GNSS signal acquisition in the presence of sign transitions
- Publication date
- Publisher
- Helios
Abstract
The next generation of Global Navigation Satellite
Systems (GNSS), such as Galileo [1] and GPS
modernization [2], will use signals with equal code
and bit periods, which will introduce a potential
sign transition in each segment of the signal
processed in the acquisition block. If FFT is used to
perform the correlations a sign transition occurring
within the integration time may cause a splitting of
the main peak of the Cross Ambiguity Function
(CAF) into two smaller lobes along the Doppler
shift axis [3]. In this paper a method to overcome
the possible impairments due to the lobe splitting is
proposed and validated by simulation