Results 91 to 100 of about 145,584 (294)

Continuous variable quantum key distribution with two-mode squeezed states

, 2012
Quantum key distribution (QKD) enables two remote parties to grow a shared key which they can use for unconditionally secure communication [1]. The applicable distance of a QKD protocol depends on the loss and the excess noise of the connecting quantum ...
C Silberhorn, C Weedbrook, C Weedbrook, Ch Weedbrook, D Gottesman, F Grosshans, F Grosshans, F Grosshans, J Lodewyck, M Hillery, M Navascues, MD Reid, MM Wolf, NJ Cerf, P Jouguet, P Jouguet, R Dong, R García-Patron, R García-Patrón, R Renner, S Lorenz, S Pirandola, S Pirandola, SL Braunstein, TC Ralph, V Scarani, VC Usenko, VC Usenko, X Su, Y Shen   +29 more
core   +1 more source

Blind Shaping Rate Identification for Probabilistic Shaping Quadrature Amplitude Modulation Formats [PDF]

, 2020
Zexin Chen, Jianing Lu, Songnian Fu, Ming Tang, Dongxian Liu, Chao Lü   +5 more
openalex   +1 more source

Warm Rydberg atom-based quadrature amplitude-modulated receiver

Optics Express
Rydberg atoms exhibit both remarkable sensitivity to electromagnetic fields making them promising candidates for revolutionizing field sensors and, unlike conventional antennas, they neither disturb the measured field nor necessitate extensive calibration procedures.
Jan Nowosielski, Marcin Jastrzębski, Pavel Halavach, Karol Łukanowski, Marcin Jarzyna, Mateusz Mazelanik, Wojciech Wasilewski, Michał Parniak   +7 more
openaire   +3 more sources

Distinguishing Between the Short‐Term Climate Responses to Different Stratospheric Aerosol Injection Latitudes With Explainable Artificial Intelligence

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.
Abstract Stratospheric aerosol injection (SAI), whereby reflective particles are released into the stratosphere to induce cooling, is one possible tool to counteract global warming and its associated risks. However, there is much uncertainty surrounding how SAI would be deployed, as well as the potential of novel and unknown risks and impacts.
Cameron Dong, Charlotte Connolly, Elizabeth A. Barnes   +2 more
wiley   +1 more source

LDPC-Coded Generalized Frequency Division Multiplexing for Intensity-Modulated Direct-Detection Optical Systems

IEEE Photonics Journal, 2019
In this paper, a low-density parity check (LDPC) coded GFDM with high-level modulation scheme is proposed for more flexible and advanced multicarrier modulation in intensity-modulated/direct-detection (IM/DD) optical systems.
Dong Guo, Wei Zhang, Feng Tian, Jianyang Shi, Kaihui Wang, Miao Kong, Junwen Zhang, Kai Lv, Deng'ao Li, Xiaolong Pan, Xiangjun Xin   +10 more
doaj   +1 more source

Quantum Noise Locking

, 2005
Quantum optical states which have no coherent amplitude, such as squeezed vacuum states, can not rely on standard readout techniques to generate error signals for control of the quadrature phase. Here we investigate the use of asymmetry in the quadrature
Breitenbach G, Buchler B C, David E McClelland, Eugeniy E Mikhailov, Keisuke Goda, Kirk McKenzie, Lam P K, Malcolm B Gray, Nergis Mavalvala, Nicolai Grosse, Ping Koy Lam, Schnupp L, Scully M O, Wu L-A   +13 more
core   +1 more source

Turbulence‐Resilient Coherent Receiver Array on CMOS‐Compatible Silicon Photonics for Free Space Optical Communications

Nanophotonics, Volume 15, Issue 5, 16 March 2026.
A CMOS‐compatible silicon‐photonic 4 × 4 coherent receiver array spatially samples turbulence‐distorted wavefronts and, with maximum‐ratio combining, enables signal recovery. Experimental BPSK tests under moderate turbulence approach theoretical combining efficiency, reducing BER from 1E‐2 to 1E‐15.
Alireza Fardoost, Fatemeh Ghaedi Vanani, Aneesh Sobhanan, Dhruvkumar Desai, Inwoong Kim, Olga Vassilieva, Paparao Palacharla, Guifang Li   +7 more
wiley   +1 more source

Modeling and Optimization of Frequency‐Doubled Radio‐Over‐Fiber Link Based on Deep Learning Technique

Advanced Photonics Research, Volume 7, Issue 3, March 2026.
This article proposes a deep learning (DL) approach for modeling and optimizing frequency‐doubled radio‐over‐fiber links. By collectively replacing traditional components with DL model, accurate system evaluation is achieved. Moreover, through an end‐to‐end architecture, performance optimization is accomplished.
Difei Shi, Xiangyan Meng, Hanxin Chen, Wei Li   +3 more
wiley   +1 more source

Specific Emitter Identification Using Convolutional Neural Network-Based IQ Imbalance Estimators

IEEE Access, 2019
Specific Emitter Identification is the association of a received signal to a unique emitter, and is made possible by the naturally occurring and unintentional characteristics an emitter imparts onto each transmission, known as its radio frequency ...
Lauren J. Wong, William Christopher Headley, Alan J. Michaels   +2 more
doaj   +1 more source

Flexible digital modulation and coding synthesis for satellite communications [PDF]

An architecture and a hardware prototype of a flexible trellis modem/codec (FTMC) transmitter are presented. The theory of operation is built upon a pragmatic approach to trellis-coded modulation that emphasizes power and spectral efficiency.
Budinger, James, Hoerig, Craig, Tague, John, Vanderaar, Mark   +3 more
core   +1 more source