Scatter comparison of different methods for two closely sources imping from (θ₁, ϕ₁) = (10°,20°) and (θ₂, ϕ₂) = (12°,22°) with snapshots = 100 and SNR = 0 dB. (a) Scatter plot of the ESPRIT method, (b) scatter plot of the RD PSS method, (c) scatter plot of the PARAFAC method, and (d) scatter plot of the proposed method.