Discrete-time system getting the true frequency from normalized frequency

1. How do you convert normalized frequency to actual frequency?
2. How do you calculate discrete-time frequency?
3. What is normalized cut off frequency?
4. What is normalized frequency in DSP?

How do you convert normalized frequency to actual frequency?

To convert normalized frequency back to hertz, multiply by half the sample frequency.

How do you calculate discrete-time frequency?

A discrete-time signal of fundamental period N can consist of frequency components separated by 2π/N radians or f = 1/N cycles.

What is normalized cut off frequency?

Normalized frequency is a ratio of a specific frequency (e.g., the cutoff frequency for a filter) to twice the sampling frequency. For example, if the sampling frequency is 8000 Hz, and you want to filter at the 500 Hz point, then the normalized frequency would be 500/(2*8000) = 5/160.

What is normalized frequency in DSP?

In digital signal processing (DSP), a normalized frequency (f′) is a quantity that is equal to the ratio of a frequency and a characteristic frequency of a system. A typical choice of characteristic frequency is the sampling rate (f_s) that is used to create the digital signal from a continuous one.