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1. Tzou, Nicholas. Low-cost sub-Nyquist sampling hardware and algorithm co-design for wideband and high-speed signal characterization and measurement.

Degree: PhD, Electrical and Computer Engineering, 2014, Georgia Tech

Cost reduction has been and will continue to be a primary driving force in the evolution of hardware design and associated technologies. The objective of this research is to design low-cost signal acquisition systems for characterizing wideband and high-speed signals. As the bandwidth and the speed of such signals increase, the cost of testing also increases significantly; therefore, innovative hardware and algorithm co-design are needed to relieve this problem. In Chapter 2, a low-cost multi-rate system is proposed for characterizing the spectra of wideband signals. The design is low-cost in the sense of the actual component cost, the system complexity, and the effort required for calibration. The associated algorithms are designed such that the hardware can be implemented with low-complexity yet be robust enough to deal with various hardware variations. A hardware prototype is built not only to verify the proposed hardware scheme and algorithms but to serve as a concrete example that shows that characterizing signals with sub-Nyqusit sampling rate is feasible. Chapter 3 introduces a low-cost time-domain waveform reconstruction technique, which requires no mutual synchronization mechanisms. This brings down cost significantly and enables the implementation of systems capable of capturing tens of Gigahertz (GHz) signals for significantly lower cost than high-end oscilloscopes found in the market today. For the first time, band-interleaving and incoherent undersampling techniques are combined to form a low-cost solution for waveform reconstruction. This is enabled by co-designing the hardware and the back-end signal processing algorithms to compensate for the lack of coherent Nyquist rate sampling hardware. A hardware prototype was built to support this work. Chapter 4 describes a novel test methodology that significantly reduces the required time for crosstalk jitter characterization in parallel channels. This is done by using bit patterns with coprime periods as channel stimuli and using signal processing algorithms to separate multiple crosstalk coupling effects. This proposed test methodology can be applied seamlessly in conjunction with the current test methodology without re-designing the test setup. More importantly, the conclusion derived from the mathematical analysis shows that only such test stimuli give unbiased characterization results, which are critical in all high-precision test setups. Hardware measurement results and analysis are provided to support this methodology. This thesis starts with an overview of the background and a literature review. Three major previously mentioned works are addressed in three separate chapters. Each chapter documents the hardware designs, signal processing algorithms, and associated mathematical analyses. For the purpose of verification, the hardware measurement setups and results are discussed at the end of these three chapters. The last chapter presents conclusions and future directions for work from this thesis. Advisors/Committee Members: Chatterjee, Abhijit (advisor), Davenport, Mark (committee member), Keezer, David (committee member), Swaminathan, Madhavan (committee member), Song, Le (committee member).

Subjects/Keywords: Low-cost; Sub-Nyquist; Algorithm; Hardware; Measurement; Multi-rate; Band-interleaved; Undersampling; Jitter; Crosstalk separation; Broadband communication systems Equipment and supplies; Algorithms

…tone Signal Down-Conversion 67 Figure 3.9: Band-interleaved underampling block diagram 67… …Proposed band-interleaved incoherent undersampling architecture 72 Figure 3.12: Upper-band… …ADC to increase the analog input bandwidth. One drawback of the band-interleaved scheme is… …related advancements. Section 3.2 applies the band-interleaved scheme to incoherent… …equipment. 1.4.2 Extend the Bandwidth of Oscilloscopes Band-interleaved schemes have been used to… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Tzou, N. (2014). Low-cost sub-Nyquist sampling hardware and algorithm co-design for wideband and high-speed signal characterization and measurement. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/51876

Chicago Manual of Style (16th Edition):

Tzou, Nicholas. “Low-cost sub-Nyquist sampling hardware and algorithm co-design for wideband and high-speed signal characterization and measurement.” 2014. Doctoral Dissertation, Georgia Tech. Accessed August 25, 2019. http://hdl.handle.net/1853/51876.

MLA Handbook (7th Edition):

Tzou, Nicholas. “Low-cost sub-Nyquist sampling hardware and algorithm co-design for wideband and high-speed signal characterization and measurement.” 2014. Web. 25 Aug 2019.

Vancouver:

Tzou N. Low-cost sub-Nyquist sampling hardware and algorithm co-design for wideband and high-speed signal characterization and measurement. [Internet] [Doctoral dissertation]. Georgia Tech; 2014. [cited 2019 Aug 25]. Available from: http://hdl.handle.net/1853/51876.

Council of Science Editors:

Tzou N. Low-cost sub-Nyquist sampling hardware and algorithm co-design for wideband and high-speed signal characterization and measurement. [Doctoral Dissertation]. Georgia Tech; 2014. Available from: http://hdl.handle.net/1853/51876


INP Toulouse

2. Brandelero, Julio Cezar. Conception et réalisation d'un convertisseur multicellulaire DC/DC isolé pour application aéronautique : Design and development of an isolated multicell DC/DC power converter for aeronautical applications.

