Method for jamming communications in a closed-loop control network

A method for selectively and dynamically optimizing, with reduced fratricidal effects, the jamming of P predefined areas or positions in a network of communication transmitters, jammers and receivers comprising a plurality N_pl of platforms, a number M≦N_pl of said platforms being equipped with antennas and systems for transmitting useful transmission signals, a number N≦N_pl of said platforms being equipped with antennas and systems for receiving useful transmission signals, a number J≦N_pl of said platforms that are managed by a master station (1) being equipped with jamming systems and antennas suitable for preventing the transmissions between entities that are external to said network, comprising at least the following steps:

• measuring the useful communication signals received by all of the N reception platforms, taking these measurements as a basis for estimating M*N useful propagation channels, and transmitting these measurements to the master station managing the platforms equipped with the jamming antennas,
• measuring all of the jamming signals received by the N reception platforms, taking these measurements as a basis for estimating J*N fratricidal propagation channels, and transmitting these measurements to said master station,
• taking the measurements of the useful communication signals and propagation channels and of the jamming propagation signals and channels as a basis for calculating, in the master station, jamming instruction values, the jamming signals, the recurrence of the transmissions, the carrier frequencies for the transmissions, the leads/delays upon transmission in relation to a synchronization reference, the radiated equivalent powers, the amplitude and phase weightings on the transmitting antenna networks and on the jamming antennas, guaranteeing an effectiveness for the P areas to be jammed corresponding to the entities that are external to the network, while minimizing the fratricidal effects on the N reception platforms,
• transmitting these instructions to the J platforms equipped with a jamming antenna,
• taking the first calculated and applied instructions, while continuously making use of the measurements from the fratricidal propagation channels coming from the receiving platforms, as a basis for optimizing by means of iteration the jamming of the areas to be jammed while maintaining fratricidal jamming which is acceptable for the quality of the useful transmissions.