{"title":"Disturbance removal in passive radar via sliding extensive cancellation algorithm (ECA-S)","authors":"C. Palmarini, T. Martelli, F. Colone, P. Lombardo","doi":"10.1109/RADARCONF.2015.7411873","DOIUrl":"https://doi.org/10.1109/RADARCONF.2015.7411873","url":null,"abstract":"In this paper an advanced version of the Extensive Cancellation Algorithm (ECA) is proposed for robust disturbance cancellation and target detection in passive radar. Firstly some specific limitations of previous ECA versions are identified when dealing with a highly time-varying disturbance scenario in the presence of slowly moving targets. Specifically, the need to rapidly adapt the filter coefficients is shown to yield undesired effects on low Doppler target echoes, along with the expected partial cancellation. Therefore a sliding version of the ECA is presented which operates on partially overlapped signals batches. The proposed modification to the original ECA is shown to appropriately counteract the limitations above by taking advantage of a smooth estimate of the filter coefficients. The benefits of the proposed approach are demonstrated against experimental data sets accounting for quite different passive radar applications.","PeriodicalId":267194,"journal":{"name":"2015 IEEE Radar Conference","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117286595","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}
J. Cilliers, J. C. Smit, Christopher J. Baker, Karl Woodbridge
{"title":"On the information gain obtainable by exploitation of the monopulse difference channel for an X-band high range resolution radar evaluated using asymptotic EM techniques","authors":"J. Cilliers, J. C. Smit, Christopher J. Baker, Karl Woodbridge","doi":"10.1109/RADARCONF.2015.7411940","DOIUrl":"https://doi.org/10.1109/RADARCONF.2015.7411940","url":null,"abstract":"This paper addresses the prediction of the maximum gain in recognition performance of a High Range Resolution (HRR) X-band radar when use is made of the monopulse difference channel to obtain extra information about the target being tracked. The study was conducted for the F-14 as a target and the azimuth difference channel as the extra signal. Use is made of the information theoretic concept of mutual information (MI) to estimate the gain in information by exploitation of the extra signal available in a monopulse radar. Returns from the target were simulated using an asymptotic RCS prediction code. The information content of the sum channel only is compared to the information content of the sum and difference channel signal for VV and HH polarized antennas.","PeriodicalId":267194,"journal":{"name":"2015 IEEE Radar Conference","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115058501","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}
M. Ritchie, F. Fioranelli, H. Griffiths, Borge Torvik
{"title":"Micro-drone RCS analysis","authors":"M. Ritchie, F. Fioranelli, H. Griffiths, Borge Torvik","doi":"10.1109/RADARCONF.2015.7411926","DOIUrl":"https://doi.org/10.1109/RADARCONF.2015.7411926","url":null,"abstract":"This paper presents both simulation and experimental results of micro-drone rotor blade electromagnetic scattering. The focus of this work is investigating the variation of these reflections as a function of variables such as polarization, frequency and azimuth angle. The simulation results clearly show a strong variation in scattering with azimuth and frequency. Experimental validation of these variations was investigated and similar trends in azimuth were found. The Doppler components from an operational micro-drone in varying polarizations are shown, these demonstrate the expected signals received by a real radar system.","PeriodicalId":267194,"journal":{"name":"2015 IEEE Radar Conference","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123045677","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}
{"title":"Multi-perspective high range resolution profiles of landmines","authors":"L. Wright, A. Balleri, H. Griffiths, F. Lombardi","doi":"10.1109/RADARCONF.2015.7411853","DOIUrl":"https://doi.org/10.1109/RADARCONF.2015.7411853","url":null,"abstract":"Landmine clearance is a severe and unresolved humanitarian issue. The development of low-cost, smaller, faster and lighter Ground Penetrating Radars (GPR), which can be mounted on unmanned platforms, will allow faster and safer 24/7 operations. This technology will make it possible to survey affected areas with more flexible trajectories and these will provide measurements of landmine signatures from many different aspect angles. As a result, multi-perspective information over wide angular windows and the behaviour of the signature as a function of the angle of illumination can be exploited. Landmine signatures are expected to present features that are less sensitive to the angle of illumination with respect to those of common cluttered objects, and this can lead to an improvement in detection and discrimination performance. In this paper, we present the results of an experimental trial carried out to collect the High Range Resolution Profiles (HRRPs) of two landmines, the SB-33 and the VS-50, off the ground. An analysis of the auto-correlation function of each range bin as a function of the aspect angle is presented together with that of the cross-correlation between profiles collected from different aspect angles.","PeriodicalId":267194,"journal":{"name":"2015 IEEE Radar Conference","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127259248","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}
M. Inggs, S. Coetzee, H. Griffiths, F. Fioranelli, M. Ritchie, K. Woodbridge
{"title":"Database design for an experimental, dual band, polarimetric radar","authors":"M. Inggs, S. Coetzee, H. Griffiths, F. Fioranelli, M. Ritchie, K. Woodbridge","doi":"10.1109/RADARCONF.2015.7411919","DOIUrl":"https://doi.org/10.1109/RADARCONF.2015.7411919","url":null,"abstract":"Multistatic measurements of targets and clutter have been performed over the past few years by the NetRAD system developed at the University College London and the University of Cape Town. A new system, NeXtRAD, is now being developed in order to investigate some of the many aspects of multistatic radar at L and X Bands, dual polarised. This paper discusses the data archive system of the new radar in the light of the lessons learnt from the use of NetRAD. Although this data can be conveniently grouped by day, within campaigns, it is highly desirable to be able to search for specific recording conditions, across many data takes. In addition, to assist investigators during post processing, a library of routines to access the data have been prepared. The radar raw target returns, together with ancillary data, is merged into an Hierarchical Data File version 5 (HDF5) archive. During this process, important parameters are extracted to a searchable database.","PeriodicalId":267194,"journal":{"name":"2015 IEEE Radar Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125397962","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}