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.2018.8448261
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.2018.8448240
M. Hägelen, R. Jetten, R. Kulke, C. Ben, Moritz Krüger
This paper presents a Monopulse radar at 24 GHz which was designed to detect obstacles during autonomous flights of an unmanned aircraft system executing sea rescue operations. The radar consists of one transmit and four receive antennas, which are placed in a square formation close to the transmit antenna. By evaluating the time-ofarrival parameter from the pair of two vertically displaced antennas the calculation of the elevation angle becomes possible in addition to the azimuth angle, which is determined by the pair of two horizontally separated antennas. Thus, the received radar signals can be used for detection and tracking of targets in 3D space. A specific constant false alarm rate (CFAR) was implemented which applies an appropriate threshold that maximizes the probability of detections and keeps the probability of false alarm below a preset level. First test flights were carried out to validate this radar and target detection.
{"title":"Monopulse Radar for Obstacle Detection and Autonomous Flight for Sea Rescue UAVs","authors":"M. Hägelen, R. Jetten, R. Kulke, C. Ben, Moritz Krüger","doi":"10.23919/IRS.2018.8448240","DOIUrl":"https://doi.org/10.23919/IRS.2018.8448240","url":null,"abstract":"This paper presents a Monopulse radar at 24 GHz which was designed to detect obstacles during autonomous flights of an unmanned aircraft system executing sea rescue operations. The radar consists of one transmit and four receive antennas, which are placed in a square formation close to the transmit antenna. By evaluating the time-ofarrival parameter from the pair of two vertically displaced antennas the calculation of the elevation angle becomes possible in addition to the azimuth angle, which is determined by the pair of two horizontally separated antennas. Thus, the received radar signals can be used for detection and tracking of targets in 3D space. A specific constant false alarm rate (CFAR) was implemented which applies an appropriate threshold that maximizes the probability of detections and keeps the probability of false alarm below a preset level. First test flights were carried out to validate this radar and target detection.","PeriodicalId":436201,"journal":{"name":"2018 19th International Radar Symposium (IRS)","volume":"28 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114115369","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.2018.8448131
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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：