Inter-Cell Interference Mitigation for Time of Arrival Estimation in LTE Positioning

In this paper, the effect of inter-cell interference to the correlation of Long Term Evolution positioning reference signals' for time of arrival estimation is analyzed. First, the expectation of inter-cell interference power in ToA estimation is derived. After that, a simple scheme to remove inter-cell interference is proposed by sacrificing signal power and provide a metric when the proposed scheme outperforms conventional correlation based scheme in terms of inter-cell interference power. The simulation results show that the proposed scheme outperforms the conventional correlation based scheme in most of scenarios.