Results 41 to 50 of about 4,006 (196)
Sliding Mode Control in Aerospace Applications: A Survey
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley +1 more source
A study of performance and complexity for IEEE 802.11n MIMO-OFDM GIS solutions [PDF]
, 2004 This paper investigates the point-to-point PHY layer performance of two newly proposed IEEE 802.11n candidate solutions by suggesting extensions to 802.11a.
Nix, AR +5 more
core +1 more source
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT The integration of low Earth orbit (LEO) satellite constellations with commercial aircraft communication systems presents critical challenges in maintaining continuous connectivity during dynamic flight conditions. Current geostationary satellite systems suffer from high round‐trip latency (>$$ > $$ 500 ms) and inadequate coverage at high ...
Raúl Parada +4 more
wiley +1 more source
Joint channel estimation and multi-user detection for SDMA/OFDM based on dual repeated weighted boosting search [PDF]
, 2011 A joint channel estimation and Multi-User Detection (MUD) scheme is proposed for multi-user Multiple-Input Multiple-Output (MIMO) Space Division Multiple Access / Orthogonal Frequency-Division Multiplexing (SDMA/OFDM) systems.
Sheng Chen +8 more
core +1 more source
Jurnal EltekWiFi adalah teknologi nirkabel yang sangat digunakan dalam jaringan komunikasi modern. Namun, salah satu kelemahannya adalah redaman atau penghalang yang dapat mengurangi kualitas transmisi sinyal.
Hadiwiyatno Hadiwiyatno +2 more
doaj +1 more source
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT Low Earth Orbit (LEO) satellite constellations offer unprecedented opportunities for global broadband connectivity but pose significant beamforming challenges due to rapid platform motion and stringent onboard hardware constraints. Fully digital architectures, while optimal in theory, remain impractical for satellite payloads, motivating ...
Mohammad Momani +2 more
wiley +1 more source
IEEE AccessThe WiFi 6E extends the WiFi 6 operation in the 6 GHz band and features the $8\times8$ MIMO system. Recently, many countries have also made the lower 6 GHz band (5.925-6.425 GHz) available for the license-exempt wireless local area network, including ...
Kin-Lu Wong +3 more
doaj +1 more source
Key Technical Fields and Future Outlooks of Space Manipulators: A Survey
SmartBot, EarlyView.This paper systematically reviews the technological development of space manipulators, emphasizing the unique challenges posed by space environments. It examines four areas: structural design, modeling, planning, and control, while introducing typical ground test platforms.
Gang Chen +12 more
wiley +1 more source
Portable Radar for Noncontact Heart Rate Monitoring and Estrus Detection in Dairy Cows
IEEJ Transactions on Electrical and Electronic Engineering, EarlyView.This study introduces a portable radar system for real‐time monitoring of respiratory and heart rates in dairy cows. It uses millimeter‐wave Frequency Modulated Continuous Wave (FMCW) radar to perform noncontact physiological sensing, reducing behavioral disturbance. The radar system's design prioritizes portability, cost‐effectiveness, and robustness,
Yingxiu Li +7 more
wiley +1 more source
Exploiting multiple antennas for synchronization [PDF]
, 2009 Orthogonal frequency-division multiplex (OFDM) offers a low-complexity solution to equalization in multipath channels but does so by increasing the symbol period.
McLaughlin, Stephen; id_orcid +4 more
core +1 more source