Photonic Analog To Digital Converters Preprocessing Using The Robust Symmetrical Number System For Direct Digitization Of Antenna Signals

DOWNLOAD

Download Photonic Analog To Digital Converters Preprocessing Using The Robust Symmetrical Number System For Direct Digitization Of Antenna Signals PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Photonic Analog To Digital Converters Preprocessing Using The Robust Symmetrical Number System For Direct Digitization Of Antenna Signals book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Photonic Analog To Digital Converters Preprocessing Using The Robust Symmetrical Number System For Direct Digitization Of Antenna Signals

DOWNLOAD
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.

Photonic Analog To Digital Conversion Using A Robust Symmetrical Number System

DOWNLOAD
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.

Photonic Analog To Digital Coonversion Using A Robust Symmetrical Number System

DOWNLOAD
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.

Electromagnetics And Network Theory And Their Microwave Technology Applications

DOWNLOAD
Author : Stefan Lindenmeier
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-07-13

Electromagnetics And Network Theory And Their Microwave Technology Applications written by Stefan Lindenmeier and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-07-13 with Technology & Engineering categories.

This volume provides a discussion of the challenges and perspectives of electromagnetics and network theory and their microwave applications in all aspects. It collects the most interesting contribution of the symposium dedicated to Professor Peter Russer held in October 2009 in Munich.

4th International Conference On Internet Of Things And Connected Technologies Iciotct 2019

DOWNLOAD
Author : Neeta Nain
language : en
Publisher: Springer Nature
Release Date : 2020-02-14

4th International Conference On Internet Of Things And Connected Technologies Iciotct 2019 written by Neeta Nain and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-02-14 with Technology & Engineering categories.

This book presents the proceedings of the 4th International Conference on Internet of Things and Connected Technologies (ICIoTCT), held on May 9–10, 2019, at Malaviya National Institute of Technology (MNIT), Jaipur, India. The Internet of Things (IoT) promises to usher in a revolutionary, fully interconnected “smart” world, with relationships between objects and their environment and objects and people becoming more tightly intertwined. The prospect of the Internet of Things as a ubiquitous array of devices bound to the Internet could fundamentally change how people think about what it means to be “online”. The ICIotCT 2019 conference provided a platform to discuss advances in Internet of Things (IoT) and connected technologies, such as various protocols and standards. It also offered participants the opportunity to interact with experts through keynote talks, paper presentations and discussions, and as such stimulated research. With the recent adoption of a variety of enabling wireless communication technologies, like RFID tags, BLE, ZigBee, embedded sensor and actuator nodes, and various protocols such as CoAP, MQTT and DNS, IoT has moved on from its infancy. Today smart sensors can collaborate directly with machines to automate decision-making or to control a task without human involvement. Further, smart technologies, including green electronics, green radios, fuzzy neural approaches, and intelligent signal processing techniques play an important role in the development of the wearable healthcare devices.

Small And Short Range Radar Systems

DOWNLOAD
Author : Gregory L. Charvat
language : en
Publisher: CRC Press
Release Date : 2014-04-04

Small And Short Range Radar Systems written by Gregory L. Charvat and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-04-04 with Technology & Engineering categories.

Radar Expert, Esteemed Author Gregory L. Charvat on CNN and CBSAuthor Gregory L. Charvat appeared on CNN on March 17, 2014 to discuss whether Malaysia Airlines Flight 370 might have literally flown below the radar. He appeared again on CNN on March 20, 2014 to explain the basics of radar, and he explored the hope and limitations of the technology i

Information Systems Design And Intelligent Applications

DOWNLOAD
Author : Vikrant Bhateja
language : en
Publisher: Springer
Release Date : 2018-03-01

Information Systems Design And Intelligent Applications written by Vikrant Bhateja and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-01 with Technology & Engineering categories.

