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LoS Blockage in Pinching-Antenna Systems: Curse or Blessing?
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This letter is to investigate the impact of line-of-sight (LoS) blockage on pinching-antenna systems. Analytical results are developed for both single-user and multi-user cases to reveal that the presence of LoS blockage is beneficial for increasing the performance gain of pinching antennas over conventional antennas. This letter also reveals that LoS blockage is particularly useful in multi-user cases, where co-channel interference can be effectively suppressed by LoS blockage.
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Cited by 11 Pith papers
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Capacity Characterization of Pinching-Antenna Systems
This paper characterizes the two-user capacity region of pinching-antenna systems, proving their capacity region contains that of fixed-antenna systems and that TDMA and FDMA are nearly optimal in the multiple-pinch case.
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Beamforming Design for Pinching Antenna Systems with Multiple Receive Antennas
A two-layer placement algorithm for pinching antennas that aligns signals across multiple receive antennas improves rate over single-antenna-oriented schemes, especially at close range.
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Joint Transmission for Cellular Networks with Pinching Antennas: System Design and Analysis
Closed-form average SNRs and gain thresholds for three coordination levels of joint base-station and pinching-antenna transmission show full cooperation always helps while the cheaper schemes help only under favorable...
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Rate Region of ISAC for Pinching-Antenna Systems
For a pinching-antenna ISAC system, the paper derives the closed-form communication-sensing rate region with one pinch and inner and outer bounds with multiple pinches, claiming it contains the fixed-antenna region.
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Pinching-Antenna Systems for Physical Layer Security
A Shapley-value-based coalitional game algorithm selects pinching antennas to boost legitimate-user signal and suppress eavesdropper reception, improving simulated secrecy rates.
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Deep Learning Optimization of Two-State Pinching Antennas Systems
A graph neural network with distributed attention selects near-optimal subsets of active pinching antennas, matching a Gurobi solver's rates within a few percent and generalizing from 50 to 1000 antennas.
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Joint Beamforming for NOMA Assisted Pinching Antenna Systems (PASS)
A NOMA-assisted pinching antenna system with jointly optimized antenna positions, transmit beamforming, and power allocation is simulated to reduce downlink transmit power by over 95% versus a fixed massive MIMO-NOMA ...
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OFDMA for Pinching Antenna Systems
A fixed multi-pinching-antenna downlink is modeled as a finite-impulse-response channel, and an OFDMA max-min subcarrier and power allocation is shown by simulation to raise the worst-user rate over single-carrier baselines.
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Antenna Activation and Resource Allocation in Multi-Waveguide Pinching-Antenna Systems
A resource allocation scheme for multi-waveguide pinching-antenna NOMA systems with discrete, pre-configured antenna positions achieves higher sum rate and lower outage than OMA and single-waveguide baselines.
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Analytical Optimization for Antenna Placement in Pinching-Antenna Systems
For fairness-based OMA, the optimal pinching-antenna location is the mean of users' x-coordinates and does not depend on their distance from the waveguide; for NOMA it moves exponentially toward the user nearest the w...
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A Gradient Meta-Learning Joint Optimization for Beamforming and Antenna Position in Pinching-Antenna Systems
A gradient meta-learning algorithm with two unrolled neural networks jointly optimizes beamforming and pinching-antenna positions, reporting 5.6 bits/s/Hz weighted sum rate and a 32.7% gain over alternating optimizati...
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