Results 21 to 30 of about 3,090,321 (210)
Eigen-patch iris super-resolution for iris recognition improvement [PDF]
, 2015 Low image resolution will be a predominant factor in iris recognition systems as they evolve towards more relaxed acquisition conditions. Here, we propose a super-resolution technique to enhance iris images based on Principal Component Analysis (PCA ...
23rd European Signal Processing Conference (EUSIPCO) +3 more
core +1 more source
Theory for the Accuracy of Microcomb Photonic Microwave Transversal Signal Processors [PDF]
IEEE Journal of Selected Topics in Quantum Electronics (JSTQE)
Volume 29 (2023), 2023 Photonic RF transversal signal processors, which are equivalent to reconfigurable electrical digital signal processors but implemented with photonic technologies, have been widely used for modern high-speed information processing. With the capability of generating large numbers of wavelength channels with compact micro-resonators, optical microcombs ...
arxiv +1 more source
Aircraft Target Classification Based on Correlation Features from Time-domain Echoes
Leida xuebao, 2015 This paper reports the classification of helicopters, propeller-driven aircraft, and turbojet based on differences in their time-domain modulation periods using a conventional radar system.
Du Lan +4 more
doaj +1 more source
Investigation on Multimode SAR Imaging Based on Digital Array Radar
Leida xuebao, 2014 Digital Array Radar (DAR) has the ability of simultaneous multimode imaging and has many potential applications. This paper firstly introduces the basic hardware structure and the operation principle of DAR.
Li Xue-shi +4 more
doaj +1 more source
MEO SAR Imaging Based on Imaging Coordinate System Optimization
Leida xuebao, 2020 In the Medium-Earth-Orbit Synthetic Aperture Radar (MEO SAR), the curved trajectory and long synthetic aperture time lead to a two-dimensional spatial variation in the signals.
Hang LI +5 more
doaj +1 more source
Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection
Remote Sensing, 2021 In this paper, an ultra-low-altitude target (ULAT) detection approach, referred to as the multi-resolution space-time adaptive processing (STAP), is proposed to enhance the target detection performance in a missile-borne radar system.
Haodong Li +5 more
doaj +1 more source
MIMO radar techniques: two-stage constant false alarm rate detection for fast-fluctuating targets
The Journal of Engineering, 2019 Here, the authors analyse a two-step constant false alarm rate (CFAR) detection problem in distributed sensor system (e.g. statistical multiple-input multiple-output (MIMO) radar) for fast-fluctuating targets (TS-AMF-II).
Zhihua Li +3 more
doaj +1 more source
Signal processing with Levy information [PDF]
, 2012 Levy processes, which have stationary independent increments, are ideal for modelling the various types of noise that can arise in communication channels.
Bain A +21 more
core +2 more sources
Graph signal processing with categorical perspective [PDF]
arXiv, 2023 In this paper, we propose a framework for graph signal processing using category theory. The aim is to generalize a few recent works on probabilistic approaches to graph signal processing, which handle signal and graph uncertainties.
arxiv
Reversible Joint Hilbert and Linear Canonical Transform Without Distortion [PDF]
IEEE Transactions on Signal Processing, Volume 61, Issue 19,
Oct.1, 2013, 2017 Generalized analytic signal associated with the linear canonical transform (LCT) was proposed recently by Fu and Li ["Generalized Analytic Signal Associated With Linear Canonical Transform," Opt. Commun., vol. 281, pp. 1468-1472, 2008]. However, most real signals, especially for baseband real signals, cannot be perfectly recovered from their ...
arxiv +1 more source