Pub Date : 2018-06-01DOI: 10.23919/IRS.2018.8448041
Yongsheng Zhao, D. Hu, Chuang Zhao, Yongjun Zhao, Zhixin Liu
For passive radar target detection, existing studies are based on the ideal assumption that the reference channel is noiseless and the direct-path interference from the illuminator is absentfom the surveillance channel. In this paper, we develop a novel target detector for passive bistatic radar. The proposed detector considers a practically motivated scenario, where the reference channel is contaminated by noise and the surveillance channel is polluted by a direct-path interference that is usually neglected by prior studies. It resorts to the generalized likelihoodratio test (GLRT), which is equivalent to replacing all the unknown parameters with their maximum likelihood estimates (MLEs). Moreover, simulation results demonstrate that the proposed detector achieves better performance when direct-path interference exists in the surveillance channel.
{"title":"Target Detection for Passive Bistatic Radar With Direct-Path Interference","authors":"Yongsheng Zhao, D. Hu, Chuang Zhao, Yongjun Zhao, Zhixin Liu","doi":"10.23919/IRS.2018.8448041","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448041","url":null,"abstract":"For passive radar target detection, existing studies are based on the ideal assumption that the reference channel is noiseless and the direct-path interference from the illuminator is absentfom the surveillance channel. In this paper, we develop a novel target detector for passive bistatic radar. The proposed detector considers a practically motivated scenario, where the reference channel is contaminated by noise and the surveillance channel is polluted by a direct-path interference that is usually neglected by prior studies. It resorts to the generalized likelihoodratio test (GLRT), which is equivalent to replacing all the unknown parameters with their maximum likelihood estimates (MLEs). Moreover, simulation results demonstrate that the proposed detector achieves better performance when direct-path interference exists in the surveillance channel.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126375481","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 : 2018-06-01DOI: 10.23919/IRS.2018.8448186
Jae‐Won Rim, I. Koh
An active decoy is the one of the efficient electronic countermeasures device to deceive RF seeker system approaching toward an airborne platform. On various engagement scenarios, analyzing the jamming effect of the active decoy is important to determine the platform survivability. In this paper, we model the active decoy, airborne platform, and RF seeker considering their dynamics, RF specifications, monostatic radar cross section database, Radar model, etc. On several numerical simulations, the miss distance is evaluated to analyze the jamming effect of the decoy against the RF seeker.
{"title":"Effect of Beam Pattern and Amplifier Gain of Repeater-type Active Decoy on Jamming to Active RF Seeker System based on Proportional Navigation Law","authors":"Jae‐Won Rim, I. Koh","doi":"10.23919/IRS.2018.8448186","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448186","url":null,"abstract":"An active decoy is the one of the efficient electronic countermeasures device to deceive RF seeker system approaching toward an airborne platform. On various engagement scenarios, analyzing the jamming effect of the active decoy is important to determine the platform survivability. In this paper, we model the active decoy, airborne platform, and RF seeker considering their dynamics, RF specifications, monostatic radar cross section database, Radar model, etc. On several numerical simulations, the miss distance is evaluated to analyze the jamming effect of the decoy against the RF seeker.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127240173","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 : 2018-06-01DOI: 10.23919/IRS.2018.8448133
Jan Žák, Ladislav Gregor, F. Dvořáček, V. Papež
In the opening part, the article describes the topic of passive radar jamming and the possibilities of using dipole reflectors (Chaff) to provide radar camouflage. The article further describes the design of an experiment used to determine the values of radar cross-section (RCS) for several Chaff samples. The conclusion shows the practical implementation of the experiment, assesses the RCS values and comments on the results.
{"title":"Measurement of CHAFF RCS","authors":"Jan Žák, Ladislav Gregor, F. Dvořáček, V. Papež","doi":"10.23919/IRS.2018.8448133","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448133","url":null,"abstract":"In the opening part, the article describes the topic of passive radar jamming and the possibilities of using dipole reflectors (Chaff) to provide radar camouflage. The article further describes the design of an experiment used to determine the values of radar cross-section (RCS) for several Chaff samples. The conclusion shows the practical implementation of the experiment, assesses the RCS values and comments on the results.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131688728","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 : 2018-06-01DOI: 10.23919/IRS.2018.8448128
M. Repko, J. Gamec
In our laboratory, we developed a new technique for measurement of the relative permittivity of the wall by the UWB (Ultra-wideband) radar system. The primary use of the radar is the localization of moving objects behind the wall. Developed method will be used in a process of the localization ofpersons for increasing the accuracy of the measurement process. The method was developed for the impulse radar system. This paper describes the behaviour of this method in M-sequence radar system and comparison of results with the impulse radar system.
