11 citations · 15 across the 4 of their papers we have counts for
6 papers · 1 filter
Performance of Hierarchical Sparse Detectors for Massive MTC
Gerhard Wunder, Ingo Roth, Rick Fritschek +1
Recently, a new class of so-called \emph{hierarchical thresholding algorithms} was introduced to optimally exploit the sparsity structure in joint user activity and channel detecti…
Low-Overhead Hierarchically-Sparse Channel Estimation for Multiuser Wideband Massive MIMO
Gerhard Wunder, Stelios Stefanatos, Axel Flinth +2
The problem of excessive pilot overhead required for uplink massive MIMO channel estimation is well known, let alone when it is considered along with wideband (OFDM) transmissions.…
Hierarchical Sparse Channel Estimation for Massive MIMO
Gerhard Wunder, Ingo Roth, Axel Flinth +4
The problem of wideband massive MIMO channel estimation is considered. Targeting for low complexity algorithms as well as small training overhead, a compressive sensing (CS) approa…
Recovering quantum gates from few average gate fidelities
Ingo Roth, Richard Kueng, Shelby Kimmel +4
Characterising quantum processes is a key task in and constitutes a challenge for the development of quantum technologies, especially at the noisy intermediate scale of today's dev…
Entanglement-ergodic quantum systems equilibrate exponentially well
Henrik Wilming, Marcel Goihl, Ingo Roth +1
One of the outstanding problems in non-equilibrium physics is to precisely understand when and how physically relevant observables in many-body systems equilibrate under unitary ti…
Hierarchical restricted isometry property for Kronecker product measurements
I. Roth, A. Flinth, R. Kueng +2
Hierarchically sparse signals and Kronecker product structured measurements arise naturally in a variety of applications. The simplest example of a hierarchical sparsity structure…