Abstract
In this Letter, the authors consider the integrated satellite-terrestrial networks with non-orthogonal multiple access (NOMA) scheme, where the satellite communicates with users through a decode-and-forward relay. The impact of imperfect channel state information (CSI) is studied by adopting a pilot-based channel estimation. Closed-form outage probability expressions for each NOMA user are derived, as well as asymptotic expressions at high signal-to-noise ratio region. Simulation is implemented to confirm the validity of theoretical results and the superiority of the proposed NOMA scheme.
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