Results 51 to 60 of about 451,138 (246)

A Synthetic Aperture Radar Imaging Simulation Method for Sea Surface Scenes Combined with Electromagnetic Scattering Characteristics

Remote Sensing
Synthetic aperture radar (SAR) simulation is a vital tool for planning SAR missions, interpreting SAR images, and extracting valuable information. SAR imaging is essential for analyzing sea scenes, and the accuracy of sea surface and scattering models is
Yao He, Le Xu, Jincong Huo, Huaji Zhou, Xiaowei Shi   +4 more
doaj   +1 more source

Empirical Comparison of Chirp and Multitones on Experimental UWB Software Defined Radar Prototype [PDF]

, 2012
This paper proposes and tests an approach for an unbiased study of radar waveforms' performances. Using the ultrawide band software defined radar prototype, the performances of Chirp and Multitones are compared in range profile and detection range.
Denoulet, J., Garda, P., Le Kernec, J., Romain, O.   +3 more
core  

Stairs Detection for Enhancing Wheelchair Capabilities Based on Radar Sensors

, 2017
Powered wheelchair users encounter barriers to their mobility everyday. Entering a building with non barrier-free areas can massively impact the user mobility related activities.
Abdulatif, Sherif, Aziz, Fady, Cooper, Rory, Kleiner, Bernhard, Riehs, Christopher, Schneider, Urs   +5 more
core   +1 more source

Adaptive radar detection

Electronics Letters, 1985
In the letter a new adaptive procedure for the detection of a radar target in clutter is described. The procedure is based on the development of linear models for the two hypotheses H0 and H1. Under hypothesis H0, there is no target present, and the received signal is modelled as a regressive process.
Qi-Tu Zwang, Simon Haykin
openaire   +2 more sources

A Miniaturized High-Gain Multi-Beam Lens Antenna Based on Quasi-Conformal Transformation Optics

IEEE Access
This paper presents the design of a novel multi-beam Luneburg lens antenna with specific dielectric structure and proposes a new solution for downsizing planar lens antennas.
Miao Lv, Li Zhang, Mengyi Li, Fanchao Zeng, Shaoli Zuo, Zhi-Ya Zhang, Yu Wang, Tong Wu   +7 more
doaj   +1 more source

Kernel Point Convolution LSTM Networks for Radar Point Cloud Segmentation

Applied Sciences, 2021
State-of-the-art 3D object detection for autonomous driving is achieved by processing lidar sensor data with deep-learning methods. However, the detection quality of the state of the art is still far from enabling safe driving in all conditions ...
Felix Nobis, Felix Fent, Johannes Betz, Markus Lienkamp   +3 more
doaj   +1 more source

A Dual-Port Dual-Wideband Dual-Sense Circularly Polarized DRA With a Novel Feeding Mechanism

IEEE Open Journal of Antennas and Propagation
A dual-wideband dual-sense circularly polarized (CP) dielectric resonator antenna (DRA) based on a novel feeding technique is investigated and demonstrated.
Li Zhang, Jian-Wei Liu, Bo Chen, Liang-Yong Yi, Dian Liu, Zi-Bin Weng, Yong-Chang Jiao   +6 more
doaj   +1 more source

A DFB-SOA Based Optical Vector Network Analyzer for Characterization of Bandpass Optical Devices

Applied Sciences
In this paper a novel optical vector network analyzer (OVNA) utilizing a distributed feedback semiconductor optical amplifier (DFB-SOA) is introduced. The proposed OVNA is implemented by converting the transmission response of the optical device under ...
Ye Deng, Hui Gao, Zhixiong Shen, Bin Li, Jinping Zhang   +4 more
doaj   +1 more source

Bird radar validation in the field by time-referencing line-transect surveys. [PDF]

PLoS ONE, 2013
Track-while-scan bird radars are widely used in ornithological studies, but often the precise detection capabilities of these systems are unknown. Quantification of radar performance is essential to avoid observational biases, which requires practical ...
Adriaan M Dokter, Martin J Baptist, Bruno J Ens, Karen L Krijgsveld, E Emiel van Loon   +4 more
doaj   +1 more source

A 2-D Fully Polarized Van Atta Array Based on Wide-Beam Tri-Polarized Antennas

Micromachines
This paper proposes a 2-D fully polarized Van Atta array, which consists of four tri-polarized antenna elements. The tri-polarized antenna element comprises a monopole antenna and a low-profile microstrip antenna that widens the beam by folding four ...
Jicheng Pan, Lei Chen, Shuangdi Zhao, Tianling Zhang   +3 more
doaj   +1 more source