Results 71 to 80 of about 78,274 (209)

Joint Design of Space-Time Transmit and Receive Weights for Colocated MIMO Radar

open access: yesSensors, 2018
Compared with single-input multiple-output (SIMO) radar, colocated multiple-input multiple-output (MIMO) radar can detect moving targets better by adopting waveform diversity.
Ze Yu   +3 more
doaj   +1 more source

Linear Precoding for MIMO Channels with QAM Constellations and Reduced Complexity

open access: yes, 2016
In this paper, the problem of designing a linear precoder for Multiple-Input Multiple-Output (MIMO) systems in conjunction with Quadrature Amplitude Modulation (QAM) is addressed.
Ayanoglu, Ender, Ketseoglou, Thomas
core  

Local valuation of ecosystem services from protected areas along a forest–savanna gradient in West Africa

open access: yesPeople and Nature, Volume 8, Issue 5, Page 1419-1436, May 2026.
Abstract Understanding how local communities perceive and prioritise ecosystem services (ES) across diverse ecological contexts is essential for improving protected area (PA) management. However, most studies focus on single ecosystems and lack cross‐ecological comparisons. This study aimed to explore how communities living in and around PAs in Ghana's
Jerry Owusu Afriyie, Pavla Hejcmanová
wiley   +1 more source

Eight-Port MIMO Array Using Characteristic Mode Theory for 5G Smartphone Applications

open access: yesIEEE Access, 2019
An 8-port multiple-input multiple-output (MIMO) array operating in the long-term evolution (LTE) band 42 (3400-3600 MHz) based on the characteristic mode theory (CMT) is described.
Ying Liu   +4 more
doaj   +1 more source

A Survey of Fractional Order Calculus Applications of Multiple-Input, Multiple-Output (MIMO) Process Control

open access: yesFractal and Fractional, 2020
Multiple-input multiple-output (MIMO) systems are usually present in process systems engineering. Due to the interaction among the variables and loops in the MIMO system, designing efficient control systems for both servo and regulatory scenarios remains
Alexandre Marques de Almeida   +2 more
doaj   +1 more source

Conjugate Gradient-based Soft-Output Detection and Precoding in Massive MIMO Systems

open access: yes, 2014
Massive multiple-input multiple-output (MIMO) promises improved spectral efficiency, coverage, and range, compared to conventional (small-scale) MIMO wireless systems.
Cavallaro, Joseph R.   +3 more
core   +1 more source

Location‐Assisted Graph‐Based User Scheduling in Multi‐User MIMO LEO NTN Systems

open access: yesInternational Journal of Satellite Communications and Networking, Volume 44, Issue 3, Page 275-287, May/June 2026.
ABSTRACT This paper addresses user clustering and scheduling for multi‐user MIMO low Earth orbit nonterrestrial network systems in full frequency reuse. Since the number of on‐ground user terminals is usually much higher than the number of on‐board LEO satellite antennas, user scheduling becomes a fundamental task.
Bilal Ahmad   +4 more
wiley   +1 more source

Joint Processing of Pilot and Data for Massive MIMO Systems in Ricean Fading Channels

open access: yesIEEE Access, 2019
Besides the pilot symbols, the received data signals also contain some extra channel state information (CSI), which can be exploited to further improve the channel estimation accuracy.
Yuanxue Xin   +5 more
doaj   +1 more source

Electromagnetic Perception With Artificial Intelligence‐Empowered Programable Metasurface: From Data‐Driven Imaging to Semantic Sensing

open access: yesAdvanced Photonics Research, Volume 7, Issue 4, April 2026.
This review chronicles the evolution of intelligent electromagnetic (EM) perception systems empowered by metasurfaces and artificial intelligence. The progression from data‐driven imaging with implicit priors to semantic sensing with explicit priors is systematically reviewed.
Xingrui Zhou   +5 more
wiley   +1 more source

Semi-blind adaptive spatial equalisation for MIMO systems with high-order QAM signalling

open access: yes, 2008
This contribution investigates semi-blind adaptive spatial filtering or equalisation for multiple-input multiple-output (MIMO) systems that employ high-throughput quadrature amplitude modulation (QAM) signalling.
Chen, Sheng, Hanzo, Lajos, Yao, Wang
core  

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