Chaojin Qing Zilong Wang Qing Ye Wenhui Liu Jiafan Wang 0002 Xi Cai GatS-Net: GAT-Based Superimposed CSI Feedback. 536-548 2025 June 9 IEEE Trans. Green Commun. Netw. 2 https://doi.org/10.1109/TGCN.2024.3451247 db/journals/tgcn/tgcn9.html#QingWYLWC25 streams/journals/tgcn