Efficient Parameter Estimation for Sparse SAR Imaging Based on Complex Image and Azimuth-Range Decouple [PDF]
Sensors, 2019 Sparse signal processing theory has been applied to synthetic aperture radar (SAR) imaging. In compressive sensing (CS), the sparsity is usually considered as a known parameter. However, it is unknown practically.
Mingqian Liu +3 more
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Reduced Degrees of Freedom in Space-Time Adaptive Processing for Space-based Early Warning Radar
Leida xuebao, 2022 The clutter of space-based early warning radar exhibits tight coupling in the azimuth-elevation-Doppler domain due to the high speed of satellites and the Earth’s rotation.
Keqing DUAN +4 more
doaj +1 more source
Azimuth-range decouple-based L 1 regularization method for wide ScanSAR imaging via extended chirp scaling [PDF]
Journal of Applied Remote Sensing, 2017 In this paper, we proposed an azimuth-range decouple-based L1 regularization method for wide ScanSAR imaging via extended chirp scaling (ECS) and applied it to the TerraSAR-X data to achieve large-scale sparse reconstruction. Compared with ECS, the conventional ScanSAR imaging algorithm based on matched filtering, the proposed method can improve the ...
Bi, Hui +3 more
openaire +2 more sources
Extended Chirp Scaling-Baseband Azimuth Scaling-Based Azimuth–Range Decouple $L_{1}$ Regularization for TOPS SAR Imaging via CAMP [PDF]
IEEE Transactions on Geoscience and Remote Sensing, 2017 This paper proposes a novel azimuth–range decouple-based $L_{1}$ regularization imaging approach for the focusing in terrain observation by progressive scans (TOPS) synthetic aperture radar (SAR). Since conventional $L_{1}$ regularization technique requires transferring the (2-D) echo data into a vector and reconstructing the scene via 2-D ...
Hui Bi +4 more
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Comparison of Raw Data-Based and Complex Image-Based Sparse SAR Imaging Methods
Sensors, 2019 Sparse signal processing has already been introduced to synthetic aperture radar (SAR), which shows potential in improving imaging performance based on raw data or a complex image.
Zhilin Xu +4 more
doaj +1 more source
Implications of mean field accretion disc theory for vorticity and magnetic field growth [PDF]
, 2000 In addition to the scalar Shakura-Sunyaev $\alpha_{ss}$ turbulent viscosity transport term used in simple analytic accretion disc modeling, a pseudoscalar transport term also arises.
Balbus, E. G. Blackman, Ingersoll
core +4 more sources
Reducing “Structure from Motion”: a general framework for dynamic vision. 2. Implementation and experimental assessment [PDF]
, 1998 For pt.1 see ibid., p.933-42 (1998). A number of methods have been proposed in the literature for estimating scene-structure and ego-motion from a sequence of images using dynamical models. Despite the fact that all methods may be derived from a “natural”
Perona, Pietro, Soatto, Stefano
core +1 more source
Multi-stage Antenna Selection for Adaptive Beamforming in MIMO Arrays
, 2019 Increasing the number of transmit and receive elements in multiple-input-multiple-output (MIMO) antenna arrays imposes a substantial increase in hardware and computational costs.
Aboutanios, Elias +2 more
core +1 more source
A Real-Time Millimeter-Wave Phased Array MIMO Channel Sounder
, 2017 In this paper, we present a novel real-time MIMO channel sounder for 28 GHz. Until now, the common practice to investigate the directional characteristics of millimeter-wave channels has been using a rotating horn antenna.
Bas, C. Umit +7 more
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Optimal Precoders for Tracking the AoD and AoA of a mm-Wave Path [PDF]
, 2018 In millimeter-wave channels, most of the received energy is carried by a few paths. Traditional precoders sweep the angle-of-departure (AoD) and angle-of-arrival (AoA) space with directional precoders to identify directions with largest power.
Garcia, Nil +2 more
core +2 more sources