  The fundamental limitation of massive MIMO technology is pilot contamination
effect. This effect occurs during uplink training when terminals use the same
orthogonal signals. In this paper, a pilot reuse factor with large scale fading
precoding is proposed to mitigate the pilot contamination effect. The pilot
reuse factor is designed to assign unique orthogonal signals to the adjacent
cells. These unique orthogonal signals are reused only within the cell and
hence, intra-pilot contamination is the only concern. Large scale fading
precoding is then used to mitigate the intra-pilot contamination effect. The
average achievable sum rate is computed for different pilot reuse factors.
Experimental results through MATLAB simulation show that a higher pilot reuse
factor gives better average achievable sum rates.