{"title":"Comparison of Impulse and M-sequence Radar Systems for Estimation of Relative Permittivity","authors":"M. Repko, J. Gamec","doi":"10.23919/IRS.2018.8448128","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448128","url":null,"abstract":"In our laboratory, we developed a new technique for measurement of the relative permittivity of the wall by the UWB (Ultra-wideband) radar system. The primary use of the radar is the localization of moving objects behind the wall. Developed method will be used in a process of the localization ofpersons for increasing the accuracy of the measurement process. The method was developed for the impulse radar system. This paper describes the behaviour of this method in M-sequence radar system and comparison of results with the impulse radar system.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134484749","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 : 2018-06-01DOI: 10.23919/IRS.2018.8448131
D. Calabrese, S. Federici, A. Perrera, D. Rizzato
In this paper the DI2S technique is presented in both Improved Resolution and Multi-Swath implementations. The main advantages of DI2S technique are presented, and a description of the effects on the main SAR image quality parameters is reported as well. The performance of a C-Band SAR System using DI2S Improved Resolution and Multi-Swath are shown with some numerical results. It is described how it is possible to increase the azimuth resolution of long strips or to increase the overall swath acquired by the system.
{"title":"DI2S Technique for a C-Band SAR System","authors":"D. Calabrese, S. Federici, A. Perrera, D. Rizzato","doi":"10.23919/IRS.2018.8448131","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448131","url":null,"abstract":"In this paper the DI2S technique is presented in both Improved Resolution and Multi-Swath implementations. The main advantages of DI2S technique are presented, and a description of the effects on the main SAR image quality parameters is reported as well. The performance of a C-Band SAR System using DI2S Improved Resolution and Multi-Swath are shown with some numerical results. It is described how it is possible to increase the azimuth resolution of long strips or to increase the overall swath acquired by the system.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116442677","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 : 2018-06-01DOI: 10.23919/IRS.2018.8448273
Ludger Prunte
Detection of moving targets using $M_{P} approx 100$ pulses from an airborne radar with multiple receive channels is a crucial point of Earth surveillance. Compressed sensing (CS) has been proven to be applicable to this problem in several publications. Nevertheless, the position of scatterers and the computational grid points for CS differ in general regardless of the scatterers’ motion. Hence, we introduce in this paper a method for moving target detection using off-grid CS by reconstructing angle-Doppler diagrams.
{"title":"Detection of Moving Targets Using Off-Grid Compressed Sensing","authors":"Ludger Prunte","doi":"10.23919/IRS.2018.8448273","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448273","url":null,"abstract":"Detection of moving targets using $M_{P} approx 100$ pulses from an airborne radar with multiple receive channels is a crucial point of Earth surveillance. Compressed sensing (CS) has been proven to be applicable to this problem in several publications. Nevertheless, the position of scatterers and the computational grid points for CS differ in general regardless of the scatterers’ motion. Hence, we introduce in this paper a method for moving target detection using off-grid CS by reconstructing angle-Doppler diagrams.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116042905","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 : 2018-06-01DOI: 10.23919/IRS.2018.8448031
Mariana G. Pralon, Leandro Pralon, B. Pompeo, G. Beltrão, T. Pasetto, R. Thomä
In this paper, we investigate the effects of mutual coupling in phased array radars, and compare two techniques that ensure mitigation of the degrading effects that arise when the active elements are placed close together in the array. In this work, we aim compact arrays with inter-element spacing of less than half of the free-space wavelength. Since the phased array operates both in the transmitting, as well as in the receiving mode, it becomes necessary to analyze how the electromagnetic coupling affects the radiation pattern of the antenna elements for different scanning angles. The mismatch at each antenna port, as well as the distortion of the array radiation pattern will vary depending on how we feed the elements in the array. To overcome the effects of mutual coupling, we compare two techniques for decoupling: the use of metallic walls, and the use of decoupling and matching networks comprised of microstrip lines.
{"title":"Decoupling Evaluation of Compact Phased Array Radars","authors":"Mariana G. Pralon, Leandro Pralon, B. Pompeo, G. Beltrão, T. Pasetto, R. Thomä","doi":"10.23919/IRS.2018.8448031","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448031","url":null,"abstract":"In this paper, we investigate the effects of mutual coupling in phased array radars, and compare two techniques that ensure mitigation of the degrading effects that arise when the active elements are placed close together in the array. In this work, we aim compact arrays with inter-element spacing of less than half of the free-space wavelength. Since the phased array operates both in the transmitting, as well as in the receiving mode, it becomes necessary to analyze how the electromagnetic coupling affects the radiation pattern of the antenna elements for different scanning angles. The mismatch at each antenna port, as well as the distortion of the array radiation pattern will vary depending on how we feed the elements in the array. To overcome the effects of mutual coupling, we compare two techniques for decoupling: the use of metallic walls, and the use of decoupling and matching networks comprised of microstrip lines.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124354418","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 : 2018-06-01DOI: 10.23919/IRS.2018.8448261
D. Ivković, M. Andric, B. Zrnic, Anđelko Cajković, Lidija Mitrović
In this paper is presented the practical realization of functional model of software radar receiver on the PXI platform. All blocks after IQ demodulator and ending with display are programmed in MATLAB® software, then projected in Lab VIEW and at the end implemented on the PXI platform. Realization of the processing of radar signals in real time is presented. Comparative analysis of the results of target detection of one real radar device and realized functional model on the appropriate hardware components is shown.
