Center-Fed Pinching Antenna System (C-PASS) Aided Wireless Communications
Xu Gan, Yuanwei Liu

TL;DR
This paper introduces the C-PASS antenna system that enhances wireless communication by providing doubled degrees of freedom through controllable power splitting, with optimized protocols for improved sum-rate performance.
Contribution
It proposes a novel antenna architecture with three practical protocols and develops optimization algorithms for each, improving sum-rate performance in wireless systems.
Findings
TS outperforms in low-power regimes
PS and DS achieve higher rates in high-power regimes
Enhanced DoF improves overall system capacity
Abstract
The novel architecture of the center-fed pinching antenna system (C-PASS) is investigated, where the waveguide-fed signal is divided into two propagation directions through controllable power splitting. By doing so, a doubled degree of freedom (DoF) is achieved compared to conventional PASS. Based on the new designed basic signal model of C-PASS, three practical operating protocols for C-PASS are proposed, namely power splitting (PS), direction switching (DS), and time switching (TS). Then, the sum-rate maximization problem for the joint optimization of transmit and pinching beamforming is formulated for each of the proposed protocols. 1) For PS, the highly coupled non-convex problem is first transformed into a tractable form via the weighted minimum mean square error reformulation and solved using the alternating optimization framework; 2) For DS, the above approach is subsequently…
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Taxonomy
TopicsAdvanced MIMO Systems Optimization · Cooperative Communication and Network Coding · Antenna Design and Analysis
