Performance analysis of phase noise impaired OFDM systeminamultipath fading channel

OrthogonalFrequency Division Multiplexing (OFDM)is becoming the chosen modulation technique for wireless communications. Multicarrier modulation shows a significant sensitivity to the phase noise present in the oscillator used for frequency down-conversion at the portable receiver. For this reason, it is important to evaluate the impact of the phase noise on the system performance.In this paper, the performance of phase noise impaired OFDM system over a multipath frequency selective and time varying fading channel is analyzed, in terms of Mean Square Error (MSE)and Bit Error Rate (BER). The analysis shows a degradation of the MSE and BER caused by the addition of phase noise at the transmitter and receiver end of the OFDM communication link. This performance degradation is evaluated from the graphs of MSE and BER against Signal to Noise Ratio (SNR). The simulation is performed using MatLab and the results show a good agreement with analytical expressions.