Study and analysis of PD-NOMA in downlink land mobile satellite systems

Satellite communication systems offer an extensive coverage, reliable connection, massive connectivity and also supplements the existing communication infrastructures. In this work, the extension of Power Domain Non-Orthogonal Multiple Access (PD-NOMA) technique is used for analyzing the downlink in satellite communication systems. When compared with the existing TDMA technique that puts a limitation on the number of users and efficiency of the spectrum, PD-NOMA is observed as a major advantageous technique. The merits of PD-NOMA are realized in terms of sum rate, bit error rate, outage probability and the analysis of sum rate has also been extended to multiple users. Furthermore, the comparison of PD-NOMA with TDMA is also studied.