A Study on Inter-cell Interference Suppression using Nulling Filter and SC/MMSE based Turbo Equalizer for Broadband Single-carrier Transmission Scheme in Uplink TDMA Systems

摘要

This paper proposes an inter-cell interference (ICI) suppression technique for broadband single-carrier transmission systems in the uplink. In the proposed scheme, frequency domain nulling filter is employed to suppress high level interference components followed by soft canceller and a minimum mean square error (SC/MMSE) based turbo equalizer to compensate not only for channel induced inter-symbol interference (ISI) but also extra ISI produced by the nulling filter. Computer simulation confirms that the proposed scheme is effective in suppression of ICI compared to the conventional linear frequency domain equalizer.