Re: [Discuss-gnuradio] Need help to understand code of sync:decimator block

[kunal sankhe]

Hello Marcus,

Sorry for my vague explanation. I want to write a block which will calculate moving average for a block of samples. I have only one input in this case. I am providing my data serially using vector to stream converter. I want to calculate average of a block of 5 samples.

eg. from vector source {1,2,3,4,5,6,7,8,9,10}, i will get stream of integers.

Now I want to calculate average for first 5 samples i.e. 3 and then it should calculate average of {6,7,8,9,10} which is 8. So i should get desired output as {3,8}.

So I should get output for a block containing 5 samples. It should again consider block of 5 next samples and calculate average.

Please let me what changes do I need to make.

Thanks,

Kunal   

On Sat, Mar 8, 2014 at 3:23 PM, Marcus Müller <address@hidden> wrote:

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Hello Kunal,

You don't want to use set_history in this case:  you want to produce 1 output for 5 input, so you use a decimator; that's all you need to do. Drop the set_history.
For reference: history is when for every input item you need the last 5 items before, http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules#set_history
Greetings,
Marcus
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