bsn1.m implements a zerophase low pass filter using a novel structure called B-Spline Networks (BSN).

This function was originally developed for use with the LFFC (learning feedforward control).

A nice aspect is that, a parametric transfer functon can be obtained for BSN.

For details, see
Chen Y, Moore KL, Bahl V, "Improved Path Following of USU ODIS by Learning Feedforward Controller Using Dilated B-Spline Network," IEEE International Symposium on Computational Intelligence in Robotics and Automation, Banff, Alberta, Canada, July-August 2001,

PDF file is at
http://www.csois.usu.edu/publications/pdf/pub049.pdf