Results 51 to 60 of about 5,341,111 (402)
Rapidly reconfigurable optically induced photonic crystals in hot rubidium vapor [PDF]
, 2013 Through periodic index modulation, we create two different types of photonic structures in a heated rubidium vapor for controlled reflection, transmission and diffraction of light.
Cohen, Raphael +5 more
core +3 more sources
Bigrassmannian permutations and Verma modules [PDF]
Selecta Mathematica volume 27:55 (2021), 2020 We show that bigrassmannian permutations determine the socle of the cokernel of an inclusion of Verma modules in type $A$. All such socular constituents turn out to be indexed by Weyl group elements from the penultimate two-sided cell. Combinatorially, the socular constituents in the cokernel of the inclusion of a Verma module indexed by $w\in S_n ...
arxiv +1 more source
Log -modules and index theorems [PDF]
Forum of Mathematics, Sigma, 2021 Abstract We study log $\mathscr {D}$ -modules on smooth log pairs and construct a comparison theorem of log de Rham complexes. The proof uses Sabbah’s generalized b-functions. As applications, we deduce a log index theorem and a Riemann-Roch type formula for perverse sheaves on smooth quasi-projective varieties.
Lei Wu, Peng Zhou
openaire +2 more sources
Linear Constellation Precoded OFDM With Interleaved Subcarrier Index Modulation
IEEE Access, 2019 Orthogonal frequency-division multiplexing with index modulation (OFDM-IM) is an emerging and promising multicarrier transmission technique; however, frequency diversity achievement requires further investigation for the OFDM-IM.
Qingbo Wang +3 more
doaj +1 more source
ETRI Journal, 2022 In this study, a novel group-indexed orthogonal frequency division multiplexing index modulation (OFDM-IM) scheme is proposed to achieve a tradeoff between spectral efficiency (SE) and bit-error-rate (BER) performance.
Thomas Wilfred Edison Athisaya Anushya +2 more
doaj +1 more source
LDPC Decoding With Low Complexity for OFDM Index Modulation
IEEE Access, 2021 In this paper, the posterior probabilities of the low-density parity check (LDPC) coded bits are derived for the orthogonal frequency division multiplexing index modulation (OFDM-IM) system to reduce the implementation complexity of LDPC decoding without
Eunchul Yoon +3 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
Intelligent Time-Varying Metasurface Transceiver for Index Modulation in 6G Wireless Networks [PDF]
IEEE Antennas and Wireless Propagation Letters, 2020 Index modulation (IM) is one of the candidate technologies for the upcoming sixth-generation (6G) wireless communications networks. In this letter, we propose a space-time-modulated reconfigurable intelligent metasurface (RI-MTS) that is configured to ...
J. Hodge, K. Mishra, A. Zaghloul
semanticscholar +1 more source
Decomposable Specht modules indexed by bihooks [PDF]
Pacific Journal of Mathematics, 2020 46 pages.
Sutton, Louise, Speyer, Liron
openaire +5 more sources
Design of OFDM-IM system based on IRS-assisted
Dianxin kexue, 2023 Index modulation (IM) and intelligent reflecting surface (IRS) are emerging mobile communication technologies.In order to improve the reliability of traditional orthogonal frequency division multiplexing (OFDM) system, an orthogonal frequency division ...
Mengmeng ZHAO, Liming HE, Fangfang LIU
doaj