A Review of High Dynamic Carrier Tracking Algorithms Without External Aided Data

Abstract

The traditional PLL (Phase-locked loop) is used to track the GPS signal carrier. However, an unavoidable contradiction between the bandwidth of PLL and the measurement accuracy occurs when PLL works in a high dynamic situation. Consequently some solutions have been studied since 1980s, which can be divided into two categories, namely with or without the aid of external data. The latter is always easy to realize and much cheaper. This thesis presents a review of the pure carrier tracking algorithms with no external aided data. And then examines various problems associated with these algorithms. Finally a corresponding comparison is made and a conclusion of these algorithms is given.