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Table 1 Computational effort for the identification of an HGM by a time-domain NLMS algorithm

From: Significance-aware filtering for nonlinear acoustic echo cancellation

Computed quantity Equation Multiplicity Required operations
    FFT CMUL CADD RMUL RADD RDIV
Branch signals (7) b n/a n/a n/a n/a n/a n/a
Output signal (8)   0 0 0 BL B(L−1) 0
Error signal (9)   0 0 0 0 1 0
Input power (11) b 0 0 0 B 0 0
Frame energy (12) b 0 0 0 0 2B 0
Normalized error (13) b 0 0 0 B B B
Filter coefficients (14) b,l 0 0 0 BL BL 0
   Accumulated: 0 0 0 2B(L+1) 2B(L+1)+1 B
     Total: B(4L+5)+1 FLOPs