Tx_ofdm.grc start_of_burst end_of_burst

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?
Thank you very much.
Best regards,
xd

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

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

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

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

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

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 M.” [email protected] 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 B.” [email protected] 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


Discuss-gnuradio mailing list
[email protected]://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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

M

Hi Xianda,
as Martin said:

So, the OFDM code does not add EOB

Greetings,
Marcus