Importance of the exclusion of the desired signal from the control of a generalised sidelobe canceller

A generalised sidelobe canceller (GSC), which operates by intentionally excluding the desired signal, is proposed. By excluding the desired signal from the primary input, the convergence rate is greatly improved. The response of the system can further be accelerated by using a forgetting factor of small value, without serious loss in the output signal to interference plus noise ratio (SINR). The system is also robust, in the sense that it can satisfactorily protect the desired signal from suppression in the presence of pointing errors and coherent interferences as well. An angular domain notch filter is incorporated into the conventional GSC to exclude the desired signal component