Projects

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Human Posture Detection from Ultra-Wideband (UWB) On-Body Signals

recognition of body postures for fall prevention of elderly care patients

• conducted UWB signal measurements between on-body nodes with Vector Network Analyzer and oscilloscope
• performed statistical analysis of the obtained measurements in Matlab
• employed various machine learning approaches to the posture classification task in Python
• selected a suitable low-complexity, low-cost system architecture
• verified feasibility and functionality in simulation
• supervised student research assistant and related bachelor's group project (thesis)
• publications: [3], [4], [6]

Distance and Displacement Estimation in Multipath UWB Indoor Channels

estimate distance and displacement between wireless nodes without direct interaction between them

• no requirement for line of sight, knowledge about environment or absolute positions
• implemented estimation algorithms in Matlab
• verified novel concept with measurements in indoor scenario
• co-supervised two related semester projects
• publication: [5]

Indoor Localization and Tracking with Bluetooth Low Energy (BLE)

locate and track an agent (smartphone) based on BLE signals to surrounding anchors

• implemented distance estimation based on received signal strength indicator (RSSI) in Matlab
• evaluated different calibration schemes for accurate propagation model
• tested system in various indoor environments
• performed sensor fusion with inertial measurement unit (IMU) data using an Extended Kalman Filter
• publications: [1], [2]
• industry cooperation with Schindler AG

Efficient Decoding Scheme for Location-Based Chipless RFID Transponders

(M.Sc. thesis at the Institute for Microwaves & Photonics, FAU Erlangen-Nuremberg under supervision of Prof. Dr.-Ing. M. Vossiek)
obtain high-resolution images of mmWave QR tags with structured surfaces

• developed setup for Synthetic Aperture Radar (SAR) imaging of structured metallic surface tag
• selected and implemented signal processing algorithms for high-resolution SAR imaging in Matlab
• programmed robot controls for precise data acquisition with commercial 77-GHz FMCW MIMO radar
• conducted measurement campaign with industrial 6-axis robot
• demonstrated successful tag information recovery from surface image

Correction of Rotation in Reconstructed Radar Image

correct an arbitrary rotation of a mm-wave QR tag in a 2D image to facilitate information recovery

• implemented processing of raw radar data in Matlab
• selected image processing algorithms for feature detection
• wrote Matlab scripts for semi-automatic rotation correction of image content

Parameter Analysis For Dielectric Layer Detection with Close-Range Radar

quantify the influence of radar system parameters for eigenvalue-based layer detection

• performed simulative parameter analysis for different reconstruction algorithms in Matlab
• verified and refined suitable parameter sets on radar measurement data (75-110 GHz)
• provided recommendations for application in security scanners based on evaluated data

Development of a 868 MHz RFID Antenna Array

(B.Sc. thesis at the Institute for Microwaves & Photonics, FAU Erlangen-Nuremberg under supervision of Prof. Dr.-Ing. M. Vossiek)
develop and test a phased array of patch antennas for RFID applications

• determined suitable antenna designs for circular polarization
• designed and simulated promising candidates in CST Microwave Studio and Ansys HFSS
• tested manufactured prototypes with a Vector Network Analyzer