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Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)最新文献

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Integration of Bayes detection and target tracking in real clutter image sequences 杂波图像序列中贝叶斯检测与目标跟踪的集成
Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200) Pub Date : 2001-05-01 DOI: 10.1109/NRC.2001.922983
Marcelo G. S. Bruno, José M. F. Moura
{"title":"Integration of Bayes detection and target tracking in real clutter image sequences","authors":"Marcelo G. S. Bruno, José M. F. Moura","doi":"10.1109/NRC.2001.922983","DOIUrl":"https://doi.org/10.1109/NRC.2001.922983","url":null,"abstract":"We present an optimal Bayesian algorithm for integrated, multiframe detection and tracking of dim targets that move randomly in spatially correlated, cluttered image sequences. The algorithm consists of a multiframe minimum probability of error Bayes detector integrated with a multiframe maximum a posteriori (MAP) position estimator. The design of the detector/tracker incorporates the models for target signature, target motion, and clutter; it uses recursive spatio-temporal processing across all available frames to make detection decisions and to generate position estimates. A simulation with an artificial target template added to a real clutter background shows that the proposed algorithm outperforms the association of a standard single frame image correlator and a linearized Kalman-Bucy filter in a scenario of heavy clutter.","PeriodicalId":214828,"journal":{"name":"Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116799769","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: 9
Filters for polarimetric calibration of UWB SAR imagery 超宽频SAR图像偏振校正滤波器
Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200) Pub Date : 2001-05-01 DOI: 10.1109/NRC.2001.923018
G. Showman, J. McClellan
{"title":"Filters for polarimetric calibration of UWB SAR imagery","authors":"G. Showman, J. McClellan","doi":"10.1109/NRC.2001.923018","DOIUrl":"https://doi.org/10.1109/NRC.2001.923018","url":null,"abstract":"Polarimetric synthetic aperture radar (SAR) imagery is susceptible to degradation due to non-ideal responses in antennas and other hardware. Image corruption is especially serious in SAR operating over ultra-wide bandwidths (UWB) and imaging over wide angles, as the system response becomes a complicated function of angle and frequency. The usual approach to removing the system response from measured UWB SAR images involves operations in the two-dimensional spatial frequency domain of the imagery. We show that correction can also be performed by convolving the polarimetric images with two-dimensional polarimetric calibration filters (PCF). When compared to the frequency domain procedure, filtering offers improved calibration on extended-area targets, lower sidelobe noise, and computational savings. PCF can be synthesized from knowledge of the system response, or by an adaptive equalization technique that uses clutter returns to generate filters to correct for leakage, or crosstalk, between channels.","PeriodicalId":214828,"journal":{"name":"Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)","volume":"358 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122746551","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 stacked A-to-D converter for increased radar signal processor dynamic range 用于增加雷达信号处理器动态范围的堆叠A- d转换器
Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200) Pub Date : 2001-05-01 DOI: 10.1109/NRC.2001.922972
V. Gregers-Hansen, S. Brockett, P.E. Cahill
{"title":"A stacked A-to-D converter for increased radar signal processor dynamic range","authors":"V. Gregers-Hansen, S. Brockett, P.E. Cahill","doi":"10.1109/NRC.2001.922972","DOIUrl":"https://doi.org/10.1109/NRC.2001.922972","url":null,"abstract":"The need for increased dynamic range at the input to the radar digital signal processor has increased steadily over the last decade or so. This has been the result of lower expected radar cross sections, the need for better clutter suppression, and the desire to operate without sensitivity time control (STC) in some radar applications. The analog-to-digital converter (ADC) is the most significant bottleneck in achieving this needed dynamic range (DR). An approach for improving the effective DR utilizing multiple ADC is described. The ADC are arranged in parallel channels with different gains and the approach is referred to as a \"stacked A-to-D converter\", or \"stacked ADC\". Detailed results are presented for an experimental brassboard system assembled to demonstrate and evaluate the concept.","PeriodicalId":214828,"journal":{"name":"Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126252604","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
