Figure 2From: 2D DOA estimation with sparse uniform circular arrays in the presence of mutual coupling Δ a ̃ b i θ , ϕ i = 1 , 2 over azimuth angle ϕ and elevation angle θ for a sparse UCA: (a) Δ a ̃ b 1 θ , ϕ and (b) Δ a ̃ b 2 θ , ϕ .Back to article page