Method for retrieving data from ultra wideband radio transmission signals and receiver implementing said method

The present invention concerns a receiver and a method for retrieving data from Ultra wideband radio transmission signals received by a receiver and transmitted in packets containing at least a preamble known to the receiver and a payload containing data unknown to the receiver. The payload data is formed of at least one burst containing at least one pulse. The method comprises the following steps : receiving a signal corresponding to the preamble of a packet by a receiver determining the energy of the received signal determining weighting coefficients pm from the energy of the received signal receiving a signal corresponding to the payload of a packet by a receiver determining the energy of the received signal calculating a threshold depending on the weighting coefficients applying a decision rule based on the sampled energy, weighted by said weighting coefficients pm and depending on said calculated threshold.