k would be 0.1 * 0.2 =
2 percent of CPU.
(How to know usage of python? Maybe, `top` command in POSIX)
Is what I think is correct?
Regards,
Jeon.
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go.
Anyway, 'one' I meant is, the total sum of percent runtime. That is one and
should be.
Regards,
Jeon.
2015-08-27 2:09 GMT+09:00 Marcus Müller :
> Hi Jeon,
>
> But I don't think that GNU Radio uses 100 percent (= one) of CPU
> capability.
>
> Well, t
ain relation to each other... since GNU Radio scheduler
allocates available memory over all blocks...? If so, can it be resolved if
I manually set a larger memory/buffer size to GNU Radio? (If my memory is
correct, I remember there's a configuration file to do i
n 240, 480, etc...,
so the `to_consume` will be zero according to my state machine.
After fixing the codes, I can get the same and correct behaviors and
results on both machines.
In short, it has nothing to do with spec. of a machine.
It's just all my fault.
Regards,
Jeon.
2015-08-29 2:34 G
uch lower limit, you can see warning
message on the console.
Regards,
Jeon.
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referring nitems_read() for add_item_tag().
2. add_item_tag() slides contain figures of input buffer and
get_items_in_*() slides contain figures of output buffer.
Since I've not attended GRCon15 and judge a presentation without any speech
nor context, I might just point wrong thing.
acd/t/55dc8a33e4b0ab4821199b21/1440516659004/5.+braun_martin-GR_from_Scratch+2015-08-24.pdf
Regards,
Jeon.
2015-09-03 15:06 GMT+09:00 Bala V. :
> I am getting lots of error in basic square block itself. so please give
> me a step by step procedure to add a new block.
>
> --
> Posted via http:
Dear Murray Thomson,
Which value did you set as a throttle.
Typically 48 kHz or something... But I asked this just in case.
Or this thread might help (
https://lists.gnu.org/archive/html/discuss-gnuradio/2013-08/msg00517.html )
Regards,
Jeon.
2015-09-03 23:22 GMT+09:00 Murray Thomson :
>
ng and SDR?
Another question comes that, the commercial off the shelf (COTS) Wi-Fi
device achieves really high throughput and that must be based on super
faster CC decoding. Is that because COTS is using heaviliy optimized FPGA
and dedicated decoding c
dio/gr-fec/examples/fecapi_cc_decodres.grc
I still don't know optimization.)
I will keep looking into those gr-fec, dtv, trellis modules.
If someone have suggestions, I will appreciate it.
Thanks a lot.
Regards,
Jeon.
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Thank you all of you who have answered to my questions.
I am sorry for anwering too late.
I'll try as many solutions as you suggested
and will let you know how I will have implemented it.
Regards,
Jeon.
2015-09-22 23:31 GMT+09:00 Jan Krämer :
> Hi all,
>
> my repo is here http
.
When we want to keep looking into it detail or to draw a plot with other
tools,
measurements in readable, editable formats are needed.
Or, it might be some functionalities to print values in stdout, which I can
redirect to somewhere.
And I couldn't find it or enable it...
Regards,
tands for universal PHY layer, well.
I think it is a sort of commercial framework built by CCTTC so there's
little information opened.
Anyway, are there someone who have used it, or heard about it?
And if you have, how do you evaluate it against GNU Radio?
Regards,
Jeon.
P.S. I am not go
ll general_work() be called
extremely frequently so that other blocks are prevented from being called?
Regards,
Jeon.
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Dear Marcus,
Thank you for quick and detailed answer.
I'll check that gr-eventstream as well as fundamentals of GNU Radio you've
described.
Regards,
Jeon.
2015-10-21 22:23 GMT+09:00 Marcus Müller :
> Hi Jeon,
>
> with gr-eventstream, there's something that alr
ginal ISO standards for HDLC
are ...
- Wikipedia https://en.wikipedia.org/wiki/High-Level_Data_Link_Control
Anyway, thanks again. I'll get that repo and see how it works. :)
Regards,
Jeon.
2015-10-22 5:43 GMT+09:00 Seth Hitefield :
> Jeon,
>
> I was talking with a co-worker an
original[offset:] with processed[:]
Stream Tags: https://gnuradio.org/doc/doxygen/page_stream_tags.html
Regards,
Jeon.
2015-10-26 23:26 GMT+09:00 Veljko Pejovic :
> Hi,
>
> I would like to process samples from a USRP (let's use FM
> demodulation, for example) and then identify whic
ed your GR module into a real machine.
