Hi Nigel,
this sounds like you should rather be limiting the input item number of
your next block.
So do I get this right: We're looking at three blocks here:
A-->B-->C
What you want to do is limit the number of output items the scheduler
asks for at block B, right? Block A is the one where you
Hi Abhinav,
On 01/28/2016 04:32 AM, abhinav narain wrote:
> Hi Marcus,
>
> timing offset estimate) that your symbols have duration of
> 2.236472 samples and start with a sample offset of 114.060072; I
> don't see how knowing that would map the end of a preamble to any
> "exact" sa
Hey Rob,
thanks for trying PyBOMBS and sorry for the lack of an announcement on
usrp-users. I will announce it there once we release the next version
(which will be very soon) because I've fixed some issues and also made
UHD installation easier.
In your case, to install UHD, do the following:
1)
Hey everyone,
two more days 'til FOSDEM! I hope people are as excited as I am.
FOSDEM is this weekend in Brussels, and attendance is free.
Find our schedule here:
https://fosdem.org/2016/schedule/track/software_defined_radio/
Also, Tom Rondeau is giving a GNU Radio talk in a main track:
https://
Hello Guys
I am new to GNU Radio. I am sorry if the question is stupid.
Did anyone tried Successive Interference Cancellation using GNU Radio?
If so then is there any source code available related to that?
Awaiting for your reply
___
Discuss-gnuradio
Hi John,
Welcome!
> Did anyone tried Successive Interference Cancellation using GNU Radio?
Probably someone has; however, it's not really very universally
applicable. A lot of how you would implement something like that depends
on the parameters of your waveforms. You'll have to buffer at least
2
Thanks for all the replies.
Following Martin's suggestion, I added the appropriate line to config.yml.
After this my install command attempted the source install, but died with
the same problem that my gnuradio install died yesterday -- problem finding
boost components. I followed Derek's suggest
Martin,
One more thing... Now, when I run the command "pybombs update uhd", I get
the reply "PyBombs.RecipeListManager - ERROR - Package None has no recipe
file!".
Rob
On Thu, Jan 28, 2016 at 9:37 AM, Rob Kossler wrote:
> Thanks for all the replies.
>
> Following Martin's suggestion, I added t
Hi all,
I want to use one pc to control two USRP to send and receive ofdm
signals synchronization in the grc.One USRP is used as transmitter and the
other one is used as receive.Can it be done by just connect two usrp by
mimo cable?
Thanks in advance.
Best regards,
zs
__
I really thought this has become easier now. After my attempts using pybombs
and creating a whole mess in my system I decided to manually download and build
all from source, uhd, gnuradio, and all the other stuff, good a dozen of
gr-something packages. Then I made a simple script that git pulls
Yes. The MIMO cable forwards the data as if it was a network cable and a
switch.
Best regards,
Marcus
On 01/28/2016 04:18 PM, w xd wrote:
> Hi all,
> I want to use one pc to control two USRP to send and receive
> ofdm signals synchronization in the grc.One USRP is used as
> transmitter a
Hi:
Thanks so much.I want to realize the transmit and receive ofdm signal
in one pc.Also I want to realize the synchronization.Just combine the
tx_ofdm and rx_ofdm grc in one grc and just run?Any suggestion is
grateful.Thanks.
2016-01-28 23:44 GMT+08:00 Marcus Müller :
> Yes. The MIMO cabl
Yes you can do that. Also, most daughterboards you can use with the N2x0
are full-duplex capable, so you don't even need to use two USRPs.
On 01/28/2016 04:47 PM, w xd wrote:
> Hi:
> Thanks so much.I want to realize the transmit and receive ofdm
> signal in one pc.Also I want to realize the
Thanks so much.
1.Is sbx support the full-duplex?
2.If I use one pc and one usrp to realize the transmit and receive.Does the
frequency offset exist?
3.Have some related examples in grc which use one pc to control one usrp to
realize the transmit and receive?Have some related examples in grc which
Hi xd,
1. yes
2. yes, unless you have a common 10MHz reference connected to both.
