Ergodic Capapcity of NOMA-Based Satellite Networks with Randomly Deployed Users

In this letter, we investigate the ergodic capacity
of an uplink satellite network using a power-domain nonorthogonal
multiple access (NOMA for simplicity) to serve users
simultaneously in the consideration of random deployment of
satellite users. Taking into account the deployed information of
served users, we derive expression for the achievable ergodic
capacity of the considered networks, where an entire link budget
involving propagation loss, channel statistical prosperities, and
location information is considered. Moreover, expression for
ergodic capacity with OMA scheme is also derived to facilitate
the performance comparison. Numerical simulation results are
provided to attest the validity of theoretical results and show the
vital effect of key parameters, such as the deployed information
and link quality on the considered networks.