Re: Xlating FIR filter delay

[Angilberto Muniz Sb]

Yes Marcus, I'm interested in the "excess" delay, thats why I need to cancel the group delay.

Guess I've found the answer:

(len(filter_taps) - 1) / 2

Will try it..


Angilberto.

Em quinta-feira, dezembro 19, 2019, 9:16 AM, Müller, Marcus (CEL) <address@hidden> escreveu:

Hi Angilberto,

am I right to assume that you already are considering the group delay
of the filter that you specified and there's "excess" delay beyond
that?

Best regards,
Marcus

On Wed, 2019-12-18 at 19:59 +0000, Angilberto Muniz Sb wrote:
> Hi all,
>
> I have a dual tone signal that I down convert and split into two common frequency signals with the Xlating-fir filter. So far so good.
>
> However I noticed there is a phase shift between the signals generated (I assume this is due the filter delay). I have to compensate for that.
>
> The question: How to determine or estimate that delay?
>
> Thank you,
>
>
> Angilberto.