Author:De Witt, JJ; Alahmadi, MS; Alzamil, ADate:Oct 2012High range resolution (HRR) radar measurements can provide important feature information when performing non-cooperative target recognition. This paper presents a joint development of a mobile, X-band, HRR research radar facility, by the ...Read more
Author:Abdul Gaffar, MY; Nel, Willem AJDate:Oct 2007ISAR imaging has potential in assisting with the classification of non-cooperative targets. Blurred ISAR imagery may however lead to misleading classification results. Much research has been done to understand some of the causes of distortion ...Read more
Author:Lord, RT; Nel, Willem AJ; Abdul Gaffar, MYDate:May 2006Conventional Inverse Synthetic Aperture Radar (ISAR) utilises the rotational motion of a target such as a ship or an aircraft to obtain a 2-D image of the target’s radar cross section (RCS) profile from a coherent radar system. This concept ...Read more
Author:Kathree, U; Nel, Willem AJ; Van Rensburg, VJ; Mishra, AKDate:Oct 2015In the field of radar, High Range Resolution (HRR) profiles are often used to improve target tracking accuracy in range and to allow the radar system to produce an image of an object using techniques such as inverse synthetic aperture radar ...Read more
Author:Wazna, TM; Balamesh, AS; Abdul Gaffar, MYDate:Oct 2015In Inverse Synthetic Aperture Radar (ISAR) imaging, the Range Instantaneous Doppler (RID) method is used to compensate for the nonuniform rotational motion of the target that degrades the Doppler resolution of the ISAR image. The Instantaneous ...Read more
Author:De Freitas, A; De Villiers, Johan P; Nel, Willem AJDate:Jun 2015A target of interest measured by a high range resolution radar may be modelled by multiple dominant points of reflections referred to as dominant scatterers. In this study a non-linear state space setting is used to model the states and ...Read more
Author:Janse van Rensburg, V; Mishra, A; Nel, Willem AJDate:May 2013Some Inverse Synthetic Aperture Radar (ISAR) algorithms form the image in a two-step process of range alignment and phase conjugation. This paper discusses a comprehensive set of measures used to quantify the quality of range alignment, with ...Read more
Author:Abdul Gaffar, MY; Nel, Willem AJ; Inggs, MRDate:Oct 2008Inverse synthetic aperture radar (ISAR) is an imaging technique that is dependent on an object’s rotational motion over a coherent processing interval. Maritime vessels and aircraft possess 3-D rotational motion, whereas it is only their ISAR ...Read more
Author:Abdul Gaffar, MY; Nel, Willem AJ; Inggs, MRDate:Sep 2009Inverse synthetic aperture radar (ISAR) imaging of sea vessels is a challenging task because their 3-D rotational motion over the coherent processing interval (CPI) often leads to blurred images. The selection of the duration of the CPI, also ...Read more
Author:Nel, Willem AJ; Giusti, E; Martorella, M; Abdul Gaffar, MYDate:Oct 2011Autofocus is a well known required step in ISAR (and SAR) processing to compensate translational motion. This research proposes a time domain autofocus algorithm and discusses its relation to the well known phase gradient autofocus (PGA) ...Read more
Author:Steyn, JM; Nel, Willem AJDate:Oct 2014Most research efforts in ISAR focus on techniques to form the image via autofocus or on classification (assuming that the ISAR imagery is already generated). An important step between image formation and classification is to determine which ...Read more
Author:Botha, LDate:Mar 2007This paper looks at the suitability of using the CADRCS RCS prediction tool for research into a class of NCTR work where the radar will give a high resolution output of the target, either a High Range Resolution (HRR) plot or Inverse Synthetic ...Read more