no code implementations • 6 Feb 2023 • Sitian Li, Alexios Balatsoukas-Stimming, Andreas Burg
We focus on such scenarios and propose a CIR delay bin fusion method to merge several CIR bins to achieve a more accurate and reliable breathing rate estimate.
no code implementations • 8 Nov 2022 • Sitian Li, Alexios Balatsoukas-Stimming, Andreas Burg
Ultra-wideband (UWB) devices are widely used in indoor localization scenarios.
no code implementations • 9 Jan 2021 • Andreas Toftegaard Kristensen, Alexios Balatsoukas-Stimming, Andreas Burg
In-band full-duplex systems promise to further increase the throughput of wireless systems, by simultaneously transmitting and receiving on the same frequency band.
no code implementations • 15 Dec 2020 • Mathieu Xhonneux, Joachim Tapparel, Orion Afisiadis, Alexios Balatsoukas-Stimming, Andreas Burg
LoRa is a popular low-power wide-area network (LPWAN) technology that uses spread-spectrum to achieve long-range connectivity and resilience to noise and interference.
1 code implementation • 5 Oct 2020 • Freek Jochems, Alexios Balatsoukas-Stimming
Non-linear self-interference (SI) cancellation constitutes a fundamental problem in full-duplex communications, which is typically tackled using either polynomial models or neural networks.
no code implementations • 1 Oct 2020 • Orion Afisiadis, Sitian Li, Andreas Burg, Alexios Balatsoukas-Stimming
We also compare the performance of LoRa with coherent and non-coherent receivers and we show that the coherent detection of LoRa is significantly more beneficial in interference scenarios than in the presence of only AWGN.
no code implementations • 3 May 2020 • Andreas Toftegaard Kristensen, Robert Giterman, Alexios Balatsoukas-Stimming, Andreas Burg
Neural networks have become indispensable for a wide range of applications, but they suffer from high computational- and memory-requirements, requiring optimizations from the algorithmic description of the network to the hardware implementation.
1 code implementation • 19 Feb 2020 • Joachim Tapparel, Orion Afisiadis, Paul Mayoraz, Alexios Balatsoukas-Stimming, Andreas Burg
LoRa is the proprietary physical layer (PHY) of LoRaWAN, which is a popular Internet-of-Things (IoT) protocol enabling low-power devices to communicate over long ranges.
Signal Processing
1 code implementation • 27 Jan 2020 • Andreas Toftegaard Kristensen, Andreas Burg, Alexios Balatsoukas-Stimming
In this work, we use deep unfolding to view cascaded non-linear RF systems as model-based neural networks.
no code implementations • 13 Jan 2020 • Yann Kurzo, Andreas Toftegaard Kristensen, Andreas Burg, Alexios Balatsoukas-Stimming
In-band full-duplex systems can transmit and receive information simultaneously on the same frequency band.
no code implementations • 14 Dec 2019 • Andreas Toftegaard Kristensen, Andreas Burg, Alexios Balatsoukas-Stimming
For example, at a digital self-interference cancellation of 44. 51 dB, a complex-valued neural network requires 33. 7 % fewer floating-point operations and 26. 9 % fewer parameters compared to the polynomial model.
1 code implementation • 16 Jul 2018 • Michiel Van Beirendonck, Louis-Charles Trudeau, Pascal Giard, Alexios Balatsoukas-Stimming
Lyra2REv2 is a hashing algorithm that consists of a chain of individual hashing algorithms and it is used as a proof-of-work function in several cryptocurrencies that aim to be ASIC-resistant.
Cryptography and Security Hardware Architecture Signal Processing
1 code implementation • 1 Nov 2017 • Alexios Balatsoukas-Stimming
Full-duplex systems require very strong self-interference cancellation in order to operate correctly and a significant part of the self-interference signal is due to non-linear effects created by various transceiver impairments.