International Journal of Engineering Trends and Technology
In this paper, the authors review the work already done related to channel estimation technique in OFDM system. Pilot base channel estimation algorithm i.e. block type, comb type etc. are discussed and also compared in terms of their simplicity, computational cost and suitability conditions. After comparison with known techniques i.e. decision directed-Kalman based estimation, Maximum Likelihood (ML) method and two pilot-aided OFDM schemes, the iterative blind channel technique performs better for regions with mid to high Signal to Noise Ratio (SNR).