Haeb-Umbach, Reinhold, and Maik Bevermeier. “OFDM Channel Estimation Based on Combined Estimation in Time and Frequency Domain.”10.1109/ICASSP.2007.366526__IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2007), vol. 3, 2007, pp. III-277-III–280, doi:10.1109/ICASSP.2007.366526.