Direction Finding by Time-Modulated Circular Array with Amplitude Comparison

In this paper, a novel direction finding method using the power spectrum characteristics in parallel with the amplitude comparison is proposed in time-modulated circular array (TMCA). The direction of arrival (DoA) of the incident signal in azimuthal angular range of 360° is estimated by the TMCA with high accuracy. In addition, angular ambiguity is reduced through the amplitude comparison without additional hardware. As a result of the direction finding performance by proposed method is provided with a four-element TMCA.