کنفرانس مهندسی برق ایران

صفحه اصلی / بیست و نهمین کنفرانس مهندسی برق ایران

User Management in Cell-Free Massive MIMO Systems with Limited Fronthaul Capacity

نویسندگان :

Siminfar Samakoush Galougah¹ Hamed Masoumi² Mohammad Javad Emadi³

1- دانشگاه صنعتی امیرکبیر 2- صنعتی امیرکبیر (پلی تکنیک تهران) 3- صنعتی امیرکبیر (پلی تکنیک تهران)

کلمات کلیدی :

Cell-free massive MIMO, limited capacity fronthaul, spectral efficiency

چکیده :

In cell-free (CF) massive multiple-input multipleoutput (MIMO) architecture, large number of access points (APs) collaboratively serve much smaller number of users. Conventionaly, it is assumed that each AP serves all users. In this work, however, to lessen the computation and hardware costs, instead of serving all users, each AP serves limited number of them. We propose an algorithm for assigning users to each BS. Besides, we assume each AP is connected to a central processing unit (CPU) via limited capacity fronthaul link. To efficiently address the fronthaul capacity constraints, three strategies for sending signals from APs to the CPU are employed; namely: compressforward-estimate (CFE), estimate-compress-forward (ECF), and estimate-multiply compress-forward (EMCF). We drive the capacity of the aforementioned systems with user management. It is shown that user management improves the performance of the ECF and EMCF from sum spectral efficiency(SE) and SE per user perspective.