Results 11 to 20 of about 5,576,142 (251)

High-Resolution and Wide-Swath SAR Imaging with Space–Time Coding Array

open access: yesRemote Sensing, 2023
To achieve high-resolution and wide-swath (HRWS) synthetic aperture radar (SAR) images, this paper focuses on resolving the problem of separating range-ambiguous echoes with the space–time coding (STC) array.
Kun Yu, Shengqi Zhu, Lan Lan, Biao Yang
doaj   +1 more source

A Dynamic Range Ambiguity Resolution Algorithm for Radar Seeker Based on Vote Accumulation [PDF]

open access: yesHangkong bingqi, 2021
Most of current PD radar seekers adopt multiple PRF technique and one-dimension set algorithm (OSA) to address range ambiguity. The OSA can solve the range ambiguity effectively with high robustness.
Chen Wei, Chen Jing, Cui Bingzhe, Guo Yuxia, Wang Yanyan
doaj   +1 more source

Unambiguous Forward-Looking SAR Imaging on HSV-R Using Frequency Diverse Array

open access: yesSensors, 2020
It is a challenge to realize wide swath imaging due to the conflict between Doppler ambiguity and range ambiguity for hypersonic vehicle (HSV) radar. In addition, there are many conditions requiring the forward-looking imaging.
Mengdi Zhang   +3 more
doaj   +1 more source

Resolving depth measurement ambiguity with commercially available range imaging cameras [PDF]

open access: yes, 2010
Time-of-flight range imaging is typically performed with the amplitude modulated continuous wave method. This involves illuminating a scene with amplitude modulated light.
McClure, Shane H.   +3 more
core   +1 more source

Independent Biaxial Scanning Light Detection and Ranging System Based on Coded Laser Pulses without Idle Listening Time

open access: yesSensors, 2018
The goal of light detection and ranging (LIDAR) systems is to achieve high-resolution three-dimensional distance images with high refresh rates and long distances. In scanning LIDAR systems, an idle listening time between pulse transmission and reception
Gunzung Kim, Yongwan Park
doaj   +1 more source

Performance Investigation on Elevation Cascaded Digital Beamforming for Multidimensional Waveform Encoding SAR Imaging

open access: yesLeida xuebao, 2020
An important issue in a Synthetic Aperture Radar (SAR) system employing Multidimensional Waveform Encoding (MWE) is the fulfillments of Digital BeamForming (DBF) on receive in elevation for a reliable separation of the mutually overlapped echoes from ...
Feng HE   +4 more
doaj   +1 more source

Method of Range Ambiguity Suppression Combining Sparse Reconstruction and Matched Filtering

open access: yesLeida xuebao, 2022
To a certain extent, SAR images are affected by range ambiguity due to antenna sidelobe characteristics and pulse operating system. The work of range ambiguity suppression focuses on SAR system design and signal processing.
Meng QI   +5 more
doaj   +1 more source

Analysis of Range Sidelobe of Pulse Doppler Fuze [PDF]

open access: yesHangkong bingqi, 2022
When attacking cruise missile at ultra-low altitude, the pulse Doppler fuze may appear false alarm at the range sidelobe due to range ambiguity. In this paper, the ambiguity graph and the sea echo characteristics of the pulse Doppler fuze are analyzed ...
Yuan Tao, Fan Mingjun
doaj   +1 more source

Dundee Discussion Papers in Economics 131:Explaining attitudes towards ambiguity: an experimental test of the comparative ignorance hypothesis [PDF]

open access: yes, 2002
Many theories have been put forward to explain attitudes towards ambiguity. This paper reports on an experiment designed to test for the existence of Comparative Ignorance when it is tested over different levels of probabilities.
Dolan, Paul, Jones, Martin
core   +1 more source

Ambiguity and Social Interaction [PDF]

open access: yes
We present a non-technical account of ambiguity in strategic games and show how it may be applied to economics and social sciences. Optimistic and pessimistic responses to ambiguity are formally modelled.
Kelsey, David   +2 more
core   +8 more sources

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