A Scheme for Cancelling Intercarrier Interference using Partial Response Encoding for MIMO-OFDM Systems

Multiple-input multiple-output (MIMO) antennas combined with orthogonal frequency division multiplexing (OFDM) are very attractive for high data rate communications. However, MIMO-OFDM systems are very vulnerable to time selective fading as channel time variation destroys the orthogonality among subcarriers, causing serious intercarrier interference (ICI). In this paper, we employ optimal frequency domain partial response coding (PRC) in MIMO-OFDM systems over frequency selective, fast fading channels to mitigate ICI. We focus on deriving, via an analytical approach, a tractable, closed-form expression of carrier-to-interference ratio (CIR) to quantify the impact of time selective fading and demonstrate the effectiveness of PRC in mitigating ICI in MIMO-OFDM systems. From the numerical results, PRC can effectively increase CIR and the improvement is proportional to the number of subcarriers and the coding length.