An interference cancellation technique for satellite communication earth stations

The authors propose a novel interference cancellation technique called IPMM (in-band power minimizing method) and describe its performance characteristics from theoretical and experimental viewpoints. The technique is based on controlling the complex weight signal to minimize the output signal power. A more than 25-dB cancellation was obtained for actual terrestrial microwave signals. The interference signal entering a 1.2-m small earth station antenna from an 11-GHz-band terrestrial microwave link was cancelled using a small horn antenna. It is concluded that this technique is feasible and suitable for practical earth stations.<>