Development of a Passive Localization Method using Multi-link MIMO Sensor Network

In our previous study, a multipath RTI (Radio Tomographic Imaging) method for a high-precision passive localization of targets within an indoor environment was developed. This method achieves highly accurate positioning by separating multipath components (MPCs) among sensor nodes and utilizing them as virtual nodes, thereby significantly reducing the number of sensor nodes compared to conventional methods. This paper presented a system configuration based on a multi-link multiple-input-multiple-output (MIMO) sensor network where MPCs are separated by spatiotemporal MIMO beamforming. The validation of the proposed scheme was shown by computer simulation.