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

Jeevan Singh Parmar; Gaurav Gupta

doi:https://doi.org/10.14445/22315381/IJETT-V4I9P134

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Volume 4 | Issue 9 | Year 2013 | Article Id. IJETT-V4I9P134 | DOI : https://doi.org/10.14445/22315381/IJETT-V4I9P134

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

Jeevan Singh Parmar , Gaurav Gupta

Citation :

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), vol. 4, no. 9, pp. 3877-3881, 2013. Crossref, https://doi.org/10.14445/22315381/IJETT-V4I9P134

Abstract

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.

Keywords

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

References

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