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.1990.201115
J. Lemieux, F. Ingels
A novel method for generation of radar waveforms having both frequency shift keying (FSK) and phase shift keying (PSK) interior coding is considered. When PSK modulation is used in a pulse compression radar the radar bandwidth can be increased without increasing peak power. The range resolution is directly proportional to the coded pulsewidth. To achieve resolution in both range and velocity, the thumbtack property of the radar ambiguity function must be preserved. It is shown that by combining FSK and PSK modulation using Costas arrays and Welti codes a significant reduction in sidelobe values will occur. In addition, inherent combined spread spectrum characteristics yield a waveform with excellent ECCM properties.<>
{"title":"Analysis of FSK/PSK modulated radar signals using Costas arrays and complementary Welti codes","authors":"J. Lemieux, F. Ingels","doi":"10.1109/RADAR.1990.201115","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201115","url":null,"abstract":"A novel method for generation of radar waveforms having both frequency shift keying (FSK) and phase shift keying (PSK) interior coding is considered. When PSK modulation is used in a pulse compression radar the radar bandwidth can be increased without increasing peak power. The range resolution is directly proportional to the coded pulsewidth. To achieve resolution in both range and velocity, the thumbtack property of the radar ambiguity function must be preserved. It is shown that by combining FSK and PSK modulation using Costas arrays and Welti codes a significant reduction in sidelobe values will occur. In addition, inherent combined spread spectrum characteristics yield a waveform with excellent ECCM properties.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"67 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":"115748178","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.1990.201154
G. Painchaud, James A Mckenzie, M. Blanchette, A. Voy
An experimental adaptive digital pulse compression (ADPC) subsystem is described. This unit implements a complex correlation between a stored replica of the transmitted waveform and the signals received by the radar. Key to the adaptability of this unit is the use of high-speed VLSI digital ICs which permit bandwidths of up to 10 MHz, along with its ability to use a different waveform or pulse code on each transmission. The ADPC system has been evaluated using both polyphase and binary phase codes in the presence of thermal noise and interference from other waveforms which are not matched to the current transmission.<>
{"title":"An experimental adaptive digital pulse compression subsystem for multi-function radar applications","authors":"G. Painchaud, James A Mckenzie, M. Blanchette, A. Voy","doi":"10.1109/RADAR.1990.201154","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201154","url":null,"abstract":"An experimental adaptive digital pulse compression (ADPC) subsystem is described. This unit implements a complex correlation between a stored replica of the transmitted waveform and the signals received by the radar. Key to the adaptability of this unit is the use of high-speed VLSI digital ICs which permit bandwidths of up to 10 MHz, along with its ability to use a different waveform or pulse code on each transmission. The ADPC system has been evaluated using both polyphase and binary phase codes in the presence of thermal noise and interference from other waveforms which are not matched to the current transmission.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"44 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":"125191609","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.1990.201097
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.1990.201143
K. Molnar, W. Lin, M. O’Donnell
A combined array beamforming and channel equalization technique for mitigating the effect of external interferences and signal phase aberrations associated with an HF radar is presented. The aberration correction scheme is a nonmodel-based technique which makes use of the statistical randomness in the clutter region. It is capable of correcting phase distortions due to frequency dispersion incurred in the ionospheric propagation paths. Simulation shows that with this technique the phase distorted signal can be restored to within 1 dB loss of the undistorted signal. In order to retain the possibility of correcting phase aberration at the array element level, a two-step beamforming technique has been implemented by providing a spatial filter to exclude the strong RFI and jammers at the element level and by applying conventional beamforming on the receiver residue which contains only clutter return and local noise. The phase aberration technique is applied between the two steps after the major interferers are canceled.<>
{"title":"Beamforming and aberration correction in HF radar","authors":"K. Molnar, W. Lin, M. O’Donnell","doi":"10.1109/RADAR.1990.201143","DOIUrl":"https://doi.org/10.1109/RADAR.1990.201143","url":null,"abstract":"A combined array beamforming and channel equalization technique for mitigating the effect of external interferences and signal phase aberrations associated with an HF radar is presented. The aberration correction scheme is a nonmodel-based technique which makes use of the statistical randomness in the clutter region. It is capable of correcting phase distortions due to frequency dispersion incurred in the ionospheric propagation paths. Simulation shows that with this technique the phase distorted signal can be restored to within 1 dB loss of the undistorted signal. In order to retain the possibility of correcting phase aberration at the array element level, a two-step beamforming technique has been implemented by providing a spatial filter to exclude the strong RFI and jammers at the element level and by applying conventional beamforming on the receiver residue which contains only clutter return and local noise. The phase aberration technique is applied between the two steps after the major interferers are canceled.<<ETX>>","PeriodicalId":441674,"journal":{"name":"IEEE International Conference on Radar","volume":"29 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":"121688738","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.1990.201096
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.1990.201168
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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