| 摘要 |
A method of frequency-domain filtering is provided that includes a plurality of filters, the plurality of filters including at least one constrained filter(s) W=I, I and at least one unconstrained filter(s) W=1, K−The method includes cascading the W k=i, K unconstrained filter(s). A single constraint window C is applied to the cascaded W=i, K unconstrained filter(s). The W=1, I constrained filter(s) are cascaded with the constrained cascaded Wk=1, K unconstrained filter(s) to form a resulting filter Wll=C(W 1{circle around (x)} . . . {circle around (x)} W) {circle around (x)} W . . . W. The frequency domain representation of the single constraint window C may be based, at least in part, on a time domain representation of a single constraint window C that has been circularly shifted such that the frequency domain representation of the constraint window matches a property of the frequency domain representation of the cascaded W=1, K unconstrained filters. |