{"title":"Realization of the Functional Model of the Software Radar Receiver","authors":"D. Ivković, M. Andric, B. Zrnic, Anđelko Cajković, Lidija Mitrović","doi":"10.23919/IRS.2018.8448261","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448261","url":null,"abstract":"In this paper is presented the practical realization of functional model of software radar receiver on the PXI platform. All blocks after IQ demodulator and ending with display are programmed in MATLAB® software, then projected in Lab VIEW and at the end implemented on the PXI platform. Realization of the processing of radar signals in real time is presented. Comparative analysis of the results of target detection of one real radar device and realized functional model on the appropriate hardware components is shown.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115025522","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 : 2018-06-01DOI: 10.23919/IRS.2018.8448021
F. Barbaresco
For classification of Radar micro-Doppler signature by Machine Learning techniques, first step consists in coding the data in well adapted metric space. We propose a new approach to code the time series of I&Q raw data by a Matrix Autoregressive model from a sequence of covariance Toeplitz Hermitian Positive matrices, estimated on a sliding window. We use matrix extension of Trench-Verblunsky theorem proving that a Toeplitz-Block-Toeplitz matrix is parameterized by Matrix Verblunsky coefficients lying in Siegel Unit Poly-Disk, to introduce a Fisher metric space from Information Geometry for this canonical parameterization. We present the coding procedure of micro-Doppler signal in Siegel space and conclude with examples of Machine Learning based on Mean-Shift algorithm in this metric space.
{"title":"Radar Micro-Doppler Signal Encoding in Siegel Unit Poly-Disk for Machine Learning in Fisher Metric Space","authors":"F. Barbaresco","doi":"10.23919/IRS.2018.8448021","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448021","url":null,"abstract":"For classification of Radar micro-Doppler signature by Machine Learning techniques, first step consists in coding the data in well adapted metric space. We propose a new approach to code the time series of I&Q raw data by a Matrix Autoregressive model from a sequence of covariance Toeplitz Hermitian Positive matrices, estimated on a sliding window. We use matrix extension of Trench-Verblunsky theorem proving that a Toeplitz-Block-Toeplitz matrix is parameterized by Matrix Verblunsky coefficients lying in Siegel Unit Poly-Disk, to introduce a Fisher metric space from Information Geometry for this canonical parameterization. We present the coding procedure of micro-Doppler signal in Siegel space and conclude with examples of Machine Learning based on Mean-Shift algorithm in this metric space.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121022659","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 : 2018-06-01DOI: 10.23919/IRS.2018.8448066
M. Pecovský, P. Galajda, S. Slovák, M. Sokol
This paper introduces a novel method for impedance measurement using the M-sequence UWB radar based on simultaneous measurement of voltage and current at the device under test terminals. The main advantage of the proposed technique is using the M-sequence radar device itself, therefore overcoming the need of special hardware in applications where impedance has to be measured during the radar operation, e.g., monitoring of antenna impedance in short-range sensing devices like ground-penetrating radars. Front-end circuits designed for this purpose were built from commercially available discrete components for operation in frequency range from 2 MHz to 300 MHz. The concept is proven by several measurements of resistors, capacitors and inductors. Although the measurement results do not show high accuracy, the repeatability of experiments is confirmed. With sophisticated data processing and advanced hardware design, the proposed RF-IV impedance measurement method by an M-sequence UWB radar may be exploited across a wide frequency range and find vast range of applications in UWB sensing, or become an alternative for directional couplers with the possibility of on-chip realization.
{"title":"RF-IV Impedance Measurement Method by an M-sequence UWB Radar","authors":"M. Pecovský, P. Galajda, S. Slovák, M. Sokol","doi":"10.23919/IRS.2018.8448066","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448066","url":null,"abstract":"This paper introduces a novel method for impedance measurement using the M-sequence UWB radar based on simultaneous measurement of voltage and current at the device under test terminals. The main advantage of the proposed technique is using the M-sequence radar device itself, therefore overcoming the need of special hardware in applications where impedance has to be measured during the radar operation, e.g., monitoring of antenna impedance in short-range sensing devices like ground-penetrating radars. Front-end circuits designed for this purpose were built from commercially available discrete components for operation in frequency range from 2 MHz to 300 MHz. The concept is proven by several measurements of resistors, capacitors and inductors. Although the measurement results do not show high accuracy, the repeatability of experiments is confirmed. With sophisticated data processing and advanced hardware design, the proposed RF-IV impedance measurement method by an M-sequence UWB radar may be exploited across a wide frequency range and find vast range of applications in UWB sensing, or become an alternative for directional couplers with the possibility of on-chip realization.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121676784","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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