Multipath processing for GPS receivers

   
   

A GPS receiver system determines the presence of trackable signals at code delays less than the prompt delay being tracked for a particular signal and changes the prompt delay to correspond to the smallest code delay having a trackable signal. Trackable signals at large code delays are multipath signals and may be separately tracked to aid in dead reckoning. The trackable signals at code delays not adjacent to the current tracked prompt delay may be tracked in the same channel as the prompt delay so that all satellite channels are continuously evaluated for multipath signals being tracked or a non-satellite specific channel may be used to sequentially step through the satellite signals to evaluate multipath on a satellite by satellite basis.

Um sistema do receptor do GPS determina a presença de sinais trackable no código atrasa menos do que o alerta atrasa ser seguido para um sinal particular e muda o alerta atrasa para corresponder ao código o menor atrasa ter um sinal trackable. Os sinais de Trackable no código grande atrasam são sinais multipath e podem separada ser seguidos para ajudar na conta inoperante. Os sinais trackable no código atrasam não junto ao alerta seguido atual atrasam podem ser seguidos na mesma canaleta que o alerta atrasa de modo que todas as canaletas satellite sejam avaliadas continuamente para os sinais multipath que estão sendo seguidos ou uma canaleta específica do non-satélite possa ser usada pisar sequencialmente através dos sinais satellite avaliar multipath em um satélite pela base satellite.

 
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