Today's world emerges with wireless communication technology. The network performance can be improved by using efficient signalling and receiver techniques to increases the data rate. As the data rate increases, the occurrence off channel interference is high. The channel estimator is preferred to detect and reduce the interference. Multi Input Multi Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) is implemented to enhance the high speed data transmission and to achieve high spectral efficiency. During signal transmission, the performance degradation caused due to inter carrier interference (ICI). To overcome the ICI, Normalized Minimum Mean Square Error (NMMSE) channel estimator provides high signal receiver rate and low bit error rate with less delay. The performance achievable rate increases and reduces channel attenuation. It also proved that the channel overhead is low due to high bandwidth at receiving end compared with the conventional estimators. © 2006-2017 Asian Research Publishing Network (ARPN).