Adaptive filtering in sub-bands, that is adapting several short filters in parallel on sub-sampled frequency subbands, is an attractive alternative to implement a long adaptive FIR filter, this both for computational efficiency and for faster convergence. The sub-sampling process introduces aliased versions of the original signals; it is shown how to annihilate these by adequate adaptive cross-terms. The computational complexity is improved nearly proportionally to the number of sub-bands, and the convergence speed is improved as well, making this scheme attractive for applications like acoustic echo cancellation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.