318 citations · 1k across the 84 of their papers we have counts for
6 papers · 1 filter
The Hybrid Transmission Grid Architecture: Benefits in Nodal Pricing
Matthias Hotz, Wolfgang Utschick
Recently, we proposed a capacity expansion approach for transmission grids that combines the upgrade of transmission capacity with a transition in system structure to improve grid…
A Bilinear Equalizer for Massive MIMO Systems
David Neumann, Thomas Wiese, Michael Joham +1
We present a novel approach for low-complexity equalizer design well-suited for cellular massive MIMO systems. Our design allows to exploit the channel structure in terms of covari…
Reducing the Need for New Lines in Germany's Energy Transition: The Hybrid Transmission Grid Architecture
Matthias Hotz, Irina Boiarchuk, Dominic Hewes +2
The energy transition will lead to an imbalance in electric power generation and demand along the north-south axis of Germany. To manage this imbalance, the transmission system ope…
Learning the MMSE Channel Estimator
David Neumann, Thomas Wiese, Wolfgang Utschick
We present a method for estimating conditionally Gaussian random vectors with random covariance matrices, which uses techniques from the field of machine learning. Such models are…
Hybrid LISA Precoding for Multiuser Millimeter-Wave Communications
Wolfgang Utschick, Christoph Stöckle, Michael Joham +1
Millimeter-wave (mmWave) communications plays an important role for future cellular networks because of the vast amount of spectrum available in the underutilized mmWave frequency…
Covariance Matrix Estimation in Massive MIMO
David Neumann, Michael Joham, Wolfgang Utschick
Interference during the uplink training phase significantly deteriorates the performance of a massive MIMO system. The impact of the interference can be reduced by exploiting secon…