Re: [Discuss-gnuradio] tx_ofdm.grc start_of_burst end_of_burst

[Marcus Müller]

Sorry Xianda,
I'm still not understanding completely.
Is this question about a) tx_ofdm.grc, or b) not about GNU Radio?

Best regards,
Marcus

On 30.07.2014 17:51, xianda wrote:
>
> Hi Marcus:
>                 Thank you so much.I just want to make some changes on the 
> example of tx_ofdm.grc.And I use the UHD not the gnuradio.But the example is 
> about the gnuradio.I know a packet in the example tx_ofdm.grc include a 
> preamble,a header,the payload and crc value.And I want to know whether need I 
> add start_of_burst at the beginning of every packet and add end_of_burst at 
> the end of every packet?Am I right?
> Best regards,
> xd
>
>
>
>
>
> At 2014-07-30 11:39:02, "Marcus Müller" <address@hidden> wrote:
> Hi Xianda,
> if you don't use gnuradio, this might not be the right list for you...
> Anyway, I think it's possible you're confusing something. start_of_burst / 
> end_of burst are stream tags that are GNU Radio concepts. There is not 
> something like this without GNU Radio.
> UHD supports timed commands, which might be close to what you need, but I 
> really don't understand what your question aims at.
>
> Greetings,
> Marcus
>
>
> On 30.07.2014 16:50, xianda wrote:
>
> Hi:
>     Thank you so much for your kindly reply.I write c++ code use the uhd not 
> gnuradio.So need I add start_of_burst at the beginning of every packet and 
> add end_of_burst at the end of every packet?Thank you.
> Best regards,
> xd
>
>
>
>
>
>
> At 2014-07-30 10:05:47, "Martin Braun" <address@hidden> wrote:
>
> On 07/30/2014 03:59 AM, xianda wrote:
>
> Hi all:
>          I know a packet in the example tx_ofdm.grc include a preamble,a
> header,the payload and crc value.Recently I have used the UHD API to
> send packet.And I want to know whether the tx_ofdm.grc add
> start_of_burst and end_of_burst automatically.Namely,need I add
> start_of_burst at the beginning of every packet and add end_of_burst at
> the end of every packet?
>
> usrp_sink understands tagged streams. So, the OFDM code does *not* add
> EOB, but that doesn't matter if you have an up-to-date gr-uhd.
>
> M
>
>
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