A new approach of indoor positioning has recently been proposed: the repealite system. It aims at providing a continuity of the positioning service through the use of GNSS (Global Navigation Satellite Systems) signals, thus leading to a single technological mean, the GNSS receiver, for both outdoors and indoors. A few error sources have to be dealt with in order to reach sub-meter accuracy, among which one has to cite multipath and near-far effects. The goal of this paper is to describe the way we envisaged to reach an indoor sub-meter accuracy and the real implementation of the system. A few positioning results are also provided.