CIC passband compensation

GNU Radio
1

Hi,

I am trying to understand the USRP receive chain response and referred
to earlier posts that gave me almost all the information that I needed.
However, I am unsure whether the HB filter compensates for the passband
droop that occurs in the CIC. My understanding of the CIC was that the
frequency response has a sinc like function and is typically followed by
a FIR which compensates for the sinx/x shape in the passband. Does the
HB filter response compensate for the non-flat passband of the CIC?

Thanks,
Nirali

2

Hi Patel,

No [CIC non flat response] compensation filter is available.

Firas

Nirali P. wrote:

Thanks,
Nirali

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3

Hi Firas,

Thanks for your response. In an earlier thread you had posted a matlab
script called usrpddc.m that calculates the overall frequency response
of the usrp rx chain and plots it. This would be very useful to me
however, when I try to run it I find it is missing mfilt.cicdecim()
function. If you still have this and could make it available it will be
a great help.

Thanks
Nirali

Hi Patel,

No [CIC non flat response] compensation filter is available.

Firas

4

Hi Nirali

The function mfilt.cicdecim() is a standard MATLAB function. Check
Filter
design tool.

Regards,
Firas

Nirali P. wrote:

Nirali

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