Downlink Power Control in Massive MIMO Networks with Distributed Antenna Arrays

Abstract

In this paper, we investigate downlink power control in massive multiple-input multiple-output (MIMO) networks with distributed antenna arrays. The base station (BS) in each cell consists of multiple antenna arrays, which are deployed in arbitrary locations within the cell. Due to the spatial separation between antenna arrays, the large-scale propagation effect is different from a user to different antenna arrays in a cell, which makes power control a challenging problem as compared to conventional massive MIMO. We assume that the BS in each cell obtains the channel estimates via uplink pilots. Based on the channel estimates, the BSs perform maximum ratio transmission for the downlink. We then derive a closed-form spectral efficiency (SE) expression, where the channels are subject to correlated fading. Utilizing the derived expression, we propose a max-min power control algorithm to ensure that each user in the network receives a uniform quality of service. Numerical results demonstrate that, for the network considered in this work, optimizing for max-min SE through the max-min power control improves the sum SE of the network as compared to equal power allocation.

Accepted to appear in ICC 2018, Kansas City, MO

References in corpus (4)

• Massive MIMO with Non-Ideal Arbitrary Arrays: Hardware Scaling Laws and Circuit-Aware Design
• Optimal Pilot and Payload Power Control in Single-Cell Massive MIMO Systems
• Multi-Cell Multiuser Massive MIMO Networks: User Capacity Analysis and Pilot Design
• User Load Analysis and Pilot Sequence Design for Multi-Cell Massive MIMO Networks

Cited by in corpus (3)

• On the Pilot Contamination Attack in Multi-Cell Multiuser Massive MIMO Networks
• Enhanced Fairness and Scalability of Power Control Schemes in Multi-Cell Massive MIMO
• Max-Min Power Control in Downlink Massive MIMO with Distributed Antenna Arrays