We propose a constant false alarm rate (CFAR) algorithm for moving target detection in synthetic aperture radar (SAR) images based on the spreading characteristics of interferograms on the magnitude-phase (M-P) plane. This method is based on the observation that, in practice, both moving and stationary targets along with clutter are located at different regions in the M-P plane, and hence reaso...

The acquisition of code phase and frequency shift is a pre-requisite for any Code Division Multiple Access (CDMA) system. One important step in the acquisition process is the choice of a suitable decision variable and of an appropriate threshold, which will determine the probabilities of detection and false alarm. In serial-search strategies and in many hybrid-search strategies proposed in lite...

This paper investigates two methods for GMTI using three-channel SAR-ATI data. Motivated by previous results in the two-channel case, a deterministic method for finding an Eigendecomposition of the SAR-ATI sample covariance matrix is presented. The CFAR detection capability of each of the eight parameters of the Eigendecomposition is evaluated using measured three-channel airborne data and comp...

Synthetic Aperture Radar (SAR) has over the years evolved to be one of the most promising remote sensing modalities for largescale monitoring of the ocean and maritime activity. The use of SAR imagery in a variety of monitoring applications has motivated significant research on the statistical modelling of such images, with recent work focusing on the ability of the data’s heavy-tailed nature t...

In this paper we study some standard problems of SSR (Secondary Surveillance Radar), relating to improving the detection performance of the conventional SSR and Mode S replies in SSR FRUIT environment. We present the algorithm that consists of a conventional two-dimensional CFAR BI processor combined with the estimator of the FRUIT parameters, which is necessary for automatic selecting of the a...

“We thank all the study participants. For technical assistance we thank Kuo Yang and members of the UNC Clinical Trials Unit, the UNC CFAR Immunology Core and the UNC Flow Cytometry Core Facility. This study was supported by NIH grants to the Collaboratory of AIDS Researchers for Eradication (CARE; U19 AI096113) and the UNC Center for AIDS Research (CFAR; P30 AI50410). This research was also su...

The most distinctive characteristic of synthetic aperture radar (SAR) is that it can acquire data under all weather conditions and at all times. However, its coherent imaging mechanism introduces a great deal of speckle noise into SAR images, which makes the segmentation of target and shadow regions in SAR images very difficult. This paper proposes a new SAR image segmentation method based on w...

صفحه‌­ی مینیاتوری LEU پرتودهی شده در رآکتور تحقیقاتی تهران که برای تولید رادیوایزوتوپ مولیبدن-99 استفاده می‌شود، منبع پرتوزایی متشکل از رادیوایزوتوپ‌های مختلف است. محاسبه و تخمین آهنگ دز تابش‌های گامای گسیلی این منبع، به منظور مقایسه با مقادیر مجاز توصیه حمل‌ونقل مواد پرتوزا حفاظت پرتویی کارکنان حین انجام تست‌های آزمایشگاهی داغ، پیش هر اقدام عملی، امری ضروری مقاله، اعتبار یک روش پیشنهادی جهت هد...