The Experts below are selected from a list of 107271 Experts worldwide ranked by ideXlab platform
Heung-ki Baik - One of the best experts on this subject based on the ideXlab platform.
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A simple STF-OFDM Transmission Scheme for fast fading channels
IEEE 60th Vehicular Technology Conference 2004. VTC2004-Fall. 2004, 1Co-Authors: Sang Soon Park, Han-kyoung Kim, Heung-ki BaikAbstract:In this paper, we propose a STF (space-time-frequency) coded OFDM (orthogonal frequency division multiplexing) Transmission Scheme for fast fading channels. We propose a simple STF-OFDM Transmission Scheme with time diversity gain. This STF-OFDM Transmission Scheme is a simple method for improving performance of conventional SF-OFDM by means of the Hadamard transformation in the time domain. Also our STF-OFDM can be encoded and decoded with low complexity, because the Hadamard transformation can be performed without multiplication.
Sang Soon Park - One of the best experts on this subject based on the ideXlab platform.
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A simple STF-OFDM Transmission Scheme for fast fading channels
IEEE 60th Vehicular Technology Conference 2004. VTC2004-Fall. 2004, 1Co-Authors: Sang Soon Park, Han-kyoung Kim, Heung-ki BaikAbstract:In this paper, we propose a STF (space-time-frequency) coded OFDM (orthogonal frequency division multiplexing) Transmission Scheme for fast fading channels. We propose a simple STF-OFDM Transmission Scheme with time diversity gain. This STF-OFDM Transmission Scheme is a simple method for improving performance of conventional SF-OFDM by means of the Hadamard transformation in the time domain. Also our STF-OFDM can be encoded and decoded with low complexity, because the Hadamard transformation can be performed without multiplication.
Han-kyoung Kim - One of the best experts on this subject based on the ideXlab platform.
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A simple STF-OFDM Transmission Scheme for fast fading channels
IEEE 60th Vehicular Technology Conference 2004. VTC2004-Fall. 2004, 1Co-Authors: Sang Soon Park, Han-kyoung Kim, Heung-ki BaikAbstract:In this paper, we propose a STF (space-time-frequency) coded OFDM (orthogonal frequency division multiplexing) Transmission Scheme for fast fading channels. We propose a simple STF-OFDM Transmission Scheme with time diversity gain. This STF-OFDM Transmission Scheme is a simple method for improving performance of conventional SF-OFDM by means of the Hadamard transformation in the time domain. Also our STF-OFDM can be encoded and decoded with low complexity, because the Hadamard transformation can be performed without multiplication.
Wen Chen - One of the best experts on this subject based on the ideXlab platform.
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an energy efficient data Transmission Scheme for remote state estimation and applications to a water tank system
Isa Transactions, 2017Co-Authors: Yunji Li, Peng Li, Wen ChenAbstract:An energy-efficient data Transmission Scheme for remote state estimation is proposed and experimentally evaluated in this paper. This new Transmission strategy is presented by proving an upper bound of the system performance. Stability of the remote estimator is proved under the condition that some of the observation measurements are lost in a random probability. An experimental platform of two coupled water tanks with a wireless sensor node is established to evaluate and verify the proposed Transmission Scheme.
Shancheng Zhao - One of the best experts on this subject based on the ideXlab platform.
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A Spectral-Efficient Transmission Scheme for Dimmable Visible Light Communication Systems
Journal of Lightwave Technology, 2017Co-Authors: Shancheng ZhaoAbstract:Dimming control is of vital importance for visible light communication (VLC) systems. Conventional dimmable Transmission Schemes based on compensation are spectrally inefficient. In this paper, we propose the use of two techniques, i.e., time-sharing and superposition, to construct spectral-efficient dimmable Transmission Schemes. For VLC systems with on–off keying (OOK) signaling, we present a general framework to construct dimmable Transmission Scheme by time-sharing among different dimming control codes. Arbitrary dimming target is achieved by adjusting the proportion of each dimming control code. We, then, give a practical construction of dimming control codes with semi-constant weight codes. We obtain optimal proportions of the semi-constant weight codes, which maximize the asymptotic spectral efficiency using linear programming. We also compute achievable rates of the proposed Scheme under different dimming targets and different signal-intensity-to-noise-amplitude ratios. To achieve higher spectral efficiency ( $>$ 1.0 (b/s)/Hz), we present a dimmable multilevel Transmission Scheme based on superposition. In the proposed Scheme, the first $\ell$ $-1$ levels adopt traditional OOK modulation, whereas the $\ell$ th level adopts the dimmable Transmission Scheme for OOK modulation. The transmitted signal is formed by superimposing modulated signals of the $\ell$ levels. Analysis shows that the proposed Scheme achieves a higher spectral efficiency than the state-of-the-art Schemes. Hence, it provides an attractive candidate for dimmable VLC systems with demanding spectral efficiency.
