Results 1 to 10 of about 519,811 (291)
Efficient Beampattern Synthesis for Sparse Frequency Diverse Array via Matrix Pencil Method [PDF]
Sensors, 2022 Due to the introduction of frequency offsets, the pattern synthesis problem of sparse Frequency diverse array (FDA) becomes more complicated than that of the phased array. A typical way to solve this problem is to use a global optimization algorithm, but
Xiaolang Shao +5 more
doaj +2 more sources
Prospects of FMCW-based frequency diverse array radar [PDF]
The Journal of Engineering, 2019 The linear frequency modulated (LFM) frequency modulated continuous wave (FMCW)-based frequency diverse array (FDA) radar concept is investigated in detail. The radar operates as a linear pulsed FMCW/FDA in the transmission (TX) mode while it operates as
Ramazan Çetiner +3 more
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Unambiguous Forward-Looking SAR Imaging on HSV-R Using Frequency Diverse Array [PDF]
Sensors, 2020 It is a challenge to realize wide swath imaging due to the conflict between Doppler ambiguity and range ambiguity for hypersonic vehicle (HSV) radar. In addition, there are many conditions requiring the forward-looking imaging.
Mengdi Zhang +3 more
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Two-Dimensional Barrage Jamming against SAR Using a Frequency Diverse Array Jammer [PDF]
Sensors, 2023 Due to the modulation of tiny frequency offset on the array elements, a frequency diverse array (FDA) jammer can generate multiple range-dimension point false targets, and many deception jamming methods against SAR using an FDA jammer have been studied ...
Jingke Zhang +5 more
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Research on Piezoelectric Guided Wave Frequency Diverse Array-Based Damage Location Method for Thin-Walled Structures [PDF]
MicromachinesPhased array technology can be realized with directional control with fixed beam steering. However, its directionally dependent beam pattern limits the efficiency of suppressing undesirable distance interference.
Changlin Wang +2 more
doaj +2 more sources
Frequency Diverse Array OFDM Transmitter for Secure Wireless Communication [PDF]
Electronics Letters, 2015 In this reported work, the frequency diverse array concept is employed to construct an orthogonal frequency‐division multiplexing (OFDM) transmitter that has the capability of securing wireless communication in free space directly in the physical‐layer without the need for mathematical encryption.
Ding, Y., Fusco, V., Zhang, J.
core +5 more sources
Tangent hyperbolic circular frequency diverse array radars
The Journal of Engineering, 2016 Frequency diverse array (FDA) with uniform frequency offset (UFO) has been in spot light of research for past few years. Not much attention has been devoted to non-UFOs in FDA. This study investigates tangent hyperbolic (TH) function for frequency offset
Sarah Saeed +3 more
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Parametric localisation in frequency diverse array [PDF]
IET Radar, Sonar & Navigation, 2020 The authors present a non‐traditional, parametric method for velocity, angle, and range estimation in a frequency diverse array radar. Unlike the traditional beamforming techniques, the proposed scheme transmits an omni‐directional sinusoid regardless of the target locations.
Mahata, Kaushik, Hyder, Md Mashud
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Index Modulation for Frequency Diverse Array [PDF]
IEEE Antennas and Wireless Propagation Letters, 2020 The index modulation (IM) approach adds an extra signal modulation dimension by utilizing a subcarrier index domain, which is in addition to the traditional IQ domain. A frequency diverse array (FDA) technology is rapidly developing as a new technique for radar systems.
Gaojian Huang +3 more
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IET Radar, Sonar & Navigation, 2022 Frequency diversity array (FDA) radar provides more degrees of freedom and can generate range‐angle‐time‐dependent beampattern. Furthermore, based on the receiver's multi‐input multi‐output (MIMO) scheme, the frequency diversity array‐multi‐input multi ...
Changlin Zhou +5 more
doaj +1 more source