86 Hits in 4.1 sec

De-ghosting of tomographic images in a radar network with sparse angular sampling

Angie Fasoula, Hans Driessen, Piet van Genderen
2010 International journal of microwave and wireless technologies  
Discrete 2D radar target models can be estimated using high range resolution (HRR) data, measured at a sparse system of view angles.  ...  This being the main objective, incoherent tomographic processing of HRR data from a distributed surveillance system, made up of several radar nodes, is studied in this paper.  ...  All the four radars provide HRR data in K ¼ 6 scans.  ... 
doi:10.1017/s1759078710000358 fatcat:nfnhqvh5gvfubb7iluzxq2c3sa


Iulian Constantin Vizitiu
2013 Electromagnetic Waves  
In addition, using a real database belonging to the high-resolution radar (HRR) imagery, the superiority of the proposed decision fusion technique related to its standard version and other well-known decision  ...  an appropriate set of EM sensors and high-quality decision fusion techniques, respectively.  ...  corresponding to the signal subspace, for the case when the data are processed column by column and row by row respectively; (5) ESPRIT-2D reconstruction of the target image (i.e., estimation of the target  ... 
doi:10.2528/pier13031103 fatcat:c4s2nu2iibentmuskbyyijfxmq


Jaime Calvo-Gallego, F. Pérez-Martínez
2012 Electromagnetic Waves  
A simple traffic surveillance system based on the extraction of features from range-Doppler radar images is addressed. The concept exploits the High-Resolution Radars (HRR) properties.  ...  coherent and non-coherent integrated range profiles.  ...  ACKNOWLEDGMENT This work was supported by the Project TEC2008-02148/TEC of the National Board of Scientific and Technology Research.  ... 
doi:10.2528/pier12011809 fatcat:na6o2fwsczb4zd3ezsjanbg3bq

Geometric invariance for synthetic aperture radar (SAR) sensors

Vincent J. Velten, Edmund G. Zelnio
1998 Algorithms for Synthetic Aperture Radar Imagery V  
Synthetic Aperture Radar (SAR) senscrs have many advantages over electro-optical sensors (EO) for target recognition applications. such as range-independent r5solution and superior poor weather performance  ...  However, the relative unavailability of SAR data to the basic research community has retarded analysis of the fundamental invariant properties of !  ...  Zelnio for countless hours of discussion concerning ATR, SAR signal processing, and RF phenomenology.  ... 
doi:10.1117/12.321821 fatcat:qqoojfkdwre3fgnkdwtcsgkpc4

Extended Range Profiling in Stepped-Frequency Radar with Sparse Recovery [article]

Yang Hu, Yimin Liu, Huadong Meng, Xiqin Wang
2010 arXiv   pre-print
Furthermore, we use collected data from real SF radar to generate extended target high-resolution range (HRR) profile.  ...  Based on compressed sensing theory, a new algorithm of high-resolution range profiling for stepped-frequency (SF) radar suffering from missing pulses is proposed.  ...  In SF radars, the 'stretch' processing method [2] , based on inverse discrete Fourier transform (IDFT) technique, can acquire high-range resolution (HRR) profiles with narrow instantaneous bandwidth and  ... 
arXiv:1009.4969v3 fatcat:lff5tspbvneixkol66ztp7o2c4

Target identification performance improvement from enhanced HRR radar clutter suppression

Bart Kahler, Erik Blasch
2009 Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)  
MSS clutter suppressed HRR data; and (3) develop a confusion-matrix identity fusion result for Simultaneous Tracking and Identification (STID).  ...  Typical radar clutter suppression algorithms developed for processing moving ground target data not only remove the surrounding clutter, but a portion of the target signature.  ...  ACKNOWLEDGMENTS The authors would like to thank Tim Ross for significant discussions and coordination in the Confusion Matrix DLF development.  ... 
doi:10.1109/naecon.2009.5426625 fatcat:softx7bj4zdwleru53vcoyv2h4

Robust HRR radar target identification by hybridization of HMM and eigen-template-based matched filtering

Anindya S. Paul, Arnab K. Shaw, Firooz A. Sadjadi
2003 Automatic Target Recognition XIII  
The proposed hybrid algorithm combines Eigen-Template based Matched Filtering (ETMF) and Hidden Markov modeling (HMM) techniques to achieve superior HRR-ATR performance.  ...  In this paper, a new 1-D hybrid Automatic Target Recognition (ATR) algorithm is developed for sequential High Range Resolution (HRR) radar signatures.  ...  In the testing process, a given set of sequential HRR profiles under test are submitted to all HMM models, and the data is associated with that target for which the respective HMM yields the maximum likelihood  ... 
doi:10.1117/12.487554 fatcat:jzxumtwfxbegbbg6ivpppiam7a


Xinzheng Zhang, Qizheng Wu, Shujun Liu, Jianhong Qin, Wei Song
2014 Progress in Electromagnetics Research B  
A new approach to classify synthetic aperture radar (SAR) targets is presented based on high range resolution (HRR) profiles time-frequency matrix non-negative sparse coding (NNSC).  ...  Firstly, SAR target images have been converted into HRR profiles. And the non-negative time-frequency matrix for each of the profiles is obtained by using an adaptive Gaussian representation (AGR).  ...  A two-dimensional (2D) inverse FFT is taken of S(d, c) to obtain the corresponding phase history data.  ... 
doi:10.2528/pierb14040401 fatcat:m4ay2r4fijdqxlzp6kbtyruzbu

