Results 51 to 60 of about 54,084 (297)

Performance enhancement of multiuser MIMO wireless communication systems [PDF]

, 2002
This paper describes a new approach to the problem of enhancing the performance of a multiuser multiple-input-multiple-output (MIMO) system for communication from one base station to many mobile stations in both frequency-flat and frequency-selective ...
Letaief, KB, Murch, RD, Wong, KK
core   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Printed Integrated Logic Circuits Based on Chitosan‐Gated Organic Transistors for Future Edible Systems

Advanced Functional Materials, EarlyView.
Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco, Valerio Francesco Annese, Valerio Galli, Ilaria Penna, Debora Russo, Marina Veronesi, Rita Scarpelli, Stefania Sabella, Mario Caironi   +8 more
wiley   +1 more source

Intelligence Enabled by 2D Metastructures in Antennas and Wireless Propagation Systems

IEEE Open Journal of Antennas and Propagation, 2022
The development of the next generation of wireless systems is bringing renewed attention to the physical layer of the communication link. Indeed, the new low-latency requirements cannot be satisfied relying only upon the extreme virtualization of the ...
Mirko Barbuto, Zahra Hamzavi-Zarghani, Michela Longhi, Angelica Viola Marini, Alessio Monti, Davide Ramaccia, Stefano Vellucci, Alessandro Toscano, Filiberto Bilotti   +8 more
doaj   +1 more source

Active textile antennas in professional garments for sensing, localisation and communication [PDF]

, 2014
New wireless wearable monitoring systems integrated in professional garments require a high degree of reliability and autonomy. Active textile antenna systems may serve as platforms for body-centric sensing, localisation, and wireless communication ...
Agneessens, Sam, Declercq, Frederick, Dierck, Arnaut, Rogier, Hendrik, Spinnewyn, Bart, Stockman, Gert-Jan, Vallozzi, Luigi, Van Torre, Patrick, Vande Ginste, Dries, Vanfleteren, Jan, Vervust, Thomas   +10 more
core   +2 more sources

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

Advanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner, Julian Burkhart, Kateryna Borysova, Chiara Mazzariol, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

Direction of Arrival Estimation with a Novel Single-Port Smart Antenna

EURASIP Journal on Advances in Signal Processing, 2004
A novel direction of arrival (DOA) estimation technique that uses the conventional multiple-signal classification (MUSIC) algorithm with periodic signals is applied to a single-port smart antenna.
Karmakar Nemai C, Sun Chen
doaj   +1 more source

Smart, Bio‐Inspired Polymers and Bio‐Based Molecules Modified by Zwitterionic Motifs to Design Next‐Generation Materials for Medical Applications

Advanced Functional Materials, EarlyView.
Bio‐based and (semi‐)synthetic zwitterion‐modified novel materials and fully synthetic next‐generation alternatives show the importance of material design for different biomedical applications. The zwitterionic character affects the physiochemical behavior of the material and deepens the understanding of chemical interaction mechanisms within the ...
Theresa M. Lutz, Jonas De Breuck, Sahar Salehi, Meike N. Leiske   +3 more
wiley   +1 more source

Review on Multifunctional Pattern and Polarization Reconfigurable Antennas

IEEE Access
This paper presents a detailed review of multifunctional pattern and polarization reconfigurable antennas, highlighting their potential to enhance performance of the wireless communication systems. These adaptable antennas offer versatile functionalities,
Venkataswamy Suryapaga, Vikas V. Khairnar   +1 more
doaj   +1 more source

Revisiting smart antenna array design with multiple interferers using basic adaptive beamforming algorithms: Comparative performance study with testbed results

Engineering Reports, 2021
Smart antennas are becoming popular in the area of cellular wireless communication for capacity enhancement and reduction of the multipath effect and interference. The demand for smart antennas is widely increasing as 5G cellular communication evolves to
SK Imtiaj, Iti Saha Misra, Sandipan Bhattacharya   +2 more
doaj   +1 more source