Efficient implementation of class of isotropic quadratic filters by using Walsh-Hadamard transform

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

5 Scopus Citations
View graph of relations


Related Research Unit(s)


Original languageEnglish
Pages (from-to)1306-1308
Journal / PublicationElectronics Letters
Issue number16
Publication statusPublished - 5 Aug 1999


A method is proposed for the efficient implementation of a class of second-order Volterra filters where their quadratic kernels are recursively constructed from a set of isotropic subkernels (ISKs). The quadratic kernel of this class of filters can be factorised into a diagonal form by a Walsh-Hadamard transform (WHT) and be implemented using a transform-and-multiply structure. An algorithm for determining the quadratic ISK kernel for the nonlinear prediction of speech signals is presented.