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2018 International Conference on Radar (RADAR)最新文献

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Estimation of NRCS of Oil-Free and Oil-Covered Sea Surfaces at L-Band. Assessment with UAVSAR Data l波段无油和有油海面NRCS的估算。利用UAVSAR数据进行评估
2018 International Conference on Radar (RADAR) Pub Date : 2018-08-01 DOI: 10.1109/RADAR.2018.8557298
Honglei Zheng, A. Khenchaf, Yunhua Wang, Ghanmi Helmi, Chaofang Zhao
{"title":"Estimation of NRCS of Oil-Free and Oil-Covered Sea Surfaces at L-Band. Assessment with UAVSAR Data","authors":"Honglei Zheng, A. Khenchaf, Yunhua Wang, Ghanmi Helmi, Chaofang Zhao","doi":"10.1109/RADAR.2018.8557298","DOIUrl":"https://doi.org/10.1109/RADAR.2018.8557298","url":null,"abstract":"This paper presents numerical simulations and analyses of EM (electromagnetic) scattering from oil-free and oil-covered sea surface. First, the influences caused by slicks on clean sea are studied and analyzed with the action balance function. Slicks on sea surface make significant impacts on the wind input, the nonlinear wave-wave interactions and the viscous dissipation. A damping model based on the action balance equation is introduced. And then, simulations are made by assuming the surface height spectra proposed by Elfouhaily et al. and Hwang, respectively. The two scale model (TSM) is used to calculate the normalized radar cross sections (NRCS) of oil-free and oil-covered sea surfaces. Additionally, an UAVSAR image which was collected during the Deep Water Horizon oil spill accident occurred in the Gulf of Mexico is served as a reference. The numerical comparisons between simulated results and measured data have shown that, for clean sea surface, the VV polarized NRCS simulated with Elfouhaily spectrum agree well with UA VSAR data, the HV polarized NRCS simulated with Hwang spectrum agree well with UA VSAR data. For polluted sea surface, the VV polarized NRCS simulated with Elfouhaily spectrum matches well with measured data. Overall, numerical simulations with Elfouhaily spectrum seem better than Hwang spectrum in our simulations.","PeriodicalId":187176,"journal":{"name":"2018 International Conference on Radar (RADAR)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126177711","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
Aspects of Delay-Doppler Filtering in OFDM Passive Radar OFDM无源雷达中延迟-多普勒滤波的几个方面
2018 International Conference on Radar (RADAR) Pub Date : 2018-08-01 DOI: 10.1109/RADAR.2018.8557292
S. Searle, Daniel Gustainis, Brendan Hennessy, Robert Young
{"title":"Aspects of Delay-Doppler Filtering in OFDM Passive Radar","authors":"S. Searle, Daniel Gustainis, Brendan Hennessy, Robert Young","doi":"10.1109/RADAR.2018.8557292","DOIUrl":"https://doi.org/10.1109/RADAR.2018.8557292","url":null,"abstract":"Delay-Doppler filtering enables the isolation of radar returns from a designated region of the ambiguity plane. Such returns can be cancelled from the surveillance signal, lowering the ambiguity floor and reducing demands on dynamic range. Modern passive radar systems frequently use OFDM-based illuminators of opportunity, and recent studies have demonstrated how the structure of OFDM signals can be exploited to perform delay-Doppler filtering in the frequency domain. In this study several aspects of one such algorithm are investigated: the ability to cancel returns when delay is not a whole number of samples; the ability to conserve computation by approximating a projection matrix; the effect of returns having delays exceeding the OFDM guard interval; and the application of the method to extended targets. The consideration of these aspects demonstrates the efficacy of the method in situations common to passive radar.","PeriodicalId":187176,"journal":{"name":"2018 International Conference on Radar (RADAR)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125084499","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
Space- Time-Range Adaptive Processing for MIMO Radar Imaging MIMO雷达成像的空间-时间范围自适应处理
2018 International Conference on Radar (RADAR) Pub Date : 2018-08-01 DOI: 10.1109/RADAR.2018.8557230
Baoxin Chen, Yong Huang, Xiaolong Chen, J. Guan
