• (v) Minimize
•
• over Dw Î D point-wise across frequency. The minimization
itself produces a new scaling function
.
• (vi)
Compare with the previous estimate Dw , Stop if they are close, otherwise, replace Dw with
and return to step (ii).
qThe joint optimization of D and K is not convex and the global convergence is not
guaranteed, many designs have shown that this approach works well.