Results 31 to 40 of about 37,267,212 (171)
Fast DBF for conformal arrays based on 2D Fourier decomposition
The Journal of Engineering, 2019 Digital array radars with conformal arrays are attractive for platforms with limited installation space such as aircraft and unmanned aerial vehicles.
Yuan Yao, Guangxin Wu
doaj +1 more source
Study on Adaptive Digital Beamforming for Spaceborne SAR Based on Capon Spatial Spectrum Estimation
Leida xuebao, 2014 In rough mountainous areas, beam-pointing mismatch problems always arise when a spaceborne Synthetic Aperture Radar (SAR) uses the traditional Digital BeamForming (DBF) approach in elevation to receive echoes, leading to the degradation of the receiver’s
Feng Fan, Dang Hong-xing, Tan Xiao-min
doaj +1 more source
Remote Sensing, 2019 Radio Frequency Interference (RFI) is a growing problem in Synthetic Aperture Radar (SAR) systems as scientific motivations push the radars to lower frequencies and as more wireless services share the frequency spectrum.
Tobias Bollian +4 more
doaj +1 more source
International Journal of Antennas and Propagation, 2015 For future spaceborne synthetic aperture radar (SAR) missions, digital beamforming (DBF) on receive in elevation to form a sharp high receive beam will be adopted to improve the signal to noise ratio (SNR) level and suppress range ambiguities.
Pingping Huang, Wei Xu
doaj +1 more source
Machine-Learning-Based Framework for Coding Digital Receiving Array with Few RF Channels
Remote Sensing, 2022 A novel framework for a low-cost coding digital receiving array based on machine learning (ML-CDRA) is proposed in this paper. The received full-array signals are encoded into a few radio frequency (RF) channels, and decoded by an artificial neural ...
Lei Xiao, Yubing Han, Zuxin Weng
doaj +1 more source
Remote Sensing, 2020 With the rapid development of the multiple-input multiple-output synthetic aperture radar (MIMO SAR) system, the demands for miniaturization and high gain of antenna are increasing.
Shenjing Wang +5 more
doaj +1 more source
A New Method of Ka DBF ATI-SAR for Full Ocean Current Vectors Inversion
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022 For applications such as high-precision current velocity field monitoring, Ka-band SAR has an important advantage in baseline configuration, which can be configured with dual antennas or more effective phase centers for a single satellite, forming ...
Hui Wang +4 more
doaj +1 more source
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.This work proposes a micro‐Doppler‐assisted particle‐filtering track‐before‐detect (mD‐PF‐TBD) algorithm with a variable‐particle mechanism to robustly track UAVs in passive radar systems, particularly when they enter the Doppler‐blind zone (DBZ). As the target Doppler frequency approaches zero, the algorithm adaptively reallocates particles towards ...
Chenyu Wen +8 more
wiley +1 more source
Digital Beamforming and MIMO SAR: Review and New Concepts [PDF]
, 2012 Spaceborne Synthetic Aperture Radar (SAR) is a unique tool for large scale Earth observation, but the current generation of SAR sensors suffers from some fundamental limitations with regard to their imaging and mapping capabilities.
Villano, Michelangelo +10 more
core
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.This paper investigates the phase‐frequency response characteristics of frequency diverse array (FDA) radar on airborne warning and control system (AWACS) platforms and its deception mechanism against interferometric direction finders, aiming to address the vulnerability of AWACS to precise interception by passive direction‐finding systems due to poor ...
Jing Zhang, Bo Wang, Haowei Zhang
wiley +1 more source