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W-band maritime target classification using high resolution range profiles 使用高分辨率距离像的w波段海上目标分类
2013 International Conference on Radar Pub Date : 2013-11-04 DOI: 10.1109/RADAR.2013.6652013
T. Jasiński, I. Antipov, S. Monteiro, G. Brooker
{"title":"W-band maritime target classification using high resolution range profiles","authors":"T. Jasiński, I. Antipov, S. Monteiro, G. Brooker","doi":"10.1109/RADAR.2013.6652013","DOIUrl":"https://doi.org/10.1109/RADAR.2013.6652013","url":null,"abstract":"A W-band radar model was developed and tested using six point-scatterer maritime targets to assess the performance of four classifiers: traditional maximum correlation, naïve Bayes, polynomial kernel support vector machine (SVM) and radial basis function (RBF) SVM. W-band is characterized by scintillations caused by subtle aspect and range changes, making classification potentially problematic. High resolution range profiles (HRRPs) were used as the feature vectors with minimal pre-processing. Training and test datasets were generated by rotating the targets in the azimuth plane. A receiver operating characteristic (ROC) analysis was conducted, as well as precision, recall, and accuracy measures derived, and confusion matrices obtained for each classifier under a specific operating point. It was found that the traditional correlation approach performed best under the given circumstances, closely followed by the two SVM approaches and naïve Bayes. It was also found that different classifiers were better suited to classifying particular targets.","PeriodicalId":365285,"journal":{"name":"2013 International Conference on Radar","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115591236","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
The ONERA airborne multi-frequency SAR imaging systems ONERA机载多频SAR成像系统
2013 International Conference on Radar Pub Date : 2013-11-04 DOI: 10.1109/RADAR.2013.6651965
O. Ruault du Plessis, P. Dreuillet
{"title":"The ONERA airborne multi-frequency SAR imaging systems","authors":"O. Ruault du Plessis, P. Dreuillet","doi":"10.1109/RADAR.2013.6651965","DOIUrl":"https://doi.org/10.1109/RADAR.2013.6651965","url":null,"abstract":"RAMSES-NG and SETHI, the airborne SAR systems developed by ONERA, integrate new generation of radar and optronics payloads. They can operate over a wide range of frequency bands from UHF-VHF, to X-band including L band with long range, very high resolution, polarimetric and interferometric capabilities. Collected and processed Data are exploited for various studies in the field of Defence, Security and Remote sensing applications. In this paper, we describe these two SAR Systems and associated digital remote control. In conclusion some typical results are presented.","PeriodicalId":365285,"journal":{"name":"2013 International Conference on Radar","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122427385","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
Automatic robust adaptive beamforming via ridge regression using l1-norm approximation 采用1.1范数近似的脊回归自动鲁棒自适应波束形成
2013 International Conference on Radar Pub Date : 2013-11-04 DOI: 10.1109/RADAR.2013.6652018
Mei Dong, Q. Zheng, Hongtao Su
{"title":"Automatic robust adaptive beamforming via ridge regression using l1-norm approximation","authors":"Mei Dong, Q. Zheng, Hongtao Su","doi":"10.1109/RADAR.2013.6652018","DOIUrl":"https://doi.org/10.1109/RADAR.2013.6652018","url":null,"abstract":"In this paper the l1-norm approximation, used to measure the noise level in the generalized sidelobe canceler reparameterization of the standard Capon beamformer, is adopted in the ridge regression problem to compute the DL level. The enhanced covariance matrix obtained by the new DL approach becomes less noise sensitive and more robust in small snapshot size. The performance improvement of the proposed approach over the current robust adaptive beamforming techniques developed is confirmed by simulation results.","PeriodicalId":365285,"journal":{"name":"2013 International Conference on Radar","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122088709","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
Over-the-horizon Ka band radio wave propagation studies in the coastal South Australian Spencer Gulf region 南澳大利亚斯宾塞湾沿岸地区超视距Ka波段无线电波传播研究
2013 International Conference on Radar Pub Date : 2013-11-04 DOI: 10.1109/RADAR.2013.6651962
H. Hansen, A. Kulessa, W. Marwood, M. Forrest, O. Reinhold