{"title":"Space- Time-Range Adaptive Processing for MIMO Radar Imaging","authors":"Baoxin Chen, Yong Huang, Xiaolong Chen, J. Guan","doi":"10.1109/RADAR.2018.8557230","DOIUrl":"https://doi.org/10.1109/RADAR.2018.8557230","url":null,"abstract":"Multiple-input multiple-output (MIMO) radar has drawn considerable attention due to its superior performance over phased array radar. The performance is achieved through waveform diversity. In terms of MIMO radar space-time adaptive processing (STAP), it is often assumed that the received signals has already been separated by a bank of matched filters (MFs) or the covariance matrix of the waveforms is an identity matrix. We find that when the non-complete orthogonality of the waveforms is taken into consideration, MIMO radar STAP suffers performance degradation. Besides, inspired by the definition of waveform diversity, a space-time-range adaptive processing (STRAP) scheme is proposed based on the framework of adaptive pulse compression (APC) and the criterion of minimum variance distortionless response (MVDR) to overcome the influence of non-completely orthogonal waveforms by taking into account the interference of nearby range cells to estimate the covariance matrix. The proposed algorithms are assessed via simulation experiments in two scenarios in comparison with sequential processing and the results show the effectiveness of STRAP.","PeriodicalId":187176,"journal":{"name":"2018 International Conference on Radar (RADAR)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121722834","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
Sensitivity Optimisation of Real-Time Adaptive Range-Doppler Processing in FM Passive Radar 调频无源雷达实时自适应距离-多普勒处理灵敏度优化
2018 International Conference on Radar (RADAR) Pub Date : 2018-08-01 DOI: 10.1109/RADAR.2018.8557294
J. Sendall, F. Maasdorp, C. Tong
{"title":"Sensitivity Optimisation of Real-Time Adaptive Range-Doppler Processing in FM Passive Radar","authors":"J. Sendall, F. Maasdorp, C. Tong","doi":"10.1109/RADAR.2018.8557294","DOIUrl":"https://doi.org/10.1109/RADAR.2018.8557294","url":null,"abstract":"This paper analyses the performance of adaptive processing algorithms, applied in the range-Doppler domain, for a frequency modulation (FM) based passive radar system, in terms of the processing efficiency, sensitivity and ultimately, detection performance. The algorithms are intended to be applied in a permanently installed passive-radar network and to this end, real-time signal processing considerations are also discussed. The processing methods are evaluated on a data set measured using the passive-radar network and the performance and shortcomings of each method are analysed. It is found that a hybrid Matching Pursuit (MP) method consistently produces the best results, while maintaining reasonable processing and memory requirements for the real-time processing chain. Using Orthogonal Matching Pursuit (OMP) resulted in highest overall probability of detection (Pd), 31 % higher (SNR increased by 11.8 dB) than a conventional matched filter.","PeriodicalId":187176,"journal":{"name":"2018 International Conference on Radar (RADAR)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128246579","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
Radar HRRP Group-Target Recognition Based on Combined Methods in the Backgroud of Sea Clutter 海杂波背景下基于组合方法的雷达HRRP群目标识别
2018 International Conference on Radar (RADAR) Pub Date : 2018-08-01 DOI: 10.1109/RADAR.2018.8557334
Liyang Zhu, Gang Xiong, Wenxian Yu
{"title":"Radar HRRP Group-Target Recognition Based on Combined Methods in the Backgroud of Sea Clutter","authors":"Liyang Zhu, Gang Xiong, Wenxian Yu","doi":"10.1109/RADAR.2018.8557334","DOIUrl":"https://doi.org/10.1109/RADAR.2018.8557334","url":null,"abstract":"In recent years, radar target recognition based on High-resolution range profile (HRRP) has received intensive attention. However, relevant researches mainly focus on HRRP single target recognition. In this paper, we study the problem of radar HRRP group-target recognition, especially when overlap and occlusion occur among the multiple targets in the group. The group-target recognition is designed as a two-stage process. The first is to classify the specific group-target or single target based on principal component analysis (PCA) dimension reduction method, back propagation (BP) neural network and support vector machine (SVM), the second is to recognize the specific targets contained in the group based on maximum correlation coefficient (MCC) method with sliding window. In the numerical simulation with both the Gaussian white noise and sea clutter background, we present maximum correlation coefficient result and the statistical recognition rate of specific targets in the group with respect to rotation angle.","PeriodicalId":187176,"journal":{"name":"2018 International Conference on Radar (RADAR)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116565866","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
