Photonic Analog To Digital Conversion Using A Robust Symmetrical Number System
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Photonic Analog To Digital Conversion Using A Robust Symmetrical Number System
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Author :
language : en
Publisher:
Release Date : 2005
Photonic Analog To Digital Conversion Using A Robust Symmetrical Number System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
A photonic analog-to-digital converter (ADC) based on a robust symmetrical number system (RSNS) was constructed and tested. The analog signal to be converted is used to amplitude modulate an optical pulse from a laser using three Mach-Zehnder interferometers (MZI). The Mach-Zehnder interferometers fold the input analog signal for a three-channel RSNS encoding. The folding waveforms are then detected and amplitude-analyzed by three separate comparator banks, the outputs of which are used to determine a digital representation of the analog signal. This design uses the RSNS preprocessing to encode the signal with the fewest number of comparators for any selected bit resolution. In addition to the efficiency of its use of comparators, the RSNS encoding has inherent Gray-code properties making it particularly attractive for eliminating any possible encoding errors. The RSNS encoding is combined with an optical infrastructure that offers high bandwidth and low insertion loss characteristics. A full implementation was constructed and tested. The lack of a high-speed data acquisition device limited the results to examining the preprocessing and digital processing separately. With the system integration of a data acquisition device, a wideband direct digital antenna architecture can be demonstrated.
Developing Digital Rf Memories And Transceiver Technologies For Electromagnetic Warfare
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Author : Phillip E. Pace
language : en
Publisher: Artech House
Release Date : 2022-05-31
Developing Digital Rf Memories And Transceiver Technologies For Electromagnetic Warfare written by Phillip E. Pace and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-31 with Technology & Engineering categories.
This book provides a comprehensive resource and thorough treatment in the latest development of Digital RF Memory (DRFM) technology and their key role in maintaining dominance over the electromagnetic spectrum. Part I discusses the use of advanced technology to design transceivers for spectrum sensing using unmanned systems to dominate the electromagnetic spectrum. Part II uses artificial intelligence and machine learning to enable modern spectrum sensing and detection signal processing for electronic support and electronic attack. Another key contribution is examination of counter-DRFM techniques. DRFM and transceiver design details and examples are provided along with the MATLAB software allowing the reader to construct their own embedded DRFM transceivers for unmanned systems. It examines the design trade-offs in developing multiple, structured, false target synthesis DRFM architectures and aids in developing counter-DRFM techniques and distinguish false target from real ones. Written by an expert in the field, and including MATLAB™ design software, this is the only comprehensive book written on the subject of DRFM.
Photonic Analog To Digital Coonversion Using A Robust Symmetrical Number System
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Author :
language : en
Publisher:
Release Date : 2005
Photonic Analog To Digital Coonversion Using A Robust Symmetrical Number System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Analog-to-digital converters categories.
A photonic analog-to-digital converter (ADC) based on a robust symmetrical number system (RSNS) was constructed and tested. The analog signal to be converted is used to amplitude modulate an optical pulse from a laser using three Mach-Zehnder interferometers (MZI). The Mach-Zehnder interferometers fold the input analog signal for a three-channel RSNS encoding. The folding waveforms are then detected and amplitude-analyzed by three separate comparator banks, the outputs of which are used to determine a digital representation of the analog signal. This design uses the RSNS preprocessing to encode the signal with the fewest number of comparators for any selected bit resolution. In addition to the efficiency of its use of comparators, the RSNS encoding has inherent Gray-code properties making it particularly attractive for eliminating any possible encoding errors. The RSNS encoding is combined with an optical infrastructure that offers high bandwidth and low insertion loss characteristics. A full implementation was constructed and tested. The lack of a high-speed data acquisition device limited the results to examining the preprocessing and digital processing separately. With the system integration of a data acquisition device, a wideband direct digital antenna architecture can be demonstrated.
Photonic Analog To Digital Converters Preprocessing Using The Robust Symmetrical Number System For Direct Digitization Of Antenna Signals
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Author : Kee Leong Tong
language : en
Publisher:
Release Date : 2010
Photonic Analog To Digital Converters Preprocessing Using The Robust Symmetrical Number System For Direct Digitization Of Antenna Signals written by Kee Leong Tong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Electronics in military engineering categories.
