Results 31 to 40 of about 35,288,445 (167)
Digital Beamforming for HRWS-SAR Imaging - System Design, Performance and Optimization Strategies [PDF]
, 2006 Multi-aperture synthetic aperture radar (SAR) systems in combination with an appropriate coherent processing of the individual aperture signals enable high resolution wide swath (HRWS) SAR imaging.
Moreira, Alberto +5 more
core +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
On the effect of SNR and superdirective beamforming in speaker diarisation in meetings [PDF]
, 2012 This paper examines the effect of sensor performance on speaker diarisation in meetings and investigates the use of more advanced beamforming techniques, beyond the typically employed delay-sum beamformer, for mitigating the effects of poorer sensor ...
Mike Lincoln +5 more
core +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
Using of Deep Learning in Beamforming Antenna Array
Wasit Journal of Engineering SciencesDigital beamforming (DBF) is a crucial technology for large antenna arrays, offering precise control over beam steering. This research introduces a novel method to enhance millimeter wave transmission by incorporating DBF with long-term memory (LSTM ...
Ali Naji +2 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
An Advanced Real-Time Internal Calibration Scheme for the DBF-SCORE Spaceborne SAR Systems
Remote SensingBased on Digital Beamforming (DBF) technology, spaceborne SAR systems can achieve high-resolution and wide-swath (HRWS) imaging. When combined with reflector antennas, the DBF-SCORE (Digital Beamforming-SCan On REceive) system also features light weight ...
Yuanbo Jiao +5 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