METHODS AND SYSTEMS FOR SHARED SOFTWARE AND HARDWARE CORRELATORS

摘要

Methods and systems are provided for switching between IF signal streams whose samples are correlated by hardware correlators or by software correlators or by both types of correlators. Correlation tasks for acquisition and tracking of CDMA signals are shared between software and hardware correlators. In some embodiments of the invention the majority of the acquisition processing is carried out by software correlators and the majority of the signal tracking is carried out by hardware correlators. In other embodiments of the invention the hardware correlators acquire and track one type of satellite signals and the software correlators acquire and track another type of satellite signals. Different types of satellite system signals that the invention can be used with include GPS, GLONASS and Galileo signals.