The book is a collection of high-quality peer-reviewed research papers presented at International Conference on Information System Design and Intelligent Applications (INDIA 2017) held at Duy Tan University, Da Nang, Vietnam during 15-17 June 2017. The book covers a wide range of topics of computer science and information technology discipline ranging from image processing, database application, data mining, grid and cloud computing, bioinformatics and many others. The various intelligent tools like swarm intelligence, artificial intelligence, evolutionary algorithms, bio-inspired algorithms have been well applied in different domains for solving various challenging problems.

Body Sensor Networks

DOWNLOAD
Author : Guang-Zhong Yang
language : en
Publisher: Springer
Release Date : 2014-04-16

Body Sensor Networks written by Guang-Zhong Yang and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-04-16 with Computers categories.

The last decade has witnessed a rapid surge of interest in new sensing and monitoring devices for wellbeing and healthcare. One key development in this area is wireless, wearable and implantable in vivo monitoring and intervention. A myriad of platforms are now available from both academic institutions and commercial organisations. They permit the management of patients with both acute and chronic symptoms, including diabetes, cardiovascular diseases, treatment of epilepsy and other debilitating neurological disorders. Despite extensive developments in sensing technologies, there are significant research issues related to system integration, sensor miniaturisation, low-power sensor interface, wireless telemetry and signal processing. In the 2nd edition of this popular and authoritative reference on Body Sensor Networks (BSN), major topics related to the latest technological developments and potential clinical applications are discussed, with contents covering. Biosensor Design, Interfacing and Nanotechnology Wireless Communication and Network Topologies Communication Protocols and Standards Energy Harvesting and Power Delivery Ultra-low Power Bio-inspired Processing Multi-sensor Fusion and Context Aware Sensing Autonomic Sensing Wearable, Ingestible Sensor Integration and Exemplar Applications System Integration and Wireless Sensor Microsystems The book also provides a comprehensive review of the current wireless sensor development platforms and a step-by-step guide to developing your own BSN applications through the use of the BSN development kit.

5th International Conference On Biomedical Engineering In Vietnam

DOWNLOAD
Author : Vo Van Toi
language : en
Publisher: Springer
Release Date : 2014-12-05

5th International Conference On Biomedical Engineering In Vietnam written by Vo Van Toi and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-12-05 with Technology & Engineering categories.

This volume presents the proceedings of the Fifth International Conference on the Development of Biomedical Engineering in Vietnam which was held from June 16-18, 2014 in Ho Chi Minh City. The volume reflects the progress of Biomedical Engineering and discusses problems and solutions. I aims identifying new challenges, and shaping future directions for research in biomedical engineering fields including medical instrumentation, bioinformatics, biomechanics, medical imaging, drug delivery therapy, regenerative medicine and entrepreneurship in medical devices.

Converging Technologies For Improving Human Performance

DOWNLOAD
Author : Mihail C. Roco
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-17

Converging Technologies For Improving Human Performance written by Mihail C. Roco and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-17 with Technology & Engineering categories.

M. C. Roco and W.S. Bainbridge In the early decades of the 21st century, concentrated efforts can unify science based on the unity of nature, thereby advancing the combination of nanotechnology, biotechnology, information technology, and new technologies based in cognitive science. With proper attention to ethical issues and societal needs, converging in human abilities, societal technologies could achieve a tremendous improvement outcomes, the nation's productivity, and the quality of life. This is a broad, cross cutting, emerging and timely opportunity of interest to individuals, society and humanity in the long term. The phrase "convergent technologies" refers to the synergistic combination of four major "NBIC" (nano-bio-info-cogno) provinces of science and technology, each of which is currently progressing at a rapid rate: (a) nanoscience and nanotechnology; (b) biotechnology and biomedicine, including genetic engineering; (c) information technology, including advanced computing and communications; (d) cognitive science, including cognitive neuroscience. Timely and Broad Opportunity. Convergence of diverse technologies is based on material unity at the nanoscale and on technology integration from that scale.