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Stochastic Geometry-based Analysis of LEO Satellite Communication Systems

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Document pages: 5 pages

Abstract: This letter studies the performance of a low-earth orbit (LEO) satellitecommunication system where the locations of the LEO satellites are modeled as abinomial point process (BPP) on a spherical surface. In particular, we studythe user coverage probability for a scenario where satellite gateways (GWs) aredeployed on the ground to act as a relay between the users and the LEOsatellites. We use tools from stochastic geometry to derive the coverageprobability for the described setup assuming that LEO satellites are placed atn different altitudes, given that the number of satellites at each altitude akis Nk for all k. To resemble practical scenarios where satellite communicationcan play an important role in coverage enhancement, we compare the performanceof the considered setup with a scenario where the users are solely covered by afiber-connected base station (referred to as anchored base station or ABS inthe rest of the paper) at a relatively far distance, which is a commonchallenge in rural and remote areas. Using numerical results, we show theperformance gain, in terms of coverage probability, at rural and remote areaswhen LEO satellite communication systems are adopted. Finally, we draw multiplesystem-level insights regarding the density of GWs required to outperform theABS, as well as the number of LEO satellites and their altitudes.

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