Results 51 to 60 of about 122,557 (242)
A Comparison of CDMA and Frequency Hopping in a Cellular Environment [PDF]
, 1992 This paper compares the performances of direct sequence code division multiple access (CDMA) and frequency hopping (FH) schemes in a cellular multiuser environment.
Mandell, Michael I., McEliece, Robert J.
core +1 more source
, 2007 Burts-by-burst (BbB) adaptive high-speed downlink packet access (HSDPA) style multicarrier systems are reviewed, identifying their most critical design aspects.
Choi, B.J., Hanzo, Lajos
core +1 more source
Time-Hopping Multicarrier Code-Division Multiple-Access [PDF]
, 2006 A time-hopping multicarrier code-division multiple-access (TH/MC-CDMA) scheme is proposed and investigated. In the proposed TH/MC-CDMA each information symbol is transmitted by a number of time-domain pulses with each time-domain pulse modulating a ...
Lie-liang Yang, Senior Member
core +2 more sources
Advanced Energy Materials, Volume 15, Issue 33, September 2, 2025.Photocatalytic N₂ reduction is a sustainable method for ammonia production. Au nanostars (AuNST) with TiO2 excel, especially when encased in mesoporous silica, enhancing stability and selectivity without scavengers. Electromagnetic fields at nanostar spikes drive hot‐electron transfer to TiO2 for N2 reduction under visible light, while hot holes ...
Yoel Negrín‐Montecelo +8 more
wiley +1 more source
Complexity, 2022 Extreme Learning Machine (ELM) is widely used in various fields because of its fast training and high accuracy. However, it does not primarily work well for Domain Adaptation (DA) in which there are many annotated data from auxiliary domain and few even ...
Shaofei Zang +5 more
doaj +1 more source
, 2010 The so-called receiver multiuser diversity aided multistage minimum mean-square error multiuser detector (RMD/MS-MMSE MUD), which was proposed previously by the author, is investigated in the context of the direct-sequence code-division multiple-access ...
Yang, Lie-Liang
core +1 more source
Self‐Assembly Pathway Influence on Dehydropeptide‐Based Gel Properties and Drug Release
Macromolecular Bioscience, Volume 25, Issue 9, September 2025.In this work, it is explored how the gelation conditions affect the morphology, mechanical properties, and drug release of dehydropeptide‐based gels. The naphthalene‐capped dehydropeptide forms a crystal structure with a pore diameter of ≈4.08 Å. Gelation conditions can influence gel stiffness by nearly three orders of magnitude, in which the assembly ...
Sérgio R. S. Veloso +11 more
wiley +1 more source
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