Precomputation of GNSS Message Modulating Sequence

摘要

GNSS development created numerous methods of compensating errors caused by multipath propagation of signals. One of them is the method of extra-long coherent accumulations. The basic idea behind the method is to coherently process the signal on a time span longer than one GNSS information symbol (20 ms). Knowledge of modulating symbols in the navigation message is mandatory to implement the method. The paper proposes to precompute the modulating symbols using navigation data available in the user's receiver.