Results 11 to 20 of about 181,659 (263)
IEEE Access, 2020 The achievement of the boundary values of spectral efficiency is associated with the development of methods for generating and receiving signals with a compact spectrum. The reason is a constant increase in the capacity of existing communication channels
Sergey B. Makarov +6 more
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IEEE Access, 2022 Ultra densification of the number of antennas combined with the use of large bandwidths in the millimeter wave (mmWave) spectrum is considered one of the main methodologies to achieve the quality of service requirements for future generations of wireless
P. Higo Thaian da Silva +4 more
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Spectral efficiency of blackness induction [PDF]
Journal of the Optical Society of America A, 1984 The spectral efficiency of blackness induction was measured in three normal trichromatic observers and in one deuteranomalous observer. The psychophysical task was to adjust the radiance of a monochromatic 60-120' annulus until a 45' central broadband field just turned black and its contour became indiscriminable from a dark surrounding gap that ...
Werner, John S +3 more
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Spectrally-Efficient Continuous Phase Modulations [PDF]
2008 IEEE International Symposium on Information Theory, 2008 We investigate the spectral efficiency of continuous phase modulations (CPMs). To this end, we need an effective bandwidth definition for a CPM signal, whose power spectral density has in principle an infinite support. The definition we adopt is based on the spacing between adjacent carriers in a frequency division multiplexed CPM system.
Alan BARBIERI +2 more
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Generalized Model for Spectral Efficiency of Cellular Systems
The Journal of Engineering Research, 2006 A general mathematical model was used to study the spectral efficiency of cellular systems. The model took into consideration effects of first and second tier interference.
A.M. Abbosh
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Sensors, 2023 Non-Orthogonal Multiple Access (NOMA) has become a promising evolution with the emergence of fifth-generation (5G) and Beyond-5G (B5G) rollouts. The potentials of NOMA are to increase the number of users, the system’s capacity, massive connectivity, and ...
Syed Agha Hassnain Mohsan +5 more
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NOMA-Based VLC Systems: A Comprehensive Review
Sensors, 2023 The enhanced proliferation of connected entities needs a deployment of innovative technologies for the next generation wireless networks. One of the critical concerns, however, is the spectrum scarcity, due to the unprecedented broadcast penetration rate
Syed Agha Hassnain Mohsan +5 more
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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
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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
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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
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