Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)最新文献_第4页

A matrix clutter processor for agile beam radars 敏捷波束雷达的矩阵杂波处理器

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.1998.677993

H. Urkowitz, H. Owen

{"title":"A matrix clutter processor for agile beam radars","authors":"H. Urkowitz, H. Owen","doi":"10.1109/NRC.1998.677993","DOIUrl":"https://doi.org/10.1109/NRC.1998.677993","url":null,"abstract":"The removal of ground clutter from a Doppler shifted radar echo is examined from a non-traditional point of view that is particularly apt for an agile beam radar and digital signal processing. The observation in such a radar is, for each range sample, a finite duration sequence of complex envelope values. Thus, the observation is a complex vector. Clutter removal is the act of operating upon the observation vector to produce another vector that has its clutter component eliminated or substantially reduced. The operation is a matrix transformation that is, essentially, the inverse of the covariance matrix of the interference-noise plus clutter. The resulting vector is then applied to a bank of Doppler processes to produce: (a) test statistics for target detection; (b) spectral analysis to get the spectral moments of meteorological echo. The matrix processing approach removes the necessity for such things as initialization of the clutter filter. Spectral analysis is emphasized. The frequency response, clutter attenuation, and clutter improvement factor are defined in view of the matrix processing approach. In addition, the bias to be expected because of the clutter and its removal are analyzed and graphs are presented showing the bias to be expected for various spectral widths of clutter versus the frequency \"notch\" width of the matrix processor.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"2 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":"132777467","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

Detection in distributed Rayleigh clutter 分布式瑞利杂波检测

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.1998.677999

T. Foreman, S. G. Wilson

引用次数: 8

Airborne ground moving target indication using non-side-looking antennas 使用非侧视天线的机载地面移动目标指示

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.1998.678013

T. Nohara, P. Weber, A. Premji, T. Bhattacharya

{"title":"Airborne ground moving target indication using non-side-looking antennas","authors":"T. Nohara, P. Weber, A. Premji, T. Bhattacharya","doi":"10.1109/NRC.1998.678013","DOIUrl":"https://doi.org/10.1109/NRC.1998.678013","url":null,"abstract":"It is well known that detection of moving targets using an airborne radar is complicated by platform-induced spectral spreading of clutter returns. As a result, conventional pulse Doppler radars require a target to have a minimum detectable velocity (MDV) to be clear of mainbeam (and sidelobe) clutter. Extensive research into side-looking, multi-channel (i.e. multi-aperture) radars employing space-time adaptive processing (STAP) and displaced phase centre antenna (DPCA) processing techniques has been conducted, in order to reduce the requirement on MDV for airborne early warning (AEW) radar applications. GMTI (ground moving target indication) radars like JSTARS also employ similar techniques to detect slow ground moving targets such as tanks and jeeps. Most of the literature deals with side-looking airborne radars (SLAR), which is the case when the aperture phase centres lie along a line parallel to the flight path. This paper considers the design and performance of GMTI radars for the general, non-SLAR case, where the array is oriented away from the side, the extreme case being a forward-looking airborne radar (FLAR). A non-SLAR GMTI radar is attractive because it is applicable to mechanically rotated antenna arrays, often used for wide-angle surveillance; and, as a result, can be considered as an upgrade to existing surveillance radars.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"2 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":"114434320","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: 15

Autofocus for inverse synthetic aperture radar (ISAR) imaging by beamforming 基于波束形成的逆合成孔径雷达(ISAR)成像自动对焦

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.1998.678006

Z. She, R. Bogner, D. Gray

引用次数: 0

Data selection strategies for radar space time adaptive processing 雷达时空自适应处理中的数据选择策略

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.1998.678001

P. Lombardo

引用次数: 3

Phased array radar tracking with non-uniformly spaced measurements 非均匀间隔测量相控阵雷达跟踪

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.1998.677975

T. W. Jeffrey

引用次数: 2

Model order selection for multidimensional innovations based detection in airborne radar 基于机载雷达的多维创新检测模型阶数选择

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.1998.677991

J. Castro, J. LeBlanc

引用次数: 4

Experimental observation and modeling of overland height finding 地面测高的实验观测与模拟

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.1998.678037

L. Zurk, B. Geddes

引用次数: 4

Mitigating effects on STAP processing caused by an inclined array 减轻倾斜阵列对STAP处理的影响

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.1998.677990

G.K. Borsari

引用次数: 130

Adaptive mainbeam jamming suppression for multi-function radars 多功能雷达自适应主波束干扰抑制

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.1998.678002

T. Nohara, P. Weber, A. Premji

{"title":"Adaptive mainbeam jamming suppression for multi-function radars","authors":"T. Nohara, P. Weber, A. Premji","doi":"10.1109/NRC.1998.678002","DOIUrl":"https://doi.org/10.1109/NRC.1998.678002","url":null,"abstract":"One aspect of naval defence involves surveillance of the airspace in the vicinity of one's vessel. Both high-altitude and low-altitude missiles must be detected, tracked and targeted. A multi-function radar (MFR) that uses an electrically steerable pencil beam (phased array) to search the volume around the ship can provide the required capability. Monopulse sum and difference beams (azimuth and elevation) are provided to yield high resolution direction of arrival (DOA) estimates for detected targets, improving ship defence capabilities against modern threats. This paper is concerned with robust estimation of low-altitude targets such as sea skimming missiles for the challenging case where horizon-based jammers are present in the antenna's mainbeam. By exploiting the properties of the monopulse beams, spatially adaptive algorithms are developed that provide simultaneous mainbeam nulling and high-resolution target DOA estimation. Simulation results demonstrate the detection and estimation performance achievable. DOA estimates using suitably derived MUSIC (multiple signal classification), ML (maximum likelihood) and corrected adaptive monopulse (CAM) algorithms are compared.","PeriodicalId":432418,"journal":{"name":"Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)","volume":"50 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":"130984507","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