Implementing real-time variable fractional delay line in Matlab

1. How to implement delay in Matlab?
2. How to find time delay in matlab?
3. What is fractional delay?
4. What is a Farrow filter?

How to implement delay in Matlab?

Delay Signal by Integer Number of Samples

fs = 1.0e4; t = 0:1/fs:0.005; signal = cos(2*pi*1000*t)'; Set the delay to 5 samples (0.5 ms). shifted_signal = delayseq(signal,5); Plot the original and delayed signals.

How to find time delay in matlab?

d = finddelay( x , y ) returns an estimate of the delay d between input signals x and y . Delays in x and y can be introduced by prepending zeros. d = finddelay( x , y , maxlag ) uses maxlag to find the estimated delay(s) between x and y .

What is fractional delay?

Fractional delay filters are aimed at shifting a digital sequence by a noninteger value, through interpolation and resampling combined into a single convolution filter. This example demonstrates the design and implementation of fractional delay FIR filters using tools available in the DSP System Toolbox™.

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.