Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Successive Decode-and-Forward Relaying with Reconfigurable Intelligent
  Surfaces   The key advantage of successive relaying (SR) networks is their ability to
mimic the full-duplex (FD) operation with half-duplex (HD) relays. However, the
main challenge that comes with such schemes is the associated inter-relay
interference (IRI). In this work, we propose a reconfigurable intelligent
surface (RIS)-enhanced SR network, where one RIS is deployed near each of the
two relay nodes to provide spatial suppression of IRI, and to maximize the gain
of desired signals. The resultant max-min optimization problem with joint
phase-shift design for both RISs is first tackled via the semidefinite
programming (SDP) approach. Then, a lower-complexity solution suitable for
real-time implementation is proposed based on particle swarm optimization
(PSO). Numerical results demonstrate that even relatively small RISs can
provide significant gains in achievable rates of SR networks, and the proposed
PSO scheme can achieve a near optimal performance.

19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin