11 papers · 1 filter
Performance Analysis of Cell-Free Massive MIMO under Imperfect LoS Phase Tracking
Noor Ul Ain, Lorenzo Miretti, Renato L. G. Cavalcante +1
We study the impact of imperfect line-of-sight (LoS) phase tracking on the uplink performance of cell-free massive MIMO networks. Unlike prior works that assume perfectly known or…
A joint channel estimation and beamforming separation principle for massive MIMO systems
Lorenzo Miretti, Slawomir Stańczak, Giuseppe Caire
We demonstrate that separating beamforming (i.e., downlink precoding and uplink combining) and channel estimation in multi-user MIMO wireless systems incurs no loss of optimality u…
A Comparison among Single Carrier, OFDM, and OTFS in mmWave Multi-Connectivity Downlink Transmissions
Fabian Göttsch, Shuangyang Li, Lorenzo Miretti +2
In this paper, we perform a comparative study of common wireless communication waveforms, namely the single carrier (SC), orthogonal frequency-division multiplexing (OFDM), and ort…
On the Optimal Performance of Distributed Cell-Free Massive MIMO with LoS Propagation
Noor Ul Ain, Lorenzo Miretti, Sławomir Stańczak
In this study, we revisit the performance analysis of distributed beamforming architectures in dense user-centric cell-free massive multiple-input multiple-output (mMIMO) systems i…
Two-timescale weighted sum-rate maximization for large cellular and cell-free massive MIMO
Lorenzo Miretti, Emil Björnson, Sławomir Stańczak
We reconsider the problem of joint power control and beamforming design to maximize the weighted sum rate in large and potentially cell-free massive MIMO networks. In contrast to t…
Unlocking the Potential of Local CSI in Cell-Free Networks with Channel Aging and Fronthaul Delays
Lorenzo Miretti, Sławomir Stańczak
It is generally believed that downlink cell-free networks perform best under centralized implementations where the local channel state information (CSI) acquired by the access-poin…