Abstract:With the rapid development of Low Earth Orbit (LEO) Internet satellite systems represented by “Star Link”, the number of applications of spaceborne phased array antennas has grown rapidly. In the future, LEO Internet satellites are easy to provide space-borne electromagnetic wave direction...
In low earth orbit (LEO) satellite constellations, when earth-fixed footprint mode is used, the switching of beams between coverage regions affects the elevation angle of the coverage, which in turn affects the communication quality. A coverage region switching...
Development of Global Geographical Coverage Area for Terrestrial Networks Internetworked with Leo Satellite Network 来自 国家科技图书文献中心 喜欢 0 阅读量: 33 作者:VOC Eke,AN Nzeako 摘要: Network planning, analysis and design are an iterative process aimed at ensuring that a new network service ...
Due to the high mobility nature of the low Earth orbit (LEO) satellite systems, the satellite's coverage area changes with time causing an extremely freq... PJ Wan,V Nguyen,B Hong - Global Telecommunications Conference 被引量: 9发表: 1999年 Channel Allocation with and without Handover Queuin...
A single LEO satellite’s coverage is less, so many satellites must be used to cover the entire area (LEO constellation), while a single GEO satellite is enough to cover the same area. As LEO satellites are constantly moving relative to the Earth, they tend to spend a lot of time over...
They possess the capability of coverage over a large geographical area- one GEO satellite can cover up to one-third of the Earth’s surface. But, this also results in a lower spatial resolution. GEO satellites also have the longest lifespan among the three, with operational lives often reachi...
As a result, theantenna aperture of the satellite or the user terminal is enlarged, Satellite antenna aperture is too narrow, and low elevation con-stellation satellite single satellite coverage area is large. If the low elevation constellation satellite is used, the satellite spot beamwill be ...
providing coverage to a specific area. From the ground, GEO satellites appear to be, well, stationary. At about 35,000 kilometers (22,000 miles) above the Earth’s surface, this type of orbit was first used in 1964 forNASA’s Syncom III, an experimental satellite for communications aboard...
The satellite visibility for a UE is defined as the ratio of the number of time instances with visible satellites to the total number of time instances. The visibility of a satellite over a region is determined by the lowest visibility level among all the UEs in that area. If the value...
Most PNT resources are delivered through a primary domain of government-owned and operated GNSS satellite constellations which are generally in Medium Earth Orbit (MEO), such as GPS (United States), Galileo (European Union), GLONASS (Russia), and BeiDou (China). ...