Soft-db Zen-Ten User guide Instrukcja Użytkownika Pobierz pdf (Strona 16)

User manual for the ZEN 3-channel X-LMS controller Soft dB inc.

3.2 Description of the control algorithm for the coupled case

Figure 9 shows a schematic of the coupled version of the controller. Unlike Figure 5

which shows the uncoupled version, the secondary cross-paths CxEy (x≠y) are now

included. This implies three optimizations for each channel using all error signals. This

algorithm requires three times the computation time of the uncoupled version.

Figure 9: Schematic for the coupled version of the control algorithm

The X-LMS optimization for a specific channel is computed in three steps with these

equations:

EOutCEMuWxWx xnormxn

⋅⋅+=

,,,

EOutCEMuWxWx xnormx

⋅⋅+=

1 EOutCEMuWxWx xnormx

n ⋅⋅+=+

Where OutCxEy is the output of the secondary control path filter CxEy.

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Soft-db Zen-Ten User guide Instrukcja Użytkownika Strona 16