Pilot contamination mitigation based on antenna subset transmission for mmWave massive MIMO

Abstract

This paper tackles the problem of pilot contamination (PC) in mmWave Mas- sive MIMO cellular systems. We propose an analog precoder based on antenna subset transmission technique to mitigate the PC. This technique ensures the interfering signal to become noise-like signal thus helping a more efficient estimation of channel coefficients. Also, this strategy is low cost and introduces no complexity load. The result shows the effectiveness of the proposed precoder to mitigate PC issue