Pub Date : 1990-05-07DOI: 10.1109/RADAR.1990.201136
H. Klausing, H. Kaltschmidt
ROSAR (rotor-SAR) is a synthetic aperture radar concept for pilot sight target detection and target localization with high resolution. ROSAR is based on illuminating/receiving antennas placed at the tips of helicopter rotor blades. The ROSAR concept has potential benefits for civil and military helicopter-borne imaging applications. The concept has two main potential benefits: the imaging field of view is 360 degrees , and there is no need for a forward velocity of the carrier platform. As opposed to SAR systems based on linear movement of the antenna, ROSAR imaging is based on synthetic apertures of a circular shape. Thus, the image formation process requires a polar format processing architecture.<>
{"title":"Feasibility of a synthetic aperture radar with rotating antennas (ROSAR)","authors":"H. Klausing, H. Kaltschmidt","doi":"10.1109/RADAR.1990.201136","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201136","url":null,"abstract":"ROSAR (rotor-SAR) is a synthetic aperture radar concept for pilot sight target detection and target localization with high resolution. ROSAR is based on illuminating/receiving antennas placed at the tips of helicopter rotor blades. The ROSAR concept has potential benefits for civil and military helicopter-borne imaging applications. The concept has two main potential benefits: the imaging field of view is 360 degrees , and there is no need for a forward velocity of the carrier platform. As opposed to SAR systems based on linear movement of the antenna, ROSAR imaging is based on synthetic apertures of a circular shape. Thus, the image formation process requires a polar format processing architecture.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121808882","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 : 1990-05-07DOI: 10.1109/RADAR.1990.201172
H. Rohling
A mismatched filter design is introduced for periodic sequences where the receiver filter coefficients are optimized with the property that all sidelobes of the output signal are (identical) zero. Some results, especially for binary sequences are given, and it is shown that for each code length N>2 there exists at least one sequence (and a corresponding mismatched filter) that has a periodic of aperiodic autocorrelation function with an impulselike form with a low sidelobe level.<>
{"title":"Mismatched filter design for pulse compression","authors":"H. Rohling","doi":"10.1109/RADAR.1990.201172","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201172","url":null,"abstract":"A mismatched filter design is introduced for periodic sequences where the receiver filter coefficients are optimized with the property that all sidelobes of the output signal are (identical) zero. Some results, especially for binary sequences are given, and it is shown that for each code length N>2 there exists at least one sequence (and a corresponding mismatched filter) that has a periodic of aperiodic autocorrelation function with an impulselike form with a low sidelobe level.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125910264","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 : 1990-05-07DOI: 10.1109/RADAR.1990.201131
B. As, E. Tilfors
The rationale and trade-off considerations involved in the definition of a new generation of high-performance tracking radar are described. The radar is the primary sensor for control of surface-to-air missiles, anti-aircraft or dual-purpose guns, and close-in weapons and is designed for all sizes of ships from 150 tons up. Operational requirements are outlined broadly and optimization investigations accounted for on a number of parameters: wavelengths, type of transmitter and waveforms, pulse compression principle, receiver and signal processing, and antenna. Data for the completed standard design are given.<>
{"title":"Selection of parameters in the design of a naval fire control radar","authors":"B. As, E. Tilfors","doi":"10.1109/RADAR.1990.201131","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201131","url":null,"abstract":"The rationale and trade-off considerations involved in the definition of a new generation of high-performance tracking radar are described. The radar is the primary sensor for control of surface-to-air missiles, anti-aircraft or dual-purpose guns, and close-in weapons and is designed for all sizes of ships from 150 tons up. Operational requirements are outlined broadly and optimization investigations accounted for on a number of parameters: wavelengths, type of transmitter and waveforms, pulse compression principle, receiver and signal processing, and antenna. Data for the completed standard design are given.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126821128","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 : 1990-05-07DOI: 10.1109/RADAR.1990.201097
E. Sviestins
A typical C/sup 3/ system for air defence requires a clear and unambiguous air picture for efficient management of the air defence resources. Often a number of surveillance radars provide the main input data. Some kind of multi-radar tracking is then desirable for integrating the radar data to form the air picture. A number of different multi-radar tracking principles are in use. A number of important problems have to be addressed when designing a multi-radar tracking system. Bias errors, slant range errors, processing administration, and automatic track initiation are discussed, and the approach to these problems used in a recently developed commercial system is briefly considered.<>
