This paper introduces the harbour surveillance radar HSR-1128 developed by Nanjing Research Institute of Electronics Technology. The radar has been operating in Tanggu Harbour VTS Center in Tianjin for more than one year. This X-band radar utilizes frequency diversity, polarization diversity and time diversity to significantly suppress sea clutter, rain or snow clutter and radar interference. The system performance and operating principles of this radar are described; the advanced techniques it uses and the operating status are also stated.
{"title":"A new type of harbour surveillance radar with diversity processing","authors":"Yang Hanmin, Wu Mingmin","doi":"10.1109/ICR.1996.574552","DOIUrl":"https://doi.org/10.1109/ICR.1996.574552","url":null,"abstract":"This paper introduces the harbour surveillance radar HSR-1128 developed by Nanjing Research Institute of Electronics Technology. The radar has been operating in Tanggu Harbour VTS Center in Tianjin for more than one year. This X-band radar utilizes frequency diversity, polarization diversity and time diversity to significantly suppress sea clutter, rain or snow clutter and radar interference. The system performance and operating principles of this radar are described; the advanced techniques it uses and the operating status are also stated.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"11 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":"122757209","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 computational complexity of robust adaptive array with quadratic constraints is a critical problem in real time implementation. For coping with this problem, the Chua's (1988) nonlinear programming recurrent neural network is explored, which is used to solve the optimal solution of the robust adaptive array with quadratic constraints. The present approach converges within several times of the circuit time constant, thus particularly suitable to real time applications.
{"title":"A neural implementation of robust broadband adaptive array","authors":"G. Qiang","doi":"10.1109/ICR.1996.574465","DOIUrl":"https://doi.org/10.1109/ICR.1996.574465","url":null,"abstract":"The computational complexity of robust adaptive array with quadratic constraints is a critical problem in real time implementation. For coping with this problem, the Chua's (1988) nonlinear programming recurrent neural network is explored, which is used to solve the optimal solution of the robust adaptive array with quadratic constraints. The present approach converges within several times of the circuit time constant, thus particularly suitable to real time applications.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"6 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":"123975103","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}
This paper describes beam compression or angular resolution enhancement techniques. The target distribution is smoothed by the antenna pattern and smeared echoes are observed. How to recover the true target is an essential problem. Without increasing antenna size, an apparently sharpened radar beam is obtainable by several techniques.
{"title":"Radar beam compressions","authors":"T. Suzuki","doi":"10.1109/ICR.1996.573763","DOIUrl":"https://doi.org/10.1109/ICR.1996.573763","url":null,"abstract":"This paper describes beam compression or angular resolution enhancement techniques. The target distribution is smoothed by the antenna pattern and smeared echoes are observed. How to recover the true target is an essential problem. Without increasing antenna size, an apparently sharpened radar beam is obtainable by several techniques.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"1 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":"129789785","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 type of detection problem of the wideband transients which are often encountered in wideband radar and sonar applications is formulated. On the basis of wavelet theory, the optimal matched detection in the time-scale domain is introduced and several detectors are developed. The mother wavelet applied in the detection is designed by the neural network we developed. The performance of the detectors is analyzed by Monte-Carlo simulation. The numerical results show that the detectors are often effective and robust.
{"title":"Wavelet detectors for wideband radar signals","authors":"Z. Xiaoping, Tian Li-sheng, Peng Ying-ning","doi":"10.1109/ICR.1996.574444","DOIUrl":"https://doi.org/10.1109/ICR.1996.574444","url":null,"abstract":"A type of detection problem of the wideband transients which are often encountered in wideband radar and sonar applications is formulated. On the basis of wavelet theory, the optimal matched detection in the time-scale domain is introduced and several detectors are developed. The mother wavelet applied in the detection is designed by the neural network we developed. The performance of the detectors is analyzed by Monte-Carlo simulation. The numerical results show that the detectors are often effective and robust.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"12 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":"129989936","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}
Some probabilistic data association methods, which have been published in recent years, are equivalent to appropriate networks in the paper. According to the property and the feature of JPDA network structure, a fast, compact and effective data association is presented. The data association performance of the new comparing with other probabilistic data association methods. Making use of the new method and a new adapative Kalman filter presented by Zhu Ziqian (1992), a MTT system is developed and is simulated with several groups typical multitarget motion trajectory in an airborne radar MTT system.
{"title":"Iterated joint probabilistic data association","authors":"Zhu Ziqian","doi":"10.1109/ICR.1996.574488","DOIUrl":"https://doi.org/10.1109/ICR.1996.574488","url":null,"abstract":"Some probabilistic data association methods, which have been published in recent years, are equivalent to appropriate networks in the paper. According to the property and the feature of JPDA network structure, a fast, compact and effective data association is presented. The data association performance of the new comparing with other probabilistic data association methods. Making use of the new method and a new adapative Kalman filter presented by Zhu Ziqian (1992), a MTT system is developed and is simulated with several groups typical multitarget motion trajectory in an airborne radar MTT system.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"40 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":"129441221","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}
In step frequency radar, the frequency of each pulse is increased in steps to achieve large effective bandwidth sequentially instead of instantaneously and thus easing the requirements on the analog to digital converter (ADC) and other hardware. This paper discusses the step frequency radar and its associated signal processing, and it investigates this type of radar with the ambiguity function. The mathematical expression is derived for the ambiguity function of step frequency radar receiver and processor. The processor functions included are range gating, weighting, fill pulses, and inverse discrete Fourier transform (IDFT). Ambiguity diagrams are plotted for step frequency receiver processor and comparison is made with traditional constant frequency radar.
