Intensity modulation

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In optical communications, intensity modulation (IM) is a form of modulation in which the optical power output of a source is varied in accordance with some characteristic of the modulating signal. (Wikipedia.org)






Conferences related to Intensity modulation

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2020 IEEE International Symposium on Information Theory (ISIT)

Information theory, coding theory, communication theory, signal processing, and foundations of machine learning


2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

All areas of ionizing radiation detection - detectors, signal processing, analysis of results, PET development, PET results, medical imaging using ionizing radiation


2020 Optical Fiber Communications Conference and Exhibition (OFC)

The Optical Fiber Communication Conference and Exhibition (OFC) is the largest global conference and exhibition for optical communications and networking professionals. For over 40 years, OFC has drawn attendees from all corners of the globe to meet and greet, teach and learn, make connections and move business forward.OFC attracts the biggest names in the field, offers key networking and partnering opportunities, and provides insights and inspiration on the major trends and technology advances affecting the industry. From technical presentations to the latest market trends and predictions, OFC is a one-stop-shop.


Oceans 2020 MTS/IEEE GULF COAST

To promote awareness, understanding, advancement and application of ocean engineering and marine technology. This includes all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water. This includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources.

  • OCEANS 2018 MTS/IEEE Charleston

    Ocean, coastal, and atmospheric science and technology advances and applications

  • OCEANS 2017 - Anchorage

    Papers on ocean technology, exhibits from ocean equipment and service suppliers, student posters and student poster competition, tutorials on ocean technology, workshops and town meetings on policy and governmental process.

  • OCEANS 2016

    The Marine Technology Scociety and the Oceanic Engineering Society of the IEEE cosponor a joint annual conference and exposition on ocean science, engineering, and policy. The OCEANS conference covers four days. One day for tutorials and three for approx. 500 technical papers and 150 -200 exhibits.

  • OCEANS 2015

    The Marine Technology Scociety and the Oceanic Engineering Society of the IEEE cosponor a joint annual conference and exposition on ocean science, engineering, and policy. The OCEANS conference covers four days. One day for tutorials and three for approx. 450 technical papers and 150-200 exhibits.

  • OCEANS 2014

    The OCEANS conference covers four days. One day for tutorials and three for approx. 450 technical papers and 150-200 exhibits.

  • OCEANS 2013

    Three days of 8-10 tracks of technical sessions (400-450 papers) and concurent exhibition (150-250 exhibitors)

  • OCEANS 2012

    Ocean related technology. Tutorials and three days of technical sessions and exhibits. 8-12 parallel technical tracks.

  • OCEANS 2011

    The Marine Technology Society and the Oceanic Engineering Scociety of the IEEE cosponsor a joint annual conference and exposition on ocean science engineering, and policy.

  • OCEANS 2010

    The Marine Technology Society and the Oceanic Engineering Scociety of the IEEE cosponsor a joint annual conference and exposition on ocean science engineering, and policy.

  • OCEANS 2009

  • OCEANS 2008

    The Marine Technology Society (MTS) and the Oceanic Engineering Society (OES) of the Institute of Electrical and Electronic Engineers (IEEE) cosponsor a joint conference and exposition on ocean science, engineering, education, and policy. Held annually in the fall, it has become a focal point for the ocean and marine community to meet, learn, and exhibit products and services. The conference includes technical sessions, workshops, student poster sessions, job fairs, tutorials and a large exhibit.

  • OCEANS 2007

  • OCEANS 2006

  • OCEANS 2005

  • OCEANS 2004

  • OCEANS 2003

  • OCEANS 2002

  • OCEANS 2001

  • OCEANS 2000

  • OCEANS '99

  • OCEANS '98

  • OCEANS '97

  • OCEANS '96


2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII)

The world's premiere conference in MEMS sensors, actuators and integrated micro and nano systems welcomes you to attend this four-day event showcasing major technological, scientific and commercial breakthroughs in mechanical, optical, chemical and biological devices and systems using micro and nanotechnology.The major areas of activity in the development of Transducers solicited and expected at this conference include but are not limited to: Bio, Medical, Chemical, and Micro Total Analysis Systems Fabrication and Packaging Mechanical and Physical Sensors Materials and Characterization Design, Simulation and Theory Actuators Optical MEMS RF MEMS Nanotechnology Energy and Power


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Periodicals related to Intensity modulation

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Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


Communications Letters, IEEE

Covers topics in the scope of IEEE Transactions on Communications but in the form of very brief publication (maximum of 6column lengths, including all diagrams and tables.)


