  In this correspondence, a novel simultaneous transmitting and reflecting
(STAR) reconfigurable intelligent surfaces (RISs) design is proposed in a
non-orthogonal multiple access (NOMA) enhanced coordinated multi-point
transmission (CoMP) network. Based on the insights of signal-enhancement-based
(SEB) and signal-cancellation-based (SCB) designs, we propose a novel
simultaneous-signal-enhancement-and-cancellation-based (SSECB) design, where
the inter-cell interferences and desired signals can be simultaneously
eliminated and boosted. Our simulation results demonstrate that: i) the
inter-cell interference can be perfectly eliminated, and the desired signals
can be enhanced simultaneously with the aid of a large number of RIS elements;
ii) the proposed SSECB design is capable of outperforming the conventional SEB
and SCB designs.
