Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060416
J. Euziére, R. Guinvarc’h, M. Lesturgie, B. Uguen, R. Gillard
This paper introduces the use of Time-modulated array methods to realize a dual function array. It is able to do a radar function in the mainlobe, while realizing a communication in the side lobe.
本文介绍了利用时调制阵列的方法来实现双功能阵列。它可以在主瓣中实现雷达功能，在副瓣中实现通信功能。
{"title":"Dual function radar communication Time-modulated array","authors":"J. Euziére, R. Guinvarc’h, M. Lesturgie, B. Uguen, R. Gillard","doi":"10.1109/RADAR.2014.7060416","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060416","url":null,"abstract":"This paper introduces the use of Time-modulated array methods to realize a dual function array. It is able to do a radar function in the mainlobe, while realizing a communication in the side lobe.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"64 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132791148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper studies sparse image reconstruction based on digital video broadcasting-satellites (DVB-S) system. The signal model is slightly different from our previous research [1-2], i.e. we consider the Swerling I model to characterize the target response, which means the scattering coefficients of the target resonate at different frequencies. Due to this effect, the performance of the conventional sparse recovery methods would decrease considerably. By utilizing the sparse learning via iterative minimization (SLIM) with the Laplace priors, we propose an effective algorithm named Laplace-SLIM to deal with the aforementioned joint sparse recovery problem, which can be seen as a kind of reweighted l1-norm algorithm. Simulation results verify the effectiveness of the proposed method and related analysis.
{"title":"Sparse passive radar imaging based on DVB-S using the Laplace-SLIM algorithm","authors":"Yu Xiaofei, Tianyun Wang, Xinfei Lu, Chang Chen, Weidong Chen","doi":"10.1109/RADAR.2014.7060281","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060281","url":null,"abstract":"This paper studies sparse image reconstruction based on digital video broadcasting-satellites (DVB-S) system. The signal model is slightly different from our previous research [1-2], i.e. we consider the Swerling I model to characterize the target response, which means the scattering coefficients of the target resonate at different frequencies. Due to this effect, the performance of the conventional sparse recovery methods would decrease considerably. By utilizing the sparse learning via iterative minimization (SLIM) with the Laplace priors, we propose an effective algorithm named Laplace-SLIM to deal with the aforementioned joint sparse recovery problem, which can be seen as a kind of reweighted l1-norm algorithm. Simulation results verify the effectiveness of the proposed method and related analysis.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128190087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060341
S. Blunt, J. Metcalf, John Jakabosky, B. Himed
A multi-waveform version of space-time adaptive processing denoted as MuW-STAP (or simply μ-STAP) was recently developed that incorporates the training data generated by secondary waveform/filter pairs into the estimation of the sample covariance matrix. This additional training data was found to improve robustness to heterogeneous clutter. Here SINR analysis is used to evaluate the μ-STAP approach under various clutter conditions and with multiple additional sets of training data obtained through the use of multiple different pulse compression filters applied to the same received data.
{"title":"SINR analysis of multi-waveform STAP","authors":"S. Blunt, J. Metcalf, John Jakabosky, B. Himed","doi":"10.1109/RADAR.2014.7060341","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060341","url":null,"abstract":"A multi-waveform version of space-time adaptive processing denoted as MuW-STAP (or simply μ-STAP) was recently developed that incorporates the training data generated by secondary waveform/filter pairs into the estimation of the sample covariance matrix. This additional training data was found to improve robustness to heterogeneous clutter. Here SINR analysis is used to evaluate the μ-STAP approach under various clutter conditions and with multiple additional sets of training data obtained through the use of multiple different pulse compression filters applied to the same received data.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131655086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060380
D. Gromek, P. Krysik, K. Kulpa, P. Samczyński, M. Malanowski
A new approach to passive bistatic radar imaging using DVB-T signals as illuminators of opportunity is presented. The concept has been verified using ground based mobile platforms as a radar receiver carrier. The paper presents an algorithm description and its verification using both simulated and real data gathered during an outdoor measurement campaign.
{"title":"Ground-based mobile passive imagery based on a DVB-T signal of opportunity","authors":"D. Gromek, P. Krysik, K. Kulpa, P. Samczyński, M. Malanowski","doi":"10.1109/RADAR.2014.7060380","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060380","url":null,"abstract":"A new approach to passive bistatic radar imaging using DVB-T signals as illuminators of opportunity is presented. The concept has been verified using ground based mobile platforms as a radar receiver carrier. The paper presents an algorithm description and its verification using both simulated and real data gathered during an outdoor measurement campaign.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134422328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060392
C. Tripon-Canseliet, J. Martinaud, C. Renard, J. Chazelas
This document presents insights on new generation multilayer `Tile' phased array antennas with inclusion of metamaterial structures interacting with electromagnetic wave propagation in order to improve radiating performance of the antenna (reduction/mitigation of `blindness' phenomenon, reduction of side and back radiation), and frequency agility by optical control.
