Results 31 to 40 of about 301,683 (298)

Cluster Index Modulation for mmWave Communication Systems

Frontiers in Communications and Networks, 2022
In this study, a novel cluster index modulation (CIM) scheme, which is based on indexing the available clusters in the environment, is proposed for future mmWave communication systems.
Mahmoud Raeisi, Asil Koc, Ertugrul Basar, Tho Le-Ngoc   +3 more
doaj   +1 more source

A Semidefinite Relaxation Approach to OFDM-IM Detection in Rapidly Time-Varying Channels

IEEE Access, 2018
In this paper, the signal detection of orthogonal frequency division multiplexing with index modulation (OFDM-IM) in the rapidly time-varying channel is studied.
Jianping Zheng, Hongmei Lv
doaj   +1 more source

Discrete Multitone Modulation for Maximizing Transmission Rate in Step-Index Plastic Optical Fibres [PDF]

, 2009
The use of standard 1-mm core-diameter step-index plastic optical fiber (SI-POF) has so far been mainly limited to distances of up to 100 m and bit-rates in the order of 100 Mbit/s.
Lee, S.C. Jeffrey; id_orcid, HENRIE P. A. VAN DEN BOOM, Philipp Rietzsch, S. C. JEFFREY LEE, Andreas Bluschke, Michael Matthews, Rainer Steglich, Lee, S.C. Jeffrey, Steglich, Rainer, Bosco, Gabriella, Sebastian Randel, ANTONIUS M. J. KOONEN, Antonius, M.J., Breyer, Florian, Bluschke, Andreas, Florian Breyer, van den Boom, Henrie P.A., Jeffrey Lee, S.C., Rietzsch, Philipp, Randel, Sebastian, Matthews, Michael, Gaudino, Roberto, Henrie, P.A., Koonen, Antonius M.J.   +23 more
core   +1 more source

Hierarchical Multi-Functional Layered Spatial Modulation

IEEE Access, 2018
In pursuit of optimal index modulation -aided multiple-input multiple-output (MIMO) systems, where information is implicitly conveyed by relying on the on/off mechanism of the system's components in addition to the classical amplitude, phase, or ...
Ibrahim A. Hemadeh, Mohammed El-Hajjar, Lajos Hanzo   +2 more
doaj   +1 more source

Precoder Index Modulation

CoRR, 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.
T. Lakshmi Narasimhan, A. Chockalingam
openaire   +2 more sources

Enhanced Coordinate Interleaved OFDM With Index Modulation

IEEE Access, 2017
Orthogonal frequency-division multiplexing with index modulation (OFDM-IM) has attracted much attention in recent years. In OFDM-IM, the information bits of a block are generally divided into several subblocks, each of which is further split into two ...
Yun Liu, Fei Ji, Hua Yu, Fangjiong Chen, Dehuan Wan, Beixiong Zheng   +5 more
doaj   +1 more source

OFDM With Hybrid Number and Index Modulation [PDF]

IEEE Access, 2020
A novel transmission scheme is introduced for efficient data transmission by conveying additional information bits through jointly changing the index and number of active subcarriers within each orthogonal frequency division multiplexing (OFDM) subblock. The proposed scheme is different from the conventional OFDM-subcarrier number modulation (OFDM-SNM)
Ahmad M. Jaradat, Jehad M. Hamamreh, Hüseyin Arslan   +2 more
openaire   +6 more sources

Recent Results From the EU POF-PLUS Project: Multi-Gigabit Transmission Over 1 mm Core Diameter Plastic Optical Fibers [PDF]

, 2011
Recent activity to achieve multi-gigabit transmission over 1 mm core diameter graded-index and step-index plastic optical fibers for distances up to 50 meters is reported in this paper.
Gaudino, R., Yang, H., R. Kruglov, Tangdiongga E., Koonen A. M. J., Kruglov R., R. Gaudino, Ziemann, O., Visani, D., Greiss, I., Yang H., VISANI, DAVIDE, Loquai S., Ouzzif, M., E. Tangdiongga, O. Ziemann, Ziemann O., Tangdiongga, E., I. Greiss, Kruglov, R., C. M. Okonkwo, S. Loquai, B. Charbonnier, Kruglov, R, Loquai, S., Visani D., Tangdiongga, E.; id_orcid, M. Ouzzif, Greiss, I, Okonkwo, C.M.; id_orcid, Charbonnier, B., A. M. J. Koonen, Charbonnier, B, Charbonnier B., Okonkwo, C.M., H. Yang, Koonen, A.M.J., Greiss I., Gaudino, Roberto, D. Visani, Ouzzif M., Okonkwo C. M.   +41 more
core   +1 more source

Performance of OFDM-IM Under Joint Hardware Impairments and Channel Estimation Errors Over Correlated Fading Channels

IEEE Access, 2017
Recent studies have proven the potential of orthogonal frequency division multiplexing with index modulation in improving the bit error rate performance and the spectral efficiency, where its performance is evaluated under the assumption of ideal ...
Asma Bouhlel, Stavros G. Domouchtsidis, Salama S. Ikki, Anis Sakly   +3 more
doaj   +1 more source

Knot modules and the Nakanishi index [PDF]

Proceedings of the American Mathematical Society, 2002
This paper is concerned with a knot invariant called the Nakanishi index. It is defined as the size of the smallest square matrix which presents the knot module as a \(\mathbb{Z}[t, t^{-1}]\)-module. This invariant seems to have first been defined by Kawauchi who proved that it coincides with the size of a minimal generating set for the knot module ...
Kearton, C., Wilson, S. M. J.
openaire   +2 more sources