Communications Magazine, IEEE

IEEE Communications Magazine was the number three most-cited journal in telecommunications and the number eighteen cited journal in electrical and electronics engineering in 2004, according to the annual Journal Citation Report (2004 edition) published by the Institute for Scientific Information. Read more at http://www.ieee.org/products/citations.html. This magazine covers all areas of communications such as lightwave telecommunications, high-speed data communications, personal communications ...


Communications Surveys & Tutorials, IEEE

Each tutorial reviews currents communications topics in network management and computer and wireless communications. Available tutorials, which are 2.5 to 5 hours in length contains the original visuals and voice-over by the presenter. IEEE Communications Surveys & Tutorials features two distinct types of articles: original articles and reprints. The original articles are exclusively written for IEEE Communications Surveys & Tutorials ...


Communications, IEEE Transactions on

Telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation, including radio; wire; aerial, underground, coaxial, and submarine cables; waveguides, communication satellites, and lasers; in marine, aeronautical, space and fixed station services; repeaters, radio relaying, signal storage, and regeneration; telecommunication error detection and correction; multiplexing and carrier techniques; communication switching systems; data communications; and communication theory. In addition to the above, ...


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Most published Xplore authors for Intensity modulation

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Xplore Articles related to Intensity modulation

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Simulation Studies Of Relativistic Klystron Arnplofier

IEEE Conference Record - Abstracts. 1992 IEEE International Conference on Plasma, 1993

None


Semiconductor Laser Radar Techniques For High-precision Position And Velocity Sensing

LEOS Summer Topical on New Semiconductor Laser Devices and Applications, 1990

Summary form only given. Semiconductor diode lasers are attractive sources for many laser radar applicaitons because of their small size and light weight. The experimental and analytical results presented in this paper indicate that many such sensors can by multiplexed and services by a single transceiver using only one semiconductor laser diode.


Highly Linear Coherent Receiver With Feedback

IEEE Photonics Technology Letters, 2007

We propose and demonstrate a novel coherent receiver with feedback for high- linearity analog photonic links. In the proposed feedback receiver, a local phase modulator tracks the phase change of the signal and reduces the effective swing across the phase demodulator without reducing the transmitted signal. The signal-to-noise-ratio is thus maintained while linearity is improved. Up to 20-dB improvement in ...


New Methods for Stabilizing Dee Voltage and Beam R.F. Phase

IEEE Transactions on Nuclear Science, 1979

A short term peak to peak Dee voltage stability of 10-4 is obtained by introducing a "ripple memory" in the voltage regulation system. The ripple memory consists of a shift register storing the drive signal needed to cancel the ripple. The stored signal is continuously updated. It is shown that the memory can be added to existing systems, reducing ripple ...


Adaptive multifrequency modulation method for an advanced laser range finder

IEEE Transactions on Instrumentation and Measurement, 1994

The intensity of a laser beam is modulated with radio frequencies (RF), in a laser range finder. The modulated laser beam is directed to a target, and the reflected light is detected. The phase of the RP signal from the detector is measured. A semitransparent obstacle between the laser and the target degrades the accuracy of the range measurement. In ...


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Educational Resources on Intensity modulation

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IEEE-USA E-Books

  • Simulation Studies Of Relativistic Klystron Arnplofier

    None

  • Semiconductor Laser Radar Techniques For High-precision Position And Velocity Sensing

    Summary form only given. Semiconductor diode lasers are attractive sources for many laser radar applicaitons because of their small size and light weight. The experimental and analytical results presented in this paper indicate that many such sensors can by multiplexed and services by a single transceiver using only one semiconductor laser diode.

  • Highly Linear Coherent Receiver With Feedback

    We propose and demonstrate a novel coherent receiver with feedback for high- linearity analog photonic links. In the proposed feedback receiver, a local phase modulator tracks the phase change of the signal and reduces the effective swing across the phase demodulator without reducing the transmitted signal. The signal-to-noise-ratio is thus maintained while linearity is improved. Up to 20-dB improvement in spur-free dynamic range (SFDR) is achieved experimentally. At 3.13 mA of average photocurrent per photodiode, the measured SFDR is 124.3 dBmiddotHz<sup>2/3</sup>, which corresponds to an SFDR of 131.5 dBmiddotHz<sup>2/3</sup> when the link is shot-noise-limited

  • New Methods for Stabilizing Dee Voltage and Beam R.F. Phase

    A short term peak to peak Dee voltage stability of 10-4 is obtained by introducing a "ripple memory" in the voltage regulation system. The ripple memory consists of a shift register storing the drive signal needed to cancel the ripple. The stored signal is continuously updated. It is shown that the memory can be added to existing systems, reducing ripple by up to two orders of magnitude. A beam phase detection system which can be used at nanoampère beam currents is described. The beam bursts are detected by high input impedance pick-up probes. Synchronous detection of a low frequency beam intensity modulation is used to eliminate any Dee voltage interference. Theoretical and experimental values of the output noise level are given.

