This communication deals with high-resolution direction finding using higher-order cumulants of the array data. Two 4th-order cumulant-based matrices are considered : the diagonal cumulant slice and the contracted quadricovariance. They are evaluated in the context of DOA estimation using "subspace" techniques. To this purpose, we introduce an original methodology to derive the closed form of a...

We consider array geometries whose direction-of-arrival (DOA) estimation performance is isotropic. An isotropic array is one whose Cramér–Rao bound (CRB) on the DOA of a single source is uniform for all angles. For both planar arrays and volume arrays we derive necessary and sufficient conditions on array element locations so that the array is isotropic. We also present several designs of isotr...

This paper presents a new approach for localizing mobile phone users using the promising technique of stratospheric platform (SP) flying at altitudes 17–22 km high and a suitable Direction-ofArrival technique (DOA). The proposed technique provides information about accurate locations for mobile stations — through high resolution DOA technique — which is very important for traffic control and re...

Doa merupakan salah satu rangkaian ibadah yang mempunyai keterkaitan dengan kesempurnaan iman seorang muslim. Dalam Islam doa sangatlah banyak, agar muslim dapat mengingat doa-doa harian mereka dibutuhkan media memfasilitasinya. Media mudah digunakan dan hampir setiap orang memilikinya adalah smartphone. Saat ini aplikasi pada smartphone sudah banyak dikembangkan, tetapi berdasarkan survei obse...

SRm160 is an SR-like protein implicated in multiple steps of RNA processing and nucleocytoplasmic export. Although its biochemical functions have been extensively described, its genetic interactions and potential participation in signaling pathways remain largely unknown, despite the fact that it is highly phosphorylated in both mammalian cells and Drosophila. To begin elucidating the functions...

The Multiple Signal Classification (MUSIC) algorithm is a powerful technique for determining the Direction of Arrival (DOA) of signals impinging on an antenna array.The algorithm is serial based, mathematically intensive, and requires substantial computing power to realize in real-time.Recently, multi-core processors are becoming more prevalent and affordable.The challenge of adapting existing ...

Besides the undirected environmental noise, the surrounding interference also brings great challenges to the robust DOA estimation of the speech source. As conventional DOA estimation methods always assume an undirected noise model, they usually cannot perform reliably when the strong inference exists. In this paper, we propose a novel interference robust DOA estimation method, which is based o...

R. DeLap Dept of EENG Air Force Institute of Technology Wright-Patterson AFB, OH 45433 A. Hero Dept of EECS The University of Michigan Ann Arbor, MI 48109 ABSTRACT In this paper we develop an adaptive beamsummer for direction of arrival (DOA) estimation of slow fading Raleigh signals, using a new design approach, termed \Adaptive Detection/Estimation for sPeci c Tasks" (ADEPT). For DOA estimati...

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...

This paper presents an initialization scheme for a constant modulus algorithm (CMA) adaptive antenna. With the proposed scheme, the direction of arrival (DOA) of signals is estimated by using nonconventional least square optimization. The antenna steering vector associated with the estimated DOA is used as an initial weight vector for CMA. Simulations were conducted to evaluate the performance ...