Joint Segment Activation and Antenna Placement for Uplink SWAN Systems

TL;DR

This paper investigates the sum-rate performance of uplink SWAN systems, deriving an upper bound, establishing an optimal segment activation level, and proposing hybrid schemes with greedy algorithms to optimize segment activation and antenna placement.

Contribution

It introduces a theoretical upper bound on sum-rate, proves the existence of an optimal segment activation level, and develops hybrid schemes with low-complexity algorithms for joint optimization.

Findings

Proposed HSS/A schemes outperform conventional full-segment aggregation.

Derived an upper bound on achievable sum-rate.

Established the existence of an optimal segment activation level.

Abstract

This article analyzes the achievable sum-rate of multiuser uplink segmented waveguide-enabled pinching-antenna systems (SWANs). To unveil system-design insights, an upper bound on the achievable sum-rate is derived, based on which the existence of an optimal segment activation level is theoretically established. Motivated by this result, hybrid segment selection and aggregation (HSS/A) schemes are proposed to jointly optimize segment activation and pinching-antenna (PA) placement. Correspondingly, low-complexity greedy algorithms are developed for the considered optimization problem. Numerical results validate the theoretical analysis and demonstrate that the proposed HSS/A schemes outperform conventional full-segment aggregation.