Results 271 to 280 of about 1,504,963 (315)

Non-Coherent Parallel Detection of Ambient Backscatter Communications With Multiple Tags

IEEE Transactions on Vehicular Technology, 2023
Ambient backscatter communication (AmBC), which utilizes ambient radio-frequency (RF) signal for communications, is a promising technology for Internet-of-Things with stringent power-and-cost constraints. In this paper, we consider an AmBC system with an
Gang Yang, Zhiyi Luo, Ning Jin, Ying-Chang Liang, Yongjun Xu, Gongpu Wang   +5 more
semanticscholar   +1 more source

Communication before coherence

European Journal of Neuroscience, 2012
AbstractThe hypothesis of communication through coherence proposes that coherent or synchronous oscillations in connected neural systems can promote communication. It has been applied mainly to how oscillations interact in connected networks. We tested by simulations whether information transmission about an external stimulus from one network to a ...
Edmund T, Rolls, Tristan J, Webb, Gustavo, Deco   +2 more
openaire   +2 more sources

Hierarchical coherent and non-coherent communication

2017 51st Asilomar Conference on Signals, Systems, and Computers, 2017
In this paper, we propose a method for simultaneous communication of coarse and detailed information over three types of layers: two nested layers to be communicated non-coherently using Grassmannian constellations and an additional layer to be communicated coherently using unitary constellations.
Kareem M. Attiah, Karim G. Seddik, Ramy H. Gohary   +2 more
openaire   +1 more source

Joint Energy and Correlation Detection Assisted Non-Coherent OFDM-DCSK System for Underwater Acoustic Communications

IEEE Transactions on Communications, 2022
A joint energy and correlation detection aided orthogonal frequency division multiplexing differential chaos shift keying (JECD-OFDM-DCSK) system is presented in this paper, where the reference and information-bearing signals of JECD-OFDM-DCSK are ...
Xiangming Cai, Weikai Xu, L. Wang, Georges Kaddoum   +3 more
semanticscholar   +1 more source

From Coherent Communications to Quantum Security: Modern Techniques in CV-QKD

2024 SBFoton International Optics and Photonics Conference (SBFoton IOPC)
Quantum key distribution (QKD) leverages quantum information theory to enable two remote parties to establish a random key with unconditional secrecy. Performing QKD with coherent light states integrates with modern optical communication techniques but ...
V. L. da Silva, M. A. Dias, Nelson Alves Ferreira Neto, Alexandre B. Tacla   +3 more
semanticscholar   +1 more source

Recent trends in coherent free-space optical communications

OPTO, 2021
Free-space optical communication is a line-of-sight wireless communication scheme, which is preferred for its number of prime advantages over radio frequency wireless communication, such as no spectrum licensing, large bandwidth, inherent security ...
Chao Zhang, Kota Uyama, Zheyuan Zhang, Lei Jin, S. Set, S. Yamashita   +5 more
semanticscholar   +1 more source

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

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.
openaire   +1 more source

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.
openaire   +1 more source

Coherent optical communication

International Zurich Seminar on Digital Communications, Electronic Circuits and Systems for Communications., 2002
Activities associated with the development of coherent optical communication systems for application in future public broadband networks are reviewed. It is pointed out that the main future transmission medium, the optical single-mode fiber, provides an extremely high bandwidth which will have to be utilized when high-capacity-demanding digital ...
openaire   +1 more source