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Downlink Performance Analysis of Pinching Antenna Systems...
[Submitted on 14 May 2026 (v1), last revised 1 Jul 2026 (this ve · 2026-05-15 · via eess.SP updates on arXiv.org

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Abstract:This paper presents an analytical framework for downlink pinching antenna systems (PASS) employing waveguide division multiple access (WDMA) and non-orthogonal multiple access (NOMA). A unified channel model is developed to capture antenna deployment, user spatial distribution, and path loss. Closed-form and single-integral expressions for the outage probability and average achievable rate are derived and validated via Monte Carlo simulations. The results show that NOMA achieves higher spectral efficiency at high transmit signal-to-noise ratio (SNR) due to successive interference cancellation (SIC), whereas WDMA offers more reliable performance at low to moderate SNR but suffers from an outage floor and rate saturation at high SNR. Moreover, WDMA performance is more sensitive to the user spatial distribution due to the spatially dependent inter-waveguide interference. These findings provide design insights for access-scheme selection and antenna placement in PASS.

Submission history

From: Han Zhang [view email]
[v1] Thu, 14 May 2026 17:38:31 UTC (181 KB)
[v2] Fri, 15 May 2026 15:21:46 UTC (181 KB)
[v3] Wed, 1 Jul 2026 14:17:38 UTC (181 KB)