Results 1 to 10 of about 191,818 (262)

Joint Antenna Selection and Adaptive Modulation in MIMO Systems in the Presence of CSI Imperfection

International Journal of Information and Communication Technology Research, 2011
This paper presents a strategy to combine the antenna selection technique and the adaptive modulation method for multiple input multiple output (MIMO) systems.
Mahshad Hamedanian, Abbas Mohammadi, Abdolali Abdipour   +2 more
doaj  

UAV-Assisted IRS System With Energy Harvesting: Enhanced Reliability in Critical Scenarios for 5G/6G Wireless Communication

IEEE Access
This paper proposes an UAV-assisted intelligent reflecting surface (IRS) system for improving the network performance between ground-to-ground (G2G) users in 5G/6G wireless communication.
Pankaj Kumar, Santhosha Kamath, Sam Darshi, Jen-Yi Pan, Muhammad Iqbal, Samar Shailendra, Vijay Mohan   +6 more
doaj   +1 more source

Uplink Transmit Power Control for Single-Carrier Grouped FDMA with Iterative Multiuser Detection

Applied Sciences, 2019
We consider an uplink power allocation scheme for single-carrier frequency-division multiple access (FDMA) with iterative multiuser detection, called single-carrier grouped FDMA (SC-GFDMA). SC-GFDMA is a non-orthogonal scheme in which several users share
Yong-Sang Cho, Yun-Seong Kang, Moonsik Min   +2 more
doaj   +1 more source

On the Design and Performance Analysis of Low-Correlation Compact Space-Multimode Diversity Stacked Microstrip Antenna Arrays for MIMO-OFDM WLANs over Statistically-Clustered Indoor Radio Channels [PDF]

Radioengineering, 2015
The support of high spectral efficiency MIMO spatial-multiplexing communication in OFDM-based WLAN systems conforming to IEEE 802.11n standard requires the design and use of compact antennas and arrays with low correlation ports.
A. Savaşcıhabeş, O. Ertuğ, E. Yazgan
doaj  

Performance Analysis of Millimeter Wave Massive MIMO Systems in Centralized and Distributed Schemes

IEEE Access, 2018
This paper considers downlink multi-user millimeter-wave massive multiple-input multiple-output (MIMO) systems in both centralized and distributed configurations, referred to as C-MIMO and D-MIMO, respectively.
Jing Li, Dian-Wu Yue, Yichuang Sun
doaj   +1 more source

Parallel Quadrature Spatial Modulation for Massive MIMO Systems With ICI Avoidance

IEEE Access, 2019
Despite its efficiency in conventional multiple-input multiple-output (MIMO) wireless systems, quadrature spatial modulation (QSM) becomes less efficient in massive MIMO systems since it does not adapt to the number of antennas but always uses one or two
Guosheng Huang, Chuanping Li, Sonia Aissa, Minghua Xia   +3 more
doaj   +1 more source

Enhancing the Coexistence of LTE and Wi-Fi in Unlicensed Spectrum Through Convolutional Neural Networks

IEEE Access, 2019
Over the last years, the ever-growing wireless traffic has pushed the mobile community to investigate solutions that can assist in more efficient management of the wireless spectrum.
Vasilis Maglogiannis, Adnan Shahid, Dries Naudts, Eli De Poorter, Ingrid Moerman   +4 more
doaj   +1 more source

Performance Analysis of Cooperative Quadrature Spatial Modulation System With Hybrid Decode-Amplify-Forward Relaying Protocol

IEEE Access
This paper introduces the cooperative quadrature spatial modulation (CQSM) system with hybrid decode-amplify-forward (HDAF) relaying protocol. Compered with the traditional CQSM system which only uses amplify-and-forward (AF) protocol and decode-and ...
Xiangyan Bu, Ke Pang
doaj   +1 more source

Evaluating spatial dependency of the spectral efficiency in trans-palpebral illumination for widefield fundus photography. [PDF]

Biomed Opt Express, 2023
Rahimi M, Rossi A, Son T, Toslak D, Le D, Abtahi M, Heiferman MJ, Chan RVP, Yao X.   +8 more
europepmc   +1 more source

Efficient Precoding and Power Allocation Techniques for Maximizing Spectral Efficiency in Beamspace MIMO-NOMA Systems. [PDF]

Sensors (Basel), 2023
Liu Y, Si L, Wang Y, Zhang B, Xu W.
europepmc   +1 more source