{"title":"Over-the-horizon Ka band radio wave propagation studies in the coastal South Australian Spencer Gulf region","authors":"H. Hansen, A. Kulessa, W. Marwood, M. Forrest, O. Reinhold","doi":"10.1109/RADAR.2013.6651962","DOIUrl":"https://doi.org/10.1109/RADAR.2013.6651962","url":null,"abstract":"Anomalous propagation of microwave and mmW (millimetre Wave) radiation in the surface boundary layer due to the changing gradients in the refractivity height profile surface can significantly enhance, or degrade, the performance of mmW radio receiver systems. Although propagation under anomalous conditions has been modeled, the dependence of accurate refractivity profiling on pressure temperature and moisture means that the validation of models relies on coordinating measurement of these parameters with tropospheric radio link and radar experiments. A height-distributed multi-element transmit-receive 35 GHz CW carrier radio link over 26 km has been built and operated in trials in the Spencer Gulf concurrently with atmospheric refractivity profiling instrumentation that provides a full description of the tropospheric conditions over the air/sea interface. This paper describes an analysis of received signal strengths associated with a low-height evaporative ducting structure that was present during a daytime recording period. Modeling of the observed reception has been conducted with a parabolic equation approach. Radio wave reception measurements at heights above the sea surface ducting structure are consistent with the presence of a stable refractivity profile.","PeriodicalId":365285,"journal":{"name":"2013 International Conference on Radar","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128234459","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
High power coherent-on-receive radar for marine surveillance 用于海上监视的高功率相干接收雷达
2013 International Conference on Radar Pub Date : 2013-11-04 DOI: 10.1109/RADAR.2013.6652028
G. E. Smith, N. Majurec, A. O'Brien, J. Pozderac, C. Baker, J. Johnson, D. Lyzenga, O. Nwogu, D. Trizna, D. Rudolf, G. Schueller
{"title":"High power coherent-on-receive radar for marine surveillance","authors":"G. E. Smith, N. Majurec, A. O'Brien, J. Pozderac, C. Baker, J. Johnson, D. Lyzenga, O. Nwogu, D. Trizna, D. Rudolf, G. Schueller","doi":"10.1109/RADAR.2013.6652028","DOIUrl":"https://doi.org/10.1109/RADAR.2013.6652028","url":null,"abstract":"In this paper we describe the development of a low cost, high power coherent-on-receiver radar. The unit has a 25kW peak transmit power and is capable of accurately measuring velocity as well as range. The design of the radar is optimized for marine surveillance, although the techniques developed have general application. The radar system is validated through a series of tests that culminate with sea surface measurements.","PeriodicalId":365285,"journal":{"name":"2013 International Conference on Radar","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129923976","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: 12
Near-earth RF propagation - Path loss and variation with weather 近地射频传播。路径损耗和随天气变化
2013 International Conference on Radar Pub Date : 2013-11-04 DOI: 10.1109/RADAR.2013.6651960
A. Larsson, A. Piotrowski, Timothy Giles, D. Smart
{"title":"Near-earth RF propagation - Path loss and variation with weather","authors":"A. Larsson, A. Piotrowski, Timothy Giles, D. Smart","doi":"10.1109/RADAR.2013.6651960","DOIUrl":"https://doi.org/10.1109/RADAR.2013.6651960","url":null,"abstract":"Most of the current radio frequency propagation analysis is focused on signals travelling well above the earth's surface. A recent surge in low power communication networks having RF signals propagating close to the earth's surface has resulted in some networks using antennas operating at heights less than one metre from the surface. The resultant near ground RF propagation and the effect of obstructions that impinge upon the first Fresnel zone for short ranges is not well understood. It is unclear as to which propagation model to apply in this situation. Knowledge of the propagation conditions is essential to the design of radio communications for distributed radars such as those used for perimeter protection. DSTO is investigating RF propagation and evaluating the effects of weather for these propagation conditions. Propagation loss measurements were made at UHF frequencies using antennas set at heights varying between 0.3 m and 1.5 m in rural line of sight environments. Measured RF propagation loss results for these conditions are in very good agreement with the two-ray RF propagation model. In addition, the dew and cloud coverage can significantly affect the RF propagation loss.","PeriodicalId":365285,"journal":{"name":"2013 International Conference on Radar","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130566647","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
