Results 31 to 40 of about 191,818 (262)

Enhancement of Spectral Efficiency FSO Links Using Linear Polarizer-Based MLPolSK Detection

open access: yesIEEE Access, 2020
This paper proposes the enhancement of spectral efficiency (SE) by linear polarizer based multilevel linear polarization shift keying (MLPolSK) detection in free-space optical (FSO) communication.
Yan-Qing Hong   +2 more
doaj   +1 more source

Spectrum and Energy Efficient Resource Allocation With QoS Requirements for Hybrid MC-NOMA 5G Systems

open access: yesIEEE Access, 2018
In this paper, we investigate the resource allocation problem for achieving spectral efficiency (SE) and energy efficiency (EE) tradeoff with users' minimum rate requirements in hybrid multi-carrier non-orthogonal multiple access (MC-NOMA) systems which ...
Zhengyu Song, Qiang Ni, Xin Sun
doaj   +1 more source

ON THE SPECTRAL EFFICIENCY OF A SPHERE [PDF]

open access: yesProgress In Electromagnetics Research, 2007
In many cases it is desired to have both high capacity and small antennas in wireless communication systems. Unfortunately, the antenna performance deteriorate when the antennas get electrically small. In this paper fundamental limitations from antenna theory and broadband matching are used to analyze the spectral efficiency of an arbitrary antenna ...
Mats Gustafsson, Sven Nordebo
openaire   +1 more source

SCMA Spectral and Energy Efficiency With QoS [PDF]

open access: yesIEEE Access, 2021
Sparse code multiple access (SCMA) is one of the promising candidates for new radio access interface. The new generation communication system is expected to support massive user access with high capacity. However, there are numerous problems and barriers to achieve optimal performance, e.g., the multiuser interference and high power consumption.
S. Jaber, W. Chen, K. Wang
openaire   +2 more sources

Offloading Design for Energy and Spectral Efficiencies Tradeoff in Massive MIMO Enabled Heterogeneous Cellular Networks

open access: yesIEEE Access, 2019
To fully utilize the system resources and enhance the user experience, two types of offloading mechanisms are designed for massive MIMO (multiple-input-multiple-out) enabled heterogeneous cellular networks (HCNs).
Tianqing Zhou   +6 more
doaj   +1 more source

A Comprehensive Performance Evaluation of Universal Filtered Multi-Carrier Technique

open access: yesIEEE Access, 2019
The Internet of Things (IoT) and machine-to-machine (M2M) communication will play an important role in future communications, but there is currently no ultra-reliable low-latency wireless communication theory that guides its design.
Shanlin Wei   +3 more
doaj   +1 more source

A Single-Carrier Delay-and-Superposition Based High Spectral Efficiency Differential Chaos Shift Keying for Maritime Internet of Vessels

open access: yesIEEE Access, 2022
The fast growing Internet of Vessels (IoV) requires maritime communications to be more spectral efficient to make full use of the scarce maritime spectral resource, provide a high data transmission rate and support massive communication nodes to access ...
Xinyu Dou   +3 more
doaj   +1 more source

Performance Analysis of a Full-Duplex MIMO Decode-and-Forward Relay System With Self-Energy Recycling

open access: yesIEEE Access, 2020
This paper analyzes the performance of the full-duplex (FD) multiple-input-multiple-output (MIMO) decode-and-forward (DF) relay system in the presence of self-energy recycling (S-ER). Specifically, this work proposes an antenna allocation scheme for S-ER
Mohd Hamza Naim Shaikh   +2 more
doaj   +1 more source

Spectral Efficiency Considerations in 6G Networks

open access: yesIEEE Open Journal of the Communications Society
As wireless connectivity continues to evolve toward 6G, the demand to efficiently deliver higher throughput, lower latency, and improved reliability increases.
Joseph Boccuzzi
doaj   +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

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