The spectrum of a digital radio frequency memory linear range gate stealer electronic attack signal 频谱的数字射频存储线性范围门窃取电子攻击信号
Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200) Pub Date : 2001-05-01 DOI: 10.1109/NRC.2001.922946
S. Berger
{"title":"The spectrum of a digital radio frequency memory linear range gate stealer electronic attack signal","authors":"S. Berger","doi":"10.1109/NRC.2001.922946","DOIUrl":"https://doi.org/10.1109/NRC.2001.922946","url":null,"abstract":"We examine the spectrum of a digital radio frequency memory (DRFM) linear rate gate stealer (RGS) electronic attack (EA) signal. The spectrum has two noticeable characteristics. The first is a small, yet measurable, center frequency shift from the input center frequency. The second is the presence of harmonics (spectral lines) of significant magnitude centered on either side of the shifted center frequency. The primary source of these spectral characteristics is the discrete nature of the DRFM. We develop expressions to predicted the center frequency shift and the locations of the harmonics as function of the radar and DRFM parameters. These spectral characteristics should be of interest to radar and EA engineers since they could potentially affect system performance. Signal intelligence analysts should also find these spectral characteristics of interest since they provide additional clues for assessing EA systems.","PeriodicalId":214828,"journal":{"name":"Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128889694","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
Bistatic STAP performance analysis in radar applications 雷达应用中的双基地STAP性能分析
Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200) Pub Date : 2001-05-01 DOI: 10.1109/NRC.2001.922977
B. Himed, J. Michels, Yuhong Zhang
{"title":"Bistatic STAP performance analysis in radar applications","authors":"B. Himed, J. Michels, Yuhong Zhang","doi":"10.1109/NRC.2001.922977","DOIUrl":"https://doi.org/10.1109/NRC.2001.922977","url":null,"abstract":"We consider the performance of several space-time adaptive processing (STAP) algorithms in a bistatic airborne radar application. Specific consideration is given to the effect of bistatic clutter spectral dispersion on covariance estimation and the algorithm's resulting clutter rejection capability. Our prime research focus emphasizes adaptive processing methods capable of high performance with efficient utilization of training data requiring no spectral compensation for dispersion mitigation; i.e., methods capable of operation with training data from radar range cells located in close proximity to the primary range test cell. Algorithm performance is assessed using the output signal-to-interference-plus-noise ratio (SINR) compared to that of the matched filter with known covariance.","PeriodicalId":214828,"journal":{"name":"Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)","volume":"353 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133236415","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: 39
Ocean wave observation by CW mm-wave radar with narrow beam 窄波束连续波毫米波雷达的海浪观测
Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200) Pub Date : 2001-05-01 DOI: 10.1109/NRC.2001.923012
M. Kondo, K. Kawai, H. Hirano, T. Fujisaka
{"title":"Ocean wave observation by CW mm-wave radar with narrow beam","authors":"M. Kondo, K. Kawai, H. Hirano, T. Fujisaka","doi":"10.1109/NRC.2001.923012","DOIUrl":"https://doi.org/10.1109/NRC.2001.923012","url":null,"abstract":"A new ocean wave spectra observation method applied to intermittent back specula reflecting signal obtaining from a narrow radio beam spot on the water wave surface is proposed. The method uses a shipborne BBM CW mm wave Doppler radar with narrow beam. The wave spectra and velocity component are directly obtained from the received Doppler signal. Moreover the wave traveling direction and wave vector velocity are also obtained from multi-observation of azimuth directions. These are successfully evaluated on ocean wave data obtained by the radar.","PeriodicalId":214828,"journal":{"name":"Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114634191","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
New ranging algorithm for FM/CW radars 调频/连续波雷达测距新算法
Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200) Pub Date : 2001-05-01 DOI: 10.1109/NRC.2001.923016
B. Cantrell, H. Faust, A. Caul, A. O'Brien
