Weighted Lagrangian interpolating FIR filter

The aim of this paper is to present an algorithm for the coefficients of a weighted Lagrangian interpolating FIR filter. The proposed filter is effective in the reduction of amplitude response sidelobes responsible for aliasing. The novelty of the proposed L-th band interpolating filter lies in that it allows for a simultaneous L-fold interpolation and fractional sample delaying of an input signal. The filter can be recommended for on-line resampling in variable delay situations especially when implemented in the so-called modified Farrow structure.