4 (July 2014): 30–41. http://dx.doi.org/10.1109/mcg.2014.21.

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17

Merino, Sandro, and Mark A. Nyfeler. "Applying importance sampling for estimating coherent credit risk contributions." Quantitative Finance 4, no. 2 (April 2004): 199–207. http://dx.doi.org/10.1080/14697680400000024.

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18

Bernard, Florent, Viktor Fischer, and Boyan Valtchanov. "Mathematical model of physical RNGs based on coherent sampling." Tatra Mountains Mathematical Publications 45, no. 1 (December 1, 2010): 1–14. http://dx.doi.org/10.2478/v10127-010-0001-1.

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ABSTRACT Random number generators represent one of basic cryptographic primitives used in creating cryptographic protocols. Their security evaluation represents very important part in the design, implementation and employment phase of the generator. One of important security requirements is the existence of a mathematical model describing the physical noise source and the statistical properties of the digitized noise derived from it. The aim of this paper is to propose the model of a class of generators using two jittery clocks with rationally related frequencies. The clock signals with related frequencies can be obtained using phase-locked loops, delay-locked loops or ring oscillators with adjusted oscillation periods. The proposed mathematical model is used to provide entropy per bit estimators and expected bias on the generated sequence. The model is validated by hardware experiments.
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19

Coddington, I., W. C. Swann, and N. R. Newbury. "Coherent linear optical sampling at 15 bits of resolution." Optics Letters 34, no. 14 (July 9, 2009): 2153. http://dx.doi.org/10.1364/ol.34.002153.

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20

Vaisman, Radislav, Dirk P. Kroese, and Ilya B. Gertsbakh. "Improved Sampling Plans for Combinatorial Invariants of Coherent Systems." IEEE Transactions on Reliability 65, no. 1 (March 2016): 410–24. http://dx.doi.org/10.1109/tr.2015.2446471.

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21

Shalashilin, Dmitrii V., and Mark S. Child. "Basis set sampling in the method of coupled coherent states: Coherent state swarms, trains, and pancakes." Journal of Chemical Physics 128, no. 5 (February 7, 2008): 054102. http://dx.doi.org/10.1063/1.2828509.

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22

Sakamoto, Takahide, Guo-Wei Lu, and Naokatsu Yamamoto. "Loop-Assisted Coherent Matched Detector for Parallel Time-Frequency Sampling." Journal of Lightwave Technology 35, no. 4 (February 15, 2017): 807–14. http://dx.doi.org/10.1109/jlt.2016.2645224.

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23

Yu, F. T. S., and Y. W. Zhang. "Fringe visibility of dual-aperture sampling with partially coherent illumination." Applied Optics 25, no. 18 (September 15, 1986): 3191. http://dx.doi.org/10.1364/ao.25.003191.

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24

Arvind, S. Chaturvedi, N. Mukunda, and R. Simon. "The sampling theorem and coherent state systems in quantum mechanics." Physica Scripta 74, no. 2 (July 19, 2006): 168–79. http://dx.doi.org/10.1088/0031-8949/74/2/004.

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25

Bakopoulos, Paraskevas, Stefanos Dris, Bernhard Schrenk, Ioannis Lazarou, and Hercules Avramopoulos. "Bandpass sampling in heterodyne receivers for coherent optical access networks." Optics Express 20, no. 28 (December 19, 2012): 29404. http://dx.doi.org/10.1364/oe.20.029404.

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26

Fischer, J. K., R. Ludwig, L. Molle, C. Schmidt-Langhorst, C. C. Leonhardt, A. Matiss, and C. Schubert. "High-Speed Digital Coherent Receiver Based on Parallel Optical Sampling." Journal of Lightwave Technology 29, no. 4 (February 2011): 378–85. http://dx.doi.org/10.1109/jlt.2010.2090132.

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27

Guo, Cheng-Shan, Kun Liang, Xin-Ting Zhang, and Hui-Tian Wang. "Real-time coherent diffractive imaging with convolution-solvable sampling array." Optics Letters 35, no. 6 (March 15, 2010): 850. http://dx.doi.org/10.1364/ol.35.000850.

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28

Gavish, Matan, and Ronald R. Coifman. "Sampling, denoising and compression of matrices by coherent matrix organization." Applied and Computational Harmonic Analysis 33, no. 3 (November 2012): 354–69. http://dx.doi.org/10.1016/j.acha.2012.02.001.

