DOI: 10.5281/zenodo.7573164
title: Radar Signature Dataset

description: API Tool <strong>| </strong>Project <strong>Abstract</strong><br> The dataset contains multiple sequences of aluminum foil balloon recorded by a <em>77</em>GHz FMCW radar in inverse synthetic aperture (ISAR) setting.<br> <br> <strong>Measurement setting</strong><br> We recorded a dataset in a well-defined setting, which can be used for training ML algorithms.<br> For that purpose, we used a dedicated <em>77</em>-GHz frequency modulated continuous wave (FMCW) radar with <em>2</em>GHz bandwidth and <em>4</em> antennas forming a uniform linear array with half wavelength spacing between them.<br> We recorded <em>50</em> snapshots per second, where each snapshot contains one channel impulse response (CIR) per antenna with <em>1024</em> taps. The radar beam is focused by a meta-material lens, leading to four received beams covering an angle of <em>10</em>° in azimuth direction <em>[1]</em>.<br> Our targets are a set of foil balloons in shapes of digits from <em>0</em> to <em>9</em>. Each balloon is approximately <em>15</em>cm in height and its width and depth are varied from <em>8</em>cm<em> </em>to <em>10</em>cm and <em>3</em>cm to <em>5</em>cm respectively depending on the digit.<br> All measurement data are collected in an inverse synthetic aperture radar (ISAR) setting in a closed room environment.<br> The position and orientation of the radar are fixed through all the measurements. The digit shaped targets are placed at an initial position at the center of the radar beam at <em>3</em>m distance and facing towards the radar. <br> In each measurement, the target is continuously rotated around its center with respect to the <em>x</em>-, <em>y</em>-, and <em>z</em>-axis, where the <em>x</em>-axis is initially pointing towards the radar and the <em>z</em>-axis is pointing towards the room ceiling.<br> The maximum rotation angle for all axes is in the range from <em>−45</em>° to <em>+45</em>° with respect to its initial orientation.<br> While the target is rotated, its distance towards the radar is also changed along the <em>x</em>-axis, in the range from <em>−0.5</em>m to <em>+0.5</em>m, relative to its initial position, but kept at the same position in the <em>yz</em>-plane.<br> <br> <strong>Usage</strong><br> The sequences are represented in NumPy arrays, stored in Pickle files that are compressed in a single Zip archive.<br> The corresponding meta information are stored in a Pandas Dataframe in the `dataset_meta.pkl` Pickle file.<br> The files can be used to filter the sequences for certain properties like label or recording environment.<br> <br> For convenience, we provide an API to download and work with the dataset. The API is available at the following link: API tool<br> <br> <strong>Author affiliations</strong> <strong>Symbol </strong> <strong>Affiliation</strong> * Silicon Austria Labs<br> JKU LIT SAL eSPML Lab ^ Johannes Kepler University Linz, Austria<br> Institute for Communications Engineering and RF-Systems<br> JKU LIT SAL eSPML Lab <br> <strong>References</strong> <em>[1]</em> C. Kohlberger, R. Hüttner, and A. Stelzer, “<em>Metamaterial lens for monopulse beamforming with a $77$-ghz long-range radar,</em>” in 2021 51st European Microwave Conference (EuMC), pp. 253–256, 2022