Predicting Phased Array Radar Performance Through Modelling 通过建模预测相控阵雷达性能
2018 International Conference on Radar (RADAR) Pub Date : 2018-08-01 DOI: 10.1109/RADAR.2018.8557330
Honglei Chen, Rick Gentile, Rob Graessle, T. Roose, M. Gujrathi
{"title":"Predicting Phased Array Radar Performance Through Modelling","authors":"Honglei Chen, Rick Gentile, Rob Graessle, T. Roose, M. Gujrathi","doi":"10.1109/RADAR.2018.8557330","DOIUrl":"https://doi.org/10.1109/RADAR.2018.8557330","url":null,"abstract":"Modelling and simulation can reduce risk associated with complex radar system development because design choices can be validated before any hardware is developed. Models can also be used to accelerate algorithm development for existing radar systems. This paper describes the modelling results for two phased array radar designs: an MTI radar and a MIMO radar. These systems were modelled and then tested with radar data generated with commercially available radar hardware. The performance results for both models and the hardware-fed processing are analyzed and compared.","PeriodicalId":187176,"journal":{"name":"2018 International Conference on Radar (RADAR)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114627500","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
Phase Coded Waveforms with Optimal Peak-to-Sidelobe Ratio and Optimal Confined Bandwidth 具有最佳峰旁比和最佳受限带宽的相位编码波形
2018 International Conference on Radar (RADAR) Pub Date : 2018-08-01 DOI: 10.1109/RADAR.2018.8557315
Yunhan Dong
{"title":"Phase Coded Waveforms with Optimal Peak-to-Sidelobe Ratio and Optimal Confined Bandwidth","authors":"Yunhan Dong","doi":"10.1109/RADAR.2018.8557315","DOIUrl":"https://doi.org/10.1109/RADAR.2018.8557315","url":null,"abstract":"Among phase continuously and randomly coded waveforms it is shown that the quadriphase-coded (QPC) waveform has the best peak-to-sidelobe ratio (PSR). Hence a QPC waveform coded by a binary sequence with the minimum peak sidelobe level (PSL) results in a continuous phase modulated (CPM) waveform with the optimal PSR. To improve the spectrum of the original QPC waveform, the Gaussian minimum shift keying (GMSK) coding function is used to code the QPC waveform making the phase continuous and differentiable. In addition, a spectral optimisation model is proposed to further refine the GMSK-coded QPC waveform. The final product is a constrained-bandwidth constant-amplitude waveform whose phase profile is continuous, smooth and differentiable. It has optimal PSR and optimal spectrum which quite satisfies the criteria specified by the US National Telecommunications and Information Administration (NTIA).","PeriodicalId":187176,"journal":{"name":"2018 International Conference on Radar (RADAR)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133084810","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
Fast Direction-of-Arrival Estimation in Coprime Arrays 单素数阵列的快速到达方向估计
2018 International Conference on Radar (RADAR) Pub Date : 2018-08-01 DOI: 10.1109/RADAR.2018.8557304
William Baxter, E. Aboutanios
{"title":"Fast Direction-of-Arrival Estimation in Coprime Arrays","authors":"William Baxter, E. Aboutanios","doi":"10.1109/RADAR.2018.8557304","DOIUrl":"https://doi.org/10.1109/RADAR.2018.8557304","url":null,"abstract":"We present a fast direction-of-arrival (DOA) estimation algorithm for coprime array structures. In many practical applications of radar signals processing, reducing the redundancy inherent in linear arrays is advantageous. Arrays employing a coprime-pair configuration offer an increased number of degrees of freedom and permit the detection of more sources than sensors. Traditionally, this is achieved using conventional subspace-based methods. While these methods, such as MUltiple Signal Classification (MUSIC), are capable of high-resolution, the computational complexity of these algorithms is a significant hindrance to their practical