{"title":"Contribution of metamaterials to improvement of scan performance and reconfigurability of phased array antennas","authors":"C. Tripon-Canseliet, J. Martinaud, C. Renard, J. Chazelas","doi":"10.1109/RADAR.2014.7060392","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060392","url":null,"abstract":"This document presents insights on new generation multilayer `Tile' phased array antennas with inclusion of metamaterial structures interacting with electromagnetic wave propagation in order to improve radiating performance of the antenna (reduction/mitigation of `blindness' phenomenon, reduction of side and back radiation), and frequency agility by optical control.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133171725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060243
Stefan Brisken
This paper is concerned with recent and future developments in the field of multistatic radar imaging of moving targets. It briefly reviews traditional monostatic ISAR imaging and identifies its drawbacks. We then present ideas, some of them have meanwhile been verified in experiments, how a multistatic setup can overcome some of these problems. Clearly, a multistatic setup leads to increased complexity and new problems. We display these new problems and present approaches to solve some of them. We use mind maps to illustrate the context. Multichannel techniques like interferometric or polarimetric ISAR are out of the scope of this paper.
{"title":"Multistatic ISAR - chances and challenges","authors":"Stefan Brisken","doi":"10.1109/RADAR.2014.7060243","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060243","url":null,"abstract":"This paper is concerned with recent and future developments in the field of multistatic radar imaging of moving targets. It briefly reviews traditional monostatic ISAR imaging and identifies its drawbacks. We then present ideas, some of them have meanwhile been verified in experiments, how a multistatic setup can overcome some of these problems. Clearly, a multistatic setup leads to increased complexity and new problems. We display these new problems and present approaches to solve some of them. We use mind maps to illustrate the context. Multichannel techniques like interferometric or polarimetric ISAR are out of the scope of this paper.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128596676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060354
L. Ulander, A. Gustavsson, T. Jonsson, R. Ragnarsson, G. Stenstrom
The paper presents results from developing and testing a bistatic SAR system for ground surveillance in the VHF band (25-83 MHz). It is based on two radars developed by FOI: The monostatic LORA system installed in an aircraft and the bistatic and passive CARINA system installed on a helicopter. CARINA is based on direct RF sampling of two receiver channels (2 × 14 bits @ 250 MSPS) together with continuous non-interrupted data storage capability. The system has recently been developed by FOI and is described in detail. System architecture, installation in the helicopter platform and results from early trials in bistatic SAR mode are described. Results show forest clutter can be significantly reduced in bistatic SAR geometries compared to the signature of a small truck (van).
{"title":"Development of CARINA bistatic VHF-band SAR","authors":"L. Ulander, A. Gustavsson, T. Jonsson, R. Ragnarsson, G. Stenstrom","doi":"10.1109/RADAR.2014.7060354","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060354","url":null,"abstract":"The paper presents results from developing and testing a bistatic SAR system for ground surveillance in the VHF band (25-83 MHz). It is based on two radars developed by FOI: The monostatic LORA system installed in an aircraft and the bistatic and passive CARINA system installed on a helicopter. CARINA is based on direct RF sampling of two receiver channels (2 × 14 bits @ 250 MSPS) together with continuous non-interrupted data storage capability. The system has recently been developed by FOI and is described in detail. System architecture, installation in the helicopter platform and results from early trials in bistatic SAR mode are described. Results show forest clutter can be significantly reduced in bistatic SAR geometries compared to the signature of a small truck (van).","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116832112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060423
Peter R. Drake, J. Bourgeois, A. Hopf, Francis Lok, D. McLaughlin
A Raytheon-developed dual polarization X-band active phased array radar has been designed and is being tested for use as a multi-mission, weather and surveillance, radar. The radar is optimized for integration into existing networks with the capability of being deployed on existing telecom, turbine or building infrastructures. The partnership between Raytheon and CASA brings together years of expertise to meet future requirements of en route and terminal air surveillance and weather remote sensing. This paper provides an update to this Raytheon dual polarization active phased array radar technology.
