Joint signal frequency and 2-D DOA estimation based on space-time processing approach

In this paper, we present a space-time algorithm to estimate the carrier frequency, azimuth and elevation angles of multiple independent sources based on arbitrary array. The algorithm transfers the observed data from space domain to 2-D space-time domain by exploiting the cross-correlation of the array outputs, constructs space-time cross-correlation matrixes. The algorithm only needs three guiding sensors, and using 2-D ESPRIT can estimate carrier frequency, azimuth and elevation angles of multiple independent sources which have different carrier frequency. The simulation results show the effectiveness of the method.