Results 81 to 90 of about 35,279 (308)
On the quality of VoIP with DCCP for satellite communications [PDF]
, 2012 We present experimental results for the performance of selected voice codecs using DCCP with CCID4 congestion control over a satellite link. We evaluate the performance of both constant and variable data rate speech codecs for a number of simultaneous ...
Emmanuel Lochin +5 more
core +1 more source
Advanced Science, EarlyView.Tunable dynamics of an interface‐type memristor array enabled by dual‐ion modulation through Ag nanoclusters are demonstrated. A 32 × 32 one‐resistor (1R) array exhibits 100% yield with high temporal/spatial uniformity (<3%) and a rectification ratio of 105.
Yoonho Cho +7 more
wiley +1 more source
Satellite-Communications: LMS_time_series_gen_GEO_v1_1
, 2015 <p>LMS time series generator for Ka-band using GEO satellite, based on “Rec. ITU-R P.618-12 - Propagation data and prediction methods required for the design of earth-space telecommunication systems.” International Telecommunication ...
Ferreira, Paulo (5302141) +3 more
core +1 more source
Advanced Science, EarlyView.Molecular dipole engineering in dendritic perylene diimide polymers through nitrogen‐rich heterocyclic linkers amplifies the built‐in electric field, enabling sub‐picosecond charge separation and efficient multi‐electron accumulation. This structure–dynamics–performance relationship establishes a versatile design strategy for high‐performance organic ...
Ying‐Xin Qiao +11 more
wiley +1 more source
Scientometric Analysis of Published Scientific Productions in the Field of Satellite Constellations [PDF]
فصلنامه علوم و فناوری فضاییSatellite constellations consist of similar satellites distributed in a specific orbital pattern to accomplish a joint mission. They are commonly used for global telecommunications, positioning, and remote sensing missions.
Hossein Eftekhari +3 more
doaj +1 more source
Satellite Communications. Research Trends and Open Issues
, 2007 A panoramic view on the study and design of digital satellite communication links is the focus of this paper. Starting from the characterization of satellite propagation channel in different application environments (from broadcast to fixed terminals,
P. T. Mathiopoulos +10 more
core +1 more source
A cross-layer approach to enhance QoS for multimedia applications over satellite [PDF]
, 2009 The need for on-demand QoS support for communications over satellite is of primary importance for distributed multimedia applications. This is particularly true for the return link which is often a bottleneck due to the large set of end-users accessing a
Exposito, Ernesto +4 more
core +1 more source
Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems
Advanced Electronic Materials, EarlyView.Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang +9 more
wiley +1 more source
HeliyonThe rapid development of the Internet of Things (IoT) has extensively promoted the development of Wireless Sensor Networks (WSNs), an essential technology for series displaying perception and data collected from the physical world. In densely distributed
Na Ma, Shouxin Wang, Shuailing Hao
doaj +1 more source
POST Launch Mission Analysis for the KOMPSAT-1 [PDF]
Journal of Astronomy and Space Sciences, 2000 The post-launch mission analysis of the KOMPSAT-1 spacecraft was carried out. The injection accuracy of the Taurus launch vehicle was analyzed by comparison of the target and the realized orbit parameters.
Byoung-Sun Lee +2 more
doaj