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Statistical CSI-Based Design for Pinching Antenna Systems with Short-Packet Communication
Zian Pan1, Guansan Zheng2, Zixuan Xu2
1School of Materials & Energy, Lanzhou University, Lanzhou 730000, China.
Entropy (Basel, Switzerland)
|July 28, 2026
Summary
This study introduces a novel phase-domain Proximal Policy Optimization (PPO) for short-packet communication (SPC) antenna systems. The new method enhances the maximal achievable rate (MAR) and reduces block error rate (BLER) in wireless networks.
Area of Science:
- Wireless communication systems
- Antenna design and optimization
- Statistical signal processing
Background:
- Short-packet communication (SPC) requires efficient antenna systems for reliable data transmission.
- Maximizing the maximal achievable rate (MAR) under physical collision-avoidance constraints is a key challenge.
- Existing coordinate-based optimization methods face challenges with phase discontinuity.
Purpose of the Study:
- To design a statistical channel state information-based pinching antenna system for SPC.
- To maximize the average MAR under physical collision-avoidance constraints.
- To develop a novel phase-domain Proximal Policy Optimization (PPO) framework for stable learning and improved performance.
Main Methods:
- Formulation of a non-convex geometry optimization problem.
- Development of a novel phase-domain PPO framework operating in a dual-component trigonometric phase domain.
- Customized phase-domain action mapping to ensure stable learning.
- Derivation of a statistical characterization for received signal-to-noise ratio (SNR) using mixture Gamma approximation over Rician fading channels.
- Development of a bisection search algorithm to minimize blocklength under reliability constraints.
Main Results:
- The proposed phase-domain PPO scheme significantly outperforms conventional algorithms in terms of average MAR.
- The system achieves a lower average block error rate (BLER) compared to existing methods.
- Improved blocklength efficiency is demonstrated, with gains increasing with the number of antennas.
- A closed-form approximation for average BLER was derived, enabling accurate reliability evaluation.
Conclusions:
- The phase-domain PPO framework offers a superior approach for optimizing antenna systems in SPC.
- The proposed method effectively addresses phase discontinuity issues, leading to stable and efficient learning.
- The statistical characterization of SNR and BLER provides valuable insights into SPC reliability.
- This work contributes to advancing the performance of wireless communication systems, particularly for short-packet transmissions.
