A multiple automatic test system of microwave radar performance is presented. The composition of the test system is introduced, the testing principle and its characteristic is discussed in detail. This new test system can be used to test the microwave radar power, receiver sensitivity or noise, antenna radiation patterns, angle-tracking performance, range performance and the radar's zero range correction.
{"title":"A multiple automatic test system of microwave radar performance","authors":"Chen Shenjian, Hu Yunhua, Wang Zhiyun","doi":"10.1109/ICR.1996.574527","DOIUrl":"https://doi.org/10.1109/ICR.1996.574527","url":null,"abstract":"A multiple automatic test system of microwave radar performance is presented. The composition of the test system is introduced, the testing principle and its characteristic is discussed in detail. This new test system can be used to test the microwave radar power, receiver sensitivity or noise, antenna radiation patterns, angle-tracking performance, range performance and the radar's zero range correction.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125180036","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}
The new method is called single-channel electroscan quasi-monopulse direction finding (DF) technique. It adopts the electroscan to control the commutation of the directional beams to obtain the directional pulse amplitude (PA) information. The PA/sub 0/ from an omni-directional channel is taken as a reference. The process of the PA difference among the directional beams is based on constant difference PA principle. By consulting the RF-/spl Delta/PA-DOA (direction of arrival) table in the memory, the direction of radar signal is obtained. The advantages of the method are synthesized from multi-beam, PA comparison and electroscan DF techniques. Thus the system configuration is optimized, the cost is reduced and the performance is enhanced.
{"title":"A new method to find the direction of radar signal","authors":"Li Jinrui, Fan Gouping, Mei Qing","doi":"10.1109/ICR.1996.574547","DOIUrl":"https://doi.org/10.1109/ICR.1996.574547","url":null,"abstract":"The new method is called single-channel electroscan quasi-monopulse direction finding (DF) technique. It adopts the electroscan to control the commutation of the directional beams to obtain the directional pulse amplitude (PA) information. The PA/sub 0/ from an omni-directional channel is taken as a reference. The process of the PA difference among the directional beams is based on constant difference PA principle. By consulting the RF-/spl Delta/PA-DOA (direction of arrival) table in the memory, the direction of radar signal is obtained. The advantages of the method are synthesized from multi-beam, PA comparison and electroscan DF techniques. Thus the system configuration is optimized, the cost is reduced and the performance is enhanced.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127830977","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}
The paper deals with the performances of the first and second order rank detectors in presence of correlated K-distributed clutter. First, assuming a perfect knowledge of both clutter shape factor and texture correlation, the detection probability of the rankers is compared to the ideal performance and to that of a cell-averaging detector. Then, an on-line estimator of the shape factor in the correlated environment is introduced, and the corresponding detection losses are analyzed.
{"title":"Rank detectors in correlated K-distributed clutter","authors":"T. Bucciarelli, G. Fedele, P. Lombardo, T. Mattei","doi":"10.1109/ICR.1996.573813","DOIUrl":"https://doi.org/10.1109/ICR.1996.573813","url":null,"abstract":"The paper deals with the performances of the first and second order rank detectors in presence of correlated K-distributed clutter. First, assuming a perfect knowledge of both clutter shape factor and texture correlation, the detection probability of the rankers is compared to the ideal performance and to that of a cell-averaging detector. Then, an on-line estimator of the shape factor in the correlated environment is introduced, and the corresponding detection losses are analyzed.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"122 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124526273","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}
Correlation matrix memory is one of the models of the association memory, and can be applied to high range resolution radar target recognition. In this paper, the association memory matrix is used to memorize a great number of encoded profiles belong to different targets. Results show that it is robust to noise and aspect changes.
{"title":"Automatic target recognition based on correlation matrix memory","authors":"J. Wenli, Tang Baiyu, Ke Youan","doi":"10.1109/ICR.1996.573809","DOIUrl":"https://doi.org/10.1109/ICR.1996.573809","url":null,"abstract":"Correlation matrix memory is one of the models of the association memory, and can be applied to high range resolution radar target recognition. In this paper, the association memory matrix is used to memorize a great number of encoded profiles belong to different targets. Results show that it is robust to noise and aspect changes.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132749572","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}
A method of radar target classification and recognition through extracting their fractal features directly from the radar echoes is presented. Firstly, two dimensional texture images with distances and directions as the coordinate axes are formed, then, the FFT-Mellin transformation is applied to eliminate the affect caused by flights' motion, posture and direction. Finally, a fractal texture analysis method is used to extract the features of the planes, which is improved in several points: to estimate the fractal dimensions in different directions, to calculate the fractal dimensions by using divisional fitting methods and to use the fractal signatures as the feature vectors. The results show that our method performs well in radar target recognition.
{"title":"A fractal approach to radar target recognition","authors":"Xie Weixin, Xie Wenlu, Xue Zhong","doi":"10.1109/ICR.1996.573789","DOIUrl":"https://doi.org/10.1109/ICR.1996.573789","url":null,"abstract":"A method of radar target classification and recognition through extracting their fractal features directly from the radar echoes is presented. Firstly, two dimensional texture images with distances and directions as the coordinate axes are formed, then, the FFT-Mellin transformation is applied to eliminate the affect caused by flights' motion, posture and direction. Finally, a fractal texture analysis method is used to extract the features of the planes, which is improved in several points: to estimate the fractal dimensions in different directions, to calculate the fractal dimensions by using divisional fitting methods and to use the fractal signatures as the feature vectors. The results show that our method performs well in radar target recognition.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132940392","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}
A. Farina, F. Gini, M. Greco, F. Lombardini, P. Lombardo, K.J. Sangston, L. Verrazzani
An overview on a number of new theoretical findings is presented for the optimum and suboptimum radar detection of fluctuating targets against a composite disturbance, which is modeled as a mixture of coherent K-distributed and Gaussian distributed disturbance. The optimum coherent detector, which derives from the likelihood ratio test, is used as the performance bound. Starting from some of its possible different analytical formulations, the optimum detector is approximated to give a family of suboptimum detectors, with performance close to optimal. The adaptive implementation of these detectors is discussed and the adaptivity loss is evaluated. The detection schemes are then fed with recorded live clutter data, and their performance are analyzed in such environment. The validity of the theoretical analysis is thus assessed as well as the practicality of the suboptimum detection schemes presented.
