Re: [Discuss-gnuradio] dynamically changing delay in gr_delay (or history in any gr_block)

[Achilleas Anastasopoulos]

Take a look at the attached grc file:

As implemented, it does not work (changing the delay does not have an effect).

If I introduce the "fictitious" filter (1,0,0,0,0,..)
it works as expected.

AM I doing something wrong in the first case?

Achilleas

On Tue, Nov 15, 2011 at 5:26 PM, Marcus D. Leech <address@hidden> wrote:
> On 11/15/2011 05:01 PM, Achilleas Anastasopoulos wrote:
>>
>> I actually tried using filters to implement the delay and they do NOT
>> work as expected:
>>
>> I used "Interpolating FIR filter" with taps equal to (0,)*delay+(1,)
>> and i didn't see any difference as i was changing the delay parameter
>> dynamically....
>>
>>
>> Achilleas
>>
>>
> The filtering still seems to work, but the delay (based on d_history)
> appears not to.
>
>
>>>
>>
>>
>
>
> --
> Marcus Leech
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortium
> http://www.sbrac.org
>
>



-- 
_______________________________________________________
Achilleas Anastasopoulos
Associate Professor
EECS Department               Voice : (734)615-4024
UNIVERSITY OF MICHIGAN        Fax   : (734)763-8041
Ann Arbor, MI 48109-2122      E-mail: address@hidden
URL: http://www.eecs.umich.edu/~anastas/
_______________________________________________________

test_delay.grc
Description: Binary data