Synthetic robust adaptive beamforming

摘要

A method for beamforming digitized signals from a sensor array to enhance signals originating from a preselected angle of interest and a preselected range bin while suppressing interference signals from other angles of arrival. Snapshots of sensor data are acquired and used to estimate an autocorrelation function. An autoregressive model of power is determined over angles of arrival as polynomial coefficients and roots are calculated as associated with the interference signals. Roots are selected for suppression by providing nulls. Exponentials are constructed from the roots. The exponentials are used with variances from the autoregressive model to provide a synthetic covariance matrix having weights that suppress the interference signals.