Prof. Schober gives Talk on RSMA Webinar Series
This talk will focus on downlink MIMO systems where both the base station and the users are equipped with multiple antennas. While it is well known that dirty paper coding (DPC) is capacity achieving in such systems, practical high-performance transmission schemes offering favorable trade-offs between performance and complexity
are still under development, as most of the related literature has focused on single-antenna users. A key requirement for achieving such a favorable trade-off is the synergistic combination of linear precoding at the base station and
successive interference cancellation (SIC) at the users. In this talk, we present two different approaches to downlink
MIMO transmission. The first approach is based on MIMO-NOMA concepts and decomposes the MIMO channels of
the users into scalar sub-channels with and without inter-user interference via suitable precoding and decoding matrices. The second approach is based on MIMO-RSMA and employs a successive null-space precoder to control
the amount of inter-user interference experienced by the users. The performance of both schemes is compared to
DPC and various orthogonal and non-orthogonal benchmark schemes. These comparisons reveal that the proposed DPC and various orthogonal and non-orthogonal benchmark schemes.