Reduction of Inter Carrier Interference using Extended Kalman Filter in OFDM Systems for Different Channel Models
Journal Title: International Journal of Science and Research (IJSR) - Year 2013, Vol 2, Issue 7
Abstract
Orthogonal Frequency Division Multiplexing (OFDM) is a multirate data transmission technique. The main drawback of OFDM is, its sensitivity to frequency offset in the channel, which may be caused by Doppler shift in the channel. This introduces loss of Orthogonality of Carrier Signals. Intercarrier Interference (ICI) occurs due to the loss of Orthogonality. The bit error rate (BER) increases rapidly with increasing frequency offsets. This is a main restriction in OFDM systems. The existing approaches to reduce ICI can be categorized as frequency-domain equalization, time
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