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Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)最新文献

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Empirical study of polarization techniques for clutter reduction 杂波抑制极化技术的实证研究
Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI: 10.1109/NRC.1998.678035
H. Yamaguchi, A. Kajiwara, S. Hayashi
{"title":"Empirical study of polarization techniques for clutter reduction","authors":"H. Yamaguchi, A. Kajiwara, S. Hayashi","doi":"10.1109/NRC.1998.678035","DOIUrl":"https://doi.org/10.1109/NRC.1998.678035","url":null,"abstract":"This paper discusses the feasibility of clutter reduction by a radar polarization technique for the signal-to-clutter ratio (S/C) improvement. The polarization dependency on surface roughness is numerically investigated and the measurement for a target model is also carried out at 94 GHz.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125481573","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}
引用次数: 1
Propagation modeling for VHF/UHF-radar detection of targets behind a forest VHF/ uhf雷达探测森林后目标的传播建模
Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI: 10.1109/NRC.1998.678022
H. Kuschel, D. Schneider
{"title":"Propagation modeling for VHF/UHF-radar detection of targets behind a forest","authors":"H. Kuschel, D. Schneider","doi":"10.1109/NRC.1998.678022","DOIUrl":"https://doi.org/10.1109/NRC.1998.678022","url":null,"abstract":"The detection of targets below line-of-sight has been one of the driving subjects in the research, related to the VHF-experimental radar LARISSA (Large wavelength Radar with Interference dependent Spectral Signal Adaptation), developed and operated at FGAN-FHP. A realistic prediction of the attenuation of electromagnetic waves caused by propagation through and above forest areas plays an important role for the configuration and performance evaluation of a VHF radar dedicated to detect hovering helicopters beyond terrain obstacles. In order to evaluate the transmission attenuation above a forest, measurements have been performed on a selected forest area near FGAN. The measurement results have been compared to a propagation model, which regards the forest as a sequence of ideally conducting diffraction screens. This study was conducted to develop, a generalized model for radio wave propagation above forests under the constraint of easy applicability to a coverage prediction model based on a digital terrain database. The measurements and calculations were restricted to horizontal polarization, as being of major importance for the detection of helicopter rotor echoes.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129401132","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}
引用次数: 0
Target extraction from clutter images using wavelet packet analysis 基于小波包分析的杂波图像目标提取
Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI: 10.1109/NRC.1998.678000
HyungJun Kim, P. Liang
{"title":"Target extraction from clutter images using wavelet packet analysis","authors":"HyungJun Kim, P. Liang","doi":"10.1109/NRC.1998.678000","DOIUrl":"https://doi.org/10.1109/NRC.1998.678000","url":null,"abstract":"We present a wavelet shrinkage method that yields high clutter suppression by using a best-tree wavelet packet analysis. An integrated automatic target recognition processor utilizing a wavelet packet transform and a shape extraction method is introduced to demonstrate the feasibility of using wavelet packet analysis for automatic target extraction from synthetic aperture radar (SAR) images. Two analysis procedures are processed independently and the two outputs from each process are combined to increase the detection performance. Experimental demonstrations of target extraction are also provided. The preliminary experiments show that target extraction using wavelet packet analysis has high detection performance as well as low false detection performance.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132518193","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}
引用次数: 1
Photonic remoting of AN/SPQ-9B ADM ultra high dynamic range radar AN/SPQ-9B ADM超高动态距离雷达的光子遥控
Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI: 10.1109/NRC.1998.677970
J. Roman, L. Nichols, K. Williams, R. Esman, G. Tavik, M. Livingston, M. Parent
{"title":"Photonic remoting of AN/SPQ-9B ADM ultra high dynamic range radar","authors":"J. Roman, L. Nichols, K. Williams, R. Esman, G. Tavik, M. Livingston, M. Parent","doi":"10.1109/NRC.1998.677970","DOIUrl":"https://doi.org/10.1109/NRC.1998.677970","url":null,"abstract":"We report initial demonstrations of photonic technology meeting the stringent phase noise and signal-to-noise ratio (SNR) requirements for remoting radars. In particular, fiber optic links were used to remote the antenna and transmitter of the Navy AN/SPQ-9B ADM radar. The remoting links tested successfully in a transmit configuration without significantly degrading the 87 dB SNR of the radar. These results show the potential of photonic technology to remote other radars such as active arrays.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125332943","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}
引用次数: 3
A multistage STAP CFAR detection technique 多级STAP CFAR检测技术
Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI: 10.1109/NRC.1998.677986
J. S. Goldstein, I. Reed, P. Zulch, W. Melvin
{"title":"A multistage STAP CFAR detection technique","authors":"J. S. Goldstein, I. Reed, P. Zulch, W. Melvin","doi":"10.1109/NRC.1998.677986","DOIUrl":"https://doi.org/10.1109/NRC.1998.677986","url":null,"abstract":"This paper introduces a new method of partially adaptive CFAR detection. The processor implements a novel sequence of orthogonal subspace projections to decompose the Wiener solution in terms of the cross-correlation observed at each stage. The detection performance is evaluated in the general framework of space-time adaptive processing. It is demonstrated that this new approach to partially adaptive CFAR detection outperforms the more complex eigen-analysis approaches using true pulse-Doppler radar data collected by the multichannel airborne radar measurements (MCARM) radar.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131574526","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}
引用次数: 17
Intelligent low rate compression of speckled SAR imagery 斑点SAR图像的智能低速率压缩
Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI: 10.1109/NRC.1998.678007
R. Ives, P. Eichel, N. Magotra
