Nguyen Thi, N.; Phan Huy, A.; Nguyen Thi, H.; Do Thanh, Q.; Vu Hai, L.; Tran Quang, G.; Dinh Thi Thuy, D.; Pham Thanh, H. A Comparative Analysis of LS and MMSE Channel Estimation Techniques for Underwater Acoustic OFDM Systems. J. Mil. Sci. Technol. 2021, 40-46.