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

[Martin Braun]

But you don't *need* it, either. So, don't add EOB if you're using a
current GNU Radio.

M

On 07/30/2014 06:24 PM, Marcus Müller wrote:
> Hi Xianda,
> as Martin said:
>> So, the OFDM code does *not* add EOB
> 
> Greetings,
> Marcus
> 
> On 30.07.2014 18:06, xianda wrote:
>>
>> Hi Marcus:
>>                 Thank you.I just want to know whether the example 
>> tx_ofdm.grc add start_of_burst at the beginning of every packet and add 
>> end_of_burst at the end of every packet?
>> Best regards,
>> xd
>>
>>
>>
>>
>>
>>
>> At 2014-07-31 00:03:33, "Marcus Müller" <address@hidden> wrote:
>>> 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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>>>>
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> 
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