This paper investigates a stacked intelligent metasurface (SIM)-enabled spatial domain index modulation framework. We propose a phase-regulated SIM-enabled spatial domain index modulation (SIM-SDIM) scheme, where spatial bits are mapped onto programmable phase-state combinations of multiple SIM layers. The cascaded SIM...
Chao Liu, Jian-Kun Qi, Xin-Yu Wang et al.· 2026 IEEE/CIC International...· 0 citations
Due to the openness of wireless propagation, physical information transmissions remain vulnerable to electromagnetic interferences and adverse eavesdropping. Against this background, this paper investigates a fluid-antenna (FA) base-station and passive RIS enabled novel secure joint transmitter receiver spatial modulat...
Chao Liu, Nuo Li, Mi Liang et al.· 2026 IEEE/CIC International...· 0 citations
This paper investigates an air-to-ground two phase covert transmission (AtG-TPCT) system, which is associated with an unmanned aerial vehicle transmitter Alice (UAV-A), a fullduplex UAV relay (UAV-R) and multiple uncertainly located wardens. Accordingly, given the bounded location uncertainty of wardens, we formulate a...
Chao Liu, Xian-Wei Ke, Hao-Tian Wang et al.· 2026 IEEE/CIC International...· 0 citations
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