Special Issue Article Open Access

Kalman Filter Channel Estimation Based Inter Carrier Interference Cancellation techniques In OFDM System

Abstract

Orthogonal frequency division multiplexing (OFDM) is one of the modulation scheme, used for high speed mobile communication. However, fast time varying multipath channels lead to loss of orthogonality of subcarriers causing inter carrier interference (ICI) in OFDM signal. In this paper, MMSE and DFIC (Decision Feedback ICI Cancellation) equalizers are implementedtoremove ICI. The information of Channel Impulse Response (CIR) required for equalizing the OFDM signal is estimated on every subcarrier using time domain Kalman Filter. The performance of MMSE and DFIC equalizers are compared on the basis of bit error rate (BER) of equalizers.

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