Power domain based multiple access for iot deployment: Two-way transmission mode and performance analysis

Abstract

As one of the promising radio access techniques in two-way relaying network, we consider Power Domain based Multiple Access (PDMA) and such PDMA is effective way to deploy in 5G communication networks. In this paper, a cooperative PDMA two-way scheme with two-hop transmission is proposed to enhance the outage performance under consideration on how exact successive interference cancellation (SIC) performs at each receiver. In the proposed scheme, performance gap of two NOMA users are examined, and power allocation factors are main impairment in such performance evaluation. In order to reveal the benefits of the proposed scheme, we choose full-duplex at relay to improve bandwidth efficiency. As important result, its achieved outage probability is mathematical analyzed with imperfect SIC taken into account. Our examination shows that the proposed scheme can significantly outperforms existing schemes in terms of achieving a acceptable outage probability, i.e. a lower outage probability given.