Phase error correction by phase differential algorithm for synthetic aperture imaging ladar

2012 ◽  
Author(s):  
Ya'nan Zhi ◽  
Jianfeng Sun ◽  
Peipei Hou ◽  
Enwen Dai ◽  
Yu Zhou ◽  
...  
Keyword(s):  
Error Correction ◽  
Phase Error ◽  
Synthetic Aperture ◽  
Synthetic Aperture Imaging ◽  
Differential Algorithm

Phase error suppression by low-pass filtering for synthetic aperture imaging ladar

2014 ◽  
Author(s):  
Zhiwei Sun ◽  
Peipei Hou ◽  
Ya'nan Zhi ◽  
Jianfeng Sun ◽  
Yu Zhou ◽  
...  
Keyword(s):  
Phase Error ◽  
Synthetic Aperture ◽  
Synthetic Aperture Imaging ◽  
Low Pass ◽  
Error Suppression

Impact and correction of phase error in ladar signal on synthetic aperture imaging

2018 ◽  
Vol 47 (3) ◽  
pp. 306001
Author(s):  
胡烜 Hu Xuan ◽  
李道京 Li Daojing ◽  
田鹤 Tian He ◽  
赵绪锋 Zhao Xufeng
Keyword(s):  
Phase Error ◽  
Synthetic Aperture ◽  
Synthetic Aperture Imaging

Motion Error Correction Scheme Using the Spatial Doppler Characteristics of the In-Scene Target in the SAR Imaging System

2005 ◽  
Vol 277-279 ◽  
pp. 247-253
Author(s):  
Jeong Hee Choi ◽  
Eun Jung Kim
Keyword(s):  
Error Correction ◽  
Imaging System ◽  
Phase Error ◽  
Coherent Detection ◽  
Synthetic Aperture ◽  
Target Image ◽  
Complex Motion ◽  
Motion Error ◽  
Correction Scheme ◽  
Large Motion

The success of target reconstruction in the SAR(Synthetic Aperture Radar) imaging system is greatly dependent on coherent detection. Incoherent detection appears as a multiplicative phase error to echoed signal, which consequently causes fatal degradations such as fading or dislocation of target image. In this paper, we propose a motion error correction scheme using an in-scene target to compensate for relative distance error between the radar and the target. We start by modeling from a wave equation for one point target, and then derive the complex motion error from extended overall echoed data. The proposed algorithm is also good for the correction of relatively large motion error because it can be applied repeatedly, and it is converged after each iteration. We use the spatial Doppler characteristics of the strong in-scene target to retrieve motion error, thus, we only used the partial spectral echo data corresponding to the strong in-scene target. By doing this, we can reduce computational loads and the number of iterations for the large motion error. We verify the performance of the proposed algorithm by applying it to the simulated spotlight-mode SAR data.

Golay Coded Sequences in Synthetic Aperture Imaging Systems

2011 ◽  
Vol 36 (4) ◽  
Author(s):  
Ihor Trots ◽  
Yuriy Tasinkevych ◽  
Andrzej Nowicki ◽  
Marcin Lewandowski
Keyword(s):  
Imaging Systems ◽  
Synthetic Aperture ◽  
Synthetic Aperture Imaging
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