Degree: Docteur es, Génie électrique, 2015, INP Toulouse

L’électricité prend une place de plus en plus importante dans les systèmes énergétiques embarqués. L’électricité est une forme d’énergie très malléable, facile à transporter et réglable ou transformable avec un très faible taux de pertes. L’énergie électrique, associée à des convertisseurs statiques, est plus facile à maîtriser que, par exemple, l’énergie hydraulique et/ou pneumatique, permettant un réglage plus fin et une réduction des coûts de maintenance. L’évolution de la puissance dans les modèles avioniques est marquante. Avec le nombre croissant de charges électroniques, un avion plus électrique avec un réseau à courant alternatif inclurait un grand nombre de redresseurs AC/DC qui devront respecter les normes de qualité secteur. Une solution pour la réduction de la masse serait de préférer un réseau HVDC (High Voltage DC Bus). Sur les futurs modèles avioniques plus électriques, les concepteurs envisageront des conversions HVDC/DC à partir de l’unité appelée BBCU (Buck Boost Converter Unit). Dans ce cas d’étude, un réseau de distribution en tension continue (±270Vdc) est connecté à un réseau de sécurité basse tension (28Vdc) avec un échange bidirectionnel de puissance pouvant atteindre 10kW. Le convertisseur statique assurant cette liaison représente de nouveaux défis pour l’électronique de puissance en termes de fiabilité, sûreté, détection de panne, rendement et réduction de masse et de coût. Le dimensionnement du convertisseur doit prendre en compte une conception optimale, en aéronautique ce critère est la masse. Dans le processus de dimensionnement et d’optimisation du convertisseur, il est donc impératif de prendre en compte trois facteurs principaux : 1) l’évolution des topologies de conversion, 2) l’évolution des composants actifs et passifs et 3) l’intégration de puissance. La réunion de ces trois facteurs permettra ainsi la miniaturisation des convertisseurs statiques. Dans un premier temps, nous préciserons la démarche adoptée pour le dimensionnement d’un convertisseur en prenant en compte : les topologies actives, les filtres différentiels et le système de refroidissement. Les différents éléments qui composent le convertisseur sont décrits dans un langage informatique orienté objet. Des facteurs de performances seront également introduits afin de faciliter le choix des semi-conducteurs, des condensateurs et du dissipateur pour un convertisseur statique. Dans un deuxième temps, nous présenterons le fonctionnement d’une topologie multicellulaire DC/DC, isolée pour l’application proposée. Nous présenterons les avantages du couplage de différentes phases de ce convertisseur. Nous introduirons les différentes associations des cellules et leurs avantages, possibles grâce à l’isolement, comme la mise en série et en parallèle. Puisque la caractérisation des pertes des semi-conducteurs est essentielle pour le dimensionnement du convertisseur statique, nous proposerons deux approches : un modèle de simulation relativement simple et paramétré à l’aide de seules notices constructeurs ; et une méthode de mesure… Advisors/Committee Members: Meynard, Thierry (thesis director).

Subjects/Keywords: Convertisseurs DC/DC Isolé; Convertisseurs Multiniveaux; Méthode d’opposition; Mesure de pertes de commutation; Composants à large bande interdite; SiC; GaN; Avion plus électrique; Dimensionnement de convertisseurs statiques; Transformateurs InterCellulaire (ICT); Convertisseurs Entrelacés; Isolated DC/DC power converter; Multilevel converters; Losses measurements; Wide Band-Gap; SiC; GaN; More electric aircraft; Power converter sizing; Isolated Inter-Cell transformer (Isolated ICT); Interleaved power converters; Opposition method

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Brandelero, J. C. (2015). Conception et réalisation d'un convertisseur multicellulaire DC/DC isolé pour application aéronautique : Design and development of an isolated multicell DC/DC power converter for aeronautical applications. (Doctoral Dissertation). INP Toulouse. Retrieved from http://www.theses.fr/2015INPT0042

Chicago Manual of Style (16th Edition):

Brandelero, Julio Cezar. “Conception et réalisation d'un convertisseur multicellulaire DC/DC isolé pour application aéronautique : Design and development of an isolated multicell DC/DC power converter for aeronautical applications.” 2015. Doctoral Dissertation, INP Toulouse. Accessed August 25, 2019. http://www.theses.fr/2015INPT0042.

MLA Handbook (7th Edition):

Brandelero, Julio Cezar. “Conception et réalisation d'un convertisseur multicellulaire DC/DC isolé pour application aéronautique : Design and development of an isolated multicell DC/DC power converter for aeronautical applications.” 2015. Web. 25 Aug 2019.

