a scenario contaminated with strong jammers on other interferers the detection is based on the geodesic distance between the correlation matrix of the received signal and the correlation matrix of the target spectrum which is assumed known in shape and bandwidth the detection happens when the threshold is overcome the frequency location is based on the minimization of the mean square error between rd and rt application_number US 99533608 A description here below a practical implementation of the invention is described for a generic scenario as illustrated in fig1 as part of a radiofrequency receiver performing the steps of the method for detecting and locating spectral shapes in radiofrequency signals shown in fig1 there is a front end circuit 3 with means for receiving in a frequency band at least one waveform of a rf signal and obtaining from it an input data signal at a baseband frequency also the radiofrequency receiver comprises a signal processing device 4 which carries out the detection and location of a target spectrum ts the front end circuit 3 processes the received rf signal to obtain an input data signal to be further processed by the signal processing device 4 firstly said front end circuit 3 of the radiofrequency receiver filters the rf signal to a frequency band of interest fb this front end circuit 3 comprises a low noise power amplifier for amplifying the filtered signal the next process performed by a local oscillator in the front end circuit 3 is mixing the amplified and filtered signal in order to produce either a signal at intermediate frequency if or a signal at baseband in case that the signal is at intermediate frequency the so called if sampling.