Detection of multi‐people micro‐motions based on range–velocity–time points
Hao Du, Tian Jin, Meng Li, Yongping Song, Yongpeng Dai · Electronics Letters · 2019
The micro‐Doppler effect is a useful signature for classifying various human behaviours. However, most micro‐Doppler researches assume that only a single moving target exists during the observation. Their works lack in separating micro‐motion features from multi‐movers. When more than one target is present, their performance will deteriorate heavily. To address this issue, the authors design a new 3D (three‐dimensional) model, range–velocity–time points, to separate and describe multi‐mover micro‐motions measured by the ultra‐wideband radar. These 3D points contain the range–velocity–time information simultaneously. By dividing points in the 3D space instead of single Doppler domain, micro‐Doppler signatures of each target can be separated effectively. Multi‐people motion simulation results verify the effectiveness of the authors' method.