نتایج جستجو برای: phase errors

تعداد نتایج: 731374  

Journal: :IEEE Access 2021

Single-layer phase screen is a classical, simple and accurate approach for simulating the optical field under turbulence, it generally used in free space communication (FSOC). However, conventional single-layer studies have rarely considered pointing errors from FSOC, which prevents theoretical results mobile FSOC being verified using simulated fields. This work establishes simulation method wi...

Journal: :Magnetic resonance in medicine 2008
Jingfei Ma Zachary Slavens Wei Sun Ersin Bayram Lloyd Estowski Ken-Pin Hwang James Akao Anthony T Vu

Large and spatially-linear phase errors along the frequency-encode direction may be induced by several common and hard-to-avoid system imperfections such as eddy currents. For data acquired in dual-echo Dixon techniques, the linear phase error can be more aggravated when compared to that acquired in a single echo and can pose challenges to a phase-correction algorithm necessary for successful D...

2002
R. G. Paxman J. R. Fienup

A segmented-aperture telescope such as the Multiple-Mirror Telescope will suffer from phase errors unless the segments are aligned to within a small fraction of a wavelength. Such a coherent alignment of the segments is difficult to achieve in real time. An alternative is to record the images degraded by phase errors and to restore them after detection by using phase-retrieval techniques. In th...

2007
Rupin Dalvi Rafeef Abugharbieh Mark Pickering Jennie Scarvell Paul Smith

Registration of two dimensional to three dimensional orthopaedic medical image data has important applications particularly in the area of image guided surgery and sports medicine. Fluoroscopy to computer tomography (CT) registration is an important case, wherein digitally reconstructed radiographs derived from the CT data are registered to the fluoroscopy data. Traditional registration metrics...

Journal: :CoRR 2017
Cheng Zhang Wangdong Qi Li Wei Jiang Chang Yuexin Zhao

1  Abstract—The radio interferometric positioning system (RIPS) is an accurate node localization method featuring a novel phase-based ranging process. Multipath is the limiting error source for RIPS in ground-deployed scenarios or indoor applications. There are four distinct channels involved in the ranging process for RIPS. Multipath reflections affect both the phase and amplitude of the rang...

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