{"title":"True multi-radar tracking for air defence C/sup 3/ systems","authors":"E. Sviestins","doi":"10.1109/RADAR.1990.201097","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201097","url":null,"abstract":"A typical C/sup 3/ system for air defence requires a clear and unambiguous air picture for efficient management of the air defence resources. Often a number of surveillance radars provide the main input data. Some kind of multi-radar tracking is then desirable for integrating the radar data to form the air picture. A number of different multi-radar tracking principles are in use. A number of important problems have to be addressed when designing a multi-radar tracking system. Bias errors, slant range errors, processing administration, and automatic track initiation are discussed, and the approach to these problems used in a recently developed commercial system is briefly considered.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129927885","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 : 1990-05-07DOI: 10.1109/RADAR.1990.201135
S. Barbarossa, A. Farina
A novel scheme for detecting moving targets with synthetic aperture radar (SAR) is presented. The proposed approach is based on the use of the Wigner-Ville distribution (WVD) for simultaneously detecting moving targets and estimating their motion kinematic parameters. The estimation plays a key role for focusing the target and correctly locating it with respect to the stationary background. The method has a number of advantages: the detection is efficiently performed on the samples in the time-frequency domain, provided the WVD, without resorting to the use of a bank of filters, each one matched to possible values of the unknown target motion parameters; and the estimation of the target motion parameters can be done on the same time-frequency domain by locating the line where the maximum energy of the WVD is concentrated. A validation of the approach is given by both analytical and simulation means. In addition, the estimation of the target kinematic parameters and the corresponding image focusing are also demonstrated.<>
{"title":"A novel procedure for detecting and focusing moving objects with SAR based on the Wigner-Ville distribution","authors":"S. Barbarossa, A. Farina","doi":"10.1109/RADAR.1990.201135","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201135","url":null,"abstract":"A novel scheme for detecting moving targets with synthetic aperture radar (SAR) is presented. The proposed approach is based on the use of the Wigner-Ville distribution (WVD) for simultaneously detecting moving targets and estimating their motion kinematic parameters. The estimation plays a key role for focusing the target and correctly locating it with respect to the stationary background. The method has a number of advantages: the detection is efficiently performed on the samples in the time-frequency domain, provided the WVD, without resorting to the use of a bank of filters, each one matched to possible values of the unknown target motion parameters; and the estimation of the target motion parameters can be done on the same time-frequency domain by locating the line where the maximum energy of the WVD is concentrated. A validation of the approach is given by both analytical and simulation means. In addition, the estimation of the target kinematic parameters and the corresponding image focusing are also demonstrated.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130017947","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 : 1990-05-07DOI: 10.1109/RADAR.1990.201096
S. D. Himonas, M. Barkat
A distributed constant false alarm rate (CFAR) detector with data fusion when a clutter power transition and partially correlated Rayleigh targets are present in the range resolution cells is discussed. It is shown that by appropriately selecting the fusion rule at the data fusion center, the detection performance may be less sensitive to the degree of correlation among the received pulses. Analytical expressions for the overall probability of detection and the overall probability of false alarm for a general target correlation model and any M-out-of-L fusion rule are derived.<>
{"title":"A distributed CFAR processor with data fusion for correlated targets in homogeneous clutter","authors":"S. D. Himonas, M. Barkat","doi":"10.1109/RADAR.1990.201096","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201096","url":null,"abstract":"A distributed constant false alarm rate (CFAR) detector with data fusion when a clutter power transition and partially correlated Rayleigh targets are present in the range resolution cells is discussed. It is shown that by appropriately selecting the fusion rule at the data fusion center, the detection performance may be less sensitive to the degree of correlation among the received pulses. Analytical expressions for the overall probability of detection and the overall probability of false alarm for a general target correlation model and any M-out-of-L fusion rule are derived.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132953563","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 : 1990-05-07DOI: 10.1109/RADAR.1990.201193
W. Klembowski
Good weather angels are echoes detected by a radar when in the searched volume of air space no real objects exist. Experimental work is presented to show how the polarization state affects the intensity of good weather angels. Experimental data have been collected from the L-band long-range Polish primary surveillance radars (PSRs) (AVIA C) by registration of plots from the extractor and by taking pictures from the PPI presentation. The best results in decreasing the intensity of angels were obtained when using circular or near-circular polarization. It is concluded from the experimental data that fixed circular polarization can be used in PSRs as the best way to minimize received weather clutter and angels.<>
