Results 81 to 90 of about 37,267,212 (171)

A Prototype of 20GHz-Low-Complexity Digital Beamforming Transmitter Antenna Module for FR3 Band Using Direct Digital RF Technology in DSoF Configuration

IEEE Access
To miniaturize the digital beamforming (DBF) transmitter module, 1-bit bandpass delta-sigma (BP-DS) direct digital RF transmitter using delta-sigma-over-fiber (DSoF) link by 10GE SFP (Small Form Factor Pluggable) optical module has been studied. However,
Junhao Zhang, Koki Furuuchi, Noriharu Suematsu   +2 more
doaj   +1 more source

Digital beamforming and multidimensional waveform encoding for sapceborne radar remote sensing [PDF]

, 2007
This paper introduces the innovative concept of multidimensional waveform encoding for space-borne synthetic aperture radar (SAR). The combination of this technique with digital beamforming on receive enables a new generation of SAR systems with ...
Moreira, Alberto, Gebert, Nicolas, Krieger, Gerhard   +2 more
core  

Highly Integrated Low-Profile Multilayer Dual-Polarized Phased Array Antenna With Truncated Cavities for First Pulsed Bistatic L-Band Airborne SAR Sensor

IEEE Access
Synthetic Aperture Radar (SAR) has become, nowadays, one of the most important techniques in remote-sensing, and the increasing interest in Earth monitoring reinforces this trend. Next-generation SAR sensors will enhance the radar resolution capabilities
Diego Lorente, Markus Limbach, Bernd Gabler, Hector Esteban, Vicente E. Boria   +4 more
doaj   +1 more source

A Novel Frequency Scanning Variable PRI Imaging Mode for Ultrawide Continuous Swath Spaceborne SAR Imaging

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Digital beamforming (DBF) technique in elevation and variable pulse repetition interval (PRI) technique in azimuth are used to achieve ultrawide continuous swath imaging in synthetic aperture radar (SAR).
Ruizhen Song, Wei Wang, Yongwei Zhang, Yuwei Wu, Weidong Yu   +4 more
doaj   +1 more source

Planar digital-beamforming antenna for satellite navigation

, 1999
A planar digital-beamforming (DBF) antenna for user terminals in future satellite navigation systems has been developed to improve the overall system performance.
Dreher, A., Klefenz, F., Schroth, A,,, Hekmat, T., Lieke, M., Niklasch, N. E.   +5 more
core  

A Novel MIMO SAR Scheme with Intra–Inter-Pulse Phase Coding and Azimuth–Elevation Joint Processing

Remote Sensing
Echo separation has long been a challenging and prominent research focus for Multiple-Input Multiple-Output Synthetic Aperture Radar (MIMO SAR) systems. Digital beamforming (DBF) plays a critical role in achieving effective echo separation, but it often ...
Wulin Peng, Wei Wang, Yongwei Zhang, Yihai Wei, Zixuan Zhang   +4 more
doaj   +1 more source

A Processing Algorithm for Digital Beamforming SAR

, 2005
The idea of a digital radar is not new to the remote sensing community and can be found in open literature. Previous works have shown, that a digital beamforming (DBF) synthetic aperture radar (SAR) opens the possibility for a totally new dimension in ...
Schuler, Karin, Younis, Marwan, Lenz, Rainer, Wiesbeck, Werner, Gebert, Nicolas   +4 more
core  

Single-Snapshot Direction of Arrival Estimation for Vehicle-Mounted Millimeter-Wave Radar via Fast Deterministic Maximum Likelihood Algorithm

World Electric Vehicle Journal
As one of the fundamental vehicular perception technologies, millimeter-wave radar’s accuracy in angle measurement affects the decision-making and control of vehicles.
Hong Liu, Han Xie, Zhen Wang, Xianling Wang, Donghang Chai   +4 more
doaj   +1 more source

Design and development of a low cost digital beamforming demonstrator

, 2010
In this final year project (FYP) report, the author proposes a novel low-cost array digital beamforming (DBF) prototype by using a single microwave digital receiver and chirp signals.
Cui, Dawei.
core  

Study of a single receiver system for digital beamforming applications

, 2011
Digital Beamforming (DBF) technology is an area that is undergoing development due the various advantages and promising features that it may deliver. Conventional DBF technology is however expensive, hence in this final year project (FYP), the author ...
Tan, ZhaoFeng.
core