Method For Improving the Tracking of a Data Transmission Signal of a Satellite Navigation System

摘要

A method for improving tracking of a data transmission signal emitted to a receiver of a satellite navigation system in addition to navigation signals emitted by satellites to a satellite positioning receiver, comprises: transmission to the receiver, during a improvement period, and by an improvement signal emitted in coherence with said data transmission signal, of data Ni or other data Nai to predict said data, said data transmitted to the receiver by the data transmission signal during a transmission period starting after the improvement period, reception, by the receiver, of said data Ni or other data Nai which are transmitted by the improvement signal, generating the symbols serving to modulate the data transmission signal during said transmission period by said data Ni received or other data Nai received, tracking the data transmission signal while removing the effect of the modulation of said data transmission signal by the symbols generated.

主权项

1. A method for improving the tracking of a data transmission signal emitted to a receiver of a satellite navigation system in addition to navigation signals which are transmitted to it by the satellites, comprising:
transmission to the receiver, during a period called the improvement period TAAi, and by means of an improvement signal emitted in coherence with said data transmission signal, of data Ni or of other data Nai making it possible to predict said data Ni, said data Ni furthermore being transmitted to the receiver by means of the data transmission signal during a transmission period TAi starting after the end of the improvement period TAAi, reception, by the receiver, of said data Ni, or of said other data Nai, which are transmitted by means of the improvement signal, generating symbols serving to modulate the data transmission signal during said transmission period TAi, by means of said data Ni received or of the other data Nai received by the receiver and which have been transmitted by means of the improvement signal, and tracking the data transmission signal while removing the effect of the modulation of said data transmission signal by the symbols generated.