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29

Tang, Zijian, and Xander Campman. "Acquisition and separation of coherent simultaneous sources: Theory and an application to data acquired in the Sultanate of Oman." GEOPHYSICS 84, no. 1 (January 1, 2019): V55—V66. http://dx.doi.org/10.1190/geo2017-0613.1.

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In an effort to reduce acquisition costs or increase (source) sampling density, we have developed a coherent simultaneous-source scheme. Different from most existing simultaneous acquisition, our scheme enforces the received signal to remain coherent in all sorting domains, thus even in the common-receiver domain. A major benefit of the enforced signal coherency is that it enables multidomain preprocessing prior to source separation. At the same time, it poses a challenge to the source separation itself. Based on the observation that the proposed coherent simultaneous-source scheme is equivalent to the traditional source array, we have developed a novel source separation method that comprises (1) interpolating the observed signal in the space domain and (2) removing the source-array effect. In practice, the source-array effect cannot perfectly be removed in the presence of notches. This fact can, however, be deliberately leveraged for noise attenuation.
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30

Nahata, Ajay, David H. Auston, Tony F. Heinz, and Chengjiu Wu. "Coherent detection of freely propagating terahertz radiation by electro‐optic sampling." Applied Physics Letters 68, no. 2 (January 8, 1996): 150–52. http://dx.doi.org/10.1063/1.116130.

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31

Takizawa, Shigekazu, Kotaro Hiramatsu, and Keisuke Goda. "Compressed time-domain coherent Raman spectroscopy with real-time random sampling." Vibrational Spectroscopy 107 (March 2020): 103042. http://dx.doi.org/10.1016/j.vibspec.2020.103042.

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32

Zhuang, Yuming, and Degang Chen. "Accurate Spectral Testing With Non-Coherent Sampling for Multi-Tone Test." IEEE Transactions on Circuits and Systems II: Express Briefs 64, no. 12 (December 2017): 1357–61. http://dx.doi.org/10.1109/tcsii.2017.2740937.

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33

Masia, Francesco, Paola Borri, and Wolfgang Langbein. "Sparse sampling for fast hyperspectral coherent anti-Stokes Raman scattering imaging." Optics Express 22, no. 4 (February 13, 2014): 4021. http://dx.doi.org/10.1364/oe.22.004021.

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34

Cao, Minghua, Jianqiang Li, Yitang Dai, Feifei Yin, and Kun Xu. "Multiband Phase-Modulated RoF Link With Coherent Detection and Bandpass Sampling." IEEE Photonics Technology Letters 27, no. 21 (November 1, 2015): 2308–11. http://dx.doi.org/10.1109/lpt.2015.2462087.

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35

Lawson, Kevin L., Fred W. Huffer, and Hani Doss. "Bayesian nonparametric estimation via Gibbs sampling for coherent systems with redundancy." Annals of Statistics 25, no. 3 (June 1997): 1109–39. http://dx.doi.org/10.1214/aos/1069362740.

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36

Göbel, T., D. Schoenherr, C. Sydlo, M. Feiginov, P. Meissner, and H. L. Hartnagel. "Single-sampling-point coherent detection in continuous-wave photomixing terahertz systems." Electronics Letters 45, no. 1 (2009): 65. http://dx.doi.org/10.1049/el:20093086.

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37

Hudert, F., A. Bartels, C. Janke, T. Dekorsy, and K. Köhler. "Coherent acoustic phonons in phonon cavities investigated by asynchronous optical sampling." Journal of Physics: Conference Series 92 (December 1, 2007): 012012. http://dx.doi.org/10.1088/1742-6596/92/1/012012.

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38

WEI, GongXiang, XinTing ZHANG, ChengShan GUO, and ShengGui FU. "Noniterative real-time coherent diffraction imaging by period sampling aperture array." SCIENTIA SINICA Physica, Mechanica & Astronomica 42, no. 5 (April 1, 2012): 452–57. http://dx.doi.org/10.1360/132011-776.

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39

Öztürk, Hande, Hanfei Yan, John P. Hill, and Ismail C. Noyan. "Sampling statistics of diffraction from nanoparticle powder aggregates." Journal of Applied Crystallography 47, no. 3 (May 29, 2014): 1016–25. http://dx.doi.org/10.1107/s1600576714008528.

