20 results for “massive MIMO”
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This paper introduces a graph-based framework for fair comparison of cellular, coordinated, and cell-free massive-MIMO systems, and derives compatible spectral efficiency expressions for uplink and do…
This paper analyzes the effects of calibration errors on downlink beamforming in a repeater-assisted massive MIMO system and derives analytical expressions for the downlink spectral efficiency.
This paper proposes a new method, multibit quantized precoding (MQP), for multi-user massive MIMO systems with low-resolution digital-to-analog converters, enforcing the finite-alphabet constraint thr…
This paper investigates the design of dual-function radar-communication systems for massive MIMO systems using 1-bit DACs and ADCs, optimizing the transmit signal matrix for enhanced sensing performan…
Jiawei Zhuang, Hongwei Hou, Yafei Wang, Xinping Yi +3 more
This paper proposes a tensor-structured multi-domain channel extrapolation framework to reduce pilot overhead in upper mid-band massive MIMO systems, using a Tucker-based SFT-domain signal model and a…
Hamid Reza Hashempour, Yanjiao Li, Jie Zhang, Hyundong Shin +1 more
This paper proposes a framework for integrated sensing and communication (ISAC) using mMIMO OFDM and ISAR imaging, developing an adaptive ADMM algorithm for high-resolution image recovery and a joint…
This paper proposes an unmanned aerial vehicle (UAV) communication system assisted by stacked intelligent metasurfaces (SIMs) for energy-efficient hybrid beamforming and maximizes sum-rate for multi-u…
This paper compares the downlink spectral efficiency of multi-user large antenna systems with global and local calibration approaches, and demonstrates that global calibration outperforms local calibr…
Hongru Li, Zeyan Zhuang, Zixin Wang, Hengtao He +3 more
This paper proposes a statistical framework for designing task-aware multiple-input multiple-output (MIMO) precoders in future wireless networks using statistical channel state information and trainin…
A novel beam-domain channel estimation method for mmWave MIMO is proposed using sub-6 GHz beam-domain information for improved accuracy.
Yilong Liu, Xi Yang, Jing Xu, Jun Zhang +1 more
This paper investigates the performance impact of non-square uniform planar arrays (UPAs) on extremely large-scale multiple-input multiple-output (XL-MIMO) systems, deriving effective beamfocusing dis…
Hongpu Zhang, Shu Sun, Ruifeng Gao, Tongjia Zhang +1 more
This paper proposes a model for cross-band CSI reconstruction in multi-band low-altitude wireless systems using radio-frequency metadata and pilot-guided cross-attention.
This paper proposes a semantic-aware multiple access scheme for efficient transmission of high-volume visual data among nearby vehicles in uplink-dominant 6G systems, reducing redundant transmissions…
This paper investigates the fundamental limits and optimal design for Integrated Sensing and Communication (ISAC) systems under noncoherent conditions, deriving a lower bound for noncoherent mutual in…
This paper proposes a scale-free algorithm for zero-forcing beamforming in a swarm array of autonomous relays without requiring prior channel knowledge.
This paper proposes a lightweight, distributed machine learning framework for sub-centimeter indoor localization using D-MIMO in O-RAN architectures, reducing midhaul traffic by 100x while maintaining…