Regards,
Jeon.
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In short, CC files are under git-cloned directory.
If you modify them, re-building and installing are required.
Regards,
Jeon.
2015-11-04 12:48 GMT+09:00 jenspen2 :
> Hello everybody,
>
> I'm new to Linux and GNU-Radio but I've searched the archives and faq but
> I canno
OS X El Capitan, I'd like to hear your
case.
*Problems of OOT modules are not my concern
Regards,
Jeon.
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2015. 12. 12. 오전 6:04에 "Michael Jay Klass" 님이 작성:
> please stop sending me any messages or posts
>
> ___
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> Discuss
good and I need to edit source
codes two times whenever change on enum OP_MODE happens.
Since these GIST codes are simplified version for brevity, if you need more
information please let me know about it.
Regards,
Jeon.
[1]: https://gist.github.com/gsongsong/3ce84f94da4d1cf6db5b6f2972d7d90
Dear Martin Braun
Thanks for response
enum OP_MODE is in utils.h [1]. And both working and non-working block
include utils.h.
Regards,
Jeon.
[1]:
https://gist.github.com/gsongsong/3ce84f94da4d1cf6db5b6f2972d7d90c#file-utils-h
2016-06-23 1:11 GMT+09:00 Martin Braun :
> Where is the e
Dear Tom,
Thanks for your response.
Actually, I had tried a similar approach, but that didn't work. (This may
because I have too little knowledge about swig.)
But this time, your advice helped me.
Regards,
Jeon.
2016-06-24 9:19 GMT+09:00 Tom Rondeau :
> On Thu, Jun 23, 2016 at 1:39
n build
all my own OOT blocks using message passing and unpack it into stream to
feed to USRP sink. But I think there are some reasons for not doing this.
Regards,
Jeon.
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s
from "hcitool clock" as fast as the system (GNU Radio) can.
Regards,
Jeon.
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n).
I'll post again if further progress.
Regards,
Jeon.
On Wed, Oct 12, 2016 at 9:36 PM, Marcus Müller
wrote:
> Hi Jeon,
>
> Your use case is not what you'd use controlport for; I think you've got it
> right: use modtool to create a sync block, but set its number o
be used.
Regards,
Jeon.
On Wed, Oct 12, 2016 at 9:36 PM, Marcus Müller
wrote:
> Hi Jeon,
>
> Your use case is not what you'd use controlport for; I think you've got it
> right: use modtool to create a sync block, but set its number of in- and
> outputs to zero; overr
fundamental
point.
Regards,
Jeon.
On Mon, Oct 17, 2016 at 11:16 PM, devin kelly wrote:
> Jeon,
>
> If you're just trying to get the results from 'hcitool clock', I'd look at
> the source code for hcitool and just copy that code. You'll probably have
> to add some
he first data ofdm symbol. If I miss something in interpreting the
code, please let me know it.
Regards,
Jeon.
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large bandwidth)
Regards,
Jeon.
On Wed, Dec 21, 2016 at 12:14 AM, Tom Golden
wrote:
> Hi All,
>
> I am connecting my flowgraph to a doppler prediction tool. My block
> currently modifies a variable that is used to specify the center frequency
> of the USRP Source block. The vari
defined symbol:
hci_read_clock
I wonder that the above error is C++ level error or Python level error. And
how can I fix it?
If infromation given in this post is not sufficient, please let me know it.
Regards,
Jeon.
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Dear Marcus Muller,
Your suggestion sovled my problem.
Thanks for your quick response.
Regards,
Jeon.
On Thu, Dec 22, 2016 at 1:00 AM, Marcus Müller
wrote:
> Hi Jeon,
>
> There's a "B" at the end of your "include_directories", but I guess that's
>
DM Carrier
Allocator block. Could anyone suggest a starting point to debug it?
OS is Ubuntu 14.04, kernel 3.13.0-96, 64-bit
GNU Radio version is v3.7.9.2
If more information is required, please let me know it.
Regards,
Jeon.
untitled.grc
Description: application/gn
Ah, never mind.
I declared occupied/pilot carriers and sync words incorrectly. For example,
it must not be ((-3, -1, 1, 3)) but must be (-3, -1, 1, 3),). I forgot
putting a comma.
Regards,
Jeon.
On Thu, Dec 22, 2016 at 5:14 PM, Jeon wrote:
> I made a simple flow graph using OFDM Carr
ve been already implemented?
Do I not understand how to use RS blocks which have been already
implemented?
Or should I implement them?
