Results 51 to 60 of about 723,859 (290)
Active plasmonic devices and optical metamaterials [PDF]
, 2009 We studied active near-infrared metamaterials based on phase transition of vanadium oxide thin films, asymmetrically coupled split-ring resonators for narrowing resonance line-widths , field effect modulation of plasmon propagation and 3D single layer ...
Atwater, Harry A. +8 more
core +1 more source
Vector OFDM With Index Modulation
IEEE Access, 2017 The concept of index modulation (IM) has gained increased attention in recent years. As a member of the IM family, orthogonal frequency division multiplexing with index modulation (OFDM-IM), which is able to convey additional information bits using the ...
Yun Liu +4 more
doaj +1 more source
Generalized Frequency Division Multiplexing With Flexible Index Modulation
IEEE Access, 2017 After the vision and the overall objectives of future wireless networks for 2020 and beyond have been defined, standardization activities for fifth generation (5G) wireless networks have been started.
Ersin Ozturk +2 more
doaj +1 more source
Performance Analysis of Novel Index Modulation-Based Non-Orthogonal Multiple Access Systems over Nakagami-m Fading Channels with Imperfect CSI [PDF]
Radioengineering, 2023 In this paper, a novel index modulation-based non-orthogonal multiple access (IM-NOMA) system is proposed and investigated for both perfect and imperfect channel state information (CSI) uncertainty over Nakagami-m fading channel.
H. M. Shwetha, S. Anuradha
doaj
Unified Power Allocation for Receive Spatial Modulation Based on Approximate Optimization
IEEE Access, 2018 In this paper, a novel unified power allocation (PA) framework is proposed for receive (pre-coding aided) spatial modulation (RSM). We find that the PA matrix design can be formulated as a non-convex quadratically constrained quadratic program (QCQP ...
Ping Yang +5 more
doaj +1 more source
A Novel Downlink IM-NOMA Scheme
IEEE Open Journal of the Communications Society, 2021 In the next generations of communication systems, resources' scarcity devolves to a more critical point as a consequence of the expected massive number of users to be served. Furthermore, the users' contradicting requirements on quality of service forces
Abdullateef Almohamad +3 more
doaj +1 more source
Upper-Bound Performance of a Wide-Band Adaptive Modem
, 1999 Adaptive modulation is applied in conjunction with a decision-feedback equalizer (DFE) in order to mitigate the effects of the slowly varying wide-band multipath Rayleigh fading channel in a noise-limited environment.
Hanzo, L., Wong, C.H.
core +2 more sources
Coherent phonon induced optical modulation in semiconductors at terahertz frequencies [PDF]
, 2013 The coherent modulation of electronic and vibrational nonlinearities in atoms and molecular gases by intense few-cycle pulses has been used for high-harmonic generation in the soft X-ray and attosecond regime, as well as for Raman frequency combs that ...
Constantinescu Anca Monia +4 more
core +2 more sources
, 2008 We address vortex solitons supported by optical lattices featuring modulation of both the linear and nonlinear refractive indices. We find that when the modulation is out-of-phase the competition between both effects results in remarkable shape ...
Abdullaev +21 more
core +1 more source
Clinical Insights Into Hypercalcemia of Malignancy in Childhood
Pediatric Blood &Cancer, EarlyView.ABSTRACT Hypercalcemia of malignancy (HCM) is a rare but life‐threatening metabolic emergency in children that occurs in less than 1% of pediatric cancer cases, with a reported incidence ranging from 0.4% to 1.0% across different studies. While it is observed in 10%–20% of adult malignancies, pediatric HCM remains relatively uncommon.
Hüseyin Anıl Korkmaz
wiley +1 more source