The need to realize pervasive battlespace awareness is placing an increasing demand on the bandwidth and resolution performance of modern sensors, communication receivers and electronic warfare. Fundamental to realizing this demand is the omnipresent highspeed analog-to-digital converters. The need constantly exists for converters with lower power consumption. To reduce the number of power-consuming components, high-performance ADCs employ parallel configuration of analog folding circuits to symmetrically fold the input signal prior to quantization by high-speed comparators. In this thesis, a prototype of an optical folding 6-bit ADC utilizing a 7-bit preprocessing architecture was implemented using the Robust Symmetrical Number System (RSNS). The RSNS preprocessing architecture is a modular scheme in which the integer values within each modulus (comparator states), when considered together, change one at a time at the next position i.e. Gray-code property. MATLAB simulations are used to help determine the properties of the RSNS. These properties include the dynamic range (largest number of distinct consecutive vectors) and the location of the dynamic range within the number system. Since the waveform repeats every fundamental period, a method that reduces all indexes to the 'lowest common denominator' is developed to find the symmetrical residues of each channel. Using the symmetrical residues determined, the corresponding DC shifts on each waveform can be calculated. The architecture employs a three-modulus (mod 7, 8, 9) scheme to preprocess the antenna signal. Electro-optic modulation of the input signal to generate the required number of folds within the dynamic range was successfully carried out in the three-modulus realization using modulators with a small half-wave voltage. The detection output are carefully aligned and postprocessed before amplitude analyzing with a high-speed comparator circuit responsible for the sampling and quantization of the signal (designed under a separate thesis). Low frequency analysis of the results using a 1 kHz input signal indicate a 5.42 effective number of bits (ENOB), a signal-to-noise ratio plus distortion (SINAD) of 34.42 dB, and a total harmonic distortion (THD) of -- 62.84 dB.
Programmable Integrated Photonics
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Author : José Capmany
language : en
Publisher:
Release Date : 2020
Programmable Integrated Photonics written by José Capmany and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with Science categories.
This is the first comprehensive, self-contained introduction to the emergent field of Programmable Integrated Photonics. It covers theoretical and practical aspects ranging from basic technologies and the building of photonic component blocks, to design alternatives and principles of complex programmable photonic circuits, and their applications.
Detecting And Classifying Low Probability Of Intercept Radar
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Author : Phillip E. Pace
language : en
Publisher: Artech House
Release Date : 2004
Detecting And Classifying Low Probability Of Intercept Radar written by Phillip E. Pace and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Technology & Engineering categories.
Pace (Naval Postgraduate School) presents the principles of radar design that enable a low probability of intercept (LPI) by a noncooperative intercept receiver. The RF system uses complex pulse compression CW waveforms, low side lobe antennas, and power management techniques to render itself virtually undetectable. The second part of the textbook investigates three algorithms for providing the intercept receiver with a processing gain that is close to the radar's matched filter processing gain, and quantifies their performance with LPI waveforms. The CD-ROM contains MATLAB code for evaluating the complex LPI radar-receiver interactions. Annotation : 2004 Book News, Inc., Portland, OR (booknews.com).
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 2007
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Dissertations, Academic categories.
International Aerospace Abstracts
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Author :
language : en
Publisher:
Release Date : 1999
International Aerospace Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Aeronautics categories.
Integrated Nanophotonic Devices
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Author : Zeev Zalevsky
language : en
Publisher: Elsevier
Release Date : 2014-06-18
Integrated Nanophotonic Devices written by Zeev Zalevsky and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-06-18 with Technology & Engineering categories.
Nanophotonics is a newly developing and exciting field, with two main areas of interest: imaging/computer vision and data transport. The technologies developed in the field of nanophotonics have far reaching implications with a wide range of potential applications from faster computing power to medical applications, and "smart" eyeglasses to national security. Integrated Nanophotonic Devices explores one of the key technologies emerging within nanophotonics: that of nano-integrated photonic modulation devices and sensors. The authors introduce the scientific principles of these devices and provide a practical, applications-based approach to recent developments in the design, fabrication and experimentation of integrated photonic modulation circuits. For this second edition, all chapters have been expanded and updated to reflect this rapidly advancing field, and an entirely new chapter has been added to cover liquid crystals integrated with nanostructures. - Unlocks the technologies that will turn the rapidly growing research area of nanophotonics into a major area of commercial development, with applications in telecommunications, computing, security, and sensing - Nano-integrated photonic modulation devices and sensors are the components that will see nanophotonics moving out of the lab into a new generation of products and services - By covering the scientific fundamentals alongside technological applications, the authors open up this important multidisciplinary subject to readers from a range of scientific backgrounds
Ultrahigh And High Speed Photography Photonics And Videography
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Author : Donald R. Snyder
language : en
Publisher: SPIE-International Society for Optical Engineering
Release Date : 2004
Ultrahigh And High Speed Photography Photonics And Videography written by Donald R. Snyder and has been published by SPIE-International Society for Optical Engineering this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Photography categories.
Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.