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2019 20th International Radar Symposium (IRS)最新文献

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Frequency Monitoring System for Over-The-Horizon Radar (OTHR) using The Empirical Canadian High Arctic Ionospheric Model (E-CHAIM) 基于加拿大高北极电离层模式(E-CHAIM)的超视距雷达(OTHR)频率监测系统
2019 20th International Radar Symposium (IRS) Pub Date : 2019-06-01 DOI: 10.23919/IRS.2019.8768141
T. Thayaparan, A. Kelsall, Justin Marchioni, R. Riddolls
{"title":"Frequency Monitoring System for Over-The-Horizon Radar (OTHR) using The Empirical Canadian High Arctic Ionospheric Model (E-CHAIM)","authors":"T. Thayaparan, A. Kelsall, Justin Marchioni, R. Riddolls","doi":"10.23919/IRS.2019.8768141","DOIUrl":"https://doi.org/10.23919/IRS.2019.8768141","url":null,"abstract":"The Canadian Department of National Defence (DND) is developing an experimental over-the-horizon radar (OTHR) with the potential for surveillance of Canada. Because of dynamically changing ionospheric conditions in the high-latitude and polar regions, the operating OTHR transmission frequency and elevation angle needs to be adjusted regularly to maintain constant illumination of targets downrange. In this regard, accurate electron density is necessary for the purpose of improving operational OTHR and OTHR planning/design. Recently, the first phase of the Empirical Canadian High Arctic Ionospheric Model (E-CHAIM) was released, which was funded under Defence Research & Development Canada’s (DRDC) All Domain Situational Awareness (ADSA) program. In this study, E-CHAIM is used to determine feasible radar parameters such as operating frequencies and elevation angles using a three-dimensional ray-tracing technique, which will help to form the basis of the frequency monitoring systems (FMS) that will control these polar OTHR systems.","PeriodicalId":155427,"journal":{"name":"2019 20th International Radar Symposium (IRS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128783703","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
Direction Finding and Signal Characterization of Unknown Emitters 未知辐射源的测向与信号表征
2019 20th International Radar Symposium (IRS) Pub Date : 2019-06-01 DOI: 10.23919/IRS.2019.8768164
F. Fois, C. Stolk, R. Heiden
{"title":"Direction Finding and Signal Characterization of Unknown Emitters","authors":"F. Fois, C. Stolk, R. Heiden","doi":"10.23919/IRS.2019.8768164","DOIUrl":"https://doi.org/10.23919/IRS.2019.8768164","url":null,"abstract":"Under guidance of the NATO HQ C3 Staff and NATO Capability Panel 2 (CaP2) on Navigation and Identification, an experimental prototype of a GPS jammer direction finding and signal classification system was constructed using Software Defined Radio technology. The system is based on phased array processing of signals from a 6-element uniform linear antenna array, sampled with a multi-channel phase coherent Radio Frequency receiver. The prototype system was tested against realistic jammers and spoofers and demonstrated to have an accuracy of 2 degrees and a resolution around 10 degrees using the MUSIC algorithm. Signal classification features were proven to be very useful tools to support the operator in assessment of the jamming and spoofing situations. This report describes the design, implementation and extensive test results.","PeriodicalId":155427,"journal":{"name":"2019 20th International Radar Symposium (IRS)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128818334","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
DFT-Spread OFDM MIMO-Radar – An Alternative for Reduced Crest Factors DFT-Spread OFDM MIMO-Radar -一种降低波峰因子的替代方案
2019 20th International Radar Symposium (IRS) Pub Date : 2019-06-01 DOI: 10.23919/IRS.2019.8767457
J. Mietzner
{"title":"DFT-Spread OFDM MIMO-Radar – An Alternative for Reduced Crest Factors","authors":"J. Mietzner","doi":"10.23919/IRS.2019.8767457","DOIUrl":"https://doi.org/10.23919/IRS.2019.8767457","url":null,"abstract":"Multiple-input multiple-output radar has been recognized as an interesting option for near- to medium-range radar applications, since its virtual antenna array concept offers increased angular resolutions at a compact installation size. Orthogonal frequency-division multiplexing (OFDM) – which is widely employed in wireless communications – has been shown to provide an efficient means to establish the required orthogonal transmit signals. Despite its many advantages, a well-known drawback of OFDM is that transmit signals are typically characterized by relatively high crest factors. This requires corresponding power back-offs at the transmitter side or power amplifiers with highly linear characteristics, so as to avoid undesired signal distortions. In this paper, we propose an alternative OFDM-based waveform adopted from wireless communication systems, which employs a pre-spreading stage by means of a discrete Fourier transform (DFT). By means of computer simulation results, we show that DFT-spread OFDM has similar radar properties as OFDM, while crest factors can be reduced considerably. This renders DFT-spread OFDM a particularly “hardware-friendly” modulation scheme.","PeriodicalId":155427,"journal":{"name":"2019 20th International Radar Symposium (IRS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122920398","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
