10 papers · 1 filter
Beam-Coherence-Aware Two-Stage Digital Combining for mmWave MU-MIMO Systems
Yasaman Khorsandmanesh, Emil Bjornson, Joakim Jalden +1
This paper considers a wideband millimeter-wave MIMO system with fully digital transceivers at both the base station and the user equipment (UE), focusing on mobile scenarios. To r…
Quantized Precoding for Maximizing Sum Rate in MU-MIMO Systems with Constrained Fronthaul
Yasaman Khorsandmanesh, Alva Kosasih, Emil Björnson +1
This paper studies a downlink multi-user multiple-input multiple-output (MU-MIMO) system, where the precoding matrix is computed at a baseband unit (BBU) and then transmitted to th…
Splitting Precoding with Subspace Selection and Quantized Refinement for Massive MIMO
Yasaman Khorsandmanesh, Emil Bjornson, Joakim Jalden
Limited fronthaul capacity is a practical bottleneck in massive multiple-input multiple-output (MIMO) 5G architectures, where a base station (BS) consists of an advanced antenna sy…
Channel-Coherence-Adaptive Two-Stage Fully Digital Combining for mmWave MIMO Systems
Yasaman Khorsandmanesh, Emil Björnson, Joakim Jaldén +1
This paper considers a millimeter-wave wideband point-to-point MIMO system with fully digital transceivers at the base station and the user equipment (UE), focusing on mobile UE sc…
Fronthaul Quantization-Aware MU-MIMO Precoding for Sum Rate Maximization
Yasaman Khorsandmanesh, Emil Björnson, Joakim Jaldén
This paper considers a multi-user multiple-input multiple-output (MU-MIMO) system where the precoding matrix is selected in a baseband unit (BBU) and then sent over a digital front…
MSE Minimization in RIS-Aided MU-MIMO with Discrete Phase Shifts and Fronthaul Quantization
Parisa Ramezani, Yasaman Khorsandmanesh, Emil Björnson
In this paper, we consider a downlink multi-user multiple-input multiple-output (MU-MIMO) communication assisted by a reconfigurable intelligent surface (RIS) and study the precodi…
Joint Discrete Precoding and RIS Optimization for RIS-Assisted MU-MIMO Communication Systems
Parisa Ramezani, Yasaman Khorsandmanesh, Emil Björnson
This paper considers a multi-user multiple-input multiple-output (MU-MIMO) system where the downlink communication between a base station (BS) and multiple user equipments (UEs) is…
A Novel Discrete Phase Shift Design for RIS-Assisted Multi-User MIMO
Parisa Ramezani, Yasaman Khorsandmanesh, Emil Björnson
Reconfigurable intelligent surface (RIS) is a newly-emerged technology that might fundamentally change how wireless networks are operated. Though extensively studied in recent year…
Optimized Precoding for MU-MIMO With Fronthaul Quantization
Yasaman Khorsandmanesh, Emil Björnson, Joakim Jaldén
One of the first widespread uses of multi-user multiple-input multiple-output (MU-MIMO) is in 5G networks, where each base station has an advanced antenna system (AAS) that is conn…
Quantisation-aware Precoding for MU-MIMO with Limited-capacity Fronthaul
Yasaman Khorsandmanesh, Emil Björnson, Joakim Jaldèn
Base stations in 5G and beyond use advanced antenna systems (AASs), where multiple passive antenna elements and radio units are integrated into a single box. A critical bottleneck…