Results 1 to 10 of about 26,650 (217)
Satellite Jitter Estimation and Validation Using Parallax Images
Sensors, 2017 Satellite jitter (SJ) is an important error source that affects the geometric accuracy of high resolution satellite imagery. In this paper, the quantitative relationship between the jitter displacement (image displacement caused by SJ) and relative ...
Jun Pan, Ying Zhu, Mi Wang
exaly +3 more sources
High performance optical shutter design with scalable aperture [PDF]
Bulletin of the Polish Academy of Sciences: Technical Sciences, 2021 In this paper, design, construction and switching parameters of a self-made optical shutter with scalable aperture were reported. The aim of the study was to obtain the shortest possible switching times, minimum shutter open time and comparable with ...
Piotr Pokryszka +3 more
doaj +1 more source
Remote Sensing, 2022 Satellite platform jitter is a non-negligible factor that affects the image quality of optical cameras. Considering the limitations of traditional platform jitter detection methods that are based on attitude sensors and remote sensing images, this paper ...
Ying Zhu +6 more
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A survey on 3G mobile network traffic performance and analysis in Ethiopia
Cogent Engineering, 2022 Mobile phones have an impact on the economic development of a country as the technology develops through the provision of high-value 3G and 4 G data services accessed via smartphones, tablets, and dongles that deliver mobile data services to businesses ...
Fanuel Melak Asmare +2 more
doaj +1 more source
Accurate Characterization for Continuous-Time Linear Equalization in CMOS Optical Receivers
IEEE Access, 2022 Recently published CMOS optical receivers consist of a limited-bandwidth first-stage transimpedance amplifier (TIA) followed by an equalizer. Limiting the TIA’s bandwidth improves the gain and reduces the noise but introduces a significant inter ...
Diaaeldin Abdelrahman, Mohamed Atef
doaj +1 more source
Ingeniería e Investigación, 2021 This article presents the first results of the timing-jitter characterization of a VCSEL-based optoelectronic oscillator (VBO) at 2,5GHz. For all implementations, vertical-cavity surface-emitting lasers (VCSEL) emitting in the O and C-bands were ...
Christian Daniel Muñoz +4 more
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مجلة النهرين للعلوم الهندسية, 2020 As internet network developed rapidly in the past ten years, and its operating environment is constantly changing along with the development of computer and communication technology, the congestion problem has become more and more serious.
Samar Taha Yousif +1 more
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QoS-Aware Scheduling Algorithm Enabling Video Services in LTE Networks
Computers, 2022 The Long-Term Evolution (LTE) system was a result of the 3rd-Generation Partnership Project (3GPP) to assure Quality-of-Service (QoS) performance pertaining to non-real-time and real-time services.
Amal Abulgasim Masli +2 more
doaj +1 more source
Practical Limits on Nanosatellite Telescope Pointing: The Impact of Disturbances and Photon Noise
Frontiers in Astronomy and Space Sciences, 2021 Accurate and stable spacecraft pointing is a requirement of many astronomical observations. Pointing particularly challenges nanosatellites because of an unfavorable surface area–to-mass ratio and a proportionally large volume required for even the ...
Ewan S. Douglas +2 more
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E-model MOS Estimate Improvement through Jitter Buffer Packet Loss Modelling
Advances in Electrical and Electronic Engineering, 2011 Proposed article analyses dependence of MOS as a voice call quality (QoS) measure estimated through ITU-T E-model under real network conditions with jitter. In this paper, a method of jitter effect is proposed.
Adrian Kovac +3 more
doaj +1 more source