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Proceedings of the 1988 IEEE National Radar Conference最新文献

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A new non-linear filtering algorithm with application to radar images 一种适用于雷达图像的非线性滤波新算法
Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10953
A. Hillion, J. Boucher
{"title":"A new non-linear filtering algorithm with application to radar images","authors":"A. Hillion, J. Boucher","doi":"10.1109/NRC.1988.10953","DOIUrl":"https://doi.org/10.1109/NRC.1988.10953","url":null,"abstract":"Under the assumption of log-normal speckle, the performances of various filtering algorithms (linear, homomorphic, alpha -linear, log-linear, generalized linear) are compared for processing radar images corrupted by speckle noise. The existence of a best estimator, the definition of which depends on the level of the speckle noise, is demonstrated. Theoretical investigations and case studies are discussed that show how to choose between linear filtering or log-linear filtering depending on the level of the noise in the image. If the noise level is high, the log-linear filtering is preferred; if the noise level is low, the linear filtering may be used.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132706241","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: 6
Autoregressive moving average modeling of radar target signatures 雷达目标特征的自回归移动平均建模
Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10962
R. Carriere, R. Moses
{"title":"Autoregressive moving average modeling of radar target signatures","authors":"R. Carriere, R. Moses","doi":"10.1109/NRC.1988.10962","DOIUrl":"https://doi.org/10.1109/NRC.1988.10962","url":null,"abstract":"A method for characterizing radar target signatures with autoregressive moving average (ARMA) models is developed. A parameterization of the model that corresponds directly to the geometric properties of the target is chosen, and an efficient algorithm for estimating these parameters is presented. Procedures for minimizing the effects of unmodeled dynamics are also developed. Experiments on radar measurements obtained from a compact-range are presented to test the effectiveness of the ARMA modeling procedure on scale models of several commercial aircraft.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"18 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132645257","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: 22
Aircraft on-board SAR processing using a frequency-domain fast correlation technique 飞机机载SAR处理采用频域快速相关技术
Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10951
K. Liu
{"title":"Aircraft on-board SAR processing using a frequency-domain fast correlation technique","authors":"K. Liu","doi":"10.1109/NRC.1988.10951","DOIUrl":"https://doi.org/10.1109/NRC.1988.10951","url":null,"abstract":"The design of a frequency-domain fast correlation processor for aircraft onboard synthetic-aperture radar (SAR) applications is described. The design uses the fast Fourier transform (FFT) fast correlation technique to perform both range and azimuth pulse compression functions for the NASA/JPL L-band, quadpolarization airborne SAR. The subject processor is computationally efficient and requires a simple control unit. It is capable of producing single-look, 8-m (slant range) by 10-m (azimuth) resolution, SAR images of a selected polarization over a swath width of up to 15 km in real time onboard the aircraft.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122912119","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
Polarimetric X/L/C-band SAR 偏振X/L/ c波段SAR
Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10922
R. Sullivan, A. D. Nichols, R. Rawson, C. W. Haney, F.P. Darreff, J. Schanne
{"title":"Polarimetric X/L/C-band SAR","authors":"R. Sullivan, A. D. Nichols, R. Rawson, C. W. Haney, F.P. Darreff, J. Schanne","doi":"10.1109/NRC.1988.10922","DOIUrl":"https://doi.org/10.1109/NRC.1988.10922","url":null,"abstract":"A triband polarimetric synthetic-aperture radar (SAR) developed for remote sensing applications and installed in a US Navy P-3 aircraft is described. In this SAR, pulses are transmitted at either X-, C-, or L-band. They may be transmitted at either horizontal (H) or vertical (V) polarization and received at either horizontal or vertical polarization. Transmit and receive polarization, as well as frequency band, may be switched pulse-to-pulse. Up to four different waveforms may be interleaved, e.g. X/sub HH/ L/sub HV/ X/sub VV/ C/sub VH/ or X/sub HH/ X/sub HV/ X/sub VH/ X/sub VV/ (full-polarimetric model). A digital synthesizer produces the FM-chirp pulse. The pulse is emitted from a triband antenna that is kept perpendicular to the aircraft ground track by a three-axis, servo-driven positioner which compensates for aircraft pitch, roll, and yaw. Received pulses are digitized, preprocessed, and recorded to high-density digital tape. Test flights and preliminary imagery obtained are briefly noted.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127688256","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: 29
MK IV/RPS pulse radar cross section measurement system MK IV/RPS脉冲雷达截面测量系统
Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10929
C.A. Foy, E. Sager, A. C. Schultheis, T. Thompson
{"title":"MK IV/RPS pulse radar cross section measurement system","authors":"C.A. Foy, E. Sager, A. C. Schultheis, T. Thompson","doi":"10.1109/NRC.1988.10929","DOIUrl":"https://doi.org/10.1109/NRC.1988.10929","url":null,"abstract":"The MK IV/radar processing system (RPS) pulse radar cross section (RCS) measurement system is designed to create and present accurate data on the radar scattering properties of a model or operational platform under static or dynamic conditions in an indoor or outdoor research and development, production, or operational environment. A description of the system is provided and data representing system performance is presented.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121191622","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
Characteristics of autoregressive spectral estimation in range-Doppler imaging 距离-多普勒成像中自回归谱估计的特点
Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10943
Y.-W. Chen, R. Berkowitz
