A low power RF receiver (1) has an antenna (2), a reception and
shaping
stage (3) for the radio-frequency signals provided by the antenna, a 12-channel
correlation stage (7) receiving intermediate signals (IF) shaped by the
reception stage (3), and a microprocessor (12) connected to the correlation
stage for calculating X, Y and Z position, velocity and time data as a function
of data provided by the radio-frequency signals, such as GPS signals, transmitted
by satellites. Each channel includes a correlator (8) associated with a
controller (9), which also includes a digital signal processing algorithm
to allow all the synchronisation tasks for acquiring and tracking a satellite to
be performed autonomously when the channel (7) is set in operation,
and to lock onto the satellite. Buffer registers (11) are placed at the
interface between the correlation stage (7) and the microprocessor (12)
for the mutual transfer of data. The low power RF receiver may be mounted in the
case of a watch and powered by the energy accumulator or battery of the watch.
