3 papers
cs.IT2024
Space-Air-Ground Integrated Networks: Their Channel Model and Performance Analysis
Chao Zhang, Qingchao Li, Chao Xu +2
Given their extensive geographic coverage, low Earth orbit (LEO) satellites are envisioned to find their way into next-generation (6G) wireless communications. This paper explores…
cs.IT2023
Reconfigurable Intelligent Surface Aided Amplitude- and Phase-Modulated Downlink Transmission
Qingchao Li, Mohammed El-Hajjar, Ibrahim Hemadeh +3
New reconfigurable intelligent surface (RIS) based amplitude and phase modulation schemes are proposed as an evolution how the phase-only modulation schemes available in the litera…
cs.IT2023
Performance Analysis of Active RIS-aided Systems in the Face of Imperfect CSI and Phase Shift Noise
Qingchao Li, Mohammed El-Hajjar, Ibrahim Hemadeh +3
The linear minimal mean square error (LMMSE) estimator for active reconfigurable intelligent surface (RIS)-aided wireless systems is formulated. Furthermore, based on the moment-ma…