ENHANCED BER ANALYSIS AND MITIGATION OF ICI IN SFBC-OFDM SYSTEMS

SFBC-OFDM signals usage is advantageous in high-mobility broadband wireless access, where the channel is highly time as well as frequency-selective because of which the receiver experiences both ISI and ICI. ISI occurs due to the violation of the `quasi-static' fading assumption caused due to frequency- and/or time-selectivity of the channel. In addition, ICI occurs due to time-selectivity of the channel which results in loss of orthogonality among the subcarriers [1]. In this paper, we are concerned with the detection of SFBC-OFDM signals on time and frequency-selective MIMO channels. In this work, we investigate interference cancellation techniques to mitigate the effects of ICI induced by time-selectivity and ISI induced by frequency-selectivity of the channel. This paper is organized as follows. In Section I, we investigated the enhanced performance analysis of SFBC-OFDM system. In Section II, we presented the SFBC-OFDM system model. In Section III, we presented the proposed interference cancellation algorithm for the considered SFBC-OFDM system. Results and discussions are presented in Section IV. Conclusion is given in Section V.