Results 11 to 20 of about 311,948 (264)
Differential Data-Aided Channel Estimation for Up-Link Massive SIMO-OFDM
IEEE Open Journal of the Communications Society, 2020 Pilot symbol assisted modulation (PSAM) is widely used to obtain the channel state information (CSI) needed for coherent demodulation. It allows the density of pilot symbols to be dynamically chosen depending on the channel conditions.
Manuel J. Lopez-Morales +2 more
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Low-pass filteration using adaptive delta modulation
Journal of Education, Health and Sport, 2017 Linear Delta Modulation (DM) is applicable to processing of signals in digital systems of telecommunication. One of most interesting kind of LDM is Adaptative DM (ADM). This Work presents method of using ADM for low-pass digital filtration.
Arkadiusz Rajs, Mirosław Maszewski
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Long-Block Differential Spatial Modulation
IEEE Access, 2023 Spatial modulation (SM) can transmit additional data bits by selecting antennas and avoids synchronization and interferences among antennas. Differential SM (DSM) is a noncoherent technique of SM, but it is less bandwidth efficient than SM.
Ruey-Yi Wei +2 more
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Symmetries of Modules of Differential Operators [PDF]
Journal of Nonlinear Mathematical Physics, 2005 Let ${\cal F}\_λ(S^1)$ be the space of tensor densities of degree (or weight) $λ$ on the circle $S^1$. The space ${\cal D}^k\_{λ,μ}(S^1)$ of $k$-th order linear differential operators from ${\cal F}\_λ(S^1)$ to ${\cal F}\_μ(S^1)$ is a natural module over $\mathrm{Diff}(S^1)$, the diffeomorphism group of $S^1$.
Gargoubi, Hichem +2 more
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Improved Schemes of Differential Spatial Modulation
IEEE Access, 2021 Differential spatial modulation (DSM) is able to transmit additional data bits without increasing the number of radio-frequency chains and power consumption and also avoids pilot overhead.
Ruey-Yi Wei, Yi-Wei Tsai, Shih-Lun Chen
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IEEE Access, 2021 Tool vibration occurs widely in various machining operations and is one of the main factors affecting machining quality and stability. Light intensity-modulation optical fiber displacement sensor has distinctive advantages and greatly potential in tool ...
Binghui Jia, Jing Yu
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Deformations of Modules of Differential Forms [PDF]
Journal of Nonlinear Mathematical Physics, 2003 Published by JNMP at http://www.sm.luth.se/math ...
Agrebaoui, B. +3 more
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IEEE Access, 2018 In this paper, we investigate the performance of simultaneous wireless information and power transfer cooperative amplify-and-forward communication systems with binary differential phase-shift keying modulation.
Yizhi Feng +3 more
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Analysis in Differential Algebras and Modules [PDF]
Theoretical and Mathematical Physics, 2018 A short introduction to the mathematical methods and technics of differential algebras and modules adapted to the problems of mathematical and theoretical physics is presented.
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A Free-Space Optical Communication System Based on Bipolar Complementary Pulse Width Modulation
Sensors, 2023 In this work, we propose a bipolar complementary pulse width modulation strategy based on the differential signaling system, and the modulation–demodulation methods are introduced in detail.
Jinji Zheng +3 more
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