DFT-based channel estimation for OFDM system and comparison with LS and MMSE over Rayleigh and Rician fading channel
Journal Title: INTERNATIONAL JOURNAL OF ENGINEERING TRENDS AND TECHNOLOGY - Year 2013, Vol 4, Issue 9
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 estimation 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.
Authors and Affiliations
Jeevan Singh Parmar, Gaurav Gupta
Keywords
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