Graph Attention Networks for Channel Estimation in RIS-assisted Satellite IoT Communications. (arXiv:2104.00735v2 [cs.NI] UPDATED)

Direct-to-satellite (DtS) communication has gained importance recently to
support globally connected Internet of things (IoT) networks. However,
relatively long distances of densely deployed satellite networks around the
Earth cause a high path loss. In addition, since high complexity operations
such as beamforming, tracking and equalization have to be performed in IoT
devices partially, both the hardware complexity and the need for high-capacity
batteries of IoT devices increase. The reconfigurable intelligent surfaces
(RISs) have the potential to increase the energy-efficiency and …

arxiv attention communications graph iot networks satellite