{"title":"The ambiguity function of the step frequency radar signal processor","authors":"G. Gill, Jen-Chih Huang","doi":"10.1109/ICR.1996.574466","DOIUrl":"https://doi.org/10.1109/ICR.1996.574466","url":null,"abstract":"In step frequency radar, the frequency of each pulse is increased in steps to achieve large effective bandwidth sequentially instead of instantaneously and thus easing the requirements on the analog to digital converter (ADC) and other hardware. This paper discusses the step frequency radar and its associated signal processing, and it investigates this type of radar with the ambiguity function. The mathematical expression is derived for the ambiguity function of step frequency radar receiver and processor. The processor functions included are range gating, weighting, fill pulses, and inverse discrete Fourier transform (IDFT). Ambiguity diagrams are plotted for step frequency receiver processor and comparison is made with traditional constant frequency radar.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"1 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":"128869103","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}
This paper presents a signal processing method to remove the velocity vagueness and probability ambiguity of the random binary phase coded pulse signal (RBPC-PS) radar. From all the results analysed and discussed, we can conclude that because of the excellent specific property of the random signal and by adopting a reasonable signal processing scheme, the RBPC-PS radar system possesses a good resolution and accuracy in measuring the distance and the velocity of the target and good jamming immunity, and it can remove the distance and velocity vagueness caused by periods and extend the Doppler tolerance. From the results we can also see that the statistical method of the range sidelobe (RSL) suppression can reduce the RSL by over 30 dB thus avoiding the probability ambiguity, which makes the RBPC-PS radar system practical.
{"title":"The velocity vagueness and probability ambiguity remove of the random binary phase coded pulse signal radar","authors":"Sun Guangmin, Liu Guo-sui, G. Hong, Z. Xiaohua","doi":"10.1109/ICR.1996.574539","DOIUrl":"https://doi.org/10.1109/ICR.1996.574539","url":null,"abstract":"This paper presents a signal processing method to remove the velocity vagueness and probability ambiguity of the random binary phase coded pulse signal (RBPC-PS) radar. From all the results analysed and discussed, we can conclude that because of the excellent specific property of the random signal and by adopting a reasonable signal processing scheme, the RBPC-PS radar system possesses a good resolution and accuracy in measuring the distance and the velocity of the target and good jamming immunity, and it can remove the distance and velocity vagueness caused by periods and extend the Doppler tolerance. From the results we can also see that the statistical method of the range sidelobe (RSL) suppression can reduce the RSL by over 30 dB thus avoiding the probability ambiguity, which makes the RBPC-PS radar system practical.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"132 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":"123813402","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}
An approach to aircraft target classification by conventional radar is presented that uses the engine modulation on radar echoes from the detected target. The echo series are rearranged into a graph and the modulation signatures are extracted by an optical Fourier transform. A semi-connected backpropagation neural network classifier is trained for classification. Experiment results on an air defense surveillance radar show the effectiveness of the proposed method.
{"title":"Target classification by conventional radar","authors":"H. Jianjun, Huang Jingxiong, Xie Weixin","doi":"10.1109/ICR.1996.573807","DOIUrl":"https://doi.org/10.1109/ICR.1996.573807","url":null,"abstract":"An approach to aircraft target classification by conventional radar is presented that uses the engine modulation on radar echoes from the detected target. The echo series are rearranged into a graph and the modulation signatures are extracted by an optical Fourier transform. A semi-connected backpropagation neural network classifier is trained for classification. Experiment results on an air defense surveillance radar show the effectiveness of the proposed method.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"99 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120813357","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}
For pt.I see ibid., p.755, 1996. The considerations on space-time adaptive processing for clutter rejection in air- and spaceborne radar presented in pt.I of this paper are continued. While in part I space-time processing algorithms were presented which are capable of adaptive real-time processing in this paper some consideration on frequency domain processing are made. Two new variants of the well-known space-time processors described in pt.I are presented. All processors presented in the two twin papers are compared in terms of computational complexity which is equivalent to the real-time processing capability. It is shown that frequency domain processing may yield some advantage over space-time processing.
{"title":"Real-time adaptive airborne MTI. II. Space-frequency processing","authors":"R. Klemm","doi":"10.1109/ICR.1996.574487","DOIUrl":"https://doi.org/10.1109/ICR.1996.574487","url":null,"abstract":"For pt.I see ibid., p.755, 1996. The considerations on space-time adaptive processing for clutter rejection in air- and spaceborne radar presented in pt.I of this paper are continued. While in part I space-time processing algorithms were presented which are capable of adaptive real-time processing in this paper some consideration on frequency domain processing are made. Two new variants of the well-known space-time processors described in pt.I are presented. All processors presented in the two twin papers are compared in terms of computational complexity which is equivalent to the real-time processing capability. It is shown that frequency domain processing may yield some advantage over space-time processing.","PeriodicalId":144063,"journal":{"name":"Proceedings of International Radar Conference","volume":"12 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":"127739813","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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