Hi Colby,
So it means that it if one input comes at 20 samples/sec then it limits the
output rate of my custom block to exactly 20 samples/sec? That is, the other
input, gr_noise_source can provide samples at a rate faster than 20 samples/sec
to the custom block input but the custom block produces output only when both
inputs are available. Am I right?
I am sorry for not being clear about the other part of question. The question
is that if I further multiply the output of the custom block (which has a
sample rate of 20 samples/sec) with another signal of sampling rate 2M
samples/sec then what will be the sampling rate of the product signal? If it
will be 2M samples/sec then will the custom block output sampled at 2M
samples/sec have 1 non-zero sample followed by 100,000-1 zeros or will the
custom block hold its output value to repeat it 100,000 times until the next
sample arrives after 50mS?
Thanks a lot,
H.
Hi Henry,
GNU Radio, as far as I understand, does not have a concept of time. It will try
to process samples as quickly as they are available. If your input sample is
arriving every 50mS then a sample should be produced by your block shortly
after the 50mS arrival mark.
What do you mean, the output value should stay there? The output value is
shipped off to some other block that connects to yours.
--Colby
On Tue, Jun 14, 2011 at 10:35 PM, Henry Matt <[email protected]> wrote:
Hi,
>
>
>I have made a custom block derived from gr_block which has two inputs. First
>input comes at a sampling rate of 20 samples/sec while the other input comes
>from the gr_noise_source block. Now, my question is: what will be the sampling
>rate at my custom block output? Is it also 20 samples/sec? If not then how can
>I make it 20 samples/sec. Also, my custom block needs to operate on sample by
>sample basis not on chunks of noutput_items. In other words, the custom block
>should produce an output sample after every 50mS (and not before) when both
>inputs arrive and that output value then should stay there for another 50mS
>until next input samples for two inputs arrive and new output is computed.
>
>
>Thanks in anticipation,
>H.
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