33 citations · 38 across the 11 of their papers we have counts for
7 papers · 1 filter
Perfectly Secure Key Agreement Over a Full Duplex Wireless Channel
Gerhard Wunder, Axel Flinth, Daniel Becker +1
Secret key generation (SKG) between authenticated devices is a pivotal task for secure communications. Diffie-Hellman (DH) is de-facto standard but not post-quantum secure. In this…
Guaranteed blind deconvolution and demixing via hierarchically sparse reconstruction
Axel Flinth, Ingo Roth, Benedikt Groß +2
The blind deconvolution problem amounts to reconstructing both a signal and a filter from the convolution of these two. It constitutes a prominent topic in mathematical and enginee…
Measure Concentration on the OFDM-based Random Access Channel
Gerhard Wunder, Axel Flinth, Benedikt Groß
It is well known that CS can boost massive random access protocols. Usually, the protocols operate in some overloaded regime where the sparsity can be exploited. In this paper, we…
Hierarchical sparse recovery from hierarchically structured measurements with application to massive random access
Benedikt Groß, Axel Flinth, Ingo Roth +2
A new family of operators, coined hierarchical measurement operators, is introduced and discussed within the well-known hierarchical sparse recovery framework. Such operator is a c…
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…