Inter Carrier Interference mitigation in OFDM system using Kalman Filter Channel Estimation
نویسنده
چکیده
Orthogonal frequency division multiplexing (OFDM) is one of the modulation scheme, used for high speed mobile communication. However, fast time varying multipath channels leads to loss of orthogonality of subcarriers and introduces inter carrier interference (ICI). In this study, MMSE equalizer is implemented to remove ICI. The information of Channel Impulse Response (CIR) required for equalizer is estimated on every subcarrier using time domain Kalman Filter. In further study, decision feedback equalizer will be implemented of which performance will be compared on the basis of bit error rate (BER) with that of MMSE equalizer. Keywords—OFDM,Inter Carrier Interference,Channel Impulse Response,Kalman filter, MMSE equalizer, BER
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