The performance differences are investigated for terrestrial relay-assisted Integrated Satellite-Terrestrial Networks(ISTNs)when satellite employs different decoding schemes.Initially,a multi-user pairing scheme leveraging location information is proposed,and multiple users within the coverage area of satellite beam are divided into several groups.To improve transmission reliability and spectral efficiency,users communicate with satellite employing hybrid multiple access.Additionally,assuming that user-terrestrial relay links obey Nakagami-m fading while terrestrial relay-satellite link follows correlated shadowed-Rician fading,the closed-form expressions of outage probability and throughput are derived when the satellite adopts Successive Interference Cancellation(SIC)and Joint Decoding(JD)respectively.Finally,computer simulations validate the correctness of the theoretical analysis and the superiority of the proposed scheme compared with Orthogonal Multiple Access(OMA),and reveal that JD decoding scheme is feasible in the ISTNs.
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