G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 5/14 (2006.01) G01S 1/00 (2006.01) G01S 5/00 (2006.01) H04B 1/04 (2006.01) H04B 7/185 (2006.01)
Patent
CA 2245798
A wireless terminal and auxiliary system are disclosed that enable the wireless terminal to determine its location based on signals transmitted from navigation satellites. In particular, the tasks of signal acquisition and signal processing required of a wireless terminal in the prior art are divided between the wireless terminal and the auxiliary system in accordance with the illustrative embodiment. The auxiliary system assists the wireless terminal by acquiring information about the satellites' ephemerides, by partially processing it and by transmitting the partially processed information to the wireless terminal in a form that is useful to the wireless terminal. The wireless terminal then uses the partially processed information from the auxiliary system to assist the wireless terminal in acquiring the ranging signals from the navigation satellites quickly and when they are weak.
Terminal sans fil et système auxiliaire, permettant au terminal sans fil de déterminer sa position en fonction de signaux transmis par des satellites de navigation. En particulier, les tâches d'acquisition de signal et de traitement de signal exigées d'un terminal sans fil dans les versions antérieures sont divisées entre le terminal sans fil et le système auxiliaire conformément à la version présentée comme exemple. Le système auxiliaire aide le terminal sans fil en acquérant de l'information sur les éphémérides des satellites, en traitant en partie cette information puis en transmettant l'information ainsi traitée au terminal sans fil sous une forme utile à ce dernier. Ensuite, le terminal sans fil utilise cette information partiellement traitée afin d'acquérir les signaux de mesure de distance provenant des satellites de navigation rapidement et lorsqu'ils sont faibles.
Richton Robert Ellis
Vannucci Giovanni
Kirby Eades Gale Baker
Lucent Technologies Inc.
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