Commensal radar: Range-Doppler processing using a recursive DFT 共频雷达:使用递归DFT的距离-多普勒处理
2013 International Conference on Radar Pub Date : 2013-11-04 DOI: 10.1109/RADAR.2013.6652001
M. Inggs, A. van der Byl, C. Tong
{"title":"Commensal radar: Range-Doppler processing using a recursive DFT","authors":"M. Inggs, A. van der Byl, C. Tong","doi":"10.1109/RADAR.2013.6652001","DOIUrl":"https://doi.org/10.1109/RADAR.2013.6652001","url":null,"abstract":"Commensal radar [1] is an attractive solution to low-cost air-traffic surveillance. This paper proposes an alternative approach using a recursive Fourier transform for Doppler processing for computing amplitude-range-Doppler (ARD) data. At present, the full FFT is utilsed, however, at the cost of unnecessary channel decomposition, excess memory, and high-overhead for the required sampling window lasting 1-4s. This work proposes the use of a recursive Fourier technique which allows select channels to be computed, introduces significant memory savings, and offers very fine time frequency decomposition.","PeriodicalId":365285,"journal":{"name":"2013 International Conference on Radar","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124220403","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
Rainfall studies using co-located VHF and UHF wind profiling radars 使用同一位置的甚高频和超高频风廓线雷达进行降雨研究
2013 International Conference on Radar Pub Date : 2013-11-04 DOI: 10.1109/RADAR.2013.6652005
B. Dolman, I. Reid
{"title":"Rainfall studies using co-located VHF and UHF wind profiling radars","authors":"B. Dolman, I. Reid","doi":"10.1109/RADAR.2013.6652005","DOIUrl":"https://doi.org/10.1109/RADAR.2013.6652005","url":null,"abstract":"Quantifying rainfall rates using radar is critical to modern meteorology, typically achieved through measuring reflectivity with a scanning weather radar, and converting to rainrate via an empirical relationship. Wind profiling radars are capable of retrieving additional rainfall information, and can thus provide superior estimates at their location. This paper discusses the use of two VHF and one UHF wind profiler for such studies.","PeriodicalId":365285,"journal":{"name":"2013 International Conference on Radar","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134540760","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
Approaching 80 years of passive radar 接近80年的无源雷达
2013 International Conference on Radar Pub Date : 2013-11-04 DOI: 10.1109/RADAR.2013.6651987
H. Kuschel
{"title":"Approaching 80 years of passive radar","authors":"H. Kuschel","doi":"10.1109/RADAR.2013.6651987","DOIUrl":"https://doi.org/10.1109/RADAR.2013.6651987","url":null,"abstract":"The history of passive radar dates back to the early days of radar in 1935 when the Daventry experiment was conducted in the UK. It continues in WW II with the German Klein Heidelberg passive radar and receives new interest today, as passive covert radar (PCR) systems like Silent Sentry, Homeland Alerter 100, Aulos and PARADE are ready for operation. The future of PCR will strongly depend on the availability of transmitters of opportunity such as FM-radio and digital broadcast networks.","PeriodicalId":365285,"journal":{"name":"2013 International Conference on Radar","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131582988","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: 46
Covariance matrix transforming based moving jammers suppression method 基于协方差矩阵变换的移动干扰抑制方法
2013 International Conference on Radar Pub Date : 2013-11-04 DOI: 10.1109/RADAR.2013.6651984
Jingwei Xu, Yanhong Xu, G. Liao, Shengqi Zhu, Zi-jing Zhang
{"title":"Covariance matrix transforming based moving jammers suppression method","authors":"Jingwei Xu, Yanhong Xu, G. Liao, Shengqi Zhu, Zi-jing Zhang","doi":"10.1109/RADAR.2013.6651984","DOIUrl":"https://doi.org/10.1109/RADAR.2013.6651984","url":null,"abstract":"In this paper, an adaptive moving jammers suppression method based on covariance matrix transforming is proposed. According to the knowledge of parameters of the jammers, we construct a transform matrix thus the covariance matrix could be forecasted through iteratively matrix transforming. This method will save many computation resources and ensure the application of adaptive beamforming in large-scale arrays. Simulation results demonstrate the effectiveness of the proposed method.","PeriodicalId":365285,"journal":{"name":"2013 International Conference on Radar","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115711801","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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