Regards,
Jeon.
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rrently, I am installing the newer version.
Reagrds,
Jeon.
2015-03-10 23:10 GMT+09:00 Tom Rondeau :
> On Tue, Mar 10, 2015 at 3:35 AM, Ron Economos wrote:
>
>> Take a look in:
>>
>> gnuradio/gr-dtv/lib/atsc/atsc_rs_encoder_impl.cc
>> gnuradio/gr-dtv/lib/atsc/atsc_rs_
see a list of wireless applications with some googling. (I'm not sure
they are standards or just proposal)
Regards,
Jeon.
2015-03-11 14:42 GMT+09:00 Bogdan Diaconescu :
> HI Jeon, you might try the RS encoder/decoder in my gr-dvbt
> implementation. There are grc blocks that you can us
pure convolutional encoder and decoder?
Or are they specially designed for DVB-T?
Regards,
Jeon.
2015-03-11 14:42 GMT+09:00 Bogdan Diaconescu :
> HI Jeon, you might try the RS encoder/decoder in my gr-dvbt
> implementation. There are grc blocks that you can use directly after
> inst
-dvbt', but I have no idea to do it.
Does anyone have an idea for my problem?
Regards,
Jeon.
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Thanks, TOm.
Answer to my question.
gr::dvbt::reed_solomon d_rs(...) works.
No CMakeLists modification and other stuffs are needed.
Regards,
Jeon.
2015-03-20 22:36 GMT+09:00 Tom Rondeau :
> On Fri, Mar 20, 2015 at 4:07 AM, Jeon wrote:
>
>> In my out-of-tree module (in develop)
I'm looking for old BBN 802.11 codes.
But, links in gnuradio.org (
http://gnuradio.org/redmine/projects/gnuradio/wiki/BBN_Technologies_Internetwork_Research_ADROIT_Project)
may not seem to work.
Does anyone know where I can get the codes, or does anyone have the back
ups?
Regrads,
sense?
Or is it recommended to write a cpp code that selects one of Manchester and
4B6B?
Regards,
Jeon.
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definitions missing, I
apologize for that.
And please note that each in[i] is either 0b or 0b0001.
By using a tag, RLL coding scheme are not changing during the stream.
Currently, I haven't built it and tested yet.
What do you think of it?
I will make some notes after build and test
;> import myOOTmodule
ImportError: /usr/local/lib/libgnuradio-myOOTmodule.so: undefined
symbol: _ZN2gr4dvbt12reed_solomonC1E
Am I guessing wrong? Or, gr-dvbt are not available to be used by other OOT
modules?
Can it be solved by modifying 1) my code or 2)
f any.
Regards,
Jeon.
2015-03-27 16:30 GMT+09:00 Marcus Müller :
> Hi Jeon,
>
> could you paste the whole C++ file to the gist?
> Basically, what I suspect is that you're not checking whether
> get_tags_in_range() produced a tag at all, or/and might have an error in
> yo
Dear, Marcus
Thank you for your advice.
I will test it as soon as possible after fixing another problem in the
entire module (not related with RLL.)
And will report the result on the discuss-gnuradio.
Regards,
Jeon.
2015-03-28 21:50 GMT+09:00 Marcus Müller :
> Hi Jeon,
>
> this l
lf. But there is no declaration and implementation and it
causes the error.
Or myOOTmodule has no idea where to import gr:dvbt:reed_solomon.
Another hypothesis is that, an OOT module cannot use other OOT modules (in
swig-python?). I'm not sure about it
ully it yet and it's been two years since that
thread was posted, I think it might be relevant with my case.
If you have any better suggestions, I will be very thankful to it.
Also, I will report my progress as soon as possible.
Regards,
Jeon.
2015-03-31 0:22 GMT+09:00 Anderson, Douglas J. :
and searching, I found that gr-dvbt is not present in
'pkg-config --list-all'.
I think it would be a bit relevant to this problem.
If it is the case, I'd better think to use IT++ Reed Solomon.
I'll let you know if I have further progress.
Regards,
Jeon.
2015-03-31 18:32 G
r, _swigregister
things? But, I wonder if it is a good way to modify other's sources. On the
contrary, it might be good if I can contribute to the gr-dvbt sources.
Or is it irrelevant with my problem?
Anyway, I'll try what I am thinking til some respones recevied.
Regards,
Jeon.
20
analog, gr::digital, gr::blocks...)
for malloc?
Or, is it not just a simple memory allocated array,
but a special array that something happens when items are put into the
array?
