Method of processing a navigation signal containing data

Details Method of processing a navigation signal containing data Method of processing a navigation signal containing data

G - Physics

01

S

G01S 19/29 (2010.01)

Patent

CA 2470375

The invention relates to methods of processing satellite navigation signals which also contain data. The inventive method consists in using two nested carrier loops; one comprising a DBPSK differential-type extended demodulator (115) which is used to maintain the dynamics, and another comprising a BPSK-type non-extended demodulator (117), so as not to correlate the code errors. The invention enables the use of a much higher data transmission speed which requires the use of a Viterbi-type algorithm.

L'invention concerne les procédés de traitement des signaux de navigation par satellite qui supportent également des données. Elle consiste à utiliser deux boucles de porteuse imbriquées, l'une comportant un discriminateur étendu de type différentiel DBPSK (115) pour tenir la dynamique, et l'autre un discriminateur non étendu de type BPSK (117) pour ne pas corréler les erreurs de code. Elle permet d'utiliser une vitesse de transmission de données beaucoup plus élevée nécissitant l'utilisation d'un algorithme de type "Viterbi".

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