This letter investigates the covert performance of a pinching-antenna system (PASS) assisted non-orthogonal multiple access (NOMA) network in a heterogeneous propagation environment. In the considered setup, a pinching antenna is deployed along a dielectric waveguide to flexibly control the radiation position and enhance spatial diversity. Two non-colluding user-specific wardens located in different regions attempt to detect the covert transmission of the legitimate NOMA users. Closed-form expressions for the false alarm probability and missed detection probability for an individual warden are derived by exploiting the statistical properties of the PASS geometry and the Gaussian–Chebyshev quadrature method, based on which the corresponding detection error probability (DEP) is obtained. Numerical results demonstrate that PASS-assisted NOMA significantly improves covert communication performance and increases the warden’s detection uncertainty compared with conventional antenna systems (CASS) assisted NOMA and PASS-assisted orthogonal multiple access (OMA). Furthermore, the impact of imperfect channel state information (CSI) at the wardens on the covert detection performance is also analyzed.
This paper investigates secure near-field integrated sensing and communication (ISAC) with pinching-antenna systems (PASS), where a base station serves legitimate users while localizing a target that may also eavesdrop on the transmitted data. We jointly design symbol-level precoding (SLP) and the transmit and receive...
Dimitrios Bozanis, V. Papanikolaou, Sotiris A. Tegos et al.· 1 citation
By adjusting antenna parameters, flexible antenna systems can dynamically reconfigure wireless channel characteristics to improve system performance. Non-orthogonal multiple access (NOMA) is a promising multiple access technique for enhancing the spectral efficiency and connectivity of next-generation wireless systems....
This paper proposes a pinching antenna system (PASS)-assisted downlink quadrature rate-splitting multiple access (Q-RSMA)-based integrated sensing and communication (PASS-QRSMA-ISAC) framework for simultaneously supporting multi-user communication and target sensing. In the proposed framework, multiple pinching antenna...
Sagnik Bhattacharyya, Shiv Kumar, Keshav Singh et al.· IEEE Transactions on Communi...· 2 citations
Numerical results demonstrate that: 1) Eve's velocities and positions can be accurately tracked with the proposed two-timescale framework in both multiple- and single-waveguide scenarios; and 2) PASS achieves superior secrecy rate compared to conventional multiple-antenna benchmarks.
Haowen Song, Jing-Jing Zhao, Xi-Dong Mu et al.· 1 citation
Pinching-antenna systems (PASS) create reconfigurable wireless channels by moving dielectric antennas along a waveguide. Mechanical position errors translate into phase errors that degrade performance, yet almost all prior PASS studies assume ideal placement. This paper models this position error, derives the resulting...
Pinching-antenna systems have emerged as a novel promising technology for sixth-generation networks, capable of enhancing spectral efficiency by dynamically creating radiation points and line-of-sight links along a dielectric waveguide. However, the power consumption of such reconfigurable systems remains a critical ch...
Wen-Qi Huang, Yu-Shen Lin, K. C. Teh et al.· IEEE Transactions on Communi...· 0 citations
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