On Performance of IRS-Assisted Hybrid Satellite–Terrestrial Cooperative Communication

In this paper, an intelligent reflecting surface (IRS)-assisted hybrid satellite–terrestrial cooperative system is considered, where direct transmission between the satellite and the destination is not present due to the masking effect and the destination node receives amplify-and-forward relayed transmission through an IRS. It is assumed that the channel between satellite and relay undergoes shadowed Rician fading, while the cascaded relay–IRS–destination link follow Rayleigh distribution. The performance of the considered system is evaluated by deriving an approximate closed-form expression for the average symbol error rate (SER) of the considered system for
$M$
-ary phase-shift keying modulation. Further, analysis for diversity order is also carried out using the asymptotic SER. In addition to this, analytical expressions for upper bound on the ergodic capacity and the outage probability of the considered system are also obtained.