Abstract
The deployment of increasingly dense heterogeneous mobile networks can create high levels of interference among users that, combined with severely time-dispersive channels, can result in substantial performance degradation. To cope with both effects, in this paper, we propose an iterative block decision feedback equalizer (IBDFE) for single carrier (SC) transmissions that makes use of the correlation between the interference in the receiving antennas and minimizes the mean squared error (MSE) of the detected symbols. Our analytic and simulated performance results show that the proposed receiver can clearly outperform the conventional IBDFE and the linear interference rejection combining (IRC) detector in severely time-dispersive channels with strong cochannel interference.
Highlights
The increasing demand for higher data rates in wireless services requires a continuous improvement of broadband wireless communication systems in order to deal with the limited spectrum resources, dispersion of the channel and interference between users
One interferer contributing with an interference over thermal (IoT) level of 12dB was considered and two receive antennas sufficiently spaced apart so that they can be assumed uncorrelated were used
We can see that the interference aware iterative block decision feedback equalizer (IBDFE) is able to achieve a substantial performance improvement over the linear interference rejection combining (IRC)
Summary
The increasing demand for higher data rates in wireless services requires a continuous improvement of broadband wireless communication systems in order to deal with the limited spectrum resources, dispersion of the channel and interference between users. In order to tackle the intersymbol interference (ISI) caused by the channel time dispersion, most of the emergent wireless systems employ either orthogonal frequency division multiplexing (OFDM) [1] or SC [2] transmission techniques. This is the author's version of an article that has been published in this journal. It is shown that the proposed receiver outperforms both the conventional IBDFE and linear IRC detectors in severely time-dispersive channels with strong cochannel interference.
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