Journal Title : International Journal of Modern Trends in Engineering and Science


Author’s Name : Sivaranjani R  unnamed

Volume 03 Issue 07 2016

ISSN no:  2348-3121

Page no: 161-164

Abstract – The channel estimation in high mobility OFDM system is long standing challenging. Therefore proposed scheme uses Doppler spread information and estimates the data symbols during estimation process. To accurately estimate the channel some of the sub-carriers are used as pilot symbols, data symbols and remaining are used as unused symbols in OFDM modulation.  Here adaptive estimators like Minimum Square Error (MSE) are used to refine the channel estimation, where the performance is better compared to the existing Least Square (LS), and MMSE method. The comb type pilot symbols used for the channel estimation. In addition, it is also shown that the proposed scheme is robust to high mobility.    

Keywords— Maximum likelihood ,Least Square ,MMSE method, OFDM system, MIMO OFDM system  


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