{"title":"Radar detection of targets: new theoretical findings and results by processing recorded live data","authors":"A. Farina, F. Gini, M. Greco, F. Lombardini, P. Lombardo, K.J. Sangston, L. Verrazzani","doi":"10.1109/ICR.1996.573761","DOIUrl":"https://doi.org/10.1109/ICR.1996.573761","url":null,"abstract":"An overview on a number of new theoretical findings is presented for the optimum and suboptimum radar detection of fluctuating targets against a composite disturbance, which is modeled as a mixture of coherent K-distributed and Gaussian distributed disturbance. The optimum coherent detector, which derives from the likelihood ratio test, is used as the performance bound. Starting from some of its possible different analytical formulations, the optimum detector is approximated to give a family of suboptimum detectors, with performance close to optimal. The adaptive implementation of these detectors is discussed and the adaptivity loss is evaluated. The detection schemes are then fed with recorded live clutter data, and their performance are analyzed in such environment. The validity of the theoretical analysis is thus assessed as well as the practicality of the suboptimum detection schemes presented.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114752028","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}
A lately developed and designed S-band 2D shipborne radar with full coherence for air and surface targets is introduced. Advanced techniques in modern radar such as the amplification chain transmitter, the chirp compression, the MTD signal processor and the interpulse frequency agility etc. are employed and the full coherence of the radar signal is realized. Seagull radar has high performance, perfect functions, relatively high reliability and maintainability, and therefore meets the needs of large and medium scale surface warships.
{"title":"A new Seagull shipborne search radar","authors":"Meng Xianfu, Shao You-mei, Shi Zhaochang","doi":"10.1109/ICR.1996.573821","DOIUrl":"https://doi.org/10.1109/ICR.1996.573821","url":null,"abstract":"A lately developed and designed S-band 2D shipborne radar with full coherence for air and surface targets is introduced. Advanced techniques in modern radar such as the amplification chain transmitter, the chirp compression, the MTD signal processor and the interpulse frequency agility etc. are employed and the full coherence of the radar signal is realized. Seagull radar has high performance, perfect functions, relatively high reliability and maintainability, and therefore meets the needs of large and medium scale surface warships.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115089155","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}
Uncompensated phase errors presented in synthetic aperture radar (SAR) signals can have a disastrous effect on reconstructed image quality. We present a new method by which arbitrary phase errors can be corrected. The proposed technique is based on a continuous wavelet transform (CWT) analysis of the SAR signal. An approximate explicit expression for CWT is derived under the condition of the radar signal and the mother wavelet being constricted in asymptotic forms. It is demonstrated that the frequency modulation information, which can be used for refocusing the SAR image, can be obtained from the arguments or the moduli of the wavelet coefficients. Finally some simulation results are presented in order to validate the proposed technique.
{"title":"A new synthetic aperture radar autofocusing approach","authors":"Bai Ping, Chen Zongzhi","doi":"10.1109/ICR.1996.574453","DOIUrl":"https://doi.org/10.1109/ICR.1996.574453","url":null,"abstract":"Uncompensated phase errors presented in synthetic aperture radar (SAR) signals can have a disastrous effect on reconstructed image quality. We present a new method by which arbitrary phase errors can be corrected. The proposed technique is based on a continuous wavelet transform (CWT) analysis of the SAR signal. An approximate explicit expression for CWT is derived under the condition of the radar signal and the mother wavelet being constricted in asymptotic forms. It is demonstrated that the frequency modulation information, which can be used for refocusing the SAR image, can be obtained from the arguments or the moduli of the wavelet coefficients. Finally some simulation results are presented in order to validate the proposed technique.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115136999","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}
The high range resolution performance of frequency stepped radar signal under the influence of thermal noise, target fluctuation, frequency jitter and target motion is analysed; the minimum target velocity unit needed to be compensated is calculated.
{"title":"High range resolution performance of frequency stepped radar signal","authors":"L. Teng, M. Erke, Han Yueqiu","doi":"10.1109/ICR.1996.573817","DOIUrl":"https://doi.org/10.1109/ICR.1996.573817","url":null,"abstract":"The high range resolution performance of frequency stepped radar signal under the influence of thermal noise, target fluctuation, frequency jitter and target motion is analysed; the minimum target velocity unit needed to be compensated is calculated.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116130983","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}
The paper deals with the optimum detection of slowly moving targets with multichannel SAR in the presence of internal clutter motion. A double exponential model for the clutter covariance allows both interpretation of the optimum detector and closed form performance analysis to be derived.
{"title":"Optimum multichannel SAR detection of slowly moving targets in the presence of internal clutter motion","authors":"P. Lombardo","doi":"10.1109/ICR.1996.574452","DOIUrl":"https://doi.org/10.1109/ICR.1996.574452","url":null,"abstract":"The paper deals with the optimum detection of slowly moving targets with multichannel SAR in the presence of internal clutter motion. A double exponential model for the clutter covariance allows both interpretation of the optimum detector and closed form performance analysis to be derived.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"56 86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116580611","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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