{"title":"Experimental study of polarization influence on angles intensity","authors":"W. Klembowski","doi":"10.1109/RADAR.1990.201193","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201193","url":null,"abstract":"Good weather angels are echoes detected by a radar when in the searched volume of air space no real objects exist. Experimental work is presented to show how the polarization state affects the intensity of good weather angels. Experimental data have been collected from the L-band long-range Polish primary surveillance radars (PSRs) (AVIA C) by registration of plots from the extractor and by taking pictures from the PPI presentation. The best results in decreasing the intensity of angels were obtained when using circular or near-circular polarization. It is concluded from the experimental data that fixed circular polarization can be used in PSRs as the best way to minimize received weather clutter and angels.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130578908","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 : 1990-05-07DOI: 10.1109/RADAR.1990.201134
J. Locke, K. Olds, T. Ohe
The rendezvous radar set (RRS) under development will be a key subsystem aboard NASA's new orbital maneuvering vehicle (OMV). The RRS is an X-band all solid-state, monopulse tracking, frequency-hopping, pulse-Doppler radar system. Targets of 1 m/sup 2/ are detected at ranges greater than 4.5 nautical miles, and larger targets are detected at up to 10 nautical miles. The target is then tracked in angle, range, and range rate to a distance of 35 feet from the OMV. In addition to performance and cost, the design drivers for the RRS development have included the minimization of power consumption, size, and weight.<>
{"title":"Rendezvous radar for the orbital maneuvering vehicle","authors":"J. Locke, K. Olds, T. Ohe","doi":"10.1109/RADAR.1990.201134","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201134","url":null,"abstract":"The rendezvous radar set (RRS) under development will be a key subsystem aboard NASA's new orbital maneuvering vehicle (OMV). The RRS is an X-band all solid-state, monopulse tracking, frequency-hopping, pulse-Doppler radar system. Targets of 1 m/sup 2/ are detected at ranges greater than 4.5 nautical miles, and larger targets are detected at up to 10 nautical miles. The target is then tracked in angle, range, and range rate to a distance of 35 feet from the OMV. In addition to performance and cost, the design drivers for the RRS development have included the minimization of power consumption, size, and weight.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132643974","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 : 1990-05-07DOI: 10.1109/RADAR.1990.201168
R. Xu, Zhidao Cao, Yongtan Liu
A detailed consideration of the accuracy requirement for the compensation for the inverse synthetic aperture radar is presented. A new scheme of the motion compensation is submitted, in which the overall target, not any particular target scatter, is tracked to do the motion compensation. Some experimental results are given. The results indicate that this scheme of motion compensation is effective and feasible.<>
{"title":"A new method of motion compensation for ISAR","authors":"R. Xu, Zhidao Cao, Yongtan Liu","doi":"10.1109/RADAR.1990.201168","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201168","url":null,"abstract":"A detailed consideration of the accuracy requirement for the compensation for the inverse synthetic aperture radar is presented. A new scheme of the motion compensation is submitted, in which the overall target, not any particular target scatter, is tracked to do the motion compensation. Some experimental results are given. The results indicate that this scheme of motion compensation is effective and feasible.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133470195","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 : 1990-05-07DOI: 10.1109/RADAR.1990.201108
G. Wanielik, D. Stock
Problems with a polarimetric radar which is able to measure the complete scattering matrix (SM) of a reflecting object are discussed. Emphasis is placed on polarimetric signal processing, in which the multichannel polarimetric target information is used to obtain improved results compared with signal processing of a nonpolarimetric radar. Measured SM data of different targets (rain and ground clutter and a jet, measured at different aspect angles) obtained with the operational DLR polarimetric radar are discussed. The target-dependent differences of the data are given. A polarimetric CFAR (constant false alarm rate) detector which uses the complete information of the SM is described. The probability of detection and the false alarm rate of this new CFAR-detector, which can decide about the presence of a target even in situations when a conventional CFAR-detector fails, are evaluated.<>
{"title":"Measured scattering-matrix-data and a polarimetric CFAR-detector which works on this data","authors":"G. Wanielik, D. Stock","doi":"10.1109/RADAR.1990.201108","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201108","url":null,"abstract":"Problems with a polarimetric radar which is able to measure the complete scattering matrix (SM) of a reflecting object are discussed. Emphasis is placed on polarimetric signal processing, in which the multichannel polarimetric target information is used to obtain improved results compared with signal processing of a nonpolarimetric radar. Measured SM data of different targets (rain and ground clutter and a jet, measured at different aspect angles) obtained with the operational DLR polarimetric radar are discussed. The target-dependent differences of the data are given. A polarimetric CFAR (constant false alarm rate) detector which uses the complete information of the SM is described. The probability of detection and the false alarm rate of this new CFAR-detector, which can decide about the presence of a target even in situations when a conventional CFAR-detector fails, are evaluated.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130956972","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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