TDOA localization in ir UWB systems

The influence of the IEEE 802.15.4a channel model parameters on the performance of the Time Difference Of Arrival (TDOA) localization method in Impulse Radio Ultra-Wide Band (IR UWB) systems is addressed. As a consequence of the cluster structure of the stochastic 802.15.4a channel model some channel parameters between the IR UWB transmitter and each of the reference sensor nodes in the sensor array are spatially correlated. This quasideterministic structure of channel parameters is assumed, when a spatial signal model on sensor array is based on this channel model for TDOA localization purposes. Thus, the influence of channel correlation as well as geometrical arrangement of the reference sensor nodes on the positioning accuracy is the main focus of our investigation.