Entropy-based detection of manoeuvring range-spread targets in homogeneous weather clutter

Shu-wen Xu, Peng-lang Shui
2013 EURASIP Journal on Advances in Signal Processing  
Finally, we assess the proposed detector by the raw radar target data collected by high range resolution radar and simulated weather clutter.  ...  The observation window contains a detection window and a reference window, where the received data in reference window is clutter-only secondary data.  ...  Guangxi Key Lab of Wireless Wideband Communication &Signal Processing (12205).  ... 
doi:10.1186/1687-6180-2013-94 fatcat:nzki53wdozge7h2uoukkggsmui

Focused ISAR Imaging of Rotating Target in Far-Field Compact Range Anechoic Chamber

Shahida Qadir, Fan Yanyu, Ahmed Amein, Fathy Ahmed
2011 International Conference on Aerospace Sciences and Aviation Technology  
The processing applied to the experimental data is a combination of two high resolution processes: dev of High Range Resolution profile (HRR) in the down range using stepped frequency waveform covering  ...  a total band of 4GHz, and the development of high resolution profile in cross-range is achieved using ISAR technique.  ...  Acknowledgements The authors are especially grateful to Syed Khurram Naqib and Compact Range staff for conducting experiments and providing data for our work.  ... 
doi:10.21608/asat.2011.23422 fatcat:eiaqh55rnnbavodkolwsqmsboe

Research of a Radar Imaging Algorithm Based on High Pulse Repetition Random Frequency Hopping Synthetic Wideband Waveform

Songhua He, Xiaotian Wu
2019 Sensors  
of target and clutter, analyzed the special range-Doppler coupling effect and its influence on imaging, and proposes a method of imaging with pipeline-parallel processing based on generalized 2D matched-filtering  ...  Aiming at the imaging algorithm of high-pulse-repetition random-frequency-hopping synthetic wideband radar on a supersonic/hypersonic aircraft platform, this study established an echo simulation model  ...  different from that of conventional stepped frequency synthetic wideband imaging radar, which can obtain HRR range profile by using the data of one frame.  ... 
doi:10.3390/s19245424 pmid:31835370 pmcid:PMC6960524 fatcat:p53sodjmcbhjla3432wbm6a4me

Deep Learning Network for Classifying Target of Same Shape using RCS Time Series [chapter]

Rashmi Narasimhamurthy, Osamah Ibrahim Khalaf
2021 Air Traffic Management and Control  
We investigated various machine learning classifiers methods to categorize available radar target data.  ...  The concept is to focus on new technique of ML for analyzing the input data and to attain a better accuracy.  ...  The radar system was set up in a lab setting, information was acquired for three micro UASs, and the data was used to test the signal processing technique [26] .  ... 
doi:10.5772/intechopen.99619 fatcat:ido4h25wx5bqpct45wtysrtkmu

Iterative adaptive approach for unambiguous wideband radar target detection

Nikita Petrov, Francois Le Chevalier
2015 2015 European Radar Conference (EuRAD)  
Iterative Adaptive Approach is applied to solve this problem and shown to be an attractive solution. Capability of the proposed processing is shown via numerical simulations.  ...  Experimental data sets demonstrate 25 dB improvement in detection performance of a moving target at the first blind velocity.  ...  ACKNOWLEDGMENT The authors would like to thank Oleg Krasnov and Fred van der Zwan for their help with PARSAX experimental data and Alexander Yarovoy for reviewing the paper.  ... 
doi:10.1109/eurad.2015.7346233 fatcat:dz2gbwkzabb3voywrcrrsjwfja

Analysis of Frequency Agile Radar via Compressed Sensing [article]

Tianyao Huang, Yimin Liu, Xingyu Xu, Yonina C. Eldar, Xiqin Wang
2018 arXiv   pre-print
Frequency agile radar (FAR) is known to have excellent electronic counter-countermeasures (ECCM) performance and the potential to realize spectrum sharing in dense electromagnetic environments.  ...  Numerical simulations and field experiments validate the theoretical findings and demonstrate the effectiveness of CS approaches to FAR.  ...  With data in that CRR bin, we perform range-Doppler processing of the target. We apply the matched filter (17) and the OMP algorithm to jointly estimate the HRR profile and Doppler of the target.  ... 
arXiv:1808.09124v2 fatcat:7g7wfaaq3jg6rhibtquaylbfuq

Spatially Diverse ISAR Imaging for Classification Performance Enhancement

Stefan Brisken, Dietmar Matthes, Torsten Mathy, Josef Worms
2011 International Journal of Electronics and Telecommunications  
Spatially Diverse ISAR Imaging for Classification Performance Enhancement One popular approach to the problem of Non-Cooperative Target Identification is the use of 2D Inverse SAR images.  ...  The main focus lies in the description and results of a multistatic ISAR experiment carried out at Fraunhofer FHR.  ...  For the SDR, this operation is performed online on FPGA while for the bistatic receiver the data has to be post-processed. The SDR furthermore applies a hamming window onto the HRR profiles.  ... 
doi:10.2478/v10177-011-0002-2 fatcat:kd2u24gmcveldgnh6crplnb7im
« Previous Showing results 1 — 15 out of 86 results