Detection and classification Real-Time of Fall Events from the Daily Activities of Human Using Forward Scattering Radar 利用前向散射雷达实时探测和分类人类日常活动中的坠落事件
2019 20th International Radar Symposium (IRS) Pub Date : 2019-06-01 DOI: 10.23919/IRS.2019.8768130
A. Alnaeb, R. Abdullah, A. Salah, A. Sali, N. E. Rashid, I. Pasya
{"title":"Detection and classification Real-Time of Fall Events from the Daily Activities of Human Using Forward Scattering Radar","authors":"A. Alnaeb, R. Abdullah, A. Salah, A. Sali, N. E. Rashid, I. Pasya","doi":"10.23919/IRS.2019.8768130","DOIUrl":"https://doi.org/10.23919/IRS.2019.8768130","url":null,"abstract":"Detection and identification of various human activities that have concurrently performed by two individuals or more is a crucial task of elderly assisted living systems. Fall is the biggest problem which may threaten the older people’s life aged 65 and above, therefore, the real-time detection of human activities and classification of fall events is required whether in their houses or in the health care institutions. This paper presents a Forward Scattering Radar as a monitoring sensor for the real-time categorizing features of falls from the non-fall activities. The spectrogram representations are utilized for analyzing motion characteristics, while, based on the short-time Fourier transform features, the support vector machine has been used for classification operations.An indoor experiment was carried out to emulate the sitting on a chair of the older and forward falling down event, where 50 trials were fulfilled by 5 adults for each activity. The analysis results indicated that the Forward Scattering Radar has a pretty good ability in detecting of the daily activities and classification of fall from the different overlapping activities. The preliminary classification results have revealed a noticeable classification performance of the fall event when the two activities, the forward falling and sitting on a chair, are happened simultaneously.","PeriodicalId":155427,"journal":{"name":"2019 20th International Radar Symposium (IRS)","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124574570","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
Towards Cognitive Radar via Knowledge Aided Processing for Airborne and Ground based Radar Applications 基于知识辅助处理的认知雷达在机载和地面雷达中的应用
2019 20th International Radar Symposium (IRS) Pub Date : 2019-06-01 DOI: 10.23919/IRS.2019.8768133
M. Brandfass, J. Meyer-Hilberg, A. Dallinger, Holger Appel
{"title":"Towards Cognitive Radar via Knowledge Aided Processing for Airborne and Ground based Radar Applications","authors":"M. Brandfass, J. Meyer-Hilberg, A. Dallinger, Holger Appel","doi":"10.23919/IRS.2019.8768133","DOIUrl":"https://doi.org/10.23919/IRS.2019.8768133","url":null,"abstract":"The operational benefits of fully adaptive and Knowledge Aided (KA) processing approaches are discussed for airborne as well as for ground based Radar applications. The advantages of combining different a priori, prior internal and external information from Digital Elevation Models and sources such as Open Street Map are pointed out and demonstrated with real data acquired from Hensoldt’s Air Traffic Control Radar ASR. Real-time Space Time Adaptive Processing (STAP) effects on clutter inhomogeneities are presented on data acquired from Hensoldt’s Air-to-Ground SmartRadar AESA Pod system and how to mitigate them via KA-STAP approaches. The necessities of software defined Radar as provided by Hensoldt’s new ISR Radar family PrecISR™ along with KA resource management are outlined as prerequisites towards cognitive Radar.","PeriodicalId":155427,"journal":{"name":"2019 20th International Radar Symposium (IRS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132162082","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
Along-track bistatic Low Frequency UWB SAR Experiment 沿航迹双基地低频超宽带SAR实验
2019 20th International Radar Symposium (IRS) Pub Date : 2019-06-01 DOI: 10.23919/IRS.2019.8768119
Hongtu Xie, Jun Hu, K. Duan, Zengping Chen, Shiyou Xu, Nannan Zhu, Bin Xi, Yiquan Lin, D. An, Guoqian Wang
{"title":"Along-track bistatic Low Frequency UWB SAR Experiment","authors":"Hongtu Xie, Jun Hu, K. Duan, Zengping Chen, Shiyou Xu, Nannan Zhu, Bin Xi, Yiquan Lin, D. An, Guoqian Wang","doi":"10.23919/IRS.2019.8768119","DOIUrl":"https://doi.org/10.23919/IRS.2019.8768119","url":null,"abstract":"The bistatic low frequency ultrawideband synthetic aperture radar (LF UWB SAR) has the well penetrating ability, high-resolution imaging as well as providing the increased information. In this paper, an along-track bistatic LF UWB SAR experiment and result are proposed. In August 2015, an along-track bistatic LF UWB SAR imaging experiment was carried out, and the raw data was collected. In this bistatic SAR system, the transmitter and receiver are both carried by a vehicle and separated by an invariable distance. The object was to investigate the imaging property of the bistatic LF UWB SAR system. Bistatic image was obtained using the subaperture spectrum-equilibrium method integrated with the fast factorized back projection (FFBP) algorithm. Experiment results are show to prove the validity of the bistatic LF UWB SAR experiment.","PeriodicalId":155427,"journal":{"name":"2019 20th International Radar Symposium (IRS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132301735","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
Minimum Sample Quasi Maximum Likelihood Estimator 最小样本拟极大似然估计
