Results 11 to 20 of about 12,838 (263)
OFDM With Hybrid Number and Index Modulation
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.
Ahmad M. Jaradat +2 more
doaj +3 more sources
Experimental demonstration of optical OFDM with subcarrier index modulation for IM/DD VLC [PDF]
, 2019 We for the first time experimentally demonstrate an IM/DD VLC system using optical OFDM with subcarrier index modulation (OFDM-SIM) and digital pre-equalization. Experimental results show that OFDM-SIM achieves greatly improved BER performance than classical OFDM.
Chen, Chen +5 more
core +4 more sources
In-phase and quadrature filter shape index modulation
EURASIP Journal on Wireless Communications and Networking, 2023 This paper proposes a novel modulation scheme called “In Phase and Quadrature-Filter Shape Index Modulation” (IQ-FSIM). It aims to enhance the spectral/energy efficiencies (SE/EE) while generalizing several existing modulations and index modulation (IM ...
Majed Saad +4 more
doaj +2 more sources
Wavelet Transform Aided Single-Carrier FDMA With Index Modulation
IEEE Open Journal of Vehicular TechnologySingle-carrier frequency-division multiple access (SC-FDMA) is a well-known multiuser transmission method for uplink communications owing to its low peak-to-average power ratio (PAPR) characteristics. Simultaneously, index modulation (IM) has been widely
Zhou Lu +2 more
doaj +2 more sources
OFDM transmission scheme with subcarrier supply index modulation [PDF]
Tongxin xuebao, 2023 To address the drawback that subcarrier activation pattern (SAP) of the orthogonal frequency division multiplexing with index modulation (OFDM-IM) cannot match the binary numbers which affects the system performance, the orthogonal frequency division ...
Yi GUO +3 more
doaj +4 more sources
, 2021 *Çelik, Yasin ( Aksaray, Yazar )Emerging systems such as Internet-of-things (IoT) and machine-to-machine (M2M) communications have strict requirements on the power consumption of used equipments and associated complexity in the transceiver design.
Çelik, Yasin +6 more
core +1 more source
IEEE Access, 2022 In this paper, it is proposed to enhance coherent optical orthogonal frequency-division multiplexing (OFDM) system by using index modulation in terms of bit error rate (BER) and spectral efficiency for different levels of the fiber nonlinearity.
Ahmet Guner
doaj +1 more source
Hamming Distance Optimized Underwater Acoustic OTFS-IM Systems
Entropy, 2023 The orthogonal time frequency space (OTFS) modulation technique can provide reliable communication in time-varying channels. Due to the dispersive characteristics of underwater acoustic channels, this paper proposes an OTFS-IM underwater acoustic ...
Xiaopeng Guo +4 more
doaj +1 more source
Subcarrier Grouping-Enabled Improvement in Transmission Performance of Subcarrier Index-Power Modulated Optical OFDM for IM/DD PON Systems [PDF]
Journal of Lightwave Technology, 2018 As an improved variant of a previously published subcarrier index-power modulated optical orthogonal frequency division multiplexing (SIPM-OOFDM), a signal transmission technique termed SIPM-OOFDM with subcarrier grouping (SIPM-SG-OOFDM) is proposed and investigated for the first time.
Fadi Halabi +4 more
openaire +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 +23 more
core +1 more source