Review Paper on Adaptive Channel Estimation Technique in MIMO-OFDM System

Sandip Ukarde, Prof Dongre
Multiple Input Multiple Output (MIMO) in combination with Orthogonal Frequency Division Multiplexing (OFDM) can provide spectrally efficient and ISI free communication. Channel estimation is of great importance in order to recover the signal at the receiver side. Therefore accurate channel state information is essential for proper detection and decoding in MIMO-OFDM wireless systems. To estimate channel state information various types of techniques are being deployed in these systems. Accuracy
more » ... systems. Accuracy and precision of channel estimation depends on the techniques used for the purpose of estimating channel state information. The more accuracy of the technique more will be the accurate performance of the system. In this paper an enhanced adaptive channel estimation using normalized least mean square (NLMS) technique has been proposed. This technique provides better performance which can be judged by the BER performance compared than the previous algorithm i.e. least mean square (LMS) and recursive least square (RLS).