{"title":"Characteristics of autoregressive spectral estimation in range-Doppler imaging","authors":"Y.-W. Chen, R. Berkowitz","doi":"10.1109/NRC.1988.10943","DOIUrl":"https://doi.org/10.1109/NRC.1988.10943","url":null,"abstract":"The characteristics of autoregressive spectral estimation (ARSE) in range-Doppler imaging are studied with respect to three ARSE algorithms. These are the forward-backward linear prediction (FBLP) algorithm, the Burg algorithm, and the modified forward-backward linear prediction (MFBLP) algorithm. The mathematical interpretations of these algorithms are addressed, and simulation results demonstrating these characteristics for the radar images constructed are presented.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129348915","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
A direct digitally synthesized exciter achieving near theoretical performance for an operational SAR system 一种接近理论性能的直接数字合成激励器，用于作战SAR系统
Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10924
W.D. Gallaway, K. Luckscheiter, E. Cowen, J. Wilhelm
{"title":"A direct digitally synthesized exciter achieving near theoretical performance for an operational SAR system","authors":"W.D. Gallaway, K. Luckscheiter, E. Cowen, J. Wilhelm","doi":"10.1109/NRC.1988.10924","DOIUrl":"https://doi.org/10.1109/NRC.1988.10924","url":null,"abstract":"The design of a directly digitally synthesized exciter for linear FM chirp generation in a synthetic-aperture radar (SAR) system is discussed. The exciter is implemented with integrated circuits that are contained on the Eurocard wirewrap boards. A procedure developed for analyzing the phase and amplitude errors present in the digitally synthesized exciter is also discussed. Once these errors were determined, a method for reducing them was used which was highly effective. A description of the measurement setup used, as well as measured data results is given. The measurement results show the effects of the phase errors before and after correction. Two types of plots are included. One type plots the phase error of the chirp pulse as a function of time. The other type of plot shows the compressed chirp waveform pressed in the same fashion as the radar system processes data.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126658355","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: 6
Digital filters for synthetic aperture radar 合成孔径雷达用数字滤波器
Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10952
J. Adams, G.W. Medlin, R. W. Bayma
{"title":"Digital filters for synthetic aperture radar","authors":"J. Adams, G.W. Medlin, R. W. Bayma","doi":"10.1109/NRC.1988.10952","DOIUrl":"https://doi.org/10.1109/NRC.1988.10952","url":null,"abstract":"An organized approach is discussed for designing a set of optimal digital filters that can accommodate a wide range of synthetic-aperture radar (SAR) geometries. The basic SAR signal processing functions are reviewed since they are the basis for the filter design problems. Special digital filter optimality criteria are described that are tailored to the SAR environment. The results from recent filter design publications related to these criteria are summarized and examples are included to demonstrate the effectiveness of this approach to designing filters for SAR processors.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125177961","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
A basis for SAR oceanography: theory and experiment SAR海洋学基础:理论与实验
Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10957
R.O. Harger, C. Korman
{"title":"A basis for SAR oceanography: theory and experiment","authors":"R.O. Harger, C. Korman","doi":"10.1109/NRC.1988.10957","DOIUrl":"https://doi.org/10.1109/NRC.1988.10957","url":null,"abstract":"A comparison of synthetic-aperture radar (SAR) sea images generated by a simulation program implementing a two-scale theory and by the Jet Propulsion Laboratory L-band SAR flow in the TOWARD oceanographic experiment is discussed. A subimage cross-correlation technique estimates the best image focus. The sea surface imagery is composed of two scales, a long-wave ensemble and a short-wave ensemble, and both gravity waves. The appropriate two-scale hydrodynamic and electromagnetic scattering approximate models are combined with a model for SAR imaging of a time-variant, extended scene. The resulting model is complicated and generally requires a simulation, which generates the complex, high-resolution SAR image to reveal its full nature. The two-scale theory's predictions agree well with the actual measurements, including the discriminating prediction that the best focus correction is proportional to the long wave's phase velocity.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126285256","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
A statistical model for prediction of precision and accuracies of radar scattering coefficient ( sigma degrees ) measurements derived from SAR data 基于SAR数据的雷达散射系数(西格玛度)测量精度和准确度预测的统计模型
Proceedings of the 1988 IEEE National Radar Conference Pub Date : 1988-04-20 DOI: 10.1109/NRC.1988.10942
E. Kasischke, G. W. Fowler, C. Wackerman
{"title":"A statistical model for prediction of precision and accuracies of radar scattering coefficient ( sigma degrees ) measurements derived from SAR data","authors":"E. Kasischke, G. W. Fowler, C. Wackerman","doi":"10.1109/NRC.1988.10942","DOIUrl":"https://doi.org/10.1109/NRC.1988.10942","url":null,"abstract":"A model is presented to estimate a relative error-bound associated with radiometric calibration of the scattering coefficient derived from synthetic-aperture radar (SAR) data. This error bound is based on a statistical coefficient-of-variation error model. The error model was exercised parametrically to determine what factors most significantly influence radiometric errors from SAR systems. It was found that errors in the measurement of the antenna elevation gain-pattern resulted in the most dramatic increases in the statistical error bound. The results from this analysis can be utilized in both the design of SAR systems and measurements programs needed to calibrate SAR systems to minimize the error bounds associated with radiometric calibration.<<ETX>>","PeriodicalId":237192,"journal":{"name":"Proceedings of the 1988 IEEE National Radar Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132228098","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
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