Results 31 to 40 of about 521,871 (286)
Frequency Diverse Array Target Localization Based on IPSO-BP
International Journal of Antennas and Propagation, 2020 For the traditional target localization algorithms of frequency diverse array (FDA), there are some problems such as angle and distance coupling in single-frequency receiving FDA mode, large amount of calculation, and weak adaptability.
Qinghua Liu +3 more
doaj +1 more source
A window into the complexity of the dynamic rupture of the 2011 Mw 9 Tohoku-Oki earthquake [PDF]
, 2011 The 2011 Mw 9 Tohoku-Oki earthquake, recorded by over 1000 near-field stations and multiple large-aperture arrays, is by far the best recorded earthquake in the history of seismology and provides unique opportunities to address fundamental issues in ...
Ampuero, Jean-Paul +2 more
core +1 more source
An Overview of Frequency Diverse Array Radar Technology
Leida xuebao, 2018 The carrier frequencies of array elements in a Frequency Diverse Array (FDA) radar are slightly distinguished, leading to a range-angle-time-dependent transmit beampattern. Thus, an FDA radar carries additional information in a certain range and provides
Xu Jingwei +3 more
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Space scanning FMCW-based two-dimensional frequency diverse array radar
The Journal of Engineering, 2019 The frequency-modulated continuous wave (FMCW)-based frequency diverse array (FDA) radar concept is extended to two dimensions (2D). The radar operates as a linear pulsed FMCW/FDA in the transmission (TX) mode while it operates as a pulsed FMCW/phased ...
Savaş Karadağ +2 more
doaj +1 more source
Angle-range-polarization-dependent beamforming for polarization sensitive frequency diverse array
EURASIP Journal on Advances in Signal Processing, 2019 In this paper, we present a polarization sensitive frequency diverse array (PSFDA), which benefits both from frequency diverse array (FDA) and polarization sensitive array (PSA), producing angle-range-polarization-dependent beamforming capability.
Hui Chen, HuaiZong Shao, HongYang Chen
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Analysis of beampattern dwell time for planar frequency diverse array
IET Signal Processing, 2021 Frequency diverse array (FDA) has received much attention due to its both range–angle‐dependent beampattern. However, most of the existing works focus on the linear FDA, and time‐varying characteristics of its beampattern only give a rough qualitative ...
Hui Chen, Zi‐Hao Li, Wen‐Qin Wang
doaj +1 more source
Remote Assessment of Cultural Heritage Environments with Wireless Sensor Array Networks [PDF]
, 2014 The logistics and cost of environmental monitoring can represent challenges for heritage managers, partly because of the sheer number of environmental parameters to consider.
Agbota +15 more
core +2 more sources
Antenna Element Index Modulation for Frequency Diverse Array
International Journal of Antennas and Propagation, 2019 In this paper, we propose a new architecture and provide performance analysis for frequency diverse array (FDA) Radar combined with the index modulation (IM) techniques. Here, the IM concept is applied upon frequency offsets in an FDA.
Gaojian Huang +3 more
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Ultra-Wideband Imaging via Frequency Diverse Array with Low Sampling Rate
Remote Sensing, 2022 Imaging systems based on millimeter waves (mm-waves) are advancing to achieve higher resolution and wider bandwidth. However, a large bandwidth requires high sample rates, which may limit the development of ultra-wideband imaging systems. In this letter,
Zhonghan Wang, Yaoliang Song, Yitong Li
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Frequency Diverse Array Auto-Scanning Beam Characteristics and Potential Radar Applications
IEEE Access, 2022 Different from the phased-array with the same carrier frequency for all elements providing only angle-dependent beampattern, frequency diverse array (FDA) using a small frequency offset across its array elements offers new application capabilities due to
Wen-Qin Wang
doaj +1 more source