On Eigenvalue Distribution of Imperfect CSI in mmWave Communications

Imperfect Channel State Information (CSI) reduces communication performance of mmWave communication that uses massive antennas. The knowledge of eigenvalue distribution of the imperfectly estimated CSI between transmitter (TX) and users' antennas is key to techniques that suppress the impact of imperfect CSI on communication performance. This paper numerically depicts that this distribution follow a power-law distribution. In addition, this paper investigates the impact of channel estimation error, the number of antenna elements at TX and users, and the number of users on the eigen value distribution.