Soft dB Zen-Ten User guide - Manual (Page 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:
1 1
, E OutC E Mu Wx Wx
x normx n n
⋅ ⋅ + =
2 2
, ,,
E OutC E Mu Wx Wx
x normx n n
⋅ ⋅ + =
3 3
,,
1
E OutC E Mu Wx Wx
x normx n n
⋅ ⋅ + =
+
Where OutCxEy is the output of the secondary control path filter CxEy.
ZEN User Manual p. 16