Hi everybody,

I need some help to get me started on this one:

I have a transfer function (a frequency response) that is generated by two datasets.
I need to convert this frequency response (FR) to the time domain (I guess by using the ifft function in Matlab) in order to obtain the impulse response (IR) and see how long it is in seconds.

What confuses me is if an impulse (IR) has N samples then the fft would have N/2+1 samples (please correct me if I am wrong). The rest of the samples in the FR are disregarded as they are symmetrical.

Now, if I have the FR I could go back to IR by ifft. But that would give me only N/2+1 samples. I need N for the impulse response. How do I deal with this?

Moreover, how can I determine the sampling frequency (fs) of my FR in order to calculate the duration of the IR in seconds?
My FR expands from 20 to 10000 Hz with a step of 20 Hz. Is it in this case that fs=20?

thank you for your patienceHi everybody,

I need some help to get me started on this one:

I have a transfer function (a frequency response) that is generated by two datasets.
I need to convert this frequency response (FR) to the time domain (I guess by using the ifft function in Matlab) in order to obtain the impulse response (IR) and see how long it is in seconds.

What confuses me is if an impulse (IR) has N samples then the fft would have N/2+1 samples (please correct me if I am wrong). The rest of the samples in the FR are disregarded as they are symmetrical.

Now, if I have the FR I could go back to IR by ifft. But that would give me only N/2+1 samples. I need N for the impulse response. How do I deal with this?

Moreover, how can I determine the sampling frequency (fs) of my FR in order to calculate the duration of the IR in seconds?
My FR expands from 20 to 10000 Hz with a step of 20 Hz. Is it in this case that fs=20?

thank you for your patience Hi everybody,

I need some help to get me started on this one:

I have a transfer function (a frequency response) that is generated by two datasets.
I need to convert this frequency response (FR) to the time domain (I guess by using the ifft function in Matlab) in order to obtain the impulse response (IR) and see how long it is in seconds.

What confuses me is if an impulse (IR) has N samples then the fft would have N/2+1 samples (please correct me if I am wrong). The rest of the samples in the FR are disregarded as they are symmetrical.

Now, if I have the FR I could go back to IR by ifft. But that would give me only N/2+1 samples. I need N for the impulse response. How do I deal with this?

Moreover, how can I determine the sampling frequency (fs) of my FR in order to calculate the duration of the IR in seconds?
My FR expands from 20 to 10000 Hz with a step of 20 Hz. Is it in this case that fs=20?

thank you for your patience impulse response MATLAB Answers — New Questions

​