Location-Aware Pilot Allocation in Multi-Cell Multi-User Massive MIMO Networks

by   Noman Akbar, et al.
Macquarie University
Australian National University

We propose a location-aware pilot allocation algorithm for a massive multiple-input multiple-output (MIMO) network with high-mobility users, where the wireless channels are subject to Rician fading. Pilot allocation in massive MIMO is a hard combinatorial problem and depends on the locations of users. As such, it is highly complex to achieve the optimal pilot allocation in real-time for a network with high-mobility users. Against this background, we propose a low-complexity pilot allocation algorithm, which exploits the behavior of line-of-sight (LOS) interference among the users and allocate the same pilot sequence to the users with small LOS interference. Our examination demonstrates that our proposed algorithm significantly outperforms the existing algorithms, even with localization errors. Specifically, for the system considered in this work, our proposed algorithm provides up to 37.26 efficiency (SE) and improves the sum SE of the worst interference-affected users by up to 2.57 bits/sec/Hz, as compared to the existing algorithms.


Cell-Free Massive MIMO with Channel Aging and Pilot Contamination

In this paper, we investigate the impact of channel aging on the perform...

On the Pilot Contamination Attack in Multi-Cell Multiuser Massive MIMO Networks

In this paper, we analyze pilot contamination (PC) attacks on a multi-ce...

Can Dynamic TDD Enabled Half-Duplex Cell-Free Massive MIMO Outperform Full-Duplex Cellular Massive MIMO?

We consider a dynamic time division duplex (DTDD) enabled cell-free mass...

Improving Fairness for Cell-Free Massive MIMO Through Interference-Aware Massive Access

Cell-free massive multiple-input multiple-output (CF mMIMO) provides goo...

Effective Overloaded Pilot Assignment with Pilot Decontamination for Cell-Free Systems

The pilot contamination in cell-free massive multiple-input-multiple-out...

Pilot Decontamination for Massive MIMO Network with UAVs

This letter studies the pilot contamination (PC) problem for massive mul...

Pilot Assignment Schemes for Cell-Free Massive MIMO Systems

In this work, we propose three pilot assignment schemes to reduce the ef...

Please sign up or login with your details

Forgot password? Click here to reset