{"title":"Intelligent low rate compression of speckled SAR imagery","authors":"R. Ives, P. Eichel, N. Magotra","doi":"10.1109/NRC.1998.678007","DOIUrl":"https://doi.org/10.1109/NRC.1998.678007","url":null,"abstract":"This paper describes a compression technique under development at Sandia National Laboratories for the compression of complex synthetic aperture radar (SAR) imagery at very low overall bit rates. The methods involved combine several elements of existing and new lossy and lossless compression schemes in order to achieve an overall compression ratio of large SAR scenes of at least 50:1, while maintaining reasonable image quality. It is assumed that the end user will be primarily interested in specific regions of interest within the image (called \"chips\"), but that the context in which these chips appear within the entire scene is also of importance to an image analyst. The term \"intelligent\" is used to signify an external cuer which locates the chips of interest.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114411891","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}
引用次数: 5
An auto-regressive GLR algorithm for adaptive radar detection 自适应雷达探测的自回归GLR算法
Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI: 10.1109/NRC.1998.678016
A. Sheikhi, M. Nayebi
{"title":"An auto-regressive GLR algorithm for adaptive radar detection","authors":"A. Sheikhi, M. Nayebi","doi":"10.1109/NRC.1998.678016","DOIUrl":"https://doi.org/10.1109/NRC.1998.678016","url":null,"abstract":"A detector for the case of a radar target with known Doppler and unknown complex amplitude in colored noise of unknown covariance has been derived. The detector assumes that the noise is an autoregressive process and estimates the unknown parameters by maximum likelihood estimation for the use in the generalized likelihood ratio test. The asymptotic performance of this detector has been derived and it has been shown that for large data records this detector is CFAR. By computer simulation it has been shown that for a moderate size of data record, the performance of this detector approaches the asymptotic results.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123014287","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}
引用次数: 4
Description and analysis of a Bayesian CFAR radar signal processor in a nonhomogeneous clutter background 非均匀杂波背景下贝叶斯CFAR雷达信号处理器的描述与分析
Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI: 10.1109/NRC.1998.677968
R.C. Colgin
{"title":"Description and analysis of a Bayesian CFAR radar signal processor in a nonhomogeneous clutter background","authors":"R.C. Colgin","doi":"10.1109/NRC.1998.677968","DOIUrl":"https://doi.org/10.1109/NRC.1998.677968","url":null,"abstract":"A major problem that occurs in constant false alarm rate (CFAR) schemes is presented by regions of nonhomogeneous clutter background. The situation occurs when the total noise power received in a single reference window does not follow the assumption of independent and identically distributed clutter in all reference window cells. Bayesian statistics provide a mathematical procedure for changing or updating the degree of belief about the clutter parameter in light of more recent information. A Bayesian CFAR (Bay-CFAR) processor is developed and analyzed. The Bay-CFAR processor exploits a priori knowledge of a nonhomogeneous clutter environment to considerably improve the detection performance relative to a classical cell averaging CFAR (CA-CFAR) processor. The performance improvement is demonstrated with a small reference window size that allows the processor to respond quickly to a rapidly changing clutter environment.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125453349","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}
引用次数: 3
The International Radar Directory: who makes what and where 国际雷达目录:谁制造什么，在哪里
Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI: 10.1109/NRC.1998.677981
S. Johnston
{"title":"The International Radar Directory: who makes what and where","authors":"S. Johnston","doi":"10.1109/NRC.1998.677981","DOIUrl":"https://doi.org/10.1109/NRC.1998.677981","url":null,"abstract":"The newly compiled International Radar Directory CD-ROM resulted from a twenty year collection effort by this author of open information on radars of the world. During World War II radars were made in only a few countries, but are now manufactured in many countries. Radar applications now included number some 50. Radar is frequently teamed with military IR/EO/laser/weapon systems; however, in many of these the radar is sometimes not given its own type designation. Thus it is appropriate to include IR/EO/laser/weapon systems in this Directory CD-ROM on current radar systems. This paper describes the 1998 Directory CD-ROM and presents an illustrative example of use of information contained in it: who makes what and where. Consideration is given to adding the large number of past radars to a future Directory CD-ROM.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115542993","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}
引用次数: 0
Automated Nap of the Earth (ANOE) data collection radar 地球自动探测(ANOE)数据收集雷达
Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI: 10.1109/NRC.1998.677971
J. Kirk, R. Lefevre, R. Durand, L. Bui, R. Zelenka, B. Sridhar
{"title":"Automated Nap of the Earth (ANOE) data collection radar","authors":"J. Kirk, R. Lefevre, R. Durand, L. Bui, R. Zelenka, B. Sridhar","doi":"10.1109/NRC.1998.677971","DOIUrl":"https://doi.org/10.1109/NRC.1998.677971","url":null,"abstract":"Under a Phase II SBIR from NASA, a data collection radar was developed to support the NASA program in Automated Napof the Earth (ANOE) guidance for helicopters. The developed radar is comprised of two parts, a sensor front end and a digital signal processor. The sensor front end is a wideband, linear FM, 94 GHz millimeter wave radar with dual circular polarization and dual axis monopulse. It provides 10 dB signal-to-noise on a 5 m/sup 2/ target at 1 km. Digital signal processing is employed to provide range compression and monopulse angle beam sharpening. To remain within funding limitations the radar generates a reduced size raster scan of 12.5/spl deg/ /spl times/250/spl times/320 m for collecting data. The range resolution is 3 m, the angle bin size is 0.34/spl deg/, and there is frequency agility over 600 MHz. Data was collected from a ground location to verify operation of the radar. The data is displayed in a C-scope format using NASA supplied \"Grid World\" software.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116546779","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}
引用次数: 7
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