103 citations · 305 across the 16 of their papers we have counts for
18 papers
Design Space Exploration of In-Memory Computing Implementations for Discrete Fourier Transform
Sofia Tatidis, Philip Nielsen, Liang Liu +1
Although memristor-based in-memory computing (IMC) has been widely investigated for brain-inspired neuromorphic workloads, systematic evaluations of its energy, latency, and signal…
LuMaMi28: Real-Time Millimeter-Wave Massive MIMO Systems with Antenna Selection
MinKeun Chung, Liang Liu, Andreas Johansson +11
This paper presents LuMaMi28, a real-time 28 GHz massive multiple-input multiple-output (MIMO) testbed. In this testbed, the base station has 16 transceiver chains with a fully-dig…
Millimeter-Wave Massive MIMO Testbed with Hybrid Beamforming
MinKeun Chung, Liang Liu, Andreas Johansson +5
Massive multiple-input multiple-out (MIMO) technology is vital in millimeter-wave (mmWave) bands to obtain large array gains. However, there are practical challenges, such as high…
Phase-Noise Compensation for OFDM Systems Exploiting Coherence Bandwidth: Modeling, Algorithms, and Analysis
MinKeun Chung, Liang Liu, Ove Edfors
Phase-noise (PN) estimation and compensation are crucial in millimeter-wave (mmWave) communication systems to achieve high reliability. The PN estimation, however, suffers from hig…
The Effect of Coupling Memory and Block Length on Spatially Coupled Serially Concatenated Codes
Mojtaba Mahdavi, Muhammad Umar Farooq, Liang Liu +3
Spatially coupled serially concatenated codes (SC-SCCs) are a class of spatially coupled turbo-like codes, which have a close-to-capacity performance and low error floor. In this p…
Processing Distribution and Architecture Tradeoff for Large Intelligent Surface Implementation
Jesus Rodriguez Sanchez, Ove Edfors, Fredrik Rusek +1
The Large Intelligent Surface (LIS) concept has emerged recently as a new paradigm for wireless communication, remote sensing and positioning. It consists of a continuous radiating…
An Iterative Interference Cancellation Algorithm for Large Intelligent Surfaces
Jesus Rodriguez Sanchez, Fredrik Rusek, Ove Edfors +1
The Large Intelligent Surface (LIS) concept is a promising technology aiming to revolutionize wireless communication by exploiting spatial multiplexing at its fullest. Despite of i…
Low Power Receiver Front Ends: Scaling Laws and Applications
Muris Sarajlić, Liang Liu, Henrik Sjöland +1
In this paper, we combine communication-theoretic laws with known, practically verified results from circuit theory. As a result, we obtain closed-form theoretical expressions link…
Decentralized Massive MIMO Processing Exploring Daisy-chain Architecture and Recursive Algorithms
Jesus Rodriguez Sanchez, Fredrik Rusek, Ove Edfors +2
Algorithms for Massive MIMO uplink detection and downlink precoding typically rely on a centralized approach, by which baseband data from all antenna modules are routed to a centra…
Fully Decentralized Massive MIMO Detection Based on Recursive Methods
Jesus Rodriguez Sanchez, Fredrik Rusek, Muris Sarajlic +2
Algorithms for Massive MIMO uplink detection typically rely on a centralized approach, by which baseband data from all antennas modules are routed to a central node in order to be…
Impact of Relay Cooperation on the Performance of Large-scale Multipair Two-way Relay Networks
Muris Sarajlic, Liang Liu, Fredrik Rusek +2
We consider a multipair two-way relay communication network, where pairs of user devices exchange information via a relay system. The communication between users employs time divis…
Efficient DSP and Circuit Architectures for Massive MIMO: State-of-the-Art and Future Directions
Liesbet Van der Perre, Liang Liu, Erik G. Larsson
Massive MIMO is a compelling wireless access concept that relies on the use of an excess number of base-station antennas, relative to the number of active terminals. This technolog…
Achievable Rates and Training Overheads for a Measured LOS Massive MIMO Channel
Paul Harris, Wael Boukley Hasan, Liang Liu +5
This paper presents achievable uplink (UL) sumrate predictions for a measured line-of-sight (LOS) massive multiple-input, multiple-output (MIMO) (MMIMO) scenario and illustrates th…
Temporal Analysis of Measured LOS Massive MIMO Channels with Mobility
Paul Harris, Steffen Malkowsky, Joao Vieira +6
The first measured results for massive multiple-input, multiple-output (MIMO) performance in a line-of-sight (LOS) scenario with moderate mobility are presented, with 8 users serve…
Performance Characterization of a Real-Time Massive MIMO System with LOS Mobile Channels
Paul Harris, Steffen Malkowsky, Joao Vieira +5
The first measured results for massive MIMO performance in a line-of-sight (LOS) scenario with moderate mobility are presented, with 8 users served in real-time using a 100-antenna…
The World's First Real-Time Testbed for Massive MIMO: Design, Implementation, and Validation
Steffen Malkowsky, Joao Vieira, Liang Liu +7
This paper sets up a framework for designing a massive multiple-input multiple-output (MIMO) testbed by investigating hardware (HW) and system-level requirements such as processing…
An Energy Efficiency Perspective on Massive MIMO Quantization
Muris Sarajlić, Liang Liu, Ove Edfors
One of the basic aspects of Massive MIMO (MaMi) that is in the focus of current investigations is its potential of using low-cost and energy-efficient hardware. It is often claimed…
Reciprocity Calibration for Massive MIMO: Proposal, Modeling and Validation
Joao Vieira, Fredrik Rusek, Ove Edfors +3
This paper presents a mutual coupling based calibration method for time-division-duplex massive MIMO systems, which enables downlink precoding based on uplink channel estimates. Th…