Patent ID: 9071385
Filing Date: 2015-06-30
Classification: H04K

Abstract:
1. 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.