In this paper, the authors evaluate the performance of improved power delay profile estimation in Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems under Linear Minimum Mean Square Error (LMMSE) channel. The distortions caused by null subcarriers and a short range of samples for PDP estimation is also considered. The proposed technique effectively estimates the distortions caused by PDP. Simulation results show that the performance of extended Kalman filtering estimation using the different PDP is more appropriate. The output is compared against different antenna system and with different delay profiles along with the conventional LMMSE.