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- 摘要
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- 实验方案
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[IEEE 2018 17th International Conference on Ground Penetrating Radar (GPR) - Rapperswil, Switzerland (2018.6.18-2018.6.21)] 2018 17th International Conference on Ground Penetrating Radar (GPR) - An FPGA-based Flexible and MIMO-capable GPR System
摘要： Ground penetrating radar (GPR) has broad applications in non-destructive subsurface imaging. Most GPRs on the market are bistatic devices that illuminate the buried objects using analog pulses with simple Gaussian-like shapes. These GPRs suffer from drift in the scan results and have either a low-resolution or a low depth of scan, which limits their application. High resolution along with an increased depth of scan can be achieved by transmitting maximal length pseudorandom sequences (m-sequences) which enable pulse compression due to their near-ideal autocorrelation properties. In addition, improved object localization and reduced drift can be obtained with the spatial diversity offered by a MIMO transceiver. This paper discusses the design and implementation of a 8×8 MIMO-capable impulse-based GPR that transmits m-sequences generated on a low-cost FPGA platform, performs a quadrature transform on the received signal to reduce computation, and implements sub-sampling to sample the quadrature-converted signals using low-speed ADCs. Preliminary experimental results are also presented.
关键词： multistatic,MIMO,pulse compression,subsampling,m-sequence,GPR,Ground penetrating radar
更新于2025-09-09 09:28:46
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Topology Design for Geosynchronous Spaceborne–Airborne Multistatic SAR
摘要： Geosynchronous (GEO) spaceborne–airborne multistatic synthetic aperture radar (GEO MulSAR) is more flexible and accessible in remote sensing applications because of the high-altitude illuminator and the separation of the receivers and transmitter. In addition, the information obtained by the multiple airborne receivers can be fused to enhance the spatial resolution. However, the fused spatial resolution severely depends on the applied multistatic topology. To achieve the optimal fused spatial resolution by properly adjusting the imaging topology, a topology design method is proposed in this letter. First, the spatial resolution model of GEO MulSAR is given, and the dependence of the spatial resolution on the multistatic topology is analyzed in detail. Then, a topology design method is proposed to obtain the best multistatic topology that simultaneously optimizes the resolution cell area and resolution disequilibrium factor. Finally, the simulation results validate the effectiveness of the proposed method, and some insights into designing the multistatic topology are given.
关键词： resolution enhancement,topology design,Geosynchronous (GEO) spaceborne–airborne synthetic aperture radar (SAR),multistatic SAR
更新于2025-09-09 09:28:46
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[IEEE 2018 48th European Microwave Conference (EuMC) - Madrid, Spain (2018.9.23-2018.9.27)] 2018 48th European Microwave Conference (EuMC) - Size Determination in Particle Streams Using a Multistatic Dual Frequency Millimeter Wave Radar
摘要： A multistatic dual frequency radar operating at 91.5 GHz and 150.3 GHz is designed and utilized to measure particle dimensions in a multidisperse particle stream. From the physical relations a size measurement routine is derived. In a numerical study we then investigate how a multistatic antenna configuration can improve the state-of-the-art method which usually is performed with a monostatic radar. Based on the simulation results, we present the layout of the radar sensor and experimental setup. Finally, measurement results are provided and discussed.
关键词： radar,remote measurement,particle size,Antenna,environmental monitoring,complex source beam (CSB),configuration,particle streams,multistatic
更新于2025-09-04 15:30:14
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[IEEE 2018 15th European Radar Conference (EuRAD) - Madrid, Spain (2018.9.26-2018.9.28)] 2018 15th European Radar Conference (EuRAD) - Size determination in Particle Streams using a Multistatic Dual Frequency Millimeter Wave Radar
摘要： A multistatic dual frequency radar operating at 91.5 GHz and 150.3 GHz is designed and utilized to measure particle dimensions in a multidisperse particle stream. From the physical relations a size measurement routine is derived. In a numerical study we then investigate how a multistatic antenna configuration can improve the state-of-the-art method which usually is performed with a monostatic radar. Based on the simulation results, we present the layout of the radar sensor and experimental setup. Finally, measurement results are provided and discussed.
关键词： radar,remote measurement,particle size,environmental monitoring,complex source beam (CSB),particle streams,multistatic,antenna configuration
更新于2025-09-04 15:30:14
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[IEEE 2018 15th European Radar Conference (EuRAD) - Madrid, Spain (2018.9.26-2018.9.28)] 2018 15th European Radar Conference (EuRAD) - Combined backscatter and forward scatter radar detection of people
摘要： A sensor network has been developed consisting of four RF nodes that automatically set up a network organization and synchronize wirelessly. In the system bistatic backscatter and forward scatter radar measurements are combined. For detection of small and slow targets, like humans, suppression of the background including the direct signals between the nodes is crucial. However, measurements have shown that the level of synchronization between the nodes is insufficient for full coherent background subtraction. As a result, detection of small and slow targets based on bistatic backscatter measurements is difficult particularly at short range. Faster moving targets such as cyclists or joggers can be detected. The forward scatter detection of persons traversing the baselines between the nodes is based on amplitude variations of the direct signals and therefore less sensitive to residual synchronization errors. Forward scatter detection of persons crossing the baselines works well even at short range.
关键词： forward scatter radar,multistatic radar,radar detection and tracking
更新于2025-09-04 15:30:14