implementation as the number of sensors increases. Furthermore, they must resort to spatial smoothing in order to calculate the covariance matrix. We, on the other hand, propose a fast iterative interpolated beamforming algorithm that has a computational complexity of the same order as the fast Fourier transform (FFT). The proposed approach is capable of delivering high fidelity DOA estimates that outperform the traditional high resolution methods. Simulation results demonstrate the DOA estimation performance of the technique.","PeriodicalId":187176,"journal":{"name":"2018 International Conference on Radar (RADAR)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114880718","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: 8
Study and Simulation of Radar Targets' Micro-Doppler Signature 雷达目标微多普勒特征的研究与仿真
2018 International Conference on Radar (RADAR) Pub Date : 2018-08-01 DOI: 10.1109/RADAR.2018.8557264
Reena Mamgain, Rashi Jain, D. Deb
{"title":"Study and Simulation of Radar Targets' Micro-Doppler Signature","authors":"Reena Mamgain, Rashi Jain, D. Deb","doi":"10.1109/RADAR.2018.8557264","DOIUrl":"https://doi.org/10.1109/RADAR.2018.8557264","url":null,"abstract":"Micro-Doppler signature of any radar target is induced due to back-scattering from rotational parts of engine compressor, exposed blades, turbine etc. The study of micro-Doppler signature aids in feature extraction based target recognition. To devise coarse target recognition scheme, it is necessary to study and model different types of aerial targets for micro-Doppler signature. In this paper, JET Engine Modulation(JEM), Helicopter Rotor Engine Modulation(HERM), propeller modulation is simulated for surveillance band radar using standard existing models. The simulated I/Q data is validated with some degree of closeness against real radar data. Doppler energy received for different types of targets varies with aspect, range and RCS. This energy is quantified at coarser level target recognition into different classes. Since the normal radar waveform for search and track function is used for this quantification, the radar computational resources are saved. The radar tracker kinematics, aspect angle and RCS is also used in conjunction with Doppler information to increase confidence of classification. Thereafter, specially designed NCTR waveform for feature extraction can be played for track with high confidence.","PeriodicalId":187176,"journal":{"name":"2018 International Conference on Radar (RADAR)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134006993","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
Colocated MIMO Radar Waveform Design Against Repeat Radar Jammers 针对重复雷达干扰的多输入多输出雷达波形设计
2018 International Conference on Radar (RADAR) Pub Date : 2018-08-01 DOI: 10.1109/RADAR.2018.8557305
Leilei Xu, Hongwei Liu, Shenghua Zhou, Jun Liu, Junkun Yan
{"title":"Colocated MIMO Radar Waveform Design Against Repeat Radar Jammers","authors":"Leilei Xu, Hongwei Liu, Shenghua Zhou, Jun Liu, Junkun Yan","doi":"10.1109/RADAR.2018.8557305","DOIUrl":"https://doi.org/10.1109/RADAR.2018.8557305","url":null,"abstract":"The digital radio frequency memory (DRFM) repeat jammer, which replicas the transmit signal and transmits back to radar receiver to create deceptive targets, is a cheap and quite destructive electronic attack. This paper concerns waveform design at the background of colocated multiple-input multiple-output (MIMO) radar to combat with the repeat jammers. Specifically, since the amplifiers of transmit circuits of repeat jammers often operate in the saturation mode, the repeat jamming signals should be constant modulus. However, for colocated MIMO radar, the synthetic angular waveform in space often is nonconstant modulus, which may have better performance in such environment. Under the assumption that hostile jammers operate in the saturation mode, we formulate a min-max design criterion that minimizes cross correlation between an angular waveform and a constant modulus waveform with the same phase terms. Numerical results validate the effectiveness of the proposed method.","PeriodicalId":187176,"journal":{"name":"2018 International Conference on Radar (RADAR)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124937728","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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