Sparse Doubly-Selective Channel Estimation Techniques for OSTBC MIMO-OFDM Systems: A Hierarchical Bayesian Kalman Filter Based Approach. - Suraj Srivastava; Mahendrada Sarath Kumar; Amrita Mishra; Sanjana Chopra; Aditya K. Jagannatham; Lajos Hanzo (IEEE Trans. Commun., 2020)