Analytical outage and coverage performance analysis of cell-free massive MIMO system based on radio stripe

摘要

Cell-free mMIMO (massive multiple input multiple output) is slated to be beyond 5G (B5G) wireless technology, given the attractive features it offers, higher spectral efficiency, higher-energy efficiency, and superior spatial diversity. However, large numbers of long cables between each access point (AP) and central processing unit (CPU) (front haul requirements) mar its practical adoption. Radio stripe is one such architecture of cell-free mMIMO suitable for practical deployment. In this work, we derive the closed-form expression of probability of outage in the uplink of Cell-Free mMIMO System Based on Radio Stripe (CFMMSBRS) and coverage probability in the downlink of CFMMSBRS, respectively. We employ, Welch-Satterthwaite approximation for accurate approximation of sum of independent gamma random variables with different shape and rate parameter. Results indicate that both outage and coverage achieved good performance especially when numbers of APs L in radio stripe network are greater than numbers of user equipments (UEs) K in the network.