Ultrawideband Tomographic Imaging in Multipath-Rich Environment

This letter studies the problem of ultrawideband (UWB) tomographic imaging for unknown building layouts where the multipath-rich condition is considered. Specifically, first, the multiple propagation paths of the UWB signal are analyzed, and a delay estimation algorithm is proposed to estimate the direct path (DP) delay from the multipath signal. Then, a tomographic projection model is established by mapping the relationship between the delay of the DP and the relative permittivity of the unknown layout. Besides, a modified total variation method is developed to reconstruct the building layout, which shows significant performance in preserving the edges of the structure. Finally, the effectiveness of the proposed algorithm is verified using both simulated and real data.

Automated summary

This study investigates the problem of ultrawideband (UWB) tomographic imaging for unknown building layouts considering multipath conditions. A delay estimation algorithm is proposed to estimate the direct path delay, and a tomographic projection model is established mapping the relationship between delay and relative permittivity. A modified total variation method is developed for building layout reconstruction, showing significant performance in preserving structure edges. The effectiveness of the algorithm is verified using simulated and real data.