{"title":"Dual-polarization X-band phased array weather radar: Technology update","authors":"Peter R. Drake, J. Bourgeois, A. Hopf, Francis Lok, D. McLaughlin","doi":"10.1109/RADAR.2014.7060423","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060423","url":null,"abstract":"A Raytheon-developed dual polarization X-band active phased array radar has been designed and is being tested for use as a multi-mission, weather and surveillance, radar. The radar is optimized for integration into existing networks with the capability of being deployed on existing telecom, turbine or building infrastructures. The partnership between Raytheon and CASA brings together years of expertise to meet future requirements of en route and terminal air surveillance and weather remote sensing. This paper provides an update to this Raytheon dual polarization active phased array radar technology.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117126247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060267
Yufang Tang, Xueming Li, Yan Xu, Shuchang Liu, Shuxin Ouyang
Many of the most successful classifiers are based on convex surrogate loss functions. However, it is widely accepted that the 0 - 1 loss would be more natural for classification performance evaluation and many surrogate loss functions can be understood as convex approximations to the 0 - 1 loss. Therefore, in this paper, we attempt to minimize the 0 - 1 loss directly via Mixed Integer Programming and a maximum margin 0 - 1 loss is presented. To test the performance of the proposed loss measurement, two maximum margin 0 - 1 loss classifiers are implemented for binary classification and semi-supervised classification respectively. According to the experiment results of the publicly available UCI datasets, the maximum margin 0 - 1 loss approach has achieved superior performance. Meanwhile, in term of computational efficiency, with the rapid development of Mixed Integer Programming in recent years, the state-of-art solvers can output the global optimum solution of the proposed approach in seconds when the number of training instances N and the dimension of feature space D are relatively small (Empirically N ≤ 100, D ≤ 20). Therefore, it can already be adopted to solve small-scale classification problems in the real world.
{"title":"A Mixed Integer Programming approach to maximum margin 0 – 1 loss classification","authors":"Yufang Tang, Xueming Li, Yan Xu, Shuchang Liu, Shuxin Ouyang","doi":"10.1109/RADAR.2014.7060267","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060267","url":null,"abstract":"Many of the most successful classifiers are based on convex surrogate loss functions. However, it is widely accepted that the 0 - 1 loss would be more natural for classification performance evaluation and many surrogate loss functions can be understood as convex approximations to the 0 - 1 loss. Therefore, in this paper, we attempt to minimize the 0 - 1 loss directly via Mixed Integer Programming and a maximum margin 0 - 1 loss is presented. To test the performance of the proposed loss measurement, two maximum margin 0 - 1 loss classifiers are implemented for binary classification and semi-supervised classification respectively. According to the experiment results of the publicly available UCI datasets, the maximum margin 0 - 1 loss approach has achieved superior performance. Meanwhile, in term of computational efficiency, with the rapid development of Mixed Integer Programming in recent years, the state-of-art solvers can output the global optimum solution of the proposed approach in seconds when the number of training instances N and the dimension of feature space D are relatively small (Empirically N ≤ 100, D ≤ 20). Therefore, it can already be adopted to solve small-scale classification problems in the real world.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114319415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060310
H. Ghanmi, A. Khenchaf, F. Comblet
The aim of this paper is to study the influence of the pollutants (oil spills) on the electromagnetic signature of sea surface observed in bistatic configuration. Therefore, we will start the numerical analyses of the pollutants influence on the sea surface roughness. Then, we will evaluate the electromagnetic scattering coefficients of the contaminated sea surface (sea surface covered by oil layer) in bistatic case by using the numerical Forward-Backward Method (FBM). The model used for the numerical simulation of bistatic scattering coefficients of clean and contaminated sea surface has been analyzed as a function of various parameters (sea state, type of pollutant, incidence and observation angles, radar frequency and polarizations).
{"title":"Numerical simulation of bistatic electromagnetic scattering by contaminated sea surface","authors":"H. Ghanmi, A. Khenchaf, F. Comblet","doi":"10.1109/RADAR.2014.7060310","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060310","url":null,"abstract":"The aim of this paper is to study the influence of the pollutants (oil spills) on the electromagnetic signature of sea surface observed in bistatic configuration. Therefore, we will start the numerical analyses of the pollutants influence on the sea surface roughness. Then, we will evaluate the electromagnetic scattering coefficients of the contaminated sea surface (sea surface covered by oil layer) in bistatic case by using the numerical Forward-Backward Method (FBM). The model used for the numerical simulation of bistatic scattering coefficients of clean and contaminated sea surface has been analyzed as a function of various parameters (sea state, type of pollutant, incidence and observation angles, radar frequency and polarizations).","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115340928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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