QA-P-MMSE: A scalable and high-performance receiver for cell-free Massive MIMO with Quantized Fronthaul

Spectral Efficiency Analysis of Massive MIMO-OFDM Systems with Double Quantization

Massive multiple-input multiple-output (MIMO) achieves a high spectral efficiency (SE) by employing a large number of receive antennas in the uplink. Employing many receive antennas requires a large number of analog-to-digital converters (ADCs) and a high fronthaul data rate. Low-resolution ADCs can reduce power consum...

Performance Analysis of Repeater-Assisted Massive MIMO Systems With Asynchronous Reception

Repeater-assisted massive MIMO (RA-MIMO) provides a cost-effective solution for distributed macro-diversity without the high-capacity fronthaul of cell-free architectures. However, the distributed deployment of repeaters introduces propagation delay differences and timing misalignments, causing asynchronous reception a...

Scalable Distortion-Aware Clustering for Fronthaul-Limited Cell-Free MIMO Networks

This paper studies distortion-aware clustering for uplink fronthaul-limited cell-free MIMO networks employing maximum ratio combining (MRC). While MRC is appealing for its low-complexity, its performance is limited by interference, fronthaul distortions, and channel imperfections. This motivates clustering strategies t...

Low-Complexity Partially-Ignored BP Detection for Massive MIMO Systems With High-Order Modulation

Low-Complexity Near-Field Channel Estimation and Subcarrier-Cooperative Hybrid Precoding for Wideband XL-MIMO OFDM Systems

A decoupled off-grid channel estimation algorithm based on sequential sparse Bayesian learning (SBL) is proposed and a subcarrier-cooperative hybrid precoding framework for multiuser wideband transmission is developed.

Subspace-Enhanced Data-Aided Iterative Channel Estimation for Cell-Free Massive MIMO Systems

Cell-free massive multiple-input multiple-output (CF m-MIMO) is a pivotal wireless transmission technology for sixthgeneration (6G) communication systems. However, as the density of user equipment (UE) increases, the sharing of limited orthogonal pilot resources among a large number of UEs leads to severe pilot contami...