Training Based Channel Estimation in OFDM Systems

Abstract

Abstract-In this paper the Proposed new scheme in order to implement an MMSE Channel estimator for an OFDM System we know that the time domain maximum likelihood estimators (MSE) Can achieve highly accurate impulse response estimation by using time domain long preamble of an OFDM frame. The Least Square algorithm is easier for the channel estimation. The impulse response estimation based on the minimum mean square error (MMSE) Criterion can achieve superior channel estimation in low SNR conditions.