Pub Date : 2014-10-16DOI: 10.1109/RADAR.2014.7060271
C. Clemente, L. Pallotta, I. Proudler, A. De Maio, J. Soraghan, A. Farina
In the modern battlefield scenario multiple sources of information may be exploited to mitigate uncertainty. Polarization and spatial diversity can provide useful information for specific and critical tasks such as the Automatic Target Recognition (ATR). In this paper the use of pseudo-Zernike moments applied to the full-polarimetric Gotcha dataset is presented. Specifically improved single platform ATR performance is demonstrated through the use of multiple observations.
{"title":"Multi-sensor full-polarimetric SAR Automatic Target Recognition using pseudo-Zernike moments","authors":"C. Clemente, L. Pallotta, I. Proudler, A. De Maio, J. Soraghan, A. Farina","doi":"10.1109/RADAR.2014.7060271","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060271","url":null,"abstract":"In the modern battlefield scenario multiple sources of information may be exploited to mitigate uncertainty. Polarization and spatial diversity can provide useful information for specific and critical tasks such as the Automatic Target Recognition (ATR). In this paper the use of pseudo-Zernike moments applied to the full-polarimetric Gotcha dataset is presented. Specifically improved single platform ATR performance is demonstrated through the use of multiple observations.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"224 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130722455","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 : 2014-10-13DOI: 10.1109/RADAR.2014.7060441
Antoine Bonnetat, J. Hode, D. Dallet, G. Ferré
This paper proposes a new efficient fully digital adaptive method for arbitrary frequency-response mismatches of time-interleaved analog-to-digital converters. It uses FIR filters for signal correction. Correlations between TIADC output data and two different frequency shifted images of these data are used for mismatch estimation. This method has been evaluated in the case of 4-channel TIADCs but it can be extended to any number of channels.. Hardware implementation of this new algorithm was carried out and successfully tested at a 2.56 GHz sampling rate on both single tone and dual tone signals. Efficient spur cancellation (30 dB typically) using 3-tap filters for single tone signals and 7-tap filters for dual tone signals has been demonstrated.
{"title":"A new fully digital frequency response mismatch compensation algorithm for time interleaved analog-to-digital converters","authors":"Antoine Bonnetat, J. Hode, D. Dallet, G. Ferré","doi":"10.1109/RADAR.2014.7060441","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060441","url":null,"abstract":"This paper proposes a new efficient fully digital adaptive method for arbitrary frequency-response mismatches of time-interleaved analog-to-digital converters. It uses FIR filters for signal correction. Correlations between TIADC output data and two different frequency shifted images of these data are used for mismatch estimation. This method has been evaluated in the case of 4-channel TIADCs but it can be extended to any number of channels.. Hardware implementation of this new algorithm was carried out and successfully tested at a 2.56 GHz sampling rate on both single tone and dual tone signals. Efficient spur cancellation (30 dB typically) using 3-tap filters for single tone signals and 7-tap filters for dual tone signals has been demonstrated.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129755532","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 : 2014-10-13DOI: 10.1109/RADAR.2014.7060325
Panagiotis Piteros, L. Thirion-Lefevre, R. Guinvarc’h, M. Lambert
The idea of applying the cognitive radar principle to the radar observations of forests is presented. It implies an adaptive design of experiments (DOE) that will allow us to construct probabilistic surrogate models with a known level of uncertainty. These models reduce significantly the computational cost, which is mandatory when running many numerical simulations in various configurations.
{"title":"Cognitive kriging metamodels for forest characterization and target detection","authors":"Panagiotis Piteros, L. Thirion-Lefevre, R. Guinvarc’h, M. Lambert","doi":"10.1109/RADAR.2014.7060325","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060325","url":null,"abstract":"The idea of applying the cognitive radar principle to the radar observations of forests is presented. It implies an adaptive design of experiments (DOE) that will allow us to construct probabilistic surrogate models with a known level of uncertainty. These models reduce significantly the computational cost, which is mandatory when running many numerical simulations in various configurations.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"276 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115819767","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 : 2014-10-13DOI: 10.1109/RADAR.2014.7060251
Hongbo Sun, F. Brigui, M. Lesturgie
Choosing a proper waveform is a critical task for the implementation of multiple-input multiple-output (MIMO) radars. In addition to the general requirements for radar waveforms such as good resolution, low sidelobes, etc, MIMO radar waveforms also should possess good orthogonality. In this paper we give a brief overview of MIMO radar waveforms, which are classified into four categories: (1) time division multiple access (TDMA), (2) frequency division multiple access (FDMA), (3) Doppler division multiple access (DDMA), and (4) code division multiple access (CDMA). A special circulating MIMO waveform is also addressed The properties as well as application limitations of different waveforms are analyzed and compared. Some simulations results are also presented to illustrate the respective performance of different waveforms.
