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Clutter Suppression in GPR Using Chaos Modulation 利用混沌调制抑制GPR中的杂波
2006 International Radar Symposium Pub Date : 2006-05-24 DOI: 10.1109/IRS.2006.4338060
Xiaoxiang Liu, H. Leung
{"title":"Clutter Suppression in GPR Using Chaos Modulation","authors":"Xiaoxiang Liu, H. Leung","doi":"10.1109/IRS.2006.4338060","DOIUrl":"https://doi.org/10.1109/IRS.2006.4338060","url":null,"abstract":"In this paper, a chaotic radar is designed in which the transmitted signals are formed through modulating the amplitude of ultra wideband (UWB) signals using chaos. It is illustrated that the proposed radar has an excellent resolution performance as well as the capability of sidelobe suppression that is significant in ground penetrating radar (GPR) applications. Additionally, an expectation maximization (EM) based method is proposed to form a non-coherent receiver that conducts blind ground clutter equalization. The identification and equalization performance of the proposed EM receiver shows its robustness in blind equalization while achieving non-blind performance. Numerical electromagnetic simulations using finite difference time domain (FDTD) method under near ground penetrating situations with hidden targets are executed to illustrate the advantages of the proposed technique.","PeriodicalId":124475,"journal":{"name":"2006 International Radar Symposium","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122011067","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
Analysis and Real Time Implementation of a Clutter Map CFAR Detector with Noncoherent Integration 非相干积分杂波图CFAR检测器的分析与实时实现
2006 International Radar Symposium Pub Date : 2006-05-24 DOI: 10.1109/IRS.2006.4338107
M. Bencheikh, B. Magaz, M. Hamadouche, A. Belouchrani
{"title":"Analysis and Real Time Implementation of a Clutter Map CFAR Detector with Noncoherent Integration","authors":"M. Bencheikh, B. Magaz, M. Hamadouche, A. Belouchrani","doi":"10.1109/IRS.2006.4338107","DOIUrl":"https://doi.org/10.1109/IRS.2006.4338107","url":null,"abstract":"In this paper, we analysis a CMAP-CFAR (Clutter Map Constant False Alarm Rate) detector with noncoherent integration. The predetector statistics of the complex envelope are assumed Gaussian. A Swerling II target fluctuation model is considered and the incoming pulses are assumed independent. Closed form expressions of the probability of detection and the probability of false alarm are determined. On another hand, we propose a real time implementation of CMAP-CFAR detector with post integration using Texas Instrument DSP TMS320C4x.","PeriodicalId":124475,"journal":{"name":"2006 International Radar Symposium","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122098555","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
Pre-Crash Application for Multiple Target Situations 多目标情况下的预崩溃应用程序
2006 International Radar Symposium Pub Date : 2006-05-24 DOI: 10.1109/IRS.2006.4338085
S. Muller, H. Ritter, H. Rohling
{"title":"Pre-Crash Application for Multiple Target Situations","authors":"S. Muller, H. Ritter, H. Rohling","doi":"10.1109/IRS.2006.4338085","DOIUrl":"https://doi.org/10.1109/IRS.2006.4338085","url":null,"abstract":"In this paper a system model for an extended crash area is developed, which takes the maximum possible maneuvers and a reaction time of the driver into account simultaneously. The driver reaction time includes the current state of the steering wheel and the time needed to change from the throttle to the braking pedal. Advanced detection of crashes gives the opportunity to improve safety and to reduce serious consequences of the passengers. With decreasing driver reaction time the safety gain based on actuators can be improved. This concept finally offers a crash detection with an extended reaction time for the actuator.","PeriodicalId":124475,"journal":{"name":"2006 International Radar Symposium","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128513328","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
Static Nonswitchable Antenna Array for Ground-Based Noise Waveform SAR: a Novel Concept for SAR Imaging 基于地面噪声波形SAR的静态不可切换天线阵列:SAR成像的新概念
2006 International Radar Symposium Pub Date : 2006-05-24 DOI: 10.1109/IRS.2006.4338098
K. Lukin, A. Mogyla
