Results 71 to 80 of about 106,474 (328)

Clustered-orthogonal frequency division multiplexing for power line communication: when is it beneficial?

IET Communications, 2014
This study presents a comprehensive analysis to highlight advantages and disadvantages, in terms of channel capacity and computational complexity (CC), of a so-called clustered-orthogonal frequency division multiplexing (OFDM) scheme for power line ...
Moises Vidal Ribeiro, G. R. Colen, F. P. V. Campos, Zhi Quan, H. Poor   +4 more
semanticscholar   +1 more source

Transmission of data with orthogonal frequency division multiplexing technique for communication networks using GHz frequency band soliton carrier

IET Communications, 2014
Microring resonators (MRRs) can be used to generate optical millimetre-wave solitons with a broadband frequency of 40-60 GHz. Non-linear light behaviours within MRRs, such as chaotic signals, can be used to generate logic codes (digital codes).
I. Amiri, Monireh Ebrahimi, A. H. Yazdavar, S. Ghorbani, S. E. Alavi, S. M. Idrus, J. Ali   +6 more
semanticscholar   +1 more source

Advanced Optical Integration Processes for Photonic‐Integrated Circuit Packaging

Advanced Materials Technologies, EarlyView.
Photonic integrated chip packaging is a growing technology that helps make devices faster, more efficient, and more compact by using light instead of electricity. This review highlights recent progress in making these chips work better at different levels, discusses current challenges like heat and alignment, and looks at future possibilities for ...
Keuntae Baek, Minhyeok Kim, Hak‐Sung Kim, Jinho Ahn, Hongyun So   +4 more
wiley   +1 more source

Adaptive-Modulation-Enabled WDM Impairment Reduction in Multichannel Optical OFDM Transmission Systems for Next-Generation PONs

IEEE Photonics Journal, 2010
The transmission performance of multichannel adaptively modulated optical orthogonal frequency-division multiplexing (AMOOFDM) signals is investigated numerically, for the first time, in optical-amplification-free and chromatic-dispersion-compensation ...
E. Giacoumidis, J. L. Wei, X. L. Yang, A. Tsokanos, J. M. Tang   +4 more
doaj   +1 more source

Pengaruh Frequency Selectivity Pada Orthogonal Frequency Division Multiplexing (OFDM) [PDF]

, 2013
Orthogonal Frequency Division Multiplexing (OFDM) adalah suatu nama khusus dari multicarrier, dimana suatu aliran data berkecepatan tinggi ditransmisikan melalui sejumlah subcarrier berkecepatan rendah.
Ali Mustofa, ST., MT, Fahima Ulfi Tazkia., Ir. Endah Budi P, MT
core  

How to Manufacture Photonic Metamaterials

Advanced Materials Technologies, EarlyView.
Metamaterials boast applications such as invisibility and “hyperlenses” with resolution beyond the diffraction limit, but these applications haven’t been exploited in earnest and the market for them hasn’t grown much likely because facile and economical methods for fabricating them without defect has not emerged.
Apurba Paul, Gregory Timp
wiley   +1 more source

Group-indexed orthogonal frequency division multiplexing index modulation aided performance trade off

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, Thangavelu Laxmikandan, Thirunavukkarasu Manimekalai   +2 more
doaj   +1 more source

Optical Modulator Optimization for Orthogonal Frequency-Division Multiplexing [PDF]

Journal of Lightwave Technology, 2009
Orthogonal frequency-division multiplexing (OFDM) has a high peak-to-average ratio (PAR), which can result in low optical power efficiency when modulated through a Mach-Zehnder (MZ) modulator. In addition, the nonlinear characteristic of the MZ can cause significant distortion on the OFDM signal, leading to in-band intermodulation products between ...
Joseph M. Kahn, Daniel J. F. Barros
openaire   +2 more sources

Incoherent Digital Holography Empowered by Wavefront and Information Engineering: A Review

Advanced Photonics Research, EarlyView.
Advancements in incoherent digital holography (IDH) have been achieved via wavefront engineering (using spatial light modulators, diffractive optics, and metasurfaces) and information engineering (using compressive sensing and deep learning). This paper presents an overview of IDH with wavefront and information engineering, paving the way toward its ...
Teruyoshi Nobukawa
wiley   +1 more source

Efficient VLSI implementation of FFT for orthogonal frequency division multiplexing applications

IET Circuits Devices Syst., 2014
In an orthogonal frequency division multiplexing (OFDM)-based digital transmitter, the inverse fast Fourier transform (IFFT) processing unit consumes the most hardware area and power, especially because of the twiddle multipliers in the Cooley–Tukey ...
V. Arunachalam, Alex Noel Joseph Raj
semanticscholar   +1 more source