That's what the MIMO cable is for.
3. the examples you're looking at.
On 01/28/2016 05:01 PM, w xd wrote:
> Thanks so much.
> 1.Is sbx support the full-duplex?
> 2.If I use one pc and one usrp to realize the transmi
Ah sorry ,I misread 2.
So, if you use only one USRP, then there's no frequency offset.
On 01/28/2016 05:02 PM, Marcus Müller wrote:
> Hi xd,
>
> 1. yes
> 2. yes, unless you have a common 10MHz reference connected to both.
> That's what the MIMO cable is for.
> 3. the examples you're looking at.
>
Thanks very much.
1. If I connect two usrps by the mimo cable.Do you mean the transmitter
and receiver also have the frequency offset if I don't use the 10MHz
reference?
2.Does the gnuradio have the related examples?
Thanks so much.Sorry for my poor english if you don't understand.Thanks so
muc
Hi all,
I'm building a new block by python to do sequential energy detector. In my
python block file, I want to divide my input into different part with same
length(number). And add the samples in each part.The python file is attached.
But when I use my block, it always print as follows:
p
Hi Yan,
pn = []
is an empty list.
pn[i] += d
tries to access an element of that list.
I'm not quite sure you should be creating a pn = [] in every for loop
iteration, neither.
This looks like a Python programming issue to me. It's probably a good
idea to practice a little bit on your python sk
Very cool. I'd be interested in looking into this further.
Am I correct in thinking that you didn't have the FPGA pass from QD to the
filters? That is to say, each block went into the FPGA, and back to the
computer?
- Tim
On Tue, Jan 26, 2016 at 2:08 PM, Alireza Khodamoradi <
ar.khodamor...@gmai
On Thu, Jan 28, 2016 at 10:03 AM, Rob Kossler wrote:
> Martin,
> One more thing... Now, when I run the command "pybombs update uhd", I get
> the reply "PyBombs.RecipeListManager - ERROR - Package None has no recipe
> file!".
>
This may be my fault from this commit:
https://github.com/gnuradio/p
Hi Tim,
We only put WBFM block into the FPGA. You can find more details in our
slides under "Bi-weekly Slides"
Best,
Alireza
On Thu, Jan 28, 2016 at 8:36 AM, Tim K wrote:
> Very cool. I'd be interested in looking into this further.
>
> Am I correct in thinking that you didn't have the FPGA pas
I have a fix for this I forgot to push. It checks for none when building the
dependency list. I'll push it in the next few minutes.
-- Seth
Sent from my iPhone
> On Jan 28, 2016, at 1:02 PM, West, Nathan wrote:
>
>> On Thu, Jan 28, 2016 at 10:03 AM, Rob Kossler wrote:
>> Martin,
>> One more
I have a USRP with a GPSDO. I am working on a block that will poll a USRP for
PPS changes in an attempt to adjust for clock offset between host and USRP.
Assume I have explicitly set the USRP time-of-day correctly to UTC using PPS
and a set_time_next_pps_call, and GPS is locked.
I would like to
Kartik,
As far as I am aware, hierarchical blocks cannot process messages. I ran
into the same issue, because I had a hierarchical block with several child
blocks, and it needed to do some control operations to the child blocks
dependent on a received message, without those blocks "understanding"
Hier blocks can connect to internal primitive blocks
They are removed during flattening and never receive a thread context to
handle messages in, creating a simple primitive received basic block to
handle messages like you have done is the right thing. If we do add hier
block message handling it w
Oops, forgot to include a link to the reference:
[1] https://lists.gnu.org/archive/html/discuss-gnuradio/2015-03/msg00388.html
From: discuss-gnuradio-bounces+sean.nowlan=gtri.gatech@gnu.org
[mailto:discuss-gnuradio-bounces+sean.nowlan=gtri.gatech@gnu.org] On Behalf
Of Nowlan, Sean
Sent:
Hi to all.