  • Adaptive multifrequency modulation method for an advanced laser range finder

    The intensity of a laser beam is modulated with radio frequencies (RF), in a laser range finder. The modulated laser beam is directed to a target, and the reflected light is detected. The phase of the RP signal from the detector is measured. A semitransparent obstacle between the laser and the target degrades the accuracy of the range measurement. In this paper, an adaptive multifrequency modulation method is proposed and experimentally verified to overcome this problem.<<ETX>>

  • Verification of accuracy of treatment delivery in serial tomotherapy

    A method for the verification of accuracy of patient set-up during delivery of serial tomotherapy (ST) is presented. Analysis of 156 portal films taken during 132 fractions on eight patients enabled variation in daily setup to be quantified. It is concluded that daily portal verification of patient position is essential for accurate delivery of ST.

  • Duobinary signal generation using high-extinction ratio modulation

    We study the impact of modulator extinction-ratio on duobinary signal generation. Duobinary transmission with 2 % modulation depth was achieved at 10 Gb/s, where the extinction-ratio was enhanced by an active trimming technique.

  • Photodetection by light-induced barrier modulation in Cu-diffused Au-CdS diodes

    Modified Schottky barriers of the type Au-CdS:Cu were prepared by diffusing Cu to a depth of 0.1 to 0.2 µm into single crystals of CdS, prior to evaporating rectifying Au contacts. Modulation of essentially thermionic forward current by light-induced lowering of an electrostatic barrier leads to steady-state electron-per-photon gains in excess of 106at light intensities lower than5 \times 10^{11}photons cm-2sec-1where response times exceed 1 sec. Barrier- height determinations, in the dark and under illumination with 5000-Å light, by means of internal photoemission, thermal activation energy, and J-V measurements, show unequivocally that under saturating light conditions the potential barrier is reduced by 0.23 ± 0.03 V.

  • A subcarrier-multiplexed coherent FSK system using a Mach-Zehnder modulator with automatic bias control

    A subcarrier-multiplexed coherent optical transmission system using a push- pull Mach-Zehnder intensity modulator is demonstrated. Six subcarrier channels cover a six-octave bandwidth and are frequency-shift keying (FSK) modulated at 45 Mb/s. With an optical phase modulation index of 0.38, a receiver sensitivity of -36 dBm is obtained. Second-order intermodulation is canceled by more than 20 dB due to the balanced structure of the modulator. This results in an 8-dB improvement in the receiver sensitivity compared to the system using an optical phase modulator. A simple automatic bias-control scheme for the Mach-Zehnder modulator is also demonstrated. It utilizes the optical signal from the complementary output port of the dual-output modulator.<<ETX>>

  • Performance evaluation of L-pulse-position modulation on non-directed indoor infrared channels

    We examine the performance of high-speed non-directed infrared links using L -pulse-position modulation (L-PPM). When used with intensity modulation and direct detection, L-PPM leads to high average-power efficiency, because of its high peak-to-average power ratio. We derive an expression for the BER of an L-PPM link on an ISI channel. Using the measured characteristics of multipath indoor infrared channels, we calculate BER curves and ISI power penalties for 2-, 4-, 8- and 16-PPM links operating at 10 and 30 Mb/s. Our results indicate that L-PPM is a very promising modulation technique for high-speed non- directed infrared communication.<<ETX>>



Standards related to Intensity modulation

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IEEE Recommended Practice for Determining Safe Distances From Radio Frequency Transmitting Antennas When Using Electric Blasting Caps During Explosive Operations

This project provides recommended practices for the prediction and practical determination of safe distances from radio and radar transmitting antennas when using electric initiators to remotely detonate an explosive charge. Specifically, this document includes mathematical formulas, tables, and charts that allow the user to determine safe distances from RF transmitters with spectrum bands from 0.5 MHz to 300 GHz, including ...


IEEE Recommended Practice for Measurements and Computations of Radio Frequency Electromagnetic Fields With Respect to Human Exposure to Such Fields, 100 kHz-300 GHz

Revise and develop specifications for preferred methods for measuring and computing external radiofrequency electromagnetic fields to which persons may be exposed. In addition, the document will specify preferred methods for the measurement and computation of the resulting fields and currents that are induced in bodies of humans exposed to these fields over the frequency range of 100 kHz to 300 ...



Jobs related to Intensity modulation

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