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In this study, the sampling statistics of X-ray diffraction data obtained from polycrystalline nanopowders are studied through analytical formulations and numerical modelling. It is shown that the very large acceptance angles of crystalline nanoparticles can cause issues in computing the number of diffracting grains scattering into a given Bragg reflection. These results intimate that formulations previously tested and verified for polycrystalline aggregates with grains larger than 500 nm should be revalidated for particles with coherent scattering lengths below 10 nm.
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40

Wang, Fanggang, and Xiaodong Wang. "Coherent Optical DFT-Spread OFDM." Advances in Optical Technologies 2011 (March 31, 2011): 1–4. http://dx.doi.org/10.1155/2011/689289.

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We consider application of the discrete Fourier transform-spread orthogonal frequency-division multiplexing (DFT-spread OFDM) technique to high-speed fiber optic communications. The DFT-spread OFDM is a form of single-carrier technique that possesses almost all advantages of the multicarrier OFDM technique (such as high spectral efficiency, flexible bandwidth allocation, low sampling rate, and low-complexity equalization). In particular, we consider the optical DFT-spread OFDM system with polarization division multiplexing (PDM) that employs a tone-by-tone linear minimum mean square error (MMSE) equalizer. We show that such a system offers a much lower peak-to-average power ratio (PAPR) performance as well as better bit error rate (BER) performance compared with the optical OFDM system that employs amplitude clipping.
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41

Lin, Qianqiang, Zeng Ping Chen, Yue Zhang, and Jianzhi Lin. "COHERENT PHASE COMPENSATION METHOD BASED ON DIRECT IF SAMPLING IN WIDEBAND RADAR." Progress In Electromagnetics Research 136 (2013): 753–64. http://dx.doi.org/10.2528/pier12122203.

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42

Wu, Minshun, Guican Chen, and Degang Chen. "ADC jitter estimation using a single frequency test without requiring coherent sampling." IEICE Electronics Express 9, no. 18 (2012): 1485–91. http://dx.doi.org/10.1587/elex.9.1485.

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43

Geng, Zihan, Deming Kong, Bill Corcoran, Pengyu Guan, Francesco Da Ros, Edson Porto da Silva, Leif Katsuo Oxenløwe, and Arthur James Lowery. "All-optical OFDM demultiplexing with optical partial Fourier transform and coherent sampling." Optics Letters 44, no. 2 (January 15, 2019): 443. http://dx.doi.org/10.1364/ol.44.000443.

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44

Cao, Minghua, Jianqiang Li, Jian Dai, Yitang Dai, Feifei Yin, Yue Zhou, and Kun Xu. "Photonic aided bandpass sampling in coherent phase modulated radio-over-fiber links." Optics Communications 368 (June 2016): 160–64. http://dx.doi.org/10.1016/j.optcom.2016.02.015.

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45

Rossi, Nicola, Paolo Serena, and Alberto Bononi. "Stratified-Sampling Estimation of PDL-Induced Outage Probability in Nonlinear Coherent Systems." Journal of Lightwave Technology 32, no. 24 (December 15, 2014): 4905–11. http://dx.doi.org/10.1109/jlt.2014.2366921.

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46

Wabnitz, Stefan. "Importance Sampling Analysis of PMD Outages in PDM-QPSK Coherent Nonlinear Transmissions." IEEE Photonics Technology Letters 25, no. 3 (February 2013): 264–67. http://dx.doi.org/10.1109/lpt.2012.2234097.

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47

Dekorsy, T., R. Taubert, F. Hudert, G. Schrenk, A. Bartels, R. Cerna, V. Kotaidis, et al. "High-speed asynchronous optical sampling for high-sensitivity detection of coherent phonons." Journal of Physics: Conference Series 92 (December 1, 2007): 012005. http://dx.doi.org/10.1088/1742-6596/92/1/012005.

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48

Turner, B. J., and M. Y. Leclerc. "Conditional Sampling of Coherent Structures in Atmospheric Turbulence Using the Wavelet Transform." Journal of Atmospheric and Oceanic Technology 11, no. 1 (February 1994): 205–9. http://dx.doi.org/10.1175/1520-0426(1994)011<0205:csocsi>2.0.co;2.

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49

Zhuang, Yuming, and Degang Chen. "ADC Spectral Testing with Signal Amplitude Drift and Simultaneous Non-coherent Sampling." Journal of Electronic Testing 33, no. 3 (January 26, 2017): 305–13. http://dx.doi.org/10.1007/s10836-017-5642-4.

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50

Wu, Minshun, Yue Lin, Jiangtao Xu, and Zhiqiang Liu. "Efficient algorithm for multi-tone spectral test of ADCs without requiring coherent sampling." IEICE Electronics Express 13, no. 21 (2016): 20160784. http://dx.doi.org/10.1587/elex.13.20160784.

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