A Two-dimensional Wideband Single-channel Direction Finding Method Based on 1bit Time-modulated Array

In this paper, a two-dimensional wideband single-channel direction finding method is proposed. The subspace of multi-order harmonic components is used to achieve single-channel direction finding by spatial spectrum estimation. By further designing a two-layer uniform circular array, the ambiguity problem caused by the array spacing constraint is solved in direction finding, and the working bandwidth of the system is effectively improved. Numerical simulations verify the effectiveness of the proposed method with two-dimensional direction finding under the condition of three octave working bandwidth.