I want to test if the block Correlate and Sync improves my GFSK receiver,
so I started modifying ./gr-digital/examples/demod/test_corr_and_sync.grc .
1) I replaced the BPSK modulator (with rrc filter) by a Chunks to Symbols
[-1,+1] followed by a Interpolating FIR with gaussian taps.
2)
I am trying to optimize the current performance of gr-iee802-11. Ive done
some profiling and came to the conclusion that there is a lot of work being
put in decoding the convolutional code at the receiver.
I have done some research, and found out that there exists a viterbi
decoder that was develo
The dvbt project im talking about is:
https://github.com/gnuradio/gnuradio/tree/master/gr-dtv/lib/dvbt
And the gr-ieee-80211 project is:
https://github.com/bastibl/gr-ieee802-11
thanks in advance
2016-01-28 19:11 GMT-03:00 Gonzalo Arcos :
> I am trying to optimize the current performance of gr-
On Thu, Jan 28, 2016 at 11:04 PM, Francisco Albani <
francisco.alb...@gmail.com> wrote:
> Hi to all.
>
> I want to test if the block Correlate and Sync improves my GFSK receiver,
> so I started modifying ./gr-digital/examples/demod/test_corr_and_sync.grc .
>
> 1) I replaced the BPSK modulator (wit
On Thu, Jan 28, 2016 at 11:13 PM, Gonzalo Arcos
wrote:
> The dvbt project im talking about is:
> https://github.com/gnuradio/gnuradio/tree/master/gr-dtv/lib/dvbt
>
> And the gr-ieee-80211 project is:
> https://github.com/bastibl/gr-ieee802-11
>
> thanks in advance
>
We have a highly optimized V
Hello Tom,
Thank you for your answer.
I dont see how using the viterbi decoder from gr-fec would fix my problem.
I would still need the viterbi decoder to work on K=5 to be able to
integrate it with gr-ieee802-11, it is the same situation i am now with the
decoder i linked. My question is first i
On Fri, Jan 29, 2016 at 12:38 AM, Gonzalo Arcos
wrote:
> Hello Tom,
>
> Thank you for your answer.
>
> I dont see how using the viterbi decoder from gr-fec would fix my problem.
> I would still need the viterbi decoder to work on K=5 to be able to
> integrate it with gr-ieee802-11, it is the same
Thank you for your answer Tom.
I infer from your mail that changing the value of K might as well mean
building the decoder from scratch. Which leads to my next question, is
there any tutorials on how to program a viterbi decoder for an arbitrarily
value of K in an optimized way? does anyone know?
On Fri, Jan 29, 2016 at 12:52 AM, Gonzalo Arcos
wrote:
> Thank you for your answer Tom.
>
> I infer from your mail that changing the value of K might as well mean
> building the decoder from scratch. Which leads to my next question, is
> there any tutorials on how to program a viterbi decoder for
I'm looking for a GRC module like the scope except I need it to plot a
single network packet per update. Basically, the network packet has an
FFT result in it so I just need to plot each packet payload as they
arrive.
Please let me know if something like this already exists.
Thanks,
Clark
__
On 01/28/2016 08:11 PM, Tech wrote:
I'm looking for a GRC module like the scope except I need it to plot a
single network packet per update. Basically, the network packet has an
FFT result in it so I just need to plot each packet payload as they
arrive.
Please let me know if something like this
Hi all,
I just started to use GNU Radio for testing on USRP, and I want to make the
USRP receive signal periodically. So that for example, it will receive for
half a second, then rest for 10 seconds, during which it won't request
data from USRP.
I previously used GRC, but the usrp sink block do
Thanks guys.
On Tue, Jan 26, 2016 at 8:51 AM, Philip Balister
wrote:
> On 01/26/2016 05:17 PM, Tomaž Šolc wrote:
> > On 26. 01. 2016 12:14, Philip Balister wrote:
> >> On 01/26/2016 11:35 AM, John Malsbury wrote:
> >>> This was a surprising one. When set with a the same seed (regardless
> of
>
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