Andreas Toftegaard Kristensen

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In-band full-duplex systems allow for more efficient use of temporal and spectral resources by transmitting and receiving information at the same time and on the same frequency. However, this creates a strong self-interference signal at the receiver, makin ...

Wireless sensing offers an alternative to wearables for contactless monitoring of human activity and vital signs. However, most existing systems use bistatic setups, which suffer from phase imperfections due to unsynchronized clocks. Monostatic systems ove ...

Continuous monitoring of human activity and vital signs has become increasingly important in healthcare and consumer applications. While wearables and others sensors are already in widespread use, they often suffer from issues such as discomfort and the ne ...

In this paper, we explore the use of channel state information (CSI) from a WiFi system to estimate the breathing rate of a person in a room. In order to extract WiFi CSI components that are sensitive to breathing, we propose to consider the delay domain c ...

We present an error correction code (ECC) decoder based on the Guessing Random Additive Noise Decoding (GRAND) with ABandonment (GRANDAB) algorithm for applications that require constant throughput and fixed decoding latency in the Gbps range. This high co ...

In this work, we use deep unfolding to view cascaded non-linear RF systems as model-based neural networks. This view enables the direct use of a wide range of neural network tools and optimizers to efficiently identify such cascaded models. We demonstrate ...

In-band full-duplex systems can transmit and receive information simultaneously and on the same frequency band. However, due to the strong self-interference caused by the transmitter to its own receiver, the use of non-linear digital self-interference canc ...

Due to its high parallelism, belief propagation (BP)decoding is amenable to high-throughput applications and thusrepresents a promising solution for the ultra-high peak datarate required by future communication systems. To bridge theperformance gap compare ...

In-band full-duplex systems promise to further increase the throughput of wireless systems, by simultaneously transmitting and receiving on the same frequency band. However, concurrent transmission generates a strong self-interference signal at the receive ...

Due to the low-latency and high-reliability require-ments of 5G, low-complexity node-based successive cancellation list (SCL) decoding has received considerable attention for use in 5G communications systems. By identifying special constituent codes in the ...

Turbo codes have been successfully adopted in 4G LTE, which can approach the channel capacity with Bahl-Cocke-Jelinek-Raviv (BCJR) decoding. With the evolution from 4G LTE to 5G NR, there is a demand to design a unified channel decoder that supports both L ...

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. Moreover, ...

Compared with the bit-wise successive cancellation list (SCL) decoding of polar codes, the node-based Fast SCL decoding significantly reduces the decoding latency by identifying special constituent codes and decoding these in parallel. To further reduce th ...

Andreas Toftegaard Kristensen

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

An SDR-Based Monostatic Wi-Fi System with Analog Self-Interference Cancellation for Sensing

Monostatic Multi-Target Wi-Fi-Based Breathing Rate Sensing Using Openwifi

ComplexBeat: Breathing Rate Estimation from Complex CSI

A GRANDAB Decoder with 8.48 Gbps Worst-Case Throughput in 65nm CMOS

Identification of Non-Linear RF Systems Using Backpropagation

Hardware Implementation of Neural Self-Interference Cancellation

High-Throughput and Flexible Belief Propagation List Decoder for Polar Codes

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

A Sequence Repetition Node-Based Successive Cancellation List Decoder for 5G Polar Codes: Algorithm and Implementation

Improved Belief Propagation Decoding of Turbo Codes

Lupulus: A Flexible Hardware Accelerator For Neural Networks

Fast Sequence Repetition Node-Based Successive Cancellation List Decoding for Polar Codes