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- Thinfilm (Sweden)SE25 papers
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6 papers · 2 filters
Cell-Free Massive MIMO with Channel Aging and Pilot Contamination
Jiakang Zheng, Jiayi Zhang, Emil Björnson +1
In this paper, we investigate the impact of channel aging on the performance of cell-free (CF) massive multiple-input multiple-output (MIMO) systems with pilot contamination. To ta…
Large-Scale Fading Precoding for Spatially Correlated Rician Fading with Phase Shifts
Özlem Tuğfe Demir, Emil Björnson
We consider large-scale fading precoding (LSFP), which is a two-layer precoding scheme in the downlink of multi-cell massive MIMO (multiple-input multiple-output) systems to suppre…
Optimizing Information Freshness in Two-Way Relay Networks
Bohai Li, He Chen, Nikolaos Pappas +1
In this paper, we investigate an amplify-and-forward (AF) based two-way cooperative status update system, where two sources aim to exchange status updates with each other as timely…
Intelligent Reflecting Surface Operation under Predictable Receiver Mobility: A Continuous Time Propagation Model
Bho Matthiesen, Emil Björnson, Elisabeth De Carvalho +1
The operation of an intelligent reflecting surface (IRS) under predictable receiver mobility is investigated. We develop a continuous time system model for multipath channels and d…
Performance Analysis of Quantized Uplink Massive MIMO-OFDM With Oversampling Under Adjacent Channel Interference
Ali Bulut Üçüncü, Emil Björnson, Håkan Johansson +2
Massive multiple-input multiple-output (MIMO) systems have attracted much attention lately due to the many advantages they provide over single-antenna systems. Owing to the many an…
Wireless Powered Protocol Exploiting Energy Harvesting During Cognitive Communications
Anirudh Agarwal, Deepak Mishra
In this letter, a novel wireless powered protocol is proposed to maximize the system throughput of an energy harvesting (EH) based cognitive radio network, while satisfying a minim…