Results 51 to 60 of about 31,714 (226)
AIThis paper presents the key results of a large-scale empirical study on the adoption of Generative AI (GenAI) by the Joint Research Centre (JRC), the European Commission’s science-for-policy department.
Bertrand De Longueville +6 more
doaj +1 more source
Solar‐Driven Photocatalytic N2 Reduction to Ammonia Using Plasmonic Au@NiZIF‐8 MOF Hybrids
Advanced Optical Materials, Volume 13, Issue 34, December 2, 2025.AuNSTs@NiZIF‐8 core‐shell photocatalysts are engineered for plasmon‐driven N2 reduction under visible light. The enhancement of Ni absorption, improving the efficiency of the metal center catalysts through the nanoantenna effect of the AuNP, combined with the injection of hot electrons and holes into the orbitals of the Ni atoms, results in a hybrid ...
Belén Arjones‐Fernández +8 more
wiley +1 more source
Fractionally Spread Multicarrier CDMA: A Multiple-Access Scheme for Various Wireless Channels [PDF]
, 2003 In multicarrier code-division multiple-access (MCCDMA) the total system bandwidth is divided into a number of subbands, where each subband may use direct-sequence (DS) spreading and each subband signal is transmitted using a subcarrier frequency. In this
Yang, L-L., Hanzo, L.
core
Ténica de Acceso Múltiple de Radio WCDMA
Prisma Tecnológico, 2009 El presente artículo aborda los conceptos de acceso múltiple por división de códigos y ensanchamiento de espectro mediante códigos. Se explica cómo se generan y utilizan los códigos ortogonales y de pseudoruido, los cuales esparcen, canalizan y mezclan ...
Javier Castillo, Fernando Medina
doaj
CDMA/OTFS Sensing Outperforms Pure OTFS at the Same Communication Throughput
IEEE Open Journal of Vehicular TechnologyThere is a dearth of publications on the subject of spreading-aided Orthogonal Time Frequency Space (OTFS) solutions, especially for Integrated Sensing and Communication (ISAC), even though Code Division Multiple Access (CDMA) assisted multi-user OTFS ...
Hugo Hawkins +3 more
doaj +1 more source
Sensors, 2013 Due to the characteristics of underwater acoustic channel, media access control (MAC) protocols designed for underwater acoustic sensor networks (UWASNs) are quite different from those for terrestrial wireless sensor networks.
Huifang Chen +3 more
doaj +1 more source
Identity‐Enabled CDMA LiDAR for Massively Parallel Ranging with a Single‐Element Receiver
Laser &Photonics Reviews, Volume 19, Issue 23, December 3, 2025.A novel LiDAR system integrates CDMA modulation with a single‐element detector to achieve massive channel parallel 3D imaging. By using a user identification code and a correlation‐based feedback loop, it overcomes signal collisions and the near‐far problem.
Yixiu Shen, Zi Heng Lim, Guangya Zhou
wiley +1 more source
Performance of Broadband Multicarrier DS-CDMA using Space-Time Spreading-Assisted Transmit Diversity [PDF]
, 2005 In this contribution multicarrier direct-sequence code-division multiple-access (MC DS-CDMA) using space–time spreading (STS)-assisted transmit diversity is investigated in the context of broadband communications over frequency-selective Rayleigh-fading ...
Yang, L-L., Hanzo, L.
core
Genetic algorithm assisted Joint multiuser symbol detection and fading channel estimation for synchronous CDMA systems [PDF]
, 2001 A novel multiuser code division multiple access (CDMA) receiver based on genetic algorithms is considered, which jointly estimates the transmitted symbols and fading channel coefficients of all the users.
Hanzo, L., Yen, K.
core +1 more source
Advanced Energy Materials, Volume 15, Issue 41, November 4, 2025.Layered halide double perovskites have emerged as promising alternatives to toxic lead‐based low‐dimensional perovskite materials for more sustainable optoelectronics. Their molecular design and its impact on the material characteristics, as well as the resulting functionality, is reviewed while discussing challenges and opportunities for future ...
Maryam Ghasemi +4 more
wiley +1 more source