{"title":"Static Nonswitchable Antenna Array for Ground-Based Noise Waveform SAR: a Novel Concept for SAR Imaging","authors":"K. Lukin, A. Mogyla","doi":"10.1109/IRS.2006.4338098","DOIUrl":"https://doi.org/10.1109/IRS.2006.4338098","url":null,"abstract":"A new method have been suggested and justified for SAR imaging using non-moving and no switching antenna array and decorrelation properties of noise (random) signals. We have shown that for separation of noise radar returns in a one channel correlation receiver and SAR image generation the radiators of the antenna array should be properly spaced and should have a microwave feeding circuit supplied with a time delay between the radiators that exceeds the decorrelation (coherence) time of noise radar signal. Attractive advantages of the suggested antenna array and method for SAR imaging with the help of noise waveform SAR consist in no need in either mechanical motion or electronic switching of the antenna array radiators, which simplify its design and low its cost. Preliminary theoretical consideration of NW-SAR based on the suggested antenna is presented. Advantages and constrains of such NW-SAR are briefly discussed.","PeriodicalId":124475,"journal":{"name":"2006 International Radar Symposium","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131983228","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
Improvement of the Performance of FM-CW Radar Systems by using Direct Digital Synthesizers: Comparison with Voltage Controlled Oscillators 利用直接数字合成器提高FM-CW雷达系统的性能:与压控振荡器的比较
2006 International Radar Symposium Pub Date : 2006-05-24 DOI: 10.1109/IRS.2006.4338068
J. F. Ventura, H. Russchenberg
{"title":"Improvement of the Performance of FM-CW Radar Systems by using Direct Digital Synthesizers: Comparison with Voltage Controlled Oscillators","authors":"J. F. Ventura, H. Russchenberg","doi":"10.1109/IRS.2006.4338068","DOIUrl":"https://doi.org/10.1109/IRS.2006.4338068","url":null,"abstract":"linear frequency modulated continuous wave (LFM-CW) radars require high linearity and good phase noise characteristics of its modulated signal to obtain a good resolution and sensitivity. Direct digital Synthesis (DDS) is becoming an increasingly competitive alternative to traditional Voltage Controlled Oscillators (VCO) to perform the modulation. Although there are plenty of publications describing the performance of the DDS, there has up to now not been any direct comparison between the performance of the DDS and the VCO as applied in FM-CW radars. In this paper the performance of DDS is analyzed both theoretically and with measurements. The performance of DDS in a linear frequency modulated continuous wave (LFM-CW) radar system, (the Transportable Atmospheric Radar TARA developed in IRCTR), is compared to a VCO demonstrating its superiority. DDS is, therefore, expected to play an important role in radar systems in the near future.","PeriodicalId":124475,"journal":{"name":"2006 International Radar Symposium","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128859936","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
Turbulence and Precipitation Classification based on Doppler-Polarimetric Radar Data 基于多普勒偏振雷达数据的湍流和降水分类
2006 International Radar Symposium Pub Date : 2006-05-24 DOI: 10.1109/IRS.2006.4338026
Y. Ostrovsky, F. Yanovsky, H. Rohling
{"title":"Turbulence and Precipitation Classification based on Doppler-Polarimetric Radar Data","authors":"Y. Ostrovsky, F. Yanovsky, H. Rohling","doi":"10.1109/IRS.2006.4338026","DOIUrl":"https://doi.org/10.1109/IRS.2006.4338026","url":null,"abstract":"This paper describes a methodology of precipitation and turbulence classification based on radar echo signal features measured by polarimetric radar. Estimation of turbulence parameters on the basis of Doppler spectrum width is used, but additionally some new polarimetric parameters and averaged velocity features are integrated into the classification procedure. After a detailed echo-signal analysis, a fuzzy logic classification procedure is applied. The classification procedure makes a decision about the type of both precipitation and turbulence intensity.","PeriodicalId":124475,"journal":{"name":"2006 International Radar Symposium","volume":"257 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115870935","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
An Adaptive Polarimetric SAR Speckle Filtering Algorithm Based on Unsupervised Classification 一种基于无监督分类的自适应极化SAR散斑滤波算法
2006 International Radar Symposium Pub Date : 2006-05-24 DOI: 10.1109/IRS.2006.4338135
Nan Sun, Bingchen Zhang, Yanfei Wang
