Ergodic Capacity of Multiuser Hybrid Satellite-Terrestrial Fixed-Gain AF Relay Networks with CCI and Outdated CSI

Abstract

In this paper, we investigate the ergodic capacity (EC) of a downlink multiuser hybrid satellite-terrestrial amplify-and-forward relay network (HSTAFRN) using a fixed-gain relaying protocol in the presence of co-channel interference. Herein, we employ opportunistic scheduling of terrestrial users by considering outdated channel state information over Nakagami-m fading channels of pertinent links. By deploying multiple antennas at the satellite, we derive a novel and accurate analytical expression of the achievable EC by making use of the complementary moment generating function transform. More importantly, we carry out the EC analysis under both uncorrelated and correlated shadowed-Rician fading channels of satellite links. Our numerical and simulation results attest the accuracy of the proposed analysis and reveal the impact of various system/channel parameters on EC of the considered HSTAFRN. © 1967-2012 IEEE.