Calibration of a UWB Sub-Band Channel Model Using Simulated Annealing

Abstract

This communication presents a calibration method of an indoor UWB sub-band deterministic channel model by means of simulated annealing. Based on the characterization of the channel at sub-bands with a subset of measurement locations, the calibration optimizes the dielectric material parameters of the environment, which improves the accuracy of the model in terms of path loss (L) and time dispersion parameters (root mean square delay spread sigma <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">tau</sub> and maximum excess delay tau <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">max</sub> ) at all test locations within the test area. The performance of the calibration has been assessed by two indoor measurement campaigns, including line of sight (LOS) office and corridor and non line of sight (NLOS) corridor-office at the Antenna, Propagation and Networking Section building at Aalborg University and at the building of the Institut fur Nachrichtentechnik at Braunschweig Technical University. A reasonable performance of the calibration is noticed in improving the model accuracy within the building, requiring a few pilot measurements.