Results 61 to 70 of about 35,288,445 (167)

A short wave radar beam sharpening method based on generalised oblique projection operator with flexible parameter

IET Radar, Sonar &Navigation, Volume 18, Issue 7, Page 1132-1144, July 2024.
A new narrow beam method based on the generalised oblique projection is proposed. The method proposed has the characteristics of a narrow beam width and big side lobe suppression ratio and is applicable to practical applications with a limited array aperture.
Xingpeng Mao, Ju Li, Heyue Huang, Yiming Wang, Junjie Lang   +4 more
wiley   +1 more source

Improving estimation performance of compressive sensing‐based multiple‐input multiple‐output radar using electronic beamsteering

IET Radar, Sonar &Navigation, Volume 18, Issue 6, Page 891-903, June 2024.
The authors deal with direction‐of‐arrival (DoA) estimation of obstacles in the field‐of‐view (FoV) using compressive sensing (CS) and compares multiple‐input multiple‐output (MIMO) radar signal processing with a codebook‐based electronic beamsteering approach for compact radar sensors in future urban air mobility.
Max Schurwanz, Jan Mietzner, Peter Adam Hoeher   +2 more
wiley   +1 more source

A Novel Real-Time Multi-Channel Error Calibration Architecture for DBF-SAR

Remote Sensing
Digital Beamforming SAR (DBF-SAR) provides high-resolution wide-swath imaging capability, yet it is affected by inter-channel amplitude, phase and time-delay errors induced by temperature variations and random error factors.
Jinsong Qiu, Zhimin Zhang, Yunkai Deng, Heng Zhang, Wei Wang, Zhen Chen, Sixi Hou, Yihang Feng, Nan Wang   +8 more
doaj   +1 more source

Urban traffic congestion alleviation system based on millimeter wave radar and improved probabilistic neural network

IET Radar, Sonar &Navigation, Volume 18, Issue 2, Page 327-343, February 2024.
The authors propose an urban traffic congestion alleviation system based on millimeter wave radar and improved probabilistic neural network. And actual traffic light control case is provided to verify the performance of the proposed radar system. Abstract The millimeter‐wave radar sensor is widely used for urban traffic surveillance because of its ...
Bo Yang, Hua Zhang, Mengxin Du, Anna Wang, Kai Xiong   +4 more
wiley   +1 more source

Analysis and Design of a Multiplex, Delay‐and‐Sum (MDAS) Beamformer Architecture to Implement a Fixed‐Focus Receive Beamformer for Portable Ultrasound Imaging Systems

Journal of Electrical and Computer Engineering, Volume 2024, Issue 1, 2024.
A multiplex, delay‐and‐sum (MDAS) architecture is proposed to implement a fixed‐focus receive beamformer such as the first stage of the synthetic aperture sequential beamforming (P‐SASB) and synthetic transmit beams combined with the P‐SASB (STB‐P‐SASB) beamforming methods.
Sadegh Dashti, Omid Shoaei, Andrea Tani
wiley   +1 more source

A Low‐Cost Wideband Digital Array Antenna Based on Stretch Processing Technique

International Journal of Antennas and Propagation, Volume 2024, Issue 1, 2024.
Wideband digital phased array radar offers the advantages of high range resolution, which improves the recognition ability for multiple targets, group targets, and high‐speed targets. Traditional wideband phased arrays use true time delay to compensate for aperture fill time; however, the cost increases significantly.
Daqun Yu, Zhangcheng Hao, Lei Yang, Yang Wang, Lei Sun, Jianjun Mao, Trushit Upadhyaya   +6 more
wiley   +1 more source

A Spaceborne Ka‐Band Earth‐Coverage Phased Array Antenna Based on DBF‐Shared Subarray for LEO Communications

International Journal of RF and Microwave Computer-Aided Engineering, Volume 2024, Issue 1, 2024.
A spaceborne Earth‐coverage phased array (ECPA) antenna at Ka‐band is proposed for low‐Earth orbit (LEO) satellite applications, which is based on digital beamforming (DBF) partially shared subarray architecture to implement two stages of DBF. By taking into account the effects of mutual coupling in active element pattern optimization, a new method to ...
Muren Cai, Wentao Li, Xiaowei Shi, Qiaoshan Zhang, Heng Liu, Hu Liu, Yan Li, Buning Tian, Piotr Gas   +8 more
wiley   +1 more source

Digital Beamforming: A Paradigm Shift for Spaceborne SAR [PDF]

, 2013
Spaceborne Synthetic Aperture Radar (SAR) provides high-resolution, day-and-night and weather-independent images for a multitude of applications ranging from geoscience and climate change research, environmental monitoring, global 2-D and 3-D mapping ...
Moreira, Alberto
core  

Digital beamforming to mitigate automotive radar interference

, 2016
Interference between automotive radars decreases the sensors’ detection capabilities. It is possible to use digital beamforming (DBF) in multi-antenna systems to reduce the power received from certain directions of arrival (DoA).
Eid, Karim, Bechter, Jonathan, Waldschmidt, Christian, Roos, Fabian   +3 more
core   +1 more source

A Novel Multi-Beam SAR Two-Dimensional Ambiguity Suppression Method Based on Azimuth Phase Coding

Remote Sensing
In order to address the problems of range ambiguity and azimuth ambiguity in the wide-swath imaging of synthetic aperture radar (SAR), this paper proposes a multi-beam SAR two-dimensional ambiguity suppression method based on azimuth phase coding (APC ...
Yihao Xu, Fubo Zhang, Wenjie Li, Yangliang Wan, Longyong Chen, Tao Jiang   +5 more
doaj   +1 more source