Results 121 to 130 of about 491,261 (311)

Orthogonal Time Frequency Space Modulation Technology

, 2021
La presente investigación bibliográfica recopila los conceptos básicos de la tecnología de modulación en el Espacio de Tiempo-Frecuencia Ortogonal (OTFS), que será utilizada para la comunicación móvil de quinta generación (5G), la cual presenta ventajas inherentes frente a la modulación de Multiplexación por División de Frecuencia Ortogonal (OFDM ...
openaire   +1 more source

Enhanced Index Modulation Aided Orthogonal Time Frequency Space With Variable Active Grids and Multiple Constellations

IEEE Transactions on Vehicular Technology
Present orthogonal time frequency space modulation with index modulation (OTFS-IM) techniques activate a given number of grids in the delay-Doppler (DD) domain and employ fixed constellation as changing them would result in ambiguous detection. Motivated
Kai Zhang, Xue-Qin Jiang, Han Hai, Runhe Qiu, Shahid Mumtaz   +4 more
semanticscholar   +1 more source

Unlocking Photodetection Mode Switching from a Simple Lateral Design

Advanced Functional Materials, EarlyView.
A simple lateral 2D perovskite photodetector capable of switching among transient, continuous, and dual transient/continuous photoresponse modes is achieved by integrating photoconductive effects with capacitive coupling from the SiO2/Si substrate. Such light‐programmable photodetection mode switching enables triple‐channel information transmission and
Zijun (June) Yong, Keng‐Te Lin, Joel van Embden, Taimur Ahmed, Yumeng Du, Dashen Dong, Yiwen Mai, Junlin Lu, Sumeet Walia, Baohua Jia, Tianyi Ma   +10 more
wiley   +1 more source

Pulsed Orthogonal Time Frequency Space: A Fast Acquisition and High-Precision Measurement Signal for Low Earth Orbit Position, Navigation, and Timing

Remote Sensing
The recent rapid development of low Earth orbit (LEO) constellation-based navigation techniques has enhanced the ability of position, navigation, and timing (PNT) services in deep attenuation and interference environments.
Dong Fu, Honglei Lin, Ming Ma, Muzi Yuan, Gang Ou   +4 more
semanticscholar   +1 more source

Design Strategies and Emerging Applications of High‐Performance Flexible Piezoresistive Pressure Sensors

Advanced Functional Materials, EarlyView.
Flexible piezoresistive pressure sensors underpin wearable and soft electronics. This review links sensing physics, including contact resistance modulation, quantum tunneling and percolation, to unified materials/structure design. We highlight composite and graded architectures, interfacial/porous engineering, and microstructured 3D conductive networks
Feng Luo, Artur Ciesielski, Paolo Samorì   +2 more
wiley   +1 more source

Performance and Compensation of I/Q Imbalance in Differential STBC-OFDM

, 2016
Differential space time block coding (STBC) achieves full spatial diversity and avoids channel estimation overhead. Over highly frequency-selective channels, STBC is integrated with orthogonal frequency division multiplexing (OFDM) to achieve high ...
Al-Dhahir, Naofal, Chen, Lei, Helmy, Ahmed G., Li, Shaoqian, Yue, Guangrong   +4 more
core   +1 more source

Integrated Sensing and Communication via Orthogonal Time Frequency Space Signaling with Hybrid Message Passing Detection and Fractional Parameter Estimation. [PDF]

Sensors (Basel), 2023
Zhang J, Cai L, Liu H.
europepmc   +1 more source

Quasi-orthogonal space-time-frequency codes in MB-OFDM UWB

Computers & Electrical Engineering, 2010
Quasi-orthogonal space-time-frequency codes (QOSTFCs) will be examined in this paper to advance either data rate or error performance in recently proposed space-time-frequency coded multiband OFDM Ultra-wideband (STFC MB-OFDM UWB) communication systems.
Le Chung Tran, Alfred Mertins, Tadeusz A. Wysocki   +2 more
openaire   +3 more sources

How the Carrier Mobility and Seebeck Coefficient of Doped Semiconducting Polymers Are Controlled by Counterion Interactions and Mesoscale Order

Advanced Functional Materials, EarlyView.
Conventional doping of P3HT with F4TCNQ results in poor charge transport. However, when F4TCNQ is exchanged with LiTFSI, the transport characteristics are greatly enhanced. We find the increase in charge transport is directly related to an increase in the mesoscale ordering of P3HT, resulting in longer and better‐connected transport pathways.
Quynh M. Duong, Diego Garcia Vidales, Xinyu Liu, Charlene Z. Salamat, Austin Ready, Hashim Al Khunaizi, Mei Matsumoto, Alexander M. Spokoyny, Sarah H. Tolbert, Benjamin J. Schwartz   +9 more
wiley   +1 more source

Spatiospectral concentration in the Cartesian plane

, 2011
We pose and solve the analogue of Slepian's time-frequency concentration problem in the two-dimensional plane, for applications in the natural sciences.
Simons, Frederik J., Wang, Dong V.
core   +1 more source