In this letter, three novel spatial modulation (SM) schemes specifically designed for pinching-antenna systems (PASS) are proposed, offering a flexible trade-off between bit error rate (BER) performance and decoder computational complexity. The proposed one-dimensional quadrature SM (1D-QSM) scheme exploits dual waveguides to independently transmit the orthogonal symbol components to eliminate mutual interference. Meanwhile, the 2D-QSM and 2D-generalized SM (2D-GSM) schemes jointly utilize waveguide and pinch indices to enhance spectral efficiency. Results demonstrate that 1D/2D-QSM schemes achieve significantly lower computational complexity and superior BER performance at low spectral efficiencies compared to existing literature and the proposed 2D-GSM. In contrast, 2D-GSM provides enhanced reliability at high spectral efficiencies, outperforming both existing literature and the proposed 1D/2D-QSM schemes. Finally, analytical upper bounds for BER and decoder computational complexity are rigorously derived and validated through simulations.
This paper proposes a novel cyclic-prefixed single-carrier transmission scheme that amalgamate a reconfigurable intelligent surface (RIS) with spatial modulation in the frequency-selective fading channel. The discrete-input continuous-output memoryless channel's~(DCMC) capacities…
Reliable monitoring of hydroelectric generators requires descriptors that capture both electrical loading and electromagnetic field behavior. This work investigates operating-regime identification in the Porjus U9 10-MW Kaplan hydrogenerator using synchronized measurements from t…
Grant-Free (GF) random access is promising for low Earth orbit satellite Internet due to its reduced access latency. However, existing schemes suffer from poor performance in massive connectivity scenarios. To address this challenge, we firstly propose an iterative residual feedb…
Three-dimensional (3D) radio map (RM) is a key enabler for environment-aware communications in low-altitude wireless scenarios by providing site-specific channel priors indexed by spatial locations. However, existing 3D RM construction methods lack effective modeling of the heigh…
Affine frequency division multiplexing (AFDM) has emerged as a promising waveform for next-generation integrated sensing and communication (ISAC) systems. However, it becomes challenging to improve spectral efficiency while simultaneously obtaining accurate channel and sensing-re…
This letter presents the design and operation of an electronically reconfigurable pinching antenna (E-pinching antenna) and examines its capability to establish controllable millimeter-wave links that can circumvent blockages. The antenna consists of a low-loss rectangular dielec…