Nguyen Thi, N., Phan Huy, A., Nguyen Thi, H., Do Thanh, Q., Vu Hai, L., Tran Quang, G., Dinh Thi Thuy, D. and Pham Thanh, H. 2021. A comparative analysis of LS and MMSE channel estimation techniques for underwater acoustic OFDM systems. Journal of Military Science and Technology. CBNCT (Nov. 2021), 40–46.