16 papers
A Frequency-Domain Artificial Reverberator Plug-In
Jonas Roth, Nishanth Kumar, Silvan Krebs +2
We present FDverb, a frequency-domain artificial reverberator, based on the idea of a vocoder with a noise carrier signal. Using a short-time Fourier transform (STFT) for analysis…
Alias-Free Oscillator Synchronization via Additive Synthesis
Jonas Roth, Domenic Keller, Oscar Castañeda +1
Oscillator synchronization is a widely used sound-synthesis technique, but straightforward digital implementations suffer from aliasing artifacts. This paper presents an alias-free…
PolyMap: A 64-Channel Polyphonic Guitar Pickup System
David Wieland, Jonas Roth, Christoph Studer
In electric guitars, the vibrations of the strings are typically sensed by coils of wire combined with a magnet, called pickups. The pickups and their position along the strings co…
A 0.32 mm 100 Mb/s 223 mW ASIC in 22FDX for Joint Jammer Mitigation, Channel Estimation, and SIMO Data Detection
Jonas Elmiger, Fabian Stuber, Oscar Castañeda +2
We present the first single-input multiple-output (SIMO) receiver ASIC that jointly performs jammer mitigation, channel estimation, and data detection. The ASIC implements a recent…
A Jammer-Resilient 2.87 mm 1.28 MS/s 310 mW Multi-Antenna Synchronization ASIC in 65 nm
Flurin Arquint, Oscar Castañeda, Gian Marti +1
We present the first ASIC implementation of jammer-resilient multi-antenna time synchronization. The ASIC implements a recent algorithm that mitigates jamming attacks on synchroniz…
GNSS Jammer and Spoofer Mitigation via Multi-Antenna Processing
Jonas Elmiger, Gian Marti, Christoph Studer
Modern positioning relies on radio signals from global navigation satellite systems (GNSS). Their low receive power renders these radio signals susceptible to jamming attacks, in w…
Universal MIMO Jammer Mitigation
Gian Marti, Christoph Studer
Multi-antenna processing enables jammer mitigation through spatial filtering, provided that the receiver knows the spatial signature of the jammer interference. Estimating this sig…
PyJama: Differentiable Jamming and Anti-Jamming with NVIDIA Sionna
Fabian Ulbricht, Gian Marti, Reinhard Wiesmayr +1
Despite extensive research on jamming attacks on wireless communication systems, the potential of machine learning for amplifying the threat of such attacks, or our ability to miti…
A Jammer-Mitigating 267 Mb/s 3.78 mm 583 mW 328 Multi-User MIMO Receiver in 22FDX
Florian Bucheli, Oscar Castañeda, Gian Marti +1
We present the first multi-user (MU) multiple-input multiple-output (MIMO) receiver ASIC that mitigates jamming attacks. The ASIC implements a recent nonlinear algorithm that perfo…
Fundamental Limits for Jammer-Resilient Communication in Finite-Resolution MIMO
Gian Marti, Alexander Stutz-Tirri, Christoph Studer
Spatial filtering based on multiple-input multiple-output (MIMO) processing is a powerful method for jammer mitigation. In principle, a MIMO receiver can null the interference of a…
Jammer-Resilient Time Synchronization in the MIMO Uplink
Gian Marti, Flurin Arquint, Christoph Studer
Spatial filtering based on multiple-input multiple-output (MIMO) processing is a promising approach to jammer mitigation. Effective MIMO data detectors that mitigate smart jammers…
LoFi User Scheduling for Multiuser MIMO Wireless Systems
Alexandra Gallyas-Sanhueza, Gian Marti, Victoria Palhares +2
We propose new low-fidelity (LoFi) user equipment (UE) scheduling algorithms for multiuser multiple-input multiple-output (MIMO) wireless communication systems. The proposed method…
Active Eavesdropper Mitigation via Orthogonal Channel Estimation
Gian Marti, Christoph Studer
Beamforming is a powerful tool for physical layer security, as it can be used for steering signals towards legitimate receivers and away from eavesdroppers. An active eavesdropper,…
An Aliasing-Free Hybrid Digital-Analog Polyphonic Synthesizer
Jonas Roth, Domenic Keller, Oscar Castañeda +1
Analog subtractive synthesizers are generally considered to provide superior sound quality compared to digital emulations. However, analog circuitry requires calibration and suffer…
High Dynamic Range mmWave Massive MU-MIMO with Householder Reflections
Victoria Palhares, Gian Marti, Oscar Castañeda +1
All-digital massive multiuser (MU) multiple-input multiple-output (MIMO) at millimeter-wave (mmWave) frequencies is a promising technology for next-generation wireless systems. Low…
The Impact of SAR-ADC Mismatch on Quantized Massive MU-MIMO Systems
Jérémy Guichemerre, Christoph Studer
Low-resolution analog-to-digital converters (ADCs) in massive multi-user (MU) multiple-input multiple-output (MIMO) wireless systems can significantly reduce the power, cost, and i…