نتایج جستجو برای: imaging radar

تعداد نتایج: 490949  

2016
Yong Jia Xiaoling Zhong Jiangang Liu Yong Guo

Through-wall-radar imaging is of interest for mapping the wall layout of buildings and for the detection of stationary targets within buildings. In this paper, we present an easy single-side two-location spotlight imaging method for both wall layout mapping and stationary target detection by utilizing multiple-input multiple-output (MIMO) through-wall-radar. Rather than imaging for building wal...

2014
Sang-Hong Park

Inverse synthetic aperture radar (ISAR) imaging is an effective method to identify unknown targets regardless of weather and illumination conditions. Research results published regarding this topic have focused mainly on imaging and automatic target recognition (ATR) of single targets. However, targets generally fly in formation, so the applicability of ISAR images to ATR of multiple targets mu...

2014
Bin Yuan Shiyou Xu Zengping Chen

In inverse synthetic aperture radar (ISAR) imaging, micro-motion structures on the target will induce additional time-varying frequency modulations to the radar echoes. Due to the disturbance of these mechanical vibration or rotation parts, it will be difficult to obtain a well-focused ISAR image of the target using conventional translational motion compensation methods. To solve this problem, ...

2010
S. F. Li J. Chen L. Q. Zhang Y. Q. Zhou

The Complete Complementary Sequence (CC-S) consists of several complementary orthogonal sequences and has optimal sidelobe level performance, which is satisfied with the requirement of the orthogonal Multiple Input Multiple Output (MIMO) radar signals. Aimed at the difficulty of high sidelobe level in Synthetic Aperture Radar (SAR) imaging processing in range dimension, an approach of depressin...

2018
P. Sava E. Asphaug M. Haynes

Introduction: Fundamental answers about small planetary bodies origin and evolution hinge on our ability to image in detail their interior structure in 3D and at high resolution [2]. The interior structure is not easily accessible without redundant data, e.g., radar reflections observed from multiple viewpoints, as in medical tomography. The ideal targets for such investigation are Jupiter Fami...

2007
Yuriy Shkvarko René Fabián Vázquez-Bautista Ivan E. Villalon-Turrubiates

A new fused Bayesian maximum entropy–variational analysis (BMEVA) method for enhanced radar/synthetic aperture radar (SAR) imaging is addressed as required for high-resolution remote sensing (RS) imagery. The variational analysis (VA) paradigm is adapted via incorporating the image gradient flow norm preservation into the overall reconstruction problem to control the geometrical properties of t...

Journal: :The Review of scientific instruments 2009
F Thiel M Hein U Schwarz J Sachs F Seifert

Due to the recent advances in ultrawideband (UWB) radar technologies, there has been widespread interest in the medical applications of this technology. We propose the multimodal combination of magnetic resonance (MR) and UWB radar for improved functional diagnosis and imaging. A demonstrator was established to prove the feasibility of the simultaneous acquisition of physiological events by mag...

2012
X. Z. Ren Y. F. Li R. L. Yang

The observation data obtained from 4-D synthetic aperture radar system is sparse and non-uniform in the baseline-time plane. Hence, the imaging results acquired by traditional Fourierbased methods are limited by high sidelobes. Considering the sparse structure of actual target space in high frequency radar application, a novel 4-D imaging scheme based on compressive sensing is proposed in this ...

2015
Yongxiang Liu Shuanghui Zhang Dekang Zhu Xiang Li

In this paper, two novel speed compensation algorithms for ISAR imaging under a low signal-to-noise ratio (SNR) condition have been proposed, which are based on the cubic phase function (CPF) and the integrated cubic phase function (ICPF), respectively. These two algorithms can estimate the speed of the target from the wideband radar echo directly, which breaks the limitation of speed measuring...

2007
Yuriy Shkvarko Ivan E. Villalon-Turrubiates

The robust numerical technique for high-resolution reconstructive imaging and scene analysis is developed as required for enhanced remote sensing with large scale sensor array radar/synthetic aperture radar. First, the problem-oriented modification of the previously proposed fused Bayesianregularization (FBR) enhanced radar imaging method is performed to enable it to reconstruct remote sensing ...

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