RADAR 2002 Pub Date : 2003-04-08 DOI: 10.1109/RADAR.2002.1174696

J. Meyer-Hilberg, B. Bickert, K. Schmitt

{"title":"Results of flight tests of a two-channel radar system with real-time MTI processing","authors":"J. Meyer-Hilberg, B. Bickert, K. Schmitt","doi":"10.1109/RADAR.2002.1174696","DOIUrl":"https://doi.org/10.1109/RADAR.2002.1174696","url":null,"abstract":"In synthetic aperture radar (SAR), only fixed targets are mapped on their correct positions. Moving targets are displaced in azimuthal direction due to the Doppler frequency shift caused by target velocities. The detection and correct positioning of moving targets within SAR images is a problem that can be solved by using multiple antennas and multi-channel receivers. For the detection of slow moving targets or moving targets that are backfolded into the clutter spectrum, a good suppression of fixed target echoes is necessary to gain subclutter visibility. Space-time adaptive processing (STAP) shows good performance in clutter suppression and is state of the art. However, the main disadvantage of conventional STAP techniques is the very high computational load. Therefore, performing STAP in real-time for the purpose of on-board subclutter moving target indication (MTI) requires special techniques. To estimate the true azimuthal positions of moving targets, phase differences between receiver channels can be evaluated e.g. by using the well-known monopulse method. Alternatively, STAP can be applied to solve this problem as well. STAP in real-time is discussed for two applications. First, STAP can be used for suppressing clutter and jammers. Moreover, clutter filter coefficients gained by STAP can be used for the purpose of correct positioning of moving targets within SAR images. Results of this real-time STAP technique as well as results of the moving target repositioning technique are presented: the clutter suppression quality and the moving target repositioning accuracy are demonstrated with real SAR data and moving targets recorded during a measurement campaign.","PeriodicalId":292020,"journal":{"name":"RADAR 2002","volume":"10894 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121099673","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

Detection and imaging of arbitrarily moving targets with single-channel SAR 基于单通道SAR的任意运动目标检测与成像

RADAR 2002 Pub Date : 2003-04-08 DOI: 10.1109/RADAR.2002.1174697

M. Kirscht

引用次数: 165

Comparison of Doppler clutter cancellation techniques for naval multi-function radars 舰船多功能雷达多普勒杂波消除技术比较

RADAR 2002 Pub Date : 2003-04-08 DOI: 10.1109/RADAR.2002.1174740

W. Dawber, N.M. Harwood

引用次数: 5

Comparison between LS and TLS in adaptive processing for radar systems 雷达系统自适应处理中LS与TLS的比较

RADAR 2002 Pub Date : 2003-04-08 DOI: 10.1109/RADAR.2002.1174716

A. Farina, G. Golino, L. Timmoneri

{"title":"Comparison between LS and TLS in adaptive processing for radar systems","authors":"A. Farina, G. Golino, L. Timmoneri","doi":"10.1109/RADAR.2002.1174716","DOIUrl":"https://doi.org/10.1109/RADAR.2002.1174716","url":null,"abstract":"Electromagnetic noise like interference (NLI) disturbs the proper working of radar by injecting noise from specific angular directions. Phased-array radars contrast this phenomenon via adaptive spatial filtering of the interference; this objective is reached by distorting the receiving antenna pattern by generating a null in the interference direction of arrival (IDoA). In the real world the adaptive cancellation of directional interference is limited, among other error sources, by the presence of clutter and by the amplitude and phase mismatch of receiving channels; thus adaptive signal processing strategies have to be conceived to permit the NLI cancellation in real environment. This paper compares two methods for adaptive signal processing in modem radar systems. We recall the working principles of the least squares (LS) and total least squares (TLS) algorithms. These processing methods are applied to three study cases in adaptive phased-array radar. We study the estimation of the jamming covariance matrix in presence of clutter in an adaptive phased-array. The null depth in adaptive jammer cancellation is then analyzed, and the problem of equalization of receiving channels is considered.","PeriodicalId":292020,"journal":{"name":"RADAR 2002","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134542810","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: 11

Effects of bistatic clutter dispersion on STAP systems 双基地杂波色散对STAP系统的影响

RADAR 2002 Pub Date : 2003-04-08 DOI: 10.1109/RADAR.2002.1174719

B. Himed

引用次数: 29

Real time detection and compensation of registration errors in a network of radars 雷达网配准误差的实时检测与补偿

RADAR 2002 Pub Date : 2002-11-07 DOI: 10.1109/RADAR.2002.1174644

S. Rhodes

引用次数: 4

Accounting for array effects in joint-domain localized STAP processing 联合域局域STAP处理中阵列效应的计算

RADAR 2002 Pub Date : 1900-01-01 DOI: 10.1109/RADAR.2002.1174679

B. Himed, M. Wicks, G. Genello