DFT - based channel estimation for OFDM system and comparison with LS and MMSE over Rayleigh and Rician fading channel

  ijett-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2013 by IJETT Journal
Volume-4 Issue-9                      
Year of Publication : 2013
Authors : Jeevan Singh Parmar , Gaurav Gupta


Jeevan Singh Parmar , Gaurav Gupta. "DFT - based channel estimation for OFDM system and comparison with LS and MMSE over Rayleigh and Rician fading channel". International Journal of Engineering Trends and Technology (IJETT). V4(9):3877-3881 Sep 2013. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group.


Orthogonal Frequency Division multiplexing is a high data rate transmission scheme for wireless communication systems. The received signal is not only coming directly from the transmitter, but the combination of multipath components of transmitted signal. One of the most intriguing aspects in wireless communication is fading which is present when there are multipath components . To cancel the effect of fading , channel estimation is required at the receiving end. In this paper a DFT - based channel estimati on approach is simulated and comparing with conventional channel estimation techniques , Least Square (LS) and Minimum Mean Square Error (MMSE) over Rayleigh and Rician fading Channel . The simulation results show that DFT - based channel estimation technique reduces the Mean Square Error (MSE) and the performance of DFT - based is better than LS and MMSE.


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OFDM; DFT; MSE; Channel Estimation; LS; MMSE.