نتایج جستجو برای: cfar

تعداد نتایج: 448  

2004
I. Garvanov Ivan Popchev

In many practical situations, however, the environment is presence of strong pulse jamming (PJ) with high intensity; the pulse jamming is with binomial distribution. In this case, the pulse jamming can cause drastic degradation in the performance of Constant False Alarm Rate (CFAR) processors. In this paper, CA CFAR and CA CFAR BI (binary integration) processors in binomial distributed pulse ja...

2013
Laura Anitori Wim van Rossum Matern Otten Arian Maleki Richard Baraniuk

In this paper we investigate the performance of a combined Compressive Sensing (CS) Constant False Alarm Rate (CFAR) radar processor under different interference scenarios using both the Cell Averaging (CA) and Order Statistic (OS) CFAR detectors. Using the properties of the Complex Approximate Message Passing (CAMP) algorithm, we demonstrate that the behavior of the CFAR processor is independe...

Journal: :EURASIP J. Adv. Sig. Proc. 2010
Hiroyuki Yamaguchi Wataru Suganuma

We propose a new constant false alarm rate (CFAR) detection method from noncoherent radar echoes, considering heterogeneous sea clutter. It applies the Bayesian theory for adaptive estimation of the local clutter statistical distribution in the cell under test. The detection technique can be readily implemented in existing noncoherent marine radar systems, which makes it particularly attractive...

2012
Mohamed B. El Mashade

A constant false alarm rate in the presence of variable levels of noise is usually a requirement placed on any modern radar. The CAand OS-CFAR detectors are the most widely used ones in the CFAR world . The cell-averaging (CA) is the optimum CFAR detector in terms of detection probability in homogeneous background when the reference cells have identical, independent and exponentially distribute...

2017
Jiaqiu Ai Xuezhi Yang Fang Zhou Zhangyu Dong Lu Jia He Yan

Traditional constant false alarm rate (CFAR) detectors only use the contrast information between ship targets and clutter, and they suffer probability of detection (PD) degradation in multiple target situations. This paper proposes a correlation-based joint CFAR detector using adaptively-truncated statistics (hereafter called TS-2DLNCFAR) in SAR images. The proposed joint CFAR detector exploits...

Journal: :Digital Signal Processing 2010
Roberto Perez-Andrade René Cumplido Claudia Feregrino Uribe Fernando Martin del Campo

Constant False Alarm Rate (CFAR) algorithms are used in digital signal processing applications to extract targets from background in noisy environments. Some examples of applications are target detection in radar environments, image processing, medical engineering, power quality analysis, features detection in satellite images, Pseudo-Noise (PN) code detectors, among others. This paper presents...

Journal: :IEEE Trans. Signal Processing 1999
Shawn Kraut Louis L. Scharf

The constant false alarm rate (CFAR) matched subspace detector (CFAR MSD) is the uniformly most-powerful-invariant test and the generalized likelihood ratio test (GLRT) for detecting a target signal in noise whose covariance structure is known but whose level is unknown. Recently, the CFAR adaptive subspace detector (CFAR ASD), or adaptive coherence estimator (ACE), was proposed for detecting a...

ژورنال: :مهندسی نقشه برداری و اطلاعات مکانی 0
مسعود حبیبی m. habibi گروه سنجش از دور- دانشکده مهندسی نقشه برداری - دانشگاه صنعتی خواجه نصیرالدین طوسی محمودرضا صاحبی m. r. sahebi گروه سنجش از دور- دانشکده مهندسی نقشه برداری - دانشگاه صنعتی خواجه نصیرالدین طوسی محسن قنبری m. ghanbari گروه سنجش از دور- دانشکده مهندسی نقشه برداری - دانشگاه صنعتی خواجه نصیرالدین طوسی

هدف این تحقیق آشکارسازی هدف با استفاده از تصاویر راداری با قدرت تفکیک بالا بر اساس روش نرخ هشدار اشتباه ثابت می-باشد. الگوریتم توسعه داده شده در این مقاله یکی از روش های cfar با نام ca-cfar بوده و به دلیل کارایی بالا و آسانی اجرای الگوریتم در تحقیقات زیادی مورد استفاده قرار گرفته و نتایج مناسبی در اختیار قرار داده است. ca-cfarیک الگوریتم انطباقی است که از ان برای جدا کردن اهداف از پس زمینه در ت...

2010
Lyubka Doukovska

A different technique of CFAR detectors procedure for moving target detection in noise environment conditions with a Poisson distributed flow and Raleigh amplitude distribution is proposed in this paper . The expressions of the detection and false alarm probability are derived for a highly fluctuating Swerling II target. A comparative analysis of the performance of different radar detectors str...

2018
Md. Maynul Islam Mohammed Hossam-E-Haider

Target detection of RADAR deals with different and manifold problems over few decades. The detection capability is one of the most significant factors in RADAR system. The main aim of detection is to increase probability of detection while decreasing rate of false alarm. The threshold of detection is modified as a function of the receiver noise level to keep a fixed rate of false alarm. Constan...

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