Functionally weighted lagrange interpolation of band-limited signals from nonuniform samples
IEEE Transactions on Signal Processing
Design of barycentric interpolators for uniform and nonuniform sampling grids
IEEE Transactions on Signal Processing
Minimax design of low-complexity allpass variable fractional-delay digital filters
IEEE Transactions on Circuits and Systems Part I: Regular Papers
Regularized sampling of multiband signals
IEEE Transactions on Signal Processing
A new criterion for the design of variable fractional-delay FIR digital filters
IEEE Transactions on Circuits and Systems Part I: Regular Papers
| Hi-index | 0.01 |
A variable fractional delay (VFD) filter is presented that constitutes an efficient alternative to the usual Farrow structure. The filter is constructed by multiplying the signal to interpolate by a window with proper truncation properties, and then applying the sampling theorem. The resulting interpolator involves less arithmetic operations than the existing variants of the Farrow structure. Besides, if its coefficients are numerically optimized, its performance is close to that of the FIR equi-ripple filter. The final part of the correspondence includes a description of the VFD filter implementation corresponding to this interpolator.