Cramér-Rao Bounds for Integrated Sensing and Communications in Pinching-Antenna Systems
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912358092242944 |
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| author | Bozanis, Dimitrios Papanikolaou, Vasilis K. Tegos, Sotiris A. Karagiannidis, George K. |
| author_facet | Bozanis, Dimitrios Papanikolaou, Vasilis K. Tegos, Sotiris A. Karagiannidis, George K. |
| contents | Pinching-antenna systems (PASs) have recently emerged as a flexible, cost-effective route to large-scale antenna deployments envisioned for integrated sensing and communications (ISAC). This paper establishes the fundamental sensing limits of a bistatic PAS link by deriving closed-form Cramér-Rao lower bounds for the joint estimation of range and direction when a target is illuminated by pinching antennas placed along a dielectric waveguide and observed by a uniform linear array receiver. By rigorously preserving the amplitude and phase variations of each pinching antenna, as well as exploiting their non-uniform deployment, we gain valuable insights into the performance gain of PASs over conventional antenna arrays. Numerical results validate that the PAS-based ISAC can achieve centimeter-level ranging and sub-degree angular resolution with significantly fewer hardware resources than conventional uniform linear arrays. The derived bounds provide practical design guidelines for next-generation PAS-enabled ISAC systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_01333 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cramér-Rao Bounds for Integrated Sensing and Communications in Pinching-Antenna Systems Bozanis, Dimitrios Papanikolaou, Vasilis K. Tegos, Sotiris A. Karagiannidis, George K. Signal Processing Pinching-antenna systems (PASs) have recently emerged as a flexible, cost-effective route to large-scale antenna deployments envisioned for integrated sensing and communications (ISAC). This paper establishes the fundamental sensing limits of a bistatic PAS link by deriving closed-form Cramér-Rao lower bounds for the joint estimation of range and direction when a target is illuminated by pinching antennas placed along a dielectric waveguide and observed by a uniform linear array receiver. By rigorously preserving the amplitude and phase variations of each pinching antenna, as well as exploiting their non-uniform deployment, we gain valuable insights into the performance gain of PASs over conventional antenna arrays. Numerical results validate that the PAS-based ISAC can achieve centimeter-level ranging and sub-degree angular resolution with significantly fewer hardware resources than conventional uniform linear arrays. The derived bounds provide practical design guidelines for next-generation PAS-enabled ISAC systems. |
| title | Cramér-Rao Bounds for Integrated Sensing and Communications in Pinching-Antenna Systems |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2505.01333 |