| 摘要 |
<p>The subject of the present invention is a system for positioning an object in a constrained zone, comprising: - a set of pseudolites distributed in said constrained zone and each exhibiting a spreading code corresponding to the spreading code of a satellite belonging to a constellation of satellites of a satellite navigation system, said constellation of satellites comprising at least one first set of satellites (S1) and one second set of satellites (S2)of disjoint visibility, - and a receiver situated on the object to be located, the pseudolites being distributed in the constrained zone in such a way that at any point of the constrained zone, it is possible for the receiver of the object to acquire the positioning signals of at least two pseudolites exhibiting spreading codes corresponding, for the one, to a satellite of the first set (S1), and, for the other, to a satellite of the second set (S2) in such a way that the receiver receiving these positioning signals detects the impossibility of them being signals emitted by satellites of the constellation of satellites and consequently determines in a totally autonomous manner that it is receiving positioning signals emitted by pseudolites.</p> |
