Abstract: Recent mobile telecommunication systems are using MIMO collective with OFDM, which is well-known as MIMO-OFDM, to offer robustness and higher spectrum efficiency. The most important challenge in this scenario is to achieve an accurate channel estimation to identify the information symbols, once the receiver must have the channel state information to balance and process the received signal. The main objective of this paper is to study various techniques and analyze for channel estimation in MIMO-OFDM systems.

Keywords: MIMO-OFDM, channel estimation, LS, MMSE, interpolation, LS-Spline