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Re: [Discuss-gnuradio] Which type of block do I use here?
From: |
Martin Braun |
Subject: |
Re: [Discuss-gnuradio] Which type of block do I use here? |
Date: |
Wed, 20 May 2015 09:04:33 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
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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