Aim of this paper is to present an interference impact
assessment in the context of Global Navigation Satellite
Systems (GNSS), focusing on the new modulations based
on the Multiplexed Binary Offset Carrier(MBOC)
scheme that will be used for modernized GPS L1C and
Galileo E1 civil signals.
Simulation results are presented and discussed in order to
perform a comparative analysis of GPS L1C and Galileo
E1 civil signals in presence of Continuous Wave(CW)
interference. Performance is discussed versus the main
signal and receiver parameters that could affect the
interference robustness of the signals and the receiver. In
detail, both double and single channel (data and/or pilot)
tracking schemes have been assessed, varying the receiver
bandwidth, integration time, correlator type and spacing.
The obtained results show that tracking both data and
pilot channels (correlating the incoming signal with
coherent local replica, including both the channels),
similar performance can be obtained by a receiver for
GPS L1C and Galileo E1 Open Service (OS) signals. On
the other hand, some differences can be noticed when the
receivers take advantage of only one channel (e.g.
tracking only the pilot channels), due to their different
power levels and modulation formats.
Some final remarks are also drawn in order to provide
also some guidelines to the reader on how to reduce the
interference impact on MBOC signals by means of a
proper receiver setup
