A device for generating complex electromagnetic environments intended to produce test electromagnetic signals for stimulating an electromagnetic sensor comprising N reception channels, placed on a support in a test enclosure comprising an anechoic chamber and a radiating panel formed by at least N radiating sources and configured to be connected to an item of equipment for generating RF excitation signals, and radiating the corresponding electromagnetic wave inside the anechoic chamber towards the hardware under test, mainly comprising: - a module for defining electromagnetic scenes that delivers data that defines the electromagnetic environment to be simulated and to which the sensor under test is to be subjected; - an electromagnetic scenes computer that produces sets of Doppler-distance maps, with each map representing, for a given acquisition sequence and for a given reception channel of the sensor, the frequency distribution, as a function of the distance, of the power of the received signal for the electromagnetic environment defined by the module for defining electromagnetic scenes; - a transfer suppression module that modifies each Doppler-distance map produced by the electromagnetic scenes computer so as to produce a modified Doppler-distance map (2441 to 244N), corresponding to the signal that a given radiating source of the radiating panel must radiate in order to simulate, at the reception channels of the sensor, the desired electromagnetic environment for the corresponding acquisition sequence; - modules for synthesising and amplifying radiofrequency signals, with each module synthesising the RF signal corresponding to a given modified Doppler-distance map (2441 to 244N) produced by the transfer suppression module, the produced RF signal being delivered to a given radiating source; characterised in that said transfer suppression module comprises: - a processor configured to construct the inverse matrix T -1 of the transfer matrix T that characterises the propagation of the electromagnetic waves emitted by the radiating sources of the radiating panel to the reception modules of the sensor for a given Doppler frequency; - a multiplier configured to determine the product of the inverse matrix T - 1 using a reception vector, the N components of which correspond, for a given acquisition sequence of the sensor, to the values of the signal amplitude measured in the same Doppler-distance cell of each of the N Doppler-distance maps (2421 to 242N) produced by the electromagnetic scenes computer for the considered acquisition sequence; the emission vector thus obtained being a vector with N components, with each component representing the value of the amplitude of the signal to be emitted by the radiating source that is considered to be measured for the same Doppler-distance cell of each of the modified Doppler-distance maps delivered by the transfer suppression module. - a module for defining electromagnetic scenes that delivers data that defines the electromagnetic environment to be simulated and to which the sensor under test is to be subjected; - an electromagnetic scenes computer that produces sets of Doppler-distance maps, with each map representing, for a given acquisition sequence and for a given reception channel of the sensor, the frequency distribution, as a function of the distance, of the power of the received signal for the electromagnetic environment defined by the module for defining electromagnetic scenes; - a transfer suppression module that modifies each Doppler-distance map produced by the electromagnetic scenes computer so as to produce a modified Doppler-distance map (2441 to 244N), corresponding to the signal that a given radiating source of the radiating panel must radiate in order to simulate, at the reception channels of the sensor, the desired electromagnetic environment for the corresponding acquisition sequence; - modules for synthesising and amplifying radiofrequency signals, with each module synthesising the RF signal corresponding to a given modified Doppler-distance map (2441 to 244N) produced by the transfer suppression module, the produced RF signal being delivered to a given radiating source; - a processor configured to construct the inverse matrix T -1 of the transfer matrix T that characterises the propagation of the electromagnetic waves emitted by the radiating sources of the radiating panel to the reception modules of the sensor for a given Doppler frequency; - a multiplier configured to determine the product of the inverse matrix T - 1 using a reception vector, the N components of which correspond, for a given acquisition sequence of the sensor, to the values of the signal amplitude measured in the same Doppler-distance cell of each of the N Doppler-distance maps (2421 to 242N) produced by the electromagnetic scenes computer for the considered acquisition sequence; the emission vector thus obtained being a vector with N components, with each component representing the value of the amplitude of the signal to be emitted by the radiating source that is considered to be measured for the same Doppler-distance cell of each of the modified Doppler-distance maps delivered by the transfer suppression module.