Sparse Bayesian Learning-Based Hierarchical Construction for 3D Radio Environment Maps Incorporating Channel Shadowing. - Jie Wang; Qiuming Zhu; Zhipeng Lin 001; Junting Chen; Guoru Ding; Qihui Wu 001; Guochen Gu; Xiqi Gao 001 (IEEE Trans. Wirel. Commun., 2024)