Fairness-Oriented Transmission Schemes for Multiuser MISO Broadcast Channels

With the increasing number of Internet Things (IoT), Industry 4.0 (I4.0), and mobile devices, it can be expected that base stations will have to serve more clients with a limited antennas. For their broadcast channels, nonorthogonal multiple access (NOMA) blind interference alignment (BIA) are two efficient commonly adopted transmission schemes. This paper conducts comparison study on these techniques 3-user 2 × 1 multiple-input single-output (MISO) channel transmit Specifically, space-time block coding based NOMA (STBC-NOMA) NOMA-assisted beamforming (NOMA-BF) compared BIA. Both perfect imperfect successive cancellation (SIC) been considered for NOMA-based schemes, theoretical achievable rates all schemes derived. Furthermore, given fairness constraint among end users, power allocation (PA) problems solved cases when accurate state information is available at transmitter (CSIT) as well only path loss available. Numerical results show following: (1) none under this always outperform others different SNR regions. (2) SIC, NOMA-BF, STBC-NOMA both suffer from significant performance high condition. (3) Fairness PA provides similar CSIT, thus partial CSIT adequate system or scheme designs in practice.