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Table 1 Comparison of computation complexity

From: DOA estimation of spectrally overlapped LFM signals based on STFT and Hough transform

Algorithm

Computation complexity

TF-MUSIC [7]

O(NM2Ls2log2Ls)

STFT-FBSS-MUSIC [25]

O(NKLs2log2Ls)

The reference [24]

O(NMLs2log2Ls + Δ1)

The proposed algorithm

O(NMLs2log2Ls + Δ2)