{"title":"Analysis and comparison of MIMO radar waveforms","authors":"Hongbo Sun, F. Brigui, M. Lesturgie","doi":"10.1109/RADAR.2014.7060251","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060251","url":null,"abstract":"Choosing a proper waveform is a critical task for the implementation of multiple-input multiple-output (MIMO) radars. In addition to the general requirements for radar waveforms such as good resolution, low sidelobes, etc, MIMO radar waveforms also should possess good orthogonality. In this paper we give a brief overview of MIMO radar waveforms, which are classified into four categories: (1) time division multiple access (TDMA), (2) frequency division multiple access (FDMA), (3) Doppler division multiple access (DDMA), and (4) code division multiple access (CDMA). A special circulating MIMO waveform is also addressed The properties as well as application limitations of different waveforms are analyzed and compared. Some simulations results are also presented to illustrate the respective performance of different waveforms.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126633543","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 : 2014-10-13DOI: 10.1109/RADAR.2014.7060452
Touati Nadjah, Tatkeu Charles, Rivenq Atika, C. Thierry
Costas codes are a variant of frequency hopping codes that achieve the ≪thumbtack≫ auto-ambiguity function needed in radar applications. However, they may show poor cros-sambiguity properties when selected and assigned randomly which makes them poorly adapted to multiuser radar applications. In this paper, we propose a multiuser adaptation of phase coded Costas signals. In fact, this modified version of Costas signals consists in replacing Costas constant frequency sub-pulses with phase codes. This modification allows to suppress autocorrelation function grating lobes that appears when orthogonality condition of Costas codes is not satisfied. Furthermore, the later design adds a degree of freedom for a possible adaptation of these waveforms to a multiuser context. Indeed, in the current work, the subpulse phase codes are used to generate a set of waveforms with good cross-correlation properties. Specific conditions on these codes are stated in order to achieve the needed cross-correlation properties, using a same Costas code. The auto-ambiguity and cross-ambiguity properties are also remarkable but within a bounded Doppler region. Furthermore, the families are expanded using different Costas codes with particular properties. Hence, since the phase codes and Costas codes diversity are used, the number of synthesized waveforms is improved.
{"title":"Multiuser phase coded costas signals with improved cross-correlation and partial cross-ambiguity properties","authors":"Touati Nadjah, Tatkeu Charles, Rivenq Atika, C. Thierry","doi":"10.1109/RADAR.2014.7060452","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060452","url":null,"abstract":"Costas codes are a variant of frequency hopping codes that achieve the ≪thumbtack≫ auto-ambiguity function needed in radar applications. However, they may show poor cros-sambiguity properties when selected and assigned randomly which makes them poorly adapted to multiuser radar applications. In this paper, we propose a multiuser adaptation of phase coded Costas signals. In fact, this modified version of Costas signals consists in replacing Costas constant frequency sub-pulses with phase codes. This modification allows to suppress autocorrelation function grating lobes that appears when orthogonality condition of Costas codes is not satisfied. Furthermore, the later design adds a degree of freedom for a possible adaptation of these waveforms to a multiuser context. Indeed, in the current work, the subpulse phase codes are used to generate a set of waveforms with good cross-correlation properties. Specific conditions on these codes are stated in order to achieve the needed cross-correlation properties, using a same Costas code. The auto-ambiguity and cross-ambiguity properties are also remarkable but within a bounded Doppler region. Furthermore, the families are expanded using different Costas codes with particular properties. Hence, since the phase codes and Costas codes diversity are used, the number of synthesized waveforms is improved.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125385456","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 : 2014-10-13DOI: 10.1109/RADAR.2014.7060414
S. Azarian, M. Lesturgie
VOR is a well-known system used for the routing of aircrafts worldwide. The system is also worth to provide two interesting properties, first to serve as donor to passive radar, second to provide a specific space coding, used for the navigation and that will be precisely explored to localize targets detected in a passive radar mode. VOR is also interesting as it operates in the lower VHF band, a frequency band highly coveted for its counter stealth properties and high detectability of air targets. The paper addresses the potential of this kind of transmitter, considered solely and also in a multistatic configuration.
{"title":"Revisiting VOR transmitters: MIMO passive radar using legacy infrastructure","authors":"S. Azarian, M. Lesturgie","doi":"10.1109/RADAR.2014.7060414","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060414","url":null,"abstract":"VOR is a well-known system used for the routing of aircrafts worldwide. The system is also worth to provide two interesting properties, first to serve as donor to passive radar, second to provide a specific space coding, used for the navigation and that will be precisely explored to localize targets detected in a passive radar mode. VOR is also interesting as it operates in the lower VHF band, a frequency band highly coveted for its counter stealth properties and high detectability of air targets. The paper addresses the potential of this kind of transmitter, considered solely and also in a multistatic configuration.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128266612","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 : 2014-10-13DOI: 10.1109/RADAR.2014.7060426
A. Breloy, G. Ginolhac, F. Pascal, P. Forster
Space time Adaptive Processing (STAP) for airborne RADAR fits the context of a disturbance composed of a Low Rank (LR) clutter, here modeled by a Compound Gaussian (CG) process, plus a white Gaussian noise (WGN). In such context, the corresponding LR adaptive filters used to detect a target require less training vectors than classical methods to reach equivalent performance. Unlike the classical filter which is based on the Covariance Matrix (CM) of the noise, the LR filter is based on the clutter subspace projector, which is usually derived from a Singular Value Decomposition (SVD) of a noise CM estimate. Regarding to the considered model of LR-CG plus WGN, recent results are providing both direct estimators of the clutter subspace [1][2] and an exact MLE of the noise CM [3]. To promote the use of these new estimation methods, this paper proposes to apply them to realistic STAP simulations.
