Results 41 to 50 of about 31,026 (252)

Non Data-Aided SNR Estimation for UAV OFDM Systems

Algorithms, 2020
Signal-to-noise ratio (SNR) estimation is essential in the unmanned aerial vehicle (UAV) orthogonal frequency division multiplexing (OFDM) system for getting accurate channel estimation.
Junfang Li, Mingqian Liu, Ningjie Tang, Bodong Shang   +3 more
doaj   +1 more source

An Improved Non-Data-Aided Frequency Shift Estimation Algorithm [PDF]

Jisuanji gongcheng, 2017
In order to solve the problem of imbalance between the estimation accuracy and estimation range of the intercepted signal with low Signal-to-Noise Ratio(SNR) in electronic environment,such as radio monitoring and electronic warfare and other non ...
AN Qi,HE Zishu,LI Huiyong
doaj   +1 more source

High SNR Linear Estimation of Vector Sources

IEEE Wireless Communications Letters, 2014
In this letter, we extend our prior work and consider decentralized estimation of unknown random vectors under high observation signal-to-noise ratio (SNR). A linear model is considered for decentralized estimation of vector sources. Observation models and sensor operations are both linear.
Alireza Shahan Behbahani, Ahmed M. Eltawil, Hamid Jafarkhani   +2 more
openaire   +4 more sources

Ionic Gating of Liquid‐Crystal‐Like Pteridine Assemblies Enables Tunable Light Scattering

Advanced Materials, EarlyView.
Tunable optical properties emerge through developmentally regulated ionic gating, which transforms disordered, ultraviolet (UV)‐absorbing organelles into concentrically ordered, liquid‐crystal‐like light scatterers. By integrating analyses of pteridine composition, potassium‐dependent assembly, hierarchical ultrastructure, and optical behavior, the ...
Sourabh Bera, Zohar Eyal, Yael Noy, Yuval Barzilay, Siddharth Sahoo, Srikant Moharana, Avi Baram, Tali Lerer‐Goldshtein, Neta Varsano, Bar Bader, Lothar Houben, Uwe Heinig, Iddo Pinkas, Moshe Goldsmith, Tamar Unger, Shira Albeck, Andrea Sorrentino, Maxim Itkin, Sergey Malitsky, Ziv Porat, Ido Hadar, Venkata Jayasurya Yallapragada, Dvir Gur   +22 more
wiley   +1 more source

Advances in Halide Perovskites for Photon Radiation Detectors

Advanced Materials Technologies, EarlyView.
This work highlights recent progress in perovskite‐based photon radiation detectors, covering organic–inorganic hybrid, inorganic, lead‐free double, and vacancy‐ordered halide perovskites. Their detection performance is compared, material‐specific advantages and challenges are examined, and provides insight into current limitations and future ...
Liangling Wang, Jieqi Wang, Xiaojun Cui, Carsten Ronning   +3 more
wiley   +1 more source

Enhanced Signal-to-Noise Ratio Estimation in Optical Fiber Communications: A Pilot-Based Approach

IEEE Open Journal of the Communications Society
This paper presents two innovative, pilot-assisted, neural network (NN)-based signal-to-noise ratio (SNR) estimators for application in optical fiber communications.
Mohamed Al-Nahhal, Ibrahim Al-Nahhal, Sunish Kumar Orappanpara Soman, Octavia A. Dobre   +3 more
doaj   +1 more source

Hierarchical Multi‐Material Architectures With Gradient Design for Dynamic‐Range Flexible Tactile Sensing

Advanced Materials Technologies, EarlyView.
Hierarchical multi‐material TPMS lattices are engineered as flexible tactile sensors by combining soft and stiff elastomeric layers with a conformal conductive coating. The bilayer architecture delivers sensitivity at low pressures while maintaining a broad detectable range under large loads, enabling reliable pressure and vibration monitoring for ...
Reza Noroozi, Domenic Quiquero, Yan Yan Shery Huang, HaoTian Harvey Shi   +3 more
wiley   +1 more source

Recent Advances in Transparent Microelectrode Device Architecture and Fabrication Strategies for Biomedical Applications

Advanced Materials Technologies, EarlyView.
Transparent microelectrode arrays enable simultaneous optical and electrical electrophysiology with high spatiotemporal resolution, allowing multimodal observations of dynamic biological systems. Advances in materials and device architectures improve device performance by addressing key trade‐offs between optical transparency, impedance, and ...
Michael Abraham Listyawan, Tran Bach Dang, Chi Cong Nguyen, Yee Lap Pong, Tianruo Guo, Thanh Nho Do, Hoang‐Phuong Phan   +6 more
wiley   +1 more source

The Added Value of Cascaded Plane Wave Imaging for Autocorrelation- and Cross-Correlation-Based Velocity Vector Imaging

IEEE Open Journal of Ultrasonics, Ferroelectrics, and Frequency Control
Velocity vector imaging (VVI) can suffer from poor signal-to-noise (SNR) conditions, eventually restricting the estimation of velocities at low SNRs. Cascaded dual-polarity wave (CDW) imaging has been shown to enhance blood-SNR, thereby improving cross ...
Joosje M. K. De Bakker, Ingvild K. Ekroll, Anne E. C. M. Saris, Jorgen Avdal   +3 more
doaj   +1 more source

High-Accuracy and Low-Complexity DOA Estimation Algorithm for Transmit-Only Diversity Bistatic MIMO Radar

IEEE Access, 2019
This paper proposes TOD-MUSIC algorithm to improve the Direction of Arrival (DOA) estimation accuracy under low Signal-to-Noise Ratio (SNR) in transmit-only diversity bistatic Multiple-Input Multiple-Output (MIMO) radar.
Xiaoping Zeng, Guanghui Chen, Shuang Jiao, Shu Fu, Li Dong   +4 more
doaj   +1 more source