2019 20th International Radar Symposium (IRS) Pub Date : 2019-06-01 DOI: 10.23919/IRS.2019.8768168
A. Dallil, A. Ouldali
{"title":"Minimum Sample Quasi Maximum Likelihood Estimator","authors":"A. Dallil, A. Ouldali","doi":"10.23919/IRS.2019.8768168","DOIUrl":"https://doi.org/10.23919/IRS.2019.8768168","url":null,"abstract":"The quasi-maximum likelihood estimator used instantaneous frequency estimates based on short time Fourier transform for polynomial phase signal parameter estimation. In this work, we are interesting in the selection of minimum number of the best instantaneous frequency estimates to use them for polynomial interpolation in the quasi-maximum likelihood estimator. Simulation results show that judicious choice of instantaneous frequency estimates improves impressively the estimator performances.","PeriodicalId":155427,"journal":{"name":"2019 20th International Radar Symposium (IRS)","volume":"15 Sect Study Dis Child 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123406042","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
Consideration of Future Broadcast Waveforms LTE FeMBMS and DVB-SH for Passive Radar 无源雷达对未来广播波形LTE FeMBMS和DVB-SH的考虑
2019 20th International Radar Symposium (IRS) Pub Date : 2019-06-01 DOI: 10.23919/IRS.2019.8768174
Clemens Klöck, Fabienne Hoffmann, S. Lutz
{"title":"Consideration of Future Broadcast Waveforms LTE FeMBMS and DVB-SH for Passive Radar","authors":"Clemens Klöck, Fabienne Hoffmann, S. Lutz","doi":"10.23919/IRS.2019.8768174","DOIUrl":"https://doi.org/10.23919/IRS.2019.8768174","url":null,"abstract":"Several countries discuss about switching off the established broadcasts like FM and DVB-T. Thus, it is necessary to think about future waveforms, which could replace these transmitters of opportunity for passive radar. In this paper two candidates (DVB-SH and LTE-FeMBMS) are discussed for passive radar usage with focus on air surveillance.","PeriodicalId":155427,"journal":{"name":"2019 20th International Radar Symposium (IRS)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115881156","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
Enhanced Interference Detection Method in Automotive FMCW Radar Systems 汽车FMCW雷达系统中的增强干扰检测方法
2019 20th International Radar Symposium (IRS) Pub Date : 2019-06-01 DOI: 10.23919/IRS.2019.8767459
F. Laghezza, F. Jansen, J. Overdevest
{"title":"Enhanced Interference Detection Method in Automotive FMCW Radar Systems","authors":"F. Laghezza, F. Jansen, J. Overdevest","doi":"10.23919/IRS.2019.8767459","DOIUrl":"https://doi.org/10.23919/IRS.2019.8767459","url":null,"abstract":"In the coming years, automotive radar sensors will play a crucial role in the autonomous driving tasks. A future challenge to be addressed is represented by the potential radar to radar interference. Frequency Modulated Continuous Wave (FMCW) radar to radar interference can cause severe dynamic range penalties in the radar receiver which lead to a reduction of maximum detectable range as well as sensitivity losses. State of the art FMCW to FMCW radar interference detection techniques are prone to miss weak interference. Though weak, this interference can still decrease sensitivity. A high pass filter can be applied before the first stage of range processing to reduce the contribution of the close and strong reflectors in the interference detection process. By applying this filter, the return from close targets can be suppressed to a certain extent, preferably below the noise floor, such that only the interference can be effectively considered in the interference detection process. This allows the detection of interference with a lower power than the return from the close targets.","PeriodicalId":155427,"journal":{"name":"2019 20th International Radar Symposium (IRS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114616330","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
Hybrid Algorithm for Small Doppler Shifts Evaluation 小多普勒频移评价的混合算法
2019 20th International Radar Symposium (IRS) Pub Date : 2019-06-01 DOI: 10.23919/IRS.2019.8768158
M. Oravec, V. Navrátil, F. Vejražka
{"title":"Hybrid Algorithm for Small Doppler Shifts Evaluation","authors":"M. Oravec, V. Navrátil, F. Vejražka","doi":"10.23919/IRS.2019.8768158","DOIUrl":"https://doi.org/10.23919/IRS.2019.8768158","url":null,"abstract":"Improving performance of Doppler shift evaluation could be generally attempted by enhancement of hardware or software. The costly and inflexible nature of the former motivates us to gather as much as possible from the signal processing. The aim of our research has been to develop a real-time algorithm improving precision of Doppler shift evaluation for a standard, low-cost CW (continuous wave) Doppler radar. Emphasis has been put on close-to-zero Doppler shifts (i.e. low velocities), where standard algorithms usually do not provide accurate and reliable results. The proposed algorithm uses simple neural networks in order to provide the approximate estimate of the Doppler shift. According to their results, a proper processing method is chosen for the evaluation of the accurate Doppler shift value.","PeriodicalId":155427,"journal":{"name":"2019 20th International Radar Symposium (IRS)","volume":"1 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116676469","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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