A Statistical Block Fading Channel Model for Multiuser Massive MIMO System

This paper presents a statistical block fading channel model for multiuser massive MIMO system. The proposed channel model acts as correlation based stochastic channel model (CBSCM) to simulate correlation in time/frequency and simultaneously captures spatial variations as geometry based stochastic channel model (GBSCM), using three controlling parameters: one parameter describes variation in channel along resource block (along time/frequency) and the remaining two parameters describe spatial variations in the channel. The model has been validated with reported experimental data of channel for massive MIMO. The presented channel model preserves essential channel statistics like mobility of mobile terminal, cross user correlation and angular power distribution at base station antenna array, while offering significantly lower complexity as compared to GBSCM. The presented analysis captures previously unreported spatial determinism, the basic cause of unfavorable propagation in multiuser massive MIMO communications. The work also highlights hidden advantages of spatial determinism in channel for multiuser massive MIMO.