Results 211 to 220 of about 181,659 (263)
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Efficient Spectral Methods for PDEs with Spectral Fractional Laplacian
Journal of Scientific Computing, 2021zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Changtao Sheng, Duo Cao, Jie Shen
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New Electronics, 2020
Data consumption is continually increasing but spectrum is not infinite. Danish Aziz talks to Charlotte Hathway about the RF and microwave technologies Analog Devices has developed to bridge that gap
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Data consumption is continually increasing but spectrum is not infinite. Danish Aziz talks to Charlotte Hathway about the RF and microwave technologies Analog Devices has developed to bridge that gap
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Spectrally Efficient Optical Communications
Asia Communications and Photonics Conference 2015, 2015The paper reviews most diffuse techniques used for increasing spectral efficiency in optical communication, considering different network segments. Time-frequency packing will be described, and compared to Nyquist wavelength-division multiplexing and orthogonal frequency-division multiplexing.
POTI', LUCA +3 more
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Spectrally efficient noncoherent communication
IEEE Transactions on Information Theory, 2002Summary: This paper considers noncoherent communication over a frequency-nonselective channel in which the time-varying channel gain is unknown a priori, but is approximately constant over a coherence interval. Unless the coherence interval is large, coherent communication, which requires explicit channel estimation and tracking prior to detection ...
Warrier, Dilip, Madhow, Upamanyu
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Efficient evolutionary spectral clustering
Pattern Recognition Letters, 2016An evolutionary spectral clustering method using a smoothed Laplacian is presented.The incomplete Cholesky decomposition (ICD) reduces runtime from O(N3) to O(N).The memory requirements are decreased from O(N2) to O(N).A stopping criterion using the convergence of cluster assignments is adopted.An efficient procedure to select the number of clusters is
Rocco Langone +2 more
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2019 Integrated Communications, Navigation and Surveillance Conference (ICNS), 2019
L-Band Digital Aeronautical Communication System (L-DACS) is the new future terrestrial datalink system recognized in the ICAO roadmap to support the future ATM concepts. LDACS is a wide-band data link for Air-Ground communications which will provide services in all flight phases (En-Route, TMA and Airport) and support ATS B2 services as well as future
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L-Band Digital Aeronautical Communication System (L-DACS) is the new future terrestrial datalink system recognized in the ICAO roadmap to support the future ATM concepts. LDACS is a wide-band data link for Air-Ground communications which will provide services in all flight phases (En-Route, TMA and Airport) and support ATS B2 services as well as future
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Efficient Bias Corrected Nonparametric Spectral Estimation
Biometrika, 1991Summary: We consider estimation of a spectral density at a particular frequency. A linear model is developed based on the local second order behaviour of kernel spectral estimates and a second stage estimate is derived from this model. The estimate is shown to be asymptotically more efficient than the kernel estimate with the optimal, but unknown ...
Pawitan, Y., Gangopadhyay, A. K.
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Spectral Efficiency of Cognitive Radio Systems
IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference, 2007In this contribution, we investigate the idea of using cognitive radio to reuse locally unused spectrum to increase the total system capacity. We consider a multiband/wideband system in which the primary and cognitive users wish to communicate to different receivers, subject to mutual interference and assume that each user knows only his channel and ...
Haddad, Majed +2 more
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Efficient regularized spectral data embedding
Advances in Data Analysis and Classification, 2020zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lazhar Labiod, Mohamed Nadif
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Energy-Efficient and Spectrally-Efficient MIMO
2021While enabling energy efficiency and spectral efficiency, MIMO systems tends to be associated to an exponential increase of complexity and of signal processing, with the increase of the number of transmit and receive antennas. As described in this article, a reduction of complexity can be obtained with the use of the two proposed algorithms: Maximum ...
Silva, Mário Marques da +2 more
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