Stochastic Analysis of Successive Interference Cancellation in a Narrow-Beam LEO Uplink

We investigate SIR distributions and order statistics of user equipments (UEs) at a typical low Earth orbit satellite base station (LEO BS) with narrow Gaussian antenna beams in the uplink. We analyze SIR distributions for the three strongest UEs under successive interference cancellation (SIC), using a Gaussian mixture shadowing model. The UEs are distributed on Earth according to a Poisson point process (PPP). We show that SIC enables each LEO BS to serve multiple UEs per beam cell, achieving simultaneously a good average network throughput and user fairness.