Results 61 to 70 of about 927 (180)
Spectrum Sharing in Cognitive Radio Using GSC with Suppressed Sidelobes
International Journal of Distributed Sensor Networks, 2014 Cognitive radio system is an innovative technology in the wireless communication that has the capability to smartly communicate with each other by opportunistically exploiting the vacant spectrum of primary users.
Syed Azmat Hussain +3 more
doaj +1 more source
Sidelobe suppression in correlated multipath estimates [PDF]
The Journal of the Acoustical Society of America, 1987 Some environments cause a propagating signal to split along several different paths. When such multipath propagation occurs, the covariance among signals traveling along rays emanating from a common source is expected to be larger than the covariance between signals generated by independent sources.
openaire +1 more source
Photon Avalanching Nanoparticles: The Next Generation of Upconverting Nanomaterials?
Advanced Functional Materials, Volume 36, Issue 41, 21 May 2026.This Perspective outlines the mechanistic foundations that enable photon‐avalanche (PA) behavior in lanthanide nanomaterials and contrasts them with emerging application spaces and forward‐looking design strategies. By bridging threshold engineering, energy‐transfer dynamics, and materials engineering, we provide a coherent roadmap for advancing the ...
Kimoon Lee +7 more
wiley +1 more source
Leida xuebaoSpace-Time Adaptive Processing (STAP) is a key technique used for ground/sea clutter suppression and moving target detection in airborne radar. However, under range ambiguity conditions, the inherent clutter nonstationarity in airborne bistatic radar ...
Hangui ZHU +5 more
doaj +1 more source
Multi-Phase-Center Sidelobe Suppression Method for Circular GBSAR Based on Sparse Spectrum
IEEE Access, 2020 Circular ground-based synthetic aperture radar (GBSAR) is a new type of GBSAR with three-dimensional (3D) imaging capability. Its relatively low bandwidth-to-frequency ratio and donut shaped spectrum cause high sidelobes problem, which seriously affects ...
Yanping Wang +4 more
doaj +1 more source
Advanced Photonics Research, Volume 7, Issue 5, May 2026.An inverse‐designed bilayer diffractive structure enables reconfigurable propagation of two distinct curved beams via 180° rotation of the second layer. Curved electromagnetic beams at terahertz (THz) frequencies have recently emerged as a powerful example of wavefront engineering, with applications in imaging and high‐capacity wireless communications.
Wei Jia +3 more
wiley +1 more source
IEEE Access, 2019 As an efficient sidelobe suppression technique for orthogonal frequency-division multiplexing (OFDM) systems, the orthogonal projection is capable of achieving deep suppression while maintaining low complexity.
Guangfa Dai, Shaoping Chen, Gaofeng Wang
doaj +1 more source
Thinning and Weighting of Planar/Conformal Arrays Considering Mutual Coupling Effects
International Journal of Antennas and Propagation, 2016 Based on an improved active element pattern (AEP) technique, a novel effective method for sidelobe suppression considering mutual coupling (MC) in planar and conformal sparse arrays is proposed in this paper.
You-Feng Cheng +4 more
doaj +1 more source
Tapered high-gain Fabry-Perot cavity antenna with high sidelobe suppression for 5G industry. [PDF]
Sci Rep, 2023 Hussain M, Lee KG, Kim D.
europepmc +1 more source
Design and Performance Analysis of Capacitive Micromachined Ultrasonic Transducer Linear Array
Micromachines, 2014 An ultrasonic transducer is a key component to achieve ultrasonic imaging. This paper designs a new type of Microelectromechanical Systems (MEMS) based capacitive ultrasonic transducer and a linear array based on the transducer.
Hongliang Wang +3 more
doaj +1 more source