Results 51 to 60 of about 58,184 (306)
Semi-blind adaptive beamforming for high-throughput quadrature amplitude modulation systems [PDF]
, 2010 A semi-blind adaptive beamforming scheme is proposed for wireless systems that employ high-throughput quadrature amplitude modulation signalling. A minimum number of training symbols, equal to the number of receiver antenna arrays elements, are first ...
Sheng Chen +5 more
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Advanced Science, EarlyView.A self‐powered phase‐encoding sensing paradigm enables direct motion‐to‐time information conversion, providing a compact and autonomous strategy for high resolution angular displacement measurement. ABSTRACT In modern manufacturing and engineering, angular displacement sensors are crucial for motion control and feedback systems in Electromechanical ...
Shuxian Wang +3 more
wiley +1 more source
A Quadrature PLL With Phase Mismatch Calibration for 32GS/s Time-Interleaved ADC
IEEE Access, 2020 This article presents an accurate quadrature phase-locked loop (PLL) with quadrature phase mismatch calibration for 32 GS/s analog-to-digital converter (ADC). Due to the mismatches of clock distribution in layout and variations of the active devices, the
Shunli Ma, Tianxiang Wu, Junyan Ren
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Advanced Science, EarlyView.The concept of high‐dimensional EM modulation using the STMA for physical layer secure communication is illustrated in figure. The STMA consists of a series of programmable unit cells, with 1‐bit reconfigurable phase states (0/π). The STMA is excited by a monochromatic continuous wave (CW) at frequency fc and controlled by a field‐programmable gate ...
Xinyu Fang +6 more
wiley +1 more source
Quadrature error cancellation for micro-machined vibratory gyroscope embedded in high order electromechanical Sigma Delta modulator [PDF]
, 2013 Vibratory micro-machined gyroscopes utilize Coriolis force to detect the rotation rate. Recently it has been proved that embedding the gyroscope in an electromechanical ΣΔ modulator (EMSDM), results in increased linearity, rate detection range, and ...
Salimi, Pejwaak
core
Effect of Quadrature Control Mode on ZRO Drift of MEMS Gyroscope and Online Compensation Method
Micromachines, 2022 The quadrature coupling error is an important factor that affects the detection output of microelectromechanical system (MEMS) gyroscopes. In this study, two quadrature error control methods, quadrature force-to-rebalance control (Mode I) and quadrature ...
Feng Bu, Shuwen Guo, Bo Fan, Yiwang Wang
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Scan‐Path‐ and Initial‐State‐Dependent Superdomain Switching in (111)‐Oriented PZT
Advanced Electronic Materials, EarlyView.Scan trajectory and initial superdomain topology govern polarization switching in (111)‐oriented PZT. Automated AFM writing, pulsing experiments, and interferometric 3D‐PFM show that raster scans reproducibly stabilize ordered Type‐I stripe superdomains with constrained variant selection, whereas spiral trajectories generate frustrated mixed‐variant ...
Rama Vasudevan +11 more
wiley +1 more source
Optimisations for quadrature representations of finite element tensors through automated code generation [PDF]
, 2009 We examine aspects of the computation of finite element matrices and vectors that are made possible by automated code generation. Given a variational form in a syntax that resembles standard mathematical notation, the low-level computer code for building
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AIChE Journal, EarlyView.ABSTRACT Hybrid modeling combines first‐principles equations with a data‐driven subcomponent. Training for the data‐driven part is sensitive to measurement noise when training targets are constructed using pointwise time derivatives. Beyond differentiation errors, hybrid models involve solving an inverse problem to estimate the data‐driven term, which ...
Hangjun Cho +4 more
wiley +1 more source
Discontinuous finite-element quadrature sets based on icosahedron for the discrete ordinates method
Nuclear Engineering and Technology, 2020 The discrete ordinates method (SN) is one of the major shielding calculation method, which is suitable for solving deep-penetration transport problems.
Ni Dai, Bin Zhang, Yixue Chen
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