Intelligent reflecting surface (IRS) is treated as a cutting-edge technology to boost spectrum and energy efficiency for future wireless communications. In this letter, multiple IRSs are deployed to obtain better… Click to show full abstract
Intelligent reflecting surface (IRS) is treated as a cutting-edge technology to boost spectrum and energy efficiency for future wireless communications. In this letter, multiple IRSs are deployed to obtain better performance of cell-edge users and group-level successive interference cancellation (GSIC) is conceived to distinguish the users’ signals of different groups. In order to get the minimum overall transmission power for IRS-assisted uplink multi-antenna non-orthogonal multiple access (NOMA) systems, all user’s transmission power and the IRSs’ phase shifts are jointly devised to achieve this goal. Particularly, a sequential rotation method is applied to optimize phase shifts effectively. It is clearly illustrated from simulation results that our proposed scheme can dramatically decrease total transmit power in comparison with a variety of benchmarking methods.
               
Click one of the above tabs to view related content.