Results 251 to 260 of about 4,644,594 (299)

Distributed Coherent Group Communications

MILCOM 2018 - 2018 IEEE Military Communications Conference (MILCOM), 2018
Wireless communication networks need to support high data rate, low power consumption and extended connectivity over long distances, which may not be feasible with point-to-point transmissions. This paper presents the distributed coherent group communication solution to achieve high power gain, which is in turn translated to improvements in ...
Yi Shi 0001, Satya Prakash Ponnaluri, Yalin E. Sagduyu, Eric Van Doorn   +3 more
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Coherent Lightwave Communications

SPIE Proceedings, 1985
In this talk we will present fundamental theoretical considerations affecting the performance of coherent lightwave communication systems. These systems include a single-mode laser and a modulator at the source and a coherent receiver which is the optical onalog of a superheterodyne radio set.
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Recent Advances in Coherent Optical Communication

Advances in Optics and Photonics, 2009
Recent progress in coherent optical communication, a field revived by advances in digital signal processing (DSP), is reviewed. DSP-based phase and polarization management techniques make coherent detection robust and practical.With coherent detection ...
Guifang Li
exaly   +2 more sources

Coherent Optical Communication Technology

Optical Fiber Communication Conference, 2015
This tutorial lecture discusses fundamentals of the coherent optical communication technology. It covers quantum mechanical understanding of coherent (heterodyne and homodyne) detection, optical circuits for coherent receivers, and digital signal processing for coherent communications.
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Coherent Optical Communication

Asia Optical Fiber Communication and Optoelectronic Exposition and Conference, 2008
Optical coherent receivers with subsequent DSP show great promise as enabling technologies for ultra-high information rate optical transmission systems. DSP alleviates the need to lock the phases of the LO and transmitter signal, which is one of the limiting factors for the use of coherent receivers in the optical domain.
openaire   +1 more source

Scheme of coherent optical chaos communication

Optics Letters, 2020
We propose and numerically demonstrate a scheme of coherent optical chaos communication using semiconductor lasers for secure transmission of optical quadrature amplitude modulation (QAM) signals. In this scheme, a laser intensity chaos and its delayed duplicate are used to amplitude-quadrature modulate a continuous-wave light to generate a chaotic ...
Longsheng Wang, Xiaoxin Mao, Anbang Wang, Yuncai Wang, Zhensen Gao, Songsui Li, Lianshan Yan   +6 more
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Coherent Optical Communication

Seventh Topical Meeting on Integrated and Guided-Wave Optics, 1984
Virtually all fibre transmission systems up to the present have used simple intensity modulation of the transmit laser, most frequently in the form of binary ON/OFF modulation. At the receiver, incoming optical power has been converted directly to photocurrent in a photodetector.
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Coherent Communication Systems

2020
In this chapter, we outline the modern coherent communication formats and how they are realized. These coherent communication formats enable long-distance and high-speed transmission. We also discuss the sources of noise in optical communication systems and the relationship between signal to noise, bit error rate, and communication format.
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Self-coherent OFDM for wireless communications

2015 IEEE International Conference on Communications (ICC), 2015
In this paper, we present self-coherent OFDM, a well-known non-coherent technique in optical communications, for wireless RF communications. Self-coherent OFDM is known to have complete immunity against phase noise using a simple RF front-end receiver and to provide a significantly higher spectral efficiency than self-het OFDM, which uses at most 50 ...
Qianyu Jin, Yi Hong 0001, Emanuele Viterbo   +2 more
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Quantum communication with three coherent states

IEEE Transactions on Communications, 1995
Quantum communication with a nonsymmetrical set of three states is considered. Some results obtained from numerical computation are presented. A model for quantum detection called "near optimum", similar to the binary case, is studied. Calculations of error probability in detection schemes subject to information criteria are performed and discussed ...
T.Uyematsu, C. Bendjaballah
openaire   +1 more source