Indoor and Pedestrian Applications

Channel-SLAM: Multipath Assisted Positioning

  • Usually, multipath reception degrades the accuracy of time of arrival based position estimation as long as the receiver uses standard methods
  • In Channel-SLAM, each multipath component is treated as a direct path between a virtual transmitter (VT), which location is unknown, and the receiver
  • Channel-SLAM estimates the receiver position and the positions of the VTs simultaneously, thus, the approach does not require any prior information such as a room-layout or a database for fingerprinting

Multipath-Enhanced Device-Free Localization

  • Device-free localization systems rely on user-induced power changes in the received signals within underlying wireless networks.
  • Current device-free localization systems solely consider links in line-of-sight
  • User-induced fading, however, can be also observed in the received power of reflected and scattered signals, i.e., multipath components
  • The corresponding propagation paths differ spatially from those in line-of-sight. Thus, we propose to incorporate multipath components to device-free localization enhancing both coverage and accuracy