Results 21 to 30 of about 741,207 (289)
Enhancement of Spectral Efficiency FSO Links Using Linear Polarizer-Based MLPolSK Detection
IEEE 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
On the relation between energy efficiency and spectral efficiency of multiple-antenna systems [PDF]
, 2013 Motivated by the increasing interest in energy-efficient communication systems, the relation between energy efficiency (EE) and spectral efficiency (SE) for multiple-input-multiple-output (MIMO) systems is investigated in this paper.
Chen, Yan +4 more
core +1 more source
Spectrally efficient multiplexing of chaotic light [PDF]
Optics Letters, 2010 We numerically demonstrate multiplexing and demultiplexing of two distinct chaotic optical signals with strongly overlapped spectra, which are generated by mutually coupled external-cavity semiconductor lasers. Demultiplexing is performed by complete chaos synchronization, while the lasers at the receiving end are optically injected with the same ...
Rontani, Damien +3 more
openaire +3 more sources
IEEE 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
Binary CPMs With Improved Spectral Efficiency [PDF]
IEEE Communications Letters, 2016 We design new continuous phase modulation (CPM) formats which are based on the combination of a proper precoder with binary input and a ternary CPM. The proposed precoder constrains the signal phase evolution in order to increase the minimum Euclidean distance, and to limit the bandwidth expansion due to the use of a ternary CPM.
Messai, Malek +4 more
openaire +3 more sources
IEEE 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
Spectral efficiency of spectrum-pooling systems [PDF]
IET Communications, 2008 In this contribution, we investigate the idea of using cognitive radio to reuse locally unused spectrum to increase the total system capacity. We consider a multiband/wideband system in which the primary and cognitive users wish to communicate to different receivers, subject to mutual interference and assume that each user knows only his channel and ...
Haddad, Majed +2 more
openaire +2 more sources
A Comprehensive Performance Evaluation of Universal Filtered Multi-Carrier Technique
IEEE 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
IEEE 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
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Spectral efficiency of energy efficient multicarrier systems [PDF]
ACM SIGMETRICS Performance Evaluation Review, 2014 We investigate the achievable performances of multi-carrier energy efficient power control game. Both the simultaneous-move and the hierarchical games are addressed. For the first time, we derive analytical closed-form expressions of the spectrum coordination and the spectral efficiency of such models.
Haddad, Majed +3 more
openaire +1 more source