Vancouver:

Brandelero JC. Conception et réalisation d'un convertisseur multicellulaire DC/DC isolé pour application aéronautique : Design and development of an isolated multicell DC/DC power converter for aeronautical applications. [Internet] [Doctoral dissertation]. INP Toulouse; 2015. [cited 2019 Aug 25]. Available from: http://www.theses.fr/2015INPT0042.

Council of Science Editors:

Brandelero JC. Conception et réalisation d'un convertisseur multicellulaire DC/DC isolé pour application aéronautique : Design and development of an isolated multicell DC/DC power converter for aeronautical applications. [Doctoral Dissertation]. INP Toulouse; 2015. Available from: http://www.theses.fr/2015INPT0042


Brno University of Technology

3. Pospíšil, Petr. Knihovna pro efektivní záznam videa v 3D aplikaci .

Degree: 2012, Brno University of Technology

Tato diplomová práce se věnuje knihovně pro záznam videa na pozadí v 3D aplikacích. Podporovány jsou operační systémy Microsoft Windows a Linux. Zaznamenává se obraz i zvuk. Záznam obrazu je podporován v programovacích rozhraních OpenGL, Direct3D9, Direct3D10 a Direct3D11. Obraz lze volitelně komprimovat pomocí MJPG kodeku. Zvuk je zaznamenáván pro celý počítač pomocí rozhraní WaveForm audio, Windows Core Audio a ALSA. Tato rozhraní zaznamenávají zvuky pro celý počítač. Celkem lze zaznamenávat a mixovat až dva zvukové proudy. Výsledné video je uloženo do AVI souboru. Součástí knihovny je i možnost překrytí obrazovky aplikace vlastními textovými informacemi.; This thesis deals with library for recording video in the background of 3D application. A library is designed to work under the Microsoft Windows and Linux operation systems.  It records image and also sound. Image recording is supported in OpenGL, Direct3D9, Direct3D10 and Direct3D11. To reduce video data size, library supports image compression using MJPG codec. Audio is recorded by WaveForm audio, Windows Core Audio or ALSA. Recorded sound is for whole operation system. A library is able to record up to two audio streams to accommodate possible microphone input. It can mix audio data together if needed. Output data are then written into AVI file. It is possible to write own text information as overlay that is rendered as part of application screen output. Advisors/Committee Members: Havel, Jiří (advisor).

Subjects/Keywords: 3D aplikace; knihovna pro záznam videa; digitální obraz; Direct3D; Direct3D9; D3D9; Direct3D10; D3D10; Direct3D11; D3D11; OpenGL; GL; Windows WaveForm Audio; Windows Core Audio; WASAPI; Diskrétní cosinová transformace; JPEG; digitální zvuk; Advanced Linux Sound Architecture; ALSA; pásmově omezená interpolace; mixování zvukových kanálů; Portable Executable; PE32; Executable and Linkable Format; ELF; zachytávání volání funkcí; zachytávání COM; LD_LIBRARY_PRELOAD; zachytávání volání okenních zpráv Windows; Audio Video Interleaved; AVI; překrytí obrazu; GDI; XLIB; Font; AVCaptureLib.; 3D application; video capture library; digital image; Direct3D; Direct3D9; D3D9; Direct3D10; D3D10; Direct3D11; D3D11; OpenGL; GL; Windows WaveForm Audio; Windows Core Audio; WASAPI; Discrete cosine transformation; JPEG; digital audio; Advanced Linux Sound Architecture; ALSA; band-limited interpolation; audio channel mixing; Portable Executable; PE32; Executable and Linkable Format; ELF; function hooking; COM hooking; LD_LIBRARY_PRELOAD; Windows Hooks; Audio Video Interleaved; AVI; overlay; GDI; XLIB; Font; AVCaptureLib.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Pospíšil, P. (2012). Knihovna pro efektivní záznam videa v 3D aplikaci . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/53730

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Pospíšil, Petr. “Knihovna pro efektivní záznam videa v 3D aplikaci .” 2012. Thesis, Brno University of Technology. Accessed August 25, 2019. http://hdl.handle.net/11012/53730.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Pospíšil, Petr. “Knihovna pro efektivní záznam videa v 3D aplikaci .” 2012. Web. 25 Aug 2019.

Vancouver:

Pospíšil P. Knihovna pro efektivní záznam videa v 3D aplikaci . [Internet] [Thesis]. Brno University of Technology; 2012. [cited 2019 Aug 25]. Available from: http://hdl.handle.net/11012/53730.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pospíšil P. Knihovna pro efektivní záznam videa v 3D aplikaci . [Thesis]. Brno University of Technology; 2012. Available from: http://hdl.handle.net/11012/53730

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.