Re: [Discuss-gnuradio] Which type of block do I use here?

[Martin Braun]

If our squelch blocks don't suffice, and you *do* need to implement your
own, you'd use a general gr::block.

M

On 20.05.2015 01:02, Su Li wrote:
> Hi,
> 
> It seems that you may need a Power Squelch filter, which can be found in
> Level Controllers category in GNR Radio Companion.
> 
> Best,
> 
> Su Li
> 
> 2015-05-20 7:37 GMT+02:00 Anil Kumar Yerrapragada
> <address@hidden <mailto:address@hidden>>:
> 
>     Hi
> 
>     Say I want to create an energy detect block that takes a certain number
>     of input samples, measures the (signal) power and compares it against a
>     threshold. Only if the power exceeds the threshold, the block has to
>     make the decision that some genuine signal is being received and then
>     move only those samples to the next block for further processing.
> 
>     So if power > threshold, send all the samples as is to the next block.
>     In this case the block behaves as a sync block.
> 
>     But if power < threshold, the block has to flush the data and wait for
>     the next set of samples. (I'm not sure what type of block fits the bill
>     here)
> 
> 
>     Either way, i wanted to know how to get the same block to behave in two
>     different ways in terms of the number of items that it outputs.
> 
> 
>     Thanks for your help
>     Anil
> 
> 
> 
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