{"title":"An Adaptive Polarimetric SAR Speckle Filtering Algorithm Based on Unsupervised Classification","authors":"Nan Sun, Bingchen Zhang, Yanfei Wang","doi":"10.1109/IRS.2006.4338135","DOIUrl":"https://doi.org/10.1109/IRS.2006.4338135","url":null,"abstract":"In this paper, a new approach is proposed for speckle reduction in full polarimetric SAR images. Being different from others, it adopts an enhanced unsupervised classification method to estimate the parameters of the speckle filter and thus an adaptive moving window is formed to better speckle reduction and preservation of texture information. . Experimental results demonstrate the effectiveness of this new filtering algorithm. Comparisons with other methods are also made.","PeriodicalId":124475,"journal":{"name":"2006 International Radar Symposium","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121012230","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
Phase Errors in Noise Waveform d-In-SAR due to Antenna Trajectory Distortions and Receiver Noise 天线轨迹畸变和接收机噪声对sar噪声波形相位误差的影响
2006 International Radar Symposium Pub Date : 2006-05-24 DOI: 10.1109/IRS.2006.4338088
P. Vyplavin
{"title":"Phase Errors in Noise Waveform d-In-SAR due to Antenna Trajectory Distortions and Receiver Noise","authors":"P. Vyplavin","doi":"10.1109/IRS.2006.4338088","DOIUrl":"https://doi.org/10.1109/IRS.2006.4338088","url":null,"abstract":"The work is dedicated to analysis of the phase errors in Noise Waveform SAR (NW-SAR) and their influence on the precision on the measurements made with the help of the differential SAR interferomety (d-InSAR) method. One of the promising applications of d-InSAR is monitoring of engineer constructions state with the help of ground based SAR systems. Precise repeatability of the antenna trajectory and high signal to noise (s/n) ratio are the key requirements of the method. The aim of the current work is to provide analysis of the phase errors in differential SAR interferometry caused by antenna distortions and s/n ratio of the SAR. For this purpose the analytical relations are used to describe the phase errors. The results included in the work are used in SAR Tx/Rx unit and scanning antenna design.","PeriodicalId":124475,"journal":{"name":"2006 International Radar Symposium","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121781064","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
Experimental Investigation of Chaotic Waveform Generator for Ultra Wide Band Noise Radar 超宽带噪声雷达混沌波形发生器实验研究
2006 International Radar Symposium Pub Date : 2006-05-24 DOI: 10.1109/IRS.2006.4338091
O. Zemlyaniy
{"title":"Experimental Investigation of Chaotic Waveform Generator for Ultra Wide Band Noise Radar","authors":"O. Zemlyaniy","doi":"10.1109/IRS.2006.4338091","DOIUrl":"https://doi.org/10.1109/IRS.2006.4338091","url":null,"abstract":"In this paper we present results of investigation of P-band chaotic waveform generator based on the nonlinear dynamical system with delayed feedback of ring structure. A module, which functionally realizes in general the asymmetric piecewise one-dimensional map is used as nonlinearity. Statistical and spectral properties of the chaotic oscillations in the system with delay have been studied experimentally, as well as a relationship between properties of output signal and parameters of nonlinear element was established.","PeriodicalId":124475,"journal":{"name":"2006 International Radar Symposium","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132779134","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
Bayesian Theory of the "Pareto-optimal" CFAR Detectors “帕累托最优”CFAR检测器的贝叶斯理论
2006 International Radar Symposium Pub Date : 2006-05-24 DOI: 10.1109/IRS.2006.4338006
Y. D. Shirman, V. Orlenko
{"title":"Bayesian Theory of the \"Pareto-optimal\" CFAR Detectors","authors":"Y. D. Shirman, V. Orlenko","doi":"10.1109/IRS.2006.4338006","DOIUrl":"https://doi.org/10.1109/IRS.2006.4338006","url":null,"abstract":"The method for optimizing adaptive CFAR detectors is proposed on the basis of using the a priory information about the interference variance. Possible applications of the method proposed are discussed.","PeriodicalId":124475,"journal":{"name":"2006 International Radar Symposium","volume":"222 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116162484","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
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