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Novel Unipolar Orthogonal Frequency Division Multiplexing (U-OFDM) for Optical Wireless
2012 IEEE 75th Vehicular Technology Conference (VTC Spring), 2012A novel modulation technique coined U-OFDM is proposed. U-OFDM uses different time sample states and an innovative rearrangement of the Orthogonal Frequency Division Multiplexing (OFDM) frame which allow for the creation of unipolar OFDM signals required for Optical Wireless Communication (OWC) with Light Emitting Diodes (LEDs).
Dobroslav Tsonev +2 more
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Design and Simulation of Orthogonal Frequency-Division Multiplexing (OFDM) Signaling
2021The orthogonal frequency-division multiplexing (OFDM) is a modulation scheme which is spectrally efficient and which decomposes one carrier into several subcarriers. Each subcarrier is orthogonal, allowing the transfer of data on each subcarrier simultaneously.
Bin Hu +5 more
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Analysis of the effects of phase-noise in orthogonal frequency division multiplex (OFDM) systems
Proceedings IEEE International Conference on Communications ICC '95, 2002In OFDM transmission schemes, phase-noise from oscillator instabilities in the receiver is a potentially serious problem, especially when bandwidth efficient, high order signal constellations are employed. The paper analyses the two effects of phase-noise: inter-carrier interference (ICI) and a phase error common to all OFDM sub-carriers.
Robertson, P., Kaiser, S.
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Orthogonal Frequency Division Multiplexing (OFDM)
2008 China-Japan Joint Microwave Conference, 2008In broadband wireless system, the signal energy is scattered and reflected from objects in the environment, components of the signal arriving at the receiver are spread out over a longer period of time than is desirable. The challenge is then to provide a high-performance reliable data link that can operate with the restricted receiver power levels ...
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Developments in orthogonal frequency division multiplexing (OFDM) system-a survey
2011 Second Asian Himalayas International Conference on Internet (AH-ICI), 2011In today's communication scenario, high data rate single-carrier transmission may not be feasible due to too much complexity of the equalizer in the receiver. To overcome the frequency selectivity of the wideband channel experienced by single-carrier transmission, multiple carriers can be used for high rate data transmission.
M N Suma, B. Kanmani
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2020 IEEE Globecom Workshops (GC Wkshps, 2020
Optical wireless communication (OWC), with intensity modulation (IM), requires the modulated radio frequency (RF) signal to be real and non-negative. To satisfy the requirements, this paper proposes a novel mixed orthogonal frequency division multiplexing (X-OFDM) waveform. Hermitian symmetry (HS) of the sub-carriers in frequency domain, guarantees the
Xu Li +4 more
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Optical wireless communication (OWC), with intensity modulation (IM), requires the modulated radio frequency (RF) signal to be real and non-negative. To satisfy the requirements, this paper proposes a novel mixed orthogonal frequency division multiplexing (X-OFDM) waveform. Hermitian symmetry (HS) of the sub-carriers in frequency domain, guarantees the
Xu Li +4 more
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Orthogonal frequency division multiplexing (OFDM) in photonic communications [PDF]
, 2010 OFDM has emerged as a promising modulation technique in long-haul and access optical networks because of a number of advantages: Scalable spectrum partitioning, good spectral efficiency, dispersion tolerance, and a natural suitability for software-defined transmission.
Freude, W. +20 more
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2011 Conference Record of the Forty Fifth Asilomar Conference on Signals, Systems and Computers (ASILOMAR), 2011
The objective of the presented work is to have a complete system level Orthogonal Frequency Division Multiplexing development platform where students both undergraduate and graduate can use it to explore and identify the different processing blocks available on modern communications systems.
Antonio F. Mondragón-Torres +2 more
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The objective of the presented work is to have a complete system level Orthogonal Frequency Division Multiplexing development platform where students both undergraduate and graduate can use it to explore and identify the different processing blocks available on modern communications systems.
Antonio F. Mondragón-Torres +2 more
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2012 8th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP), 2012
We propose to achieve scalable O-OFDM network planning with a genetic algorithm (GA) that operates in an adaptive way for high optimization efficiency. When the network topology and lightpath requests are given, the GA encodes the routing, spectrum and modulation assignments (RSMA) as genes and optimizes them iteratively.
Wei Lu 0007 +3 more
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We propose to achieve scalable O-OFDM network planning with a genetic algorithm (GA) that operates in an adaptive way for high optimization efficiency. When the network topology and lightpath requests are given, the GA encodes the routing, spectrum and modulation assignments (RSMA) as genes and optimizes them iteratively.
Wei Lu 0007 +3 more
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Orthogonal Frequency Division Multiplex (OFDM)
2004Almost from the beginning of the electrical transmission of messages about 100 years ago, single-carrier methods have been used for transmitting information. The message to be transmitted is impressed on a sinusoidal carrier by applying analog amplitude, frequency or phase modulation techniques.
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