For demodulating radio navigation signals (s(t)) transmitted in spread
spectrum and comprising a data channel modulated by a navigation message
and a pilot channel not modulated by a navigation message, the data
channel and the pilot channel are combined into one multiplexing scheme
so as to modulate a carrier, this method consists in applying
de-spreading processing to the pilot and data channels' signals and in
demodulating the de-spread data signal (r.sub.d) in order to obtain the
navigation message , the demodulation of the de-spread data
signal (r.sub.d) used to obtain the navigation message is
performed using the carrier (r.sub.p) obtained from the dispreading
processing of the pilot channel.