An Adaptive Blind Channel Estimation for OFDM Systems with Multimedia by Enhanced H-Infinity Approach

The aim of this paper is to estimate the channel characteristics of OFDM communication system by using enhanced H_infin approach and comparing the result with existing Kalman channel estimator. This estimation criterion is different with Kalman filter. These two algorithms fail when high data is to be transmitted. In general, blind channel estimation method cannot handle multimedia services (high data rate). In order to estimate these high data rate, we are proposing this improved H-infinity approach. This improved H-infinity approach is proposed to overcome the drawback of kalman and H-infinity at overall SNR environment. At very Low SNR the characteristics of both H-infinity and Kalman gives the same performance. In order to improve this performance we are proposing this new estimation process, for handling High Data rates (multimedia services).