{"title":"New ranging algorithm for FM/CW radars","authors":"B. Cantrell, H. Faust, A. Caul, A. O'Brien","doi":"10.1109/NRC.2001.923016","DOIUrl":"https://doi.org/10.1109/NRC.2001.923016","url":null,"abstract":"A new ranging algorithm for frequency modulated/continuous wave (FM/CW) radars is given. This algorithm is near optimal, very robust, does not depend on the type of modulation, and is fairly easy to compute. An example of an older algorithm based on sinusoidal frequency modulation (FM) used on the MK-95 CW radar is given to illustrate shortcomings in typical older algorithms and for comparison purposes. The characteristics of the new ranging algorithm and test results from the MK-95 radar are provided. The actual target range and the one calculated using the new ranging algorithm differed by less than 1%.","PeriodicalId":214828,"journal":{"name":"Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128297142","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: 2
Omega-k quadtree UWB SAR focusing -k四叉树超宽带SAR聚焦
Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200) Pub Date : 2001-05-01 DOI: 10.1109/NRC.2001.922997
M. Cobb, J. McClellan
{"title":"Omega-k quadtree UWB SAR focusing","authors":"M. Cobb, J. McClellan","doi":"10.1109/NRC.2001.922997","DOIUrl":"https://doi.org/10.1109/NRC.2001.922997","url":null,"abstract":"A variation on the quadtree algorithm for ultra-wideband, wide-angle (UWB-WA) SAR imaging that uses the /spl omega/-k algorithm for final stage focusing is introduced. Several signal processing techniques appropriate to the requirements of UWB-WA SAR, and that prevent errors and artifacts in the /spl omega/-k focusing are reviewed. These techniques include spatial and temporal shifts for spotlight data, elimination of ghost targets, and adjustments needed to account for the virtual sampling of the quadtree algorithm. In order to justify these techniques, a simple Fourier-based model of the imaging problem appropriate to UWB-WA SAR is presented.","PeriodicalId":214828,"journal":{"name":"Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116590776","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: 10
Performance analysis of the nonhomogeneity detector for STAP applications STAP应用中非均匀性检测器的性能分析
Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200) Pub Date : 2001-05-01 DOI: 10.1109/NRC.2001.922976
M. Rangaswamy, B. Himed, J. Michels
{"title":"Performance analysis of the nonhomogeneity detector for STAP applications","authors":"M. Rangaswamy, B. Himed, J. Michels","doi":"10.1109/NRC.2001.922976","DOIUrl":"https://doi.org/10.1109/NRC.2001.922976","url":null,"abstract":"We consider the statistical analysis of a recently proposed nonhomogeneity detector (NHD) for Gaussian interference statistics. We show that a formal goodness-of-fit test can be constructed by accounting for the statistics of the generalized inner product (GIP). Specifically, the normalized-GIP follows a central-F distribution. This fact is used to derive the goodness-of-fit test. We also address the issue of space-time adaptive processing (STAP) algorithm performance using the NHD as a preprocessing step for training data selection. Performance results are reported using simulated as well as measured data.","PeriodicalId":214828,"journal":{"name":"Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125980977","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: 30
Effects of internal clutter motion on STAP in a heterogeneous environment 内杂波运动对非均匀环境下STAP的影响
Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200) Pub Date : 2001-05-01 DOI: 10.1109/NRC.2001.922978
P. Techau, J. Bergin, J. Guerci
{"title":"Effects of internal clutter motion on STAP in a heterogeneous environment","authors":"P. Techau, J. Bergin, J. Guerci","doi":"10.1109/NRC.2001.922978","DOIUrl":"https://doi.org/10.1109/NRC.2001.922978","url":null,"abstract":"Clutter is typically modeled as stationary (i.e., zero Doppler shift) scatter from the surface. Thus for ground-based systems the clutter is contained at zero Doppler while airborne systems will observe clutter spread in Doppler due to platform motion (i.e., the classic angle-Doppler clutter 'ridge'). However, motion internal to the background clutter of vegetation, etc., will result in the clutter having non-zero bandwidth. This effect, generally referred to as internal or intrinsic clutter motion, will tend to increase the rank of the clutter in the space-time adaptive processing (STAP) covariance matrix. We examine the effect of this phenomenon on STAP. We consider the effects of a heterogeneous environment and provide examples based on site-specific terrain data that illustrate the impact on STAP performance.","PeriodicalId":214828,"journal":{"name":"Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125948596","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: 26
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