Results 61 to 70 of about 1,780 (204)

Analysis for sparse channel representation based on dictionary learning in massive MIMO systems

IET Communications, Volume 18, Issue 20, Page 1728-1740, December 2024.
We provide a qualitative analytical formula for dictionary sparse representation accuracy and establish an optimal upper bound. Abstract The accuracy analysis of dictionary sparse representation for channels in massive MIMO systems is a relatively unexplored field.
Qing‐Yang Guan
wiley   +1 more source

2-D Coherence Factor for Sidelobe and Ghost Suppressions in Radar Imaging [PDF]

, 1956
The coherence factor (CF) is defined as the ratio of coherent power to incoherent power received by the radar aperture. The incoherent power is computed by the multi-antenna receiver based on only the spatial variable.
Li, Shiyong, Amin, Moeness, An, Qiang, Zhao, Guoqiang, Sun, Houjun   +4 more
core   +3 more sources

Target Oriented High Resolution SAR Image Formation via Semantic Information Guided Regularizations

, 2017
Sparsity-regularized synthetic aperture radar (SAR) imaging framework has shown its remarkable performance to generate a feature enhanced high resolution image, in which a sparsity-inducing regularizer is involved by exploiting the sparsity priors of ...
Hou, Biao, Jiao, Licheng, Wen, Zaidao, Wu, Qian   +3 more
core   +1 more source

A method of 2D and 3D display of radar terminal base on programmable pipeline

IET Radar, Sonar &Navigation, Volume 18, Issue 12, Page 2513-2520, December 2024.
In contrast to the ideal 3D display for meteorological radar, there is no 3D mode in the military engineering field. How to realise the 2D and 3D display for general radar terminal efficiently using the local graphics processing unit (GPU), which is impossible to realise with the traditional method of field programmable gate array now, has became an ...
Zhenkui Miao, Gongjian Zhou, Keyi Li, Xiangyang Pan   +3 more
wiley   +1 more source

Near‐field scattering centre modelling for complex targets

IET Radar, Sonar &Navigation, Volume 18, Issue 12, Page 2657-2666, December 2024.
In this paper, the authors presented the near‐field scattering centre model with the dependence description of radar distance. The model can be used to quickly calculate the near‐field scattering field and radar image features of complex targets. Abstract The parametric scattering centre (SC) model of the target has been widely used in the rapid ...
Yanxi Chen, Kunyi Guo, Zhouyang Liu, Xinqing Sheng   +3 more
wiley   +1 more source

3-D High-Resolution ISAR Imaging for Noncooperative Air Targets

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
This article uses the inverse synthetic aperture radar (ISAR) imaging method to present real-world tests on 3-D radar imaging of noncooperative air targets. Initially, the fundamentals of 3-D ISAR are introduced.
Marcin Kamil Baczyk, Piotr Samczynski, Jedrzej Drozdowicz, Maciej Wielgo, Jakub Sobolewski, Marek Ciesielski, Jakub Julczyk, Krzysztof Stasiak, Grzegorz Pietrzykowski, Karol Abratkiewicz, Maciej Soszka   +10 more
doaj   +1 more source

Logarithmic Laplacian Prior Based Bayesian Inverse Synthetic Aperture Radar Imaging

Sensors, 2016
This paper presents a novel Inverse Synthetic Aperture Radar Imaging (ISAR) algorithm based on a new sparse prior, known as the logarithmic Laplacian prior.
Shuanghui Zhang, Yongxiang Liu, Xiang Li, Guoan Bi   +3 more
doaj   +1 more source

140GHz帯ミリ波レーダのためのRPM法による高速・高精度立体画像化 [PDF]

, 2016
超広帯域レーダは高い距離分解能を有し，光学センサの運用が困難な状況で計測が可能であり，有用とされている．近年，140GHz帯の超広帯域レーダが，装置の小型化や高分解能化の観点から注目されており．建設現場における重機の目標物認識センサや救助ロボット，高齢者見守りシステム等に有用とされている．目標形状の画像化技術として，既に合成開口処理(SAR: Synthetic Aperture Radar)や，SEABED(Shape Estimation Algorithm based on Boundary ...
Yuta Sasaki, 佐々木 優太
core   +1 more source

An Adversarial Super-Resolution Remedy for Radar Design Trade-offs

, 2019
Radar is of vital importance in many fields, such as autonomous driving, safety and surveillance applications. However, it suffers from stringent constraints on its design parametrization leading to multiple trade-offs. For example, the bandwidth in FMCW
armanious, chen, dolgov, goodfellow, hubbert, kingma, richards, ronneberger, torres   +8 more
core   +1 more source

A novel multi‐target TBD scheme for GNSS‐based passive bistatic radar

IET Radar, Sonar &Navigation, Volume 18, Issue 12, Page 2497-2512, December 2024.
The paper presents a novel approach to enhance low‐altitude surveillance in urban and suburban areas using GNSS‐based passive bistatic radar systems. Despite challenges such as weak signal power budget and complex multi‐target tracking, the proposed method introduces a track‐before‐detect (TBD) strategy with a DCCF‐based cluster centroid extraction ...
Tao Tang, Pengbo Wang, Peng Zhao, Hongcheng Zeng, Jie Chen   +4 more
wiley   +1 more source