An ICI reduction scheme with enhanced frequency diversity for OFDM systems

Abstract

We analyze the frequency diversity of intercarrier interference (ICI) reduction methods in the presence of phase noise over multipath fading channels. Based on analysis, we propose an enhanced symmetric data conjugate (ESDC) method to exploit the frequency diversity in multipath fading channel. We derive carrier-to-interference ratio (CIR) expression of proposed ICI reduction scheme. The BER performance of the proposed system is compared with conventional ICI reduction methods such as adjacent data conjugate and symmetric data conjugate methods. Simulation results show that the proposed ICI reduction scheme provides an improvement in BER performance over a fading channel and it is also better than conventional ICI reduction techniques in the presence of ICI due to phase noise.