Results 61 to 70 of about 5,997,708 (388)

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, Mazen O. Hasna, Saud Althunibat, Khalid Qaraqe   +3 more
doaj   +1 more source

Coordinate Interleaved OFDM With Power Distribution Index Modulation

IEEE Communications Letters, 2022
Orthogonal frequency division multiplexing with index modulation (OFDM-IM), which transmits information bits via $M$ -ary constellation symbols and indices of the active subcarriers, is a promising OFDM-based multicarrier transmission scheme.
Ali Tugberk Dogukan, Omer Furkan Tugtekin, E. Başar   +2 more
semanticscholar   +1 more source

Switching management in couplers with biharmonic longitudinal modulation of refractive index

, 2009
We address light propagation in couplers with longitudinal biharmonic modulation of refractive index in neighboring channels. While simplest single-frequency out-of-phase modulation allows suppression of coupling for strictly defined set of resonant ...
Ablowitz, Della Valle, Dreisow, Eisenberg, Garanovich, Grossmann, Iyer, Kartashov, Kartashov, Kartashov, Kartashov, Lederer, Longhi, Longhi, Longhi, Luo, Rosberg, Staliunas, Staliunas, Szameit, Szameit, Szameit, Szameit, Victor A. Vysloukh, Yaroslav V. Kartashov   +24 more
core   +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, Hase Muneaki, Katsuragawa Masayuki, Petek Hrvoje, 長谷 宗明   +4 more
core   +2 more sources

A Detailed Study of 2S 0114+650 with the RXTE [PDF]

, 2008
We present the results of a detailed study of the high mass X-ray binary 2S 0114+650 made with the pointed instruments onboard the Rossi X-ray Timing Explorer.
Aab, Apparao, Barlow, Blondin, Bonning, Chevalier, Corbet, Corral, Crampton, Crowther, Davies, De Luca, den Hartog, Ebisawa, Farrell, Farrell, Filippova, Finley, Finley, George, Gruber, Grundstrom, Haberl, Hall, Harding, Heindl, Hudec, Ikhsanov, Jahoda, Koenigsberger, Koenigsberger, Koenigsberger, Li, Masetti, Mattana, Meynet, Mukherjee, Nagase, Naik, Ogilvie, P. M. O'Neill, R. K. Sood, Reig, Rothschild, S. A. Farrell, S. Dieters, Schönherr, Sood, Soong, Taylor, Thompson, van Kerkwijk, Wang, Wasserman, Wen, White, Yamauchi   +56 more
core   +1 more source

Precoder Index Modulation

, 2014
Index modulation, where information bits are conveyed through antenna indices (spatial modulation) and subcarrier indices (subcarrier index modulation) in addition to information bits conveyed through conventional modulation symbols, is getting increased research attention.
Narasimhan, T. Lakshmi, Chockalingam, A.
openaire   +2 more sources

Power-dependent shaping of vortex solitons in optical lattices with spatially modulated nonlinear refractive index

, 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, Abdullaev, Belmonte-Beitia, Bludov, Blömer, Desyatnikov, Fibich, Fleischer, Kartashov, Kartashov, Kevrekidis, Kominis, Lluis Torner, Malomed, Neshev, Rapti, Sakaguchi, Sakaguchi, Victor A. Vysloukh, Yang, Yaroslav V. Kartashov, Öster   +21 more
core   +1 more source

A PRSZT Registry Analysis of Prognostic Factors Influencing Survival and Relapse Rates After Second Allogeneic Hematopoietic Stem Cell Transplantation in Pediatric Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT A second allogeneic (allo‐)hematopoietic stem cell transplantation (HSCT2) is a potential curative option for pediatric patients with acute lymphoblastic leukemia (ALL) following relapse after first allogeneic transplantation (HSCT1), but its efficacy is limited by high relapse rates and transplant‐related toxicity in highly pretreated ...
Ava Momm, Imme Haubitz, Rita Beier, Martin Zimmermann, Andrej Lissat, Peter Bader, Matthias Eyrich, Jan‐Henning Klusmann, Matthias Wölfl, Paul‐Gerhardt Schlegel, Verena Wiegering   +10 more
wiley   +1 more source

Photoelastically induced light modulation in gradient index lenses [PDF]

, 1993
A new photoelastic light modulator is demonstrated based on the modulation of the birefringence and of the index profile in graded index lenses. Using the birefringence modulation we obtained 35% modulation depth in a quarter-pitch lens and 65% using a ...
Albert, Badoz, Billardon, C. N. Pannell, Canit, Canit, Canit, Chabay, Cheng, I. Abdulhalim, Jasperson, Kemp, Modine, Mollenauer, Siegman, Williams   +15 more
core   +1 more source