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User spectral efficiency: Combining spectral efficiency with user experience [PDF]
2016 IEEE International Conference on Communications (ICC), 2016 Electromagnetic spectrum is a scarce resource. Spectrum licensing is estimated to consume about 20% of cellular operators' capital expenditure (CAPEX). One important measure of spectrum use is “spectral efficiency” (SE), which is the amount of data bandwidth that a specific technology can extract from a certain amount of radio spectrum and is measured ...
Hung Nguyen, Bruce S. Northcote
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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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ON THE SPECTRAL EFFICIENCY OF A SPHERE [PDF]
Progress 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 ...
Sven Nordebo, Mats Gustafsson
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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
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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
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Efficient generation and characterization of spectrally factorable biphotons [PDF]
Optics Express, 2017 Spectrally unentangled biphotons with high single-spatiotemporal-mode purity are highly desirable for many quantum information processing tasks. We generate biphotons with an inferred heralded-state spectral purity of 99%, the highest to date without any spectral filtering, by pulsed spontaneous parametric downconversion in a custom-fabricated ...
Jeffrey H. Shapiro +6 more
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Energy efficiency-spectral efficiency trade-off of transmit antenna selection [PDF]
, 2014 We investigate the energy efficiency-spectral efficiency (EE-SE) trade-off of transmit antenna selection/maximum ratio combining (TAS) scheme. A realistic power consumption model (PCM) is considered, and it is shown that using TAS can provide significant
Brante, Glauber +4 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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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
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SCMA Spectral and Energy Efficiency with QoS [PDF]
GLOBECOM 2020 - 2020 IEEE Global Communications Conference, 2020 GC
Kunlun Wang +3 more
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