Delaying output equals FIR filtering?

1. What is the delay of a FIR filter?
2. Why does filtering cause delay?
3. What are delay elements in filter?
4. Which has faster response IIR or FIR filters?

What is the delay of a FIR filter?

2.1. 4 What is the delay of a linear-phase FIR? The formula is simple: given a FIR filter which has N taps, the delay is: (N – 1) / (2 * Fs), where Fs is the sampling frequency. So, for example, a 21 tap linear-phase FIR filter operating at a 1 kHz rate has delay: (21 – 1) / (2 * 1 kHz)=10 milliseconds.

Why does filtering cause delay?

Filtering a signal introduces a delay. This means that the output signal is shifted in time with respect to the input. When the shift is constant, you can correct for the delay by shifting the signal in time. Sometimes the filter delays some frequency components more than others.

What are delay elements in filter?

A digital delay line is a discrete element in digital filter theory, which allows a signal to be delayed by a number of samples. If the delay is an integer multiple of samples, digital delay lines are often implemented as circular buffers. This means that integer delays can be computed very efficiently.

Which has faster response IIR or FIR filters?

Therefore, an IIR filter can provide a significantly faster and more efficient filtering operation than an FIR filter. You can design FIR filters to provide a linear-phase response.