Howtosignalprocessing
What is fractional delay filter?
A fractional delay filter is a filter of digital type having as main function to delay the processed input signal a fractional of the sampling period time.
What is a Farrow filter?
A Farrow filter structure provides variable fractional delay for the received data stream prior to downstream symbol sampling. This special FIR filter structure permits simple handling of filter coefficients by an efficient polynomial interpolation formula implementation to provide variable fractional resampling.
What is Farrow structure?
The Farrow Structure provides an efficient way to implement the interpolation filter using polynomial approximation method for arbitrary sample rate change. The lagrange polynomial approximation method provides almost exact reconstruction of the new interpolated signal as of the input sampled signal.
