The procedure involves identifying Doppler frequencies associated to vehicles situated in a field covered by a wave emitted by an antenna, in each Doppler signal obtained at successive instants. Theoretical function of evolution is calculated for a speed and a given angle alpha, based on time of the Doppler frequency that is associated with a vehicle. Searched speeds are deduced from selected Doppler frequencies. The selected Doppler frequencies correspond to the same vehicle. An Independent claim is also included for a device to install a procedure.
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