Search Results for author: Alexios Balatsoukas-Stimming

Found 13 papers, 5 papers with code

Band-of-Interest-based Channel Impulse Response Fusion for Breathing Rate Estimation with UWB

no code implementations6 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.

On the Implementation Complexity of Digital Full-Duplex Self-Interference Cancellation

no code implementations9 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.

A Maximum-Likelihood-based Multi-User LoRa Receiver Implemented in GNU Radio

no code implementations15 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.

Non-Linear Self-Interference Cancellation via Tensor Completion

1 code implementation5 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.

On the Advantage of Coherent LoRa Detection in the Presence of Interference

no code implementations1 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.

Lupulus: A Flexible Hardware Accelerator for Neural Networks

no code implementations3 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.

Scheduling

An Open-Source LoRa Physical Layer Prototype on GNU Radio

1 code implementation19 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

Identification of Non-Linear RF Systems Using Backpropagation

1 code implementation27 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.

Hardware Implementation of Neural Self-Interference Cancellation

no code implementations13 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.

Advanced Machine Learning Techniques for Self-Interference Cancellation in Full-Duplex Radios

no code implementations14 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.

BIG-bench Machine Learning

A Lyra2 FPGA Core for Lyra2REv2-Based Cryptocurrencies

1 code implementation16 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

Non-Linear Digital Self-Interference Cancellation for In-Band Full-Duplex Radios Using Neural Networks

1 code implementation1 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.

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