Results 21 to 30 of about 200,328 (232)
Design of Power Location Coefficient System for 6G Downlink Cooperative NOMA Network
Energies, 2022 Cooperative non-orthogonal multiple access (NOMA) is a technology that addresses many challenges in future wireless generation networks by delivering a large amount of connectivity and huge system capacity.
Mohamed Hassan +5 more
doaj +1 more source
Capacity Comparison between MIMO-NOMA and MIMO-OMA with Multiple Users in a Cluster [PDF]
, 2017 In this paper, the performance of multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) is investigated when multiple users are grouped into a cluster.
Dobre, Octavia A. +4 more
core +1 more source
Performance Analysis of Physical Layer-Based Multiple-Input Multiple-Output on WiMAX (MIMO-WiMAX)
Engineering Proceedings, 2023 High data transmission rates over wide regions and to clients in locations where broadband service is not accessible are provided by WiMAX, based on IEEE 802.16 standards for Broadband Wireless Access (BWA).
Ambidi Naveena, Udataneni Divya
doaj +1 more source
Novel Method for Improving the Capacity of Optical MIMO System Using MGDM [PDF]
, 2014 In current local area networks, multimode fibers (MMFs), primarily graded index (GI) MMFs, are the main types of fibers employed for data communications.
Aggoun, A. +4 more
core +6 more sources
Tikrit Journal of Engineering Sciences, 2021 The future wireless communication requires a reliable transmission at high data rates, so the transmission over frequency-selective fading Multiple-Input–Multiple-Output MIMO channels become interesting since the capacity of "MIMO" channels expressions ...
Maha Monther Shahab +2 more
doaj +1 more source
MIMO Radar Ambiguity Properties and Optimization Using Frequency-Hopping Waveforms [PDF]
, 2008 The concept of multiple-input multiple-output (MIMO) radars has drawn considerable attention recently. Unlike the traditional single-input multiple-output (SIMO) radar which emits coherent waveforms to form a focused beam, the MIMO radar can transmit ...
Chen, Chun-Yang, Vaidyanathan, P. P.
core +2 more sources
Duality of antennas and subcarriers in massive MIMO-OFDM downlink system [PDF]
, 2015 Massive multiple-input-multiple-output (MIMO) can significantly outperform conventional MIMO in terms of spectrum efficiency and link reliability. For massive MIMO, there are still theoretical and practical issues that have to be addressed.
Bannour, Ahmed, Sun, Yichuang
core +2 more sources
Transmit Diversity in the Downlink for the TETRA-TEDS System
Journal of Telecommunications and Information Technology, 2014 In the paper a proposal for the improvement of performance for the TETRA Enhanced Data System (TEDS) employing transmit diversity based on two antennas in the downlink is described.
Dominik A. Rutkowski +1 more
doaj +1 more source
Early Neighbor Rejection-Aided Tabu Search Detection for Large MIMO Systems
Applied Sciences, 2021 In this study, a low complexity tabu search (TS) algorithm for multiple-input multiple-output (MIMO) systems is proposed. To reduce the computational complexity of the TS algorithm, early neighbor rejection (ENR) and layer ordering schemes are employed ...
Uzokboy Ummatov +3 more
doaj +1 more source
Study of Clustering Solutions for Scalable Cell-Free Massive MIMO
IEEE Access, 2023 In response to the requirements of 5G and beyond, cell-free systems have emerged to ensure uniform service throughout the area. However, the idea of having no cells leads to a considerably large monolithic system, which is not scalable.
Danaisy Prado-Alvarez +4 more
doaj +1 more source