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arXiv · 2606.09095

Joint Antenna Placement and Power Allocation for RSMA-Enabled Pinching Antenna Systems

Harsh Raj·Mallena Vardhan·Keshav Singh·Sudip Biswas
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Abstract

This letter investigates a rate-splitting multiple access (RSMA)-enabled multi-user pinching antenna system (PASS). A fairness-aware sum-rate maximization problem is formulated to jointly optimize pinching antenna locations and common/private stream power allocation. The resulting mixed discrete-continuous non-convex problem is addressed using an alternating optimization framework that combines greedy antenna placement with successive convex approximation (SCA)-based power allocation. Numerical results demonstrate that the proposed RSMA-enabled PASS significantly improves achievable sum-rate, user fairness, and bit error rate (BER) performance compared with conventional non-RSMA PASS schemes.

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Harsh Raj, Mallena Vardhan, Keshav Singh, Sudip Biswas. 2026-06-08. Joint Antenna Placement and Power Allocation for RSMA-Enabled Pinching Antenna Systems. https://arxiv.org/abs/2606.09095

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