Register to reply

How to obtain the sampling frequency of frequency data

by biscuits
Tags: sampling frequency
Share this thread:
biscuits
#1
May20-12, 08:12 AM
P: 4
Hi everybody, this is my first question in this forums.

I have some complex data in Matlab the absolute value of which represent a frequency response. My data extend from 1 Hz to 20 kHz and have an incremental frequency of 1 Hz.

I now need to convert this frequency responses in Impulse responses in order to measure the duration of this Impulse response. I am a bit confused though on what is the sampling frequency of my data. I need this information I guess in order to calculate time.

Is it the highest frequency of my dataset (that is 20 kHz) or double this frequency (40 kHz).

Thanks
Phys.Org News Partner Engineering news on Phys.org
Printing the metals of the future
New gadget helps the vision-impaired to read graphs
3D printing helps designers build a better brick
boneh3ad
#2
May23-12, 07:28 AM
PF Gold
boneh3ad's Avatar
P: 1,490
Assuming I have understood you correctly, you essentially have a Fourier transform of a signal as this data set you are talking about? Your sampling frequency will be double the maximum resolved frequency. It is the concept of the Nyquist frequency.


Register to reply

Related Discussions
Effect of sampling frequency change in OFDM Electrical Engineering 0
Frequency of ultrasounds to obtain oil drops in water? Introductory Physics Homework 2
Sampling frequency Electrical Engineering 2
Trouble understanding fft norm axis sampling frequency etc Electrical Engineering 2
Spectral resolution with variable sampling frequency Electrical Engineering 0