R. Jeya, B.Amutha, Roshni Patra, Rishav Ghosh. 2020. “Channel Estimation for MIMO OFDM Systems Using LS and MMSE Channel Estimation Techniques”. International Journal of Advanced Science and Technology 29 (08), 263 -72. http://sersc.org/journals/index.php/IJAST/article/view/17010.