{"title":"Numerical performances of low rank stap based on different heterogeneous clutter subspace estimators","authors":"A. Breloy, G. Ginolhac, F. Pascal, P. Forster","doi":"10.1109/RADAR.2014.7060426","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060426","url":null,"abstract":"Space time Adaptive Processing (STAP) for airborne RADAR fits the context of a disturbance composed of a Low Rank (LR) clutter, here modeled by a Compound Gaussian (CG) process, plus a white Gaussian noise (WGN). In such context, the corresponding LR adaptive filters used to detect a target require less training vectors than classical methods to reach equivalent performance. Unlike the classical filter which is based on the Covariance Matrix (CM) of the noise, the LR filter is based on the clutter subspace projector, which is usually derived from a Singular Value Decomposition (SVD) of a noise CM estimate. Regarding to the considered model of LR-CG plus WGN, recent results are providing both direct estimators of the clutter subspace [1][2] and an exact MLE of the noise CM [3]. To promote the use of these new estimation methods, this paper proposes to apply them to realistic STAP simulations.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130735344","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 : 2014-10-13DOI: 10.1109/RADAR.2014.7060394
A. Périgaud, N. Delhote, Rémi Ségalen, Y. Mancuso, P. Garrec
In this paper compact ceramic filters, based on the principle of combline filters, are proposed. These filters offer a very good tradeoff between size and performances while offering a wide spurious free region. Two different filters are proposed here: a fixed frequency (X-band) and a tunable 5 pole Chebyshev. The expected frequency coverage is close to 56% f0.
{"title":"Compact reconfigurable ceramic filter based on combline type 3-D resonators","authors":"A. Périgaud, N. Delhote, Rémi Ségalen, Y. Mancuso, P. Garrec","doi":"10.1109/RADAR.2014.7060394","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060394","url":null,"abstract":"In this paper compact ceramic filters, based on the principle of combline filters, are proposed. These filters offer a very good tradeoff between size and performances while offering a wide spurious free region. Two different filters are proposed here: a fixed frequency (X-band) and a tunable 5 pole Chebyshev. The expected frequency coverage is close to 56% f0.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128588118","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 : 2014-10-13DOI: 10.1109/RADAR.2014.7060317
M. Biancheri-Astier, A. Saintenoy, V. Ciarletti
We present the project of developing a radar system presenting agility resulting from a great versatility in the emission of the wavefront. The idea is to build a system using an array of antennas that can automatically reconfigure itself to focus its radiance on a desired target. This new microwave sensor is intended to detect and characterize a target buried in a medium that can be inhomogeneous in various fields like geophysics, medical, planetology, .... The aim is illustrated by analytical simulations using the DORT method. The instrumental developments are described, with numerical validations of the principle of misalignment of the antenna beam. The project emerged after a CNES R&T study for modify the prototype of WISDOM radar.
{"title":"Development of a planetary georadar prototype with agile beam (AGILE)","authors":"M. Biancheri-Astier, A. Saintenoy, V. Ciarletti","doi":"10.1109/RADAR.2014.7060317","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060317","url":null,"abstract":"We present the project of developing a radar system presenting agility resulting from a great versatility in the emission of the wavefront. The idea is to build a system using an array of antennas that can automatically reconfigure itself to focus its radiance on a desired target. This new microwave sensor is intended to detect and characterize a target buried in a medium that can be inhomogeneous in various fields like geophysics, medical, planetology, .... The aim is illustrated by analytical simulations using the DORT method. The instrumental developments are described, with numerical validations of the principle of misalignment of the antenna beam. The project emerged after a CNES R&T study for modify the prototype of WISDOM radar.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":" 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120935011","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 : 2014-10-13DOI: 10.1109/RADAR.2014.7060309
S. Saillant, P. Dorey, M. Lesturgie, L. Thirion-Lefevre
The foliage has the characteristic to absorb electromagnetic waves. Attenuation is intrinsic to the propagation of radiation through any medium. Propagation through foliage leads to attenuation of the radar signal.
树叶有吸收电磁波的特性。衰减是辐射通过任何介质传播所固有的。通过树叶传播会导致雷达信号的衰减。
{"title":"Evaluation of the attenuation in L-band due to the foliage in function of the elevation angle","authors":"S. Saillant, P. Dorey, M. Lesturgie, L. Thirion-Lefevre","doi":"10.1109/RADAR.2014.7060309","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060309","url":null,"abstract":"The foliage has the characteristic to absorb electromagnetic waves. Attenuation is intrinsic to the propagation of radiation through any medium. Propagation through foliage leads to attenuation of the radar signal.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114835169","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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