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Broadband-interference rejection for mobile satellite communications

The radiation pattern of the null-steering array in Figure 5 agreed well with the simulations in Figure 4. By taking advantage of the jamming signal's broader bandwidth, the interference-detection channel controlled the adaptive null-steered array, in order to steer the null in the direction of the interfering signal. The system was able to suppress a 20-Watt, 20-MHz jammer that was six feet from the satellite receiver and that overlapped the satellite signals bandwidth, to a SIR of better than 13dB. Since the system was adaptive, it was also able to suppress jamming signals that were moving relative to the satellite receiver.