Conjugate gradient algorithm for series cascade nonlinear adaptive filters

C. Radhakrishnan, W. K. Jenkins, A. K. Garga

Research output: Contribution to journalConference articlepeer-review


This paper considers series-cascade nonlinear filter architectures consisting of a linear FIR input filter, a memoryless polynomial nonlinearity, and a linear FIR/IIR output filter (LNL). Earlier publications reported on the development of the LMS and RLS backpropagation algorithms for training this same adaptive filter structure. In this paper the Conjugate Gradient backpropagation algorithm is derived for the joint adaptation of the LNL structure. An echo cancellation example is considered to study the algorithm in terms of its learning characteristics and computational complexity.

Original languageEnglish (US)
Pages (from-to)II33-II36
JournalMidwest Symposium on Circuits and Systems
StatePublished - 2004
EventThe 2004 47th Midwest Symposium on Circuits and Systems - Conference Proceedings - Hiroshima, Japan
Duration: Jul 25 2004Jul 28 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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