A location system for indoor at 24 GHz with submillimeter precision

In this paper a new high resolution GPS-based system for indoor is presented. The common systems used for this purpose are not very accurate and usually expensive. The proposed approach allows to obtain systems which are both very accurate and low cost. It is based on the wideband spread spectrum technique at 24 GHz, and achieves an accuracy better than 0.5 millimeter even when the target is moving. The peculiarity of this positioning system compared to others is the fully analog correlation which improves the cost-effectiveness of the system.