522 citations · 1.2k across the 34 of their papers we have counts for
7 papers · 1 filter
Beamspace MIMO for Satellite Swarms
Maik Röper, Bho Matthiesen, Dirk Wübben +2
Systems of small distributed satellites in low Earth orbit (LEO) transmitting cooperatively to a multiple antenna ground station (GS) are investigated. These satellite swarms have…
On-Board Federated Learning for Dense LEO Constellations
Nasrin Razmi, Bho Matthiesen, Armin Dekorsy +1
Mega-constellations of small-size Low Earth Orbit (LEO) satellites are currently planned and deployed by various private and public entities. While global connectivity is the main…
Ground-Assisted Federated Learning in LEO Satellite Constellations
Nasrin Razmi, Bho Matthiesen, Armin Dekorsy +1
In Low Earth Orbit (LEO) mega constellations, there are relevant use cases, such as inference based on satellite imaging, in which a large number of satellites collaboratively trai…
Inter-Plane Inter-Satellite Connectivity in LEO Constellations: Beam Switching vs. Beam Steering
Israel Leyva-Mayorga, Maik Röper, Bho Matthiesen +3
Low Earth orbit (LEO) satellite constellations rely on inter-satellite links (ISLs) to provide global connectivity. However, one significant challenge is to establish and maintain…
Hierarchical Resource Allocation: Balancing Throughput and Energy Efficiency in Wireless Systems
Bho Matthiesen, Eduard A. Jorswieck, Petar Popovski
A main challenge of 5G and beyond wireless systems is to efficiently utilize the available spectrum and simultaneously reduce the energy consumption. From the radio resource alloca…
Globally Optimal Beamforming for Rate Splitting Multiple Access
Bho Matthiesen, Yijie Mao, Petar Popovski +1
We consider globally optimal precoder design for rate splitting multiple access in Gaussian multiple-input single-output downlink channels with respect to weighted sum rate and ene…
Reconfigurable Intelligent Surfaces: A Signal Processing Perspective With Wireless Applications
Emil Björnson, Henk Wymeersch, Bho Matthiesen +3
Antenna array technology enables directional transmission and reception of wireless signals, for communications, localization, and sensing purposes. The signal processing algorithm…