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Patrick Fenske - IEEE Xplore Author Profile

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The integration of radar sensing and imaging capabilities into future integrated sensing and communication (ISAC) networks enables advanced use cases, including autonomous vehicle navigation, real-time health monitoring, and smart city management. However, ultraprecise time and frequency synchronization is crucial for unlocking the full potential of such networked ISAC systems. In this article, a ...Show More
In coherent continuous-wave (CW) radar systems, such as frequency-modulated CW (FMCW) radar systems, phase noise significantly limits both the maximum detectable measurement range and the measurement precision for targets at long range. Approaches that minimize the amount of phase noise during signal generation have so far only led to a marginal improvement of radar systems, and are therefore unsu...Show More
Climate change is associated with a variety of environmental phenomena, such as the melting of glaciers, the drying out of crops and soils, and an increase in the risk of avalanches. To detect and monitor these changes, satellite-based radar imaging is widely used, as it enables the large-scale mapping of the Earth's surface independent of weather and sunlight. An emerging field of research is to ...Show More
This paper presents an approach for the use of cooperative FMCW radar units for precise vehicle-to-infrastructure localization, orientation determination, and simultaneous estimation of synchronization errors between the involved wireless nodes. Our concept requires only one stationary SIMO radar node, which is integrated into the infrastructure and a conventional automotive radar mounted on the v...Show More
Cooperative radar networks are a promising technology in various areas, such as vehicle-to-infrastructure networks for automotive radar and radar remote sensing with UAVs. The use of widely distributed radar networks enables the detection of targets with complex scattering characteristics, as their coherent bistatic images are superior for forward scattering, and each monostatic image illuminates ...Show More
In this paper, we present a fully field-programmable gate array (FPGA)-based real-time implementation of a wireless time and frequency synchronization scheme for communication and sensor networks. For this purpose, a communication link using frequency division multiplexing is established between three distributed stations. This allows the simultaneous and continuous transmission of quadrature phas...Show More
This work introduces a compact planar implementation of a self-interference cancellation coupler (SICC), which is designed for 24 GHz continuous wave (CW) radar frontends. The SICC utilizes a part of the TX signal which is modulated in amplitude and phase to generate a cancellation signal, which suppresses the most severe TX-RX-leakage components. Instead of using a closed control loop to minimize...Show More
Monostatic radar systems as well as radars with separated but nearby-placed transmit and receive antennas are beneficial in terms of cost-efficiency and miniaturization, which is necessary for their integration into compact radar systems or mobile devices [1], [2] as well as for radar networks that demand reciprocal transmission channels between the nodes [3]. However, this lack of separation betw...Show More
The field of multicopter unmanned aerial vehicles (UAVs) has seen massive technological advances and decreasing costs over the last decade. Due to the higher prevalence and availability of these multicopter UAVs, there have also been rapid improvements in the software interfaceability, enabling the easy integration of custom software for flight planning and controllers. This opened up completely n...Show More
In radar and communication systems, phase noise is one of the main causes of performance degradation. Phase noise increases the uncertainty in radar measurements and limits the achievable data rates in communication systems. When radio frequency (RF) signals distorted by bandlimited phase noise are modeled, the phase noise power spectral density (PSD) is usually approximated by a scalar root-mean-...Show More
The availability of three-dimensional (3D) product maps is among the most important factors for smart warehouse environments connected to the Internet of Things. Therefore, online access to the data is a key feature that can only be provided by real-time localization systems. With the well-known synthetic aperture radar technique in combination with ultrahigh frequency (UHF) radio-frequency identi...Show More