Results 31 to 40 of about 1,760 (173)
Metasurface‐Based Multidimensional Light‐Field Manipulation: From Technologies to Applications
Advanced Science, EarlyView.Multidimensional metasurfaces enable versatile manipulation of multiple optical degrees of freedom, including phase, amplitude, polarization, wavelength, and orbital angular momentum. This review summarizes their fundamental mechanisms, emerging strategies for multidimensional light‐field control, and key applications in optical computing, imaging ...
Heliang Yin +6 more
wiley +1 more source
Tongxin xuebao, 2013 For the robust adaptive beamforming problem of the gen l signal models, a robust beamforming algorithm based on the worst-case performance optimization with positive semi-definite constraints was proposed.
Ding-jie XU, Rui HE, Feng SHEN
doaj +2 more sources
Robust Rank Reduction Algorithm with Iterative Parameter Optimization and Vector Perturbation
Algorithms, 2015 In dynamic propagation environments, beamforming algorithms may suffer from strong interference, steering vector mismatches, a low convergence speed and a high computational complexity.
Peng Li, Jiao Feng, Rodrigo C. de Lamare
doaj +1 more source
Efficient robust adaptive beamforming for cyclostationary signals [PDF]
IEEE Transactions on Signal Processing, 2000 This paper deals with the problem of robust adaptive array beamforming for cyclostationary signals. By exploiting the signal cyclostationarity, the LS-SCORE algorithm presented in a paper by Agee et al. (1990) has been shown to be effective in performing adaptive beamforming without requiring the direction vector of the desired signal.
Lee, Ju-Hong +2 more
openaire +2 more sources
Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective
Advanced Electronic Materials, EarlyView.Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe +4 more
wiley +1 more source
Robust adaptive beamforming with mainlobe maintenance of monopulse beams
The Journal of Engineering, 2019 Adaptive monopulse approaches for angularly localising a main-beam target in jamming are usually based on variations of the concept of optimising the sum (Σ) beam via standard adaptation and then optimising the delta (Δ) beam subject to maintain the ...
Manuel F. Fernández, Kai-Bor Yu
doaj +1 more source
An Improved Hybrid Beamforming Algorithm for Fast Target Tracking in Satellite and V2X Communication
Remote Sensing, 2023 Autonomous remote sensing systems establish communication links between nodes. Ensuring coverage and seamless communication in highly dense environments is not a trivial task as localization, separation, and tracking of targets, as well as interference ...
Aral Ertug Zorkun +2 more
doaj +1 more source
Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems
Advanced Electronic Materials, EarlyView.Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang +9 more
wiley +1 more source
Adaptive beamforming algorithms with robustness against steering vector mismatch of signals
IET Radar, Sonar & Navigation, 2017 Three novel adaptive beamforming algorithms are developed to mitigate the steering vector (SV) random errors of both the desired signal and interferences.
Jiangbo Liu +5 more
doaj +1 more source
Robust Adaptive Beamforming: Experimental Results
, 1998 Publication in the conference proceedings of EUSIPCO, Rhodes, Greece ...
Alex B. Gershman +2 more
openaire +3 more sources