Regards,
Jeon.
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Marcus,
Thank you for your detailed explanation.
Now, I can see that I can use an ordinary malloc if there is no specially
aligned memory.
Thanks.
2015-04-23 17:53 GMT+09:00 Marcus Müller :
> Hi Jeon,
>
> you just `malloc(...)` when you need to; why would you, in general, need
>
ady implemented unipolar preamble detection
succesffully, or could anyone give me some hints on mathematical approach
or something?
Regards,
Jeon.
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, I will do applying either LPF and MA on my flow graph. Thanks.
Regards,
Jeon.
2015-05-05 16:27 GMT+09:00 Sylvain Munaut <246...@gmail.com>:
> Hi,
>
> > (Bipolar: a signal swings between +A volts (or amperes) and -A volts;
> > Ethernet, USB, Wi-Fi, ... are using bipolar
, the scope shows:
..1..1..1...0..0..0...1..1..1...0..0..0...1..1..1.. (n ones and m zeros are
repeating, n, m < 10)
I think this issue related with some graphic interface. Is it a know issue?
Regards,
Jeon.
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Disc
g and several ones after zooming have same
duration.
For additional information,
I am using GRC 3.7.6 on Ubuntu 14.04 (kernel 3.13) on VMWare assigned 2
CPUs (i7 3770) and 4 GB ram.
Regards,
Jeon.
2015-05-08 21:09 GMT+09:00 Marcus Müller :
> Hi Jeon,
>
> is this QT or WX Gui?
>
>
Dear, Marcus
That's OK. It's not a problem related with actual communication behavior or
something.
I was just curious about that :)
Regards,
Jeon.
2015-05-08 21:49 GMT+09:00 Marcus Müller :
> Hi Jeon,
> sorry, I really can't reproduce that. Can you provide a minimal fl
) == 0)` in `case RESET`
I am wonder what do these numbers(128, 80, 15, 64) and modulo operation
have logical meaning in IEEE 802.11p PHY frame?
I've read 802.11 OFDM specification, thus I have knowledge about it,
but I have no idea what are roles of these things in implemen
Dear Marcus and Bastian,
Thank you for your detailed answers.
Also, thank you for useful usage of gist. :)
Regards,
Jeon.
2015-05-09 21:42 GMT+09:00 Bastian Bloessl :
> Hi,
>
>
> > On 09 May 2015, at 13:23, Marcus Müller
> wrote:
> >
> > So, looking at this,
)
Regards,
Jeon.
2015-05-09 22:32 GMT+09:00 Jeon :
> Dear Marcus and Bastian,
>
> Thank you for your detailed answers.
>
> Also, thank you for useful usage of gist. :)
>
> Regards,
> Jeon.
>
>
> 2015-05-09 21:42 GMT+09:00 Bastian Bloessl :
>
>> Hi,
&
` and `o`/`noutput_items`,
where `i` and `o` are input and output indices. When `ninput_itmes` and
`noutput_items` change, it means a new `general_work` is called.
Log (it's quite long...): https://bitbucket.org/snippets/gsongsong/By8x
Reg
think I can combine `produce()` and `set_min_noutput_items()` to
**enlarge** the `noutput_items`
If I get wrong, please let me know.
Regards,
Jeon.
2015년 5월 29일 (금) 오후 8:47, Jeon 님이 작성:
> I am trying to remove `preamble` and `start frame delimiter` from a frame
> and only the payload will b
age, I am using fixed length payload. But, I want to
make it work with arbitrary length (but not too long).
Regards,
Jeon.
On Fri, May 29, 2015 at 9:52 PM Marcus Müller
wrote:
> Hi Jeon,
>
>
>
> On 05/29/2015 01:46 PM, Jeon wrote:
>
> I am trying to remove `preamble` and
Thanks to Sylvain and Marcus.
I think I've solved problem.
Regards,
Jeon.
2015-05-30 11:26 GMT+09:00 Sylvain Munaut <246...@gmail.com>:
> Hi,
>
> > As I understand, if I consume(0, n), where n is less than ninput_items,
> then
> > only n samples at the front o
Hi Agam
I have no idea about details on PSK mod/demod blocks, BUT... one simple
thing...
Did you check the output right after the `PSK demod`, `Packed to Unpacked`,
`Packet Decoder`?
Bytes can be plotted after converted to float with `char to float`
Regards,
Jeon.
2015-06-01 19:01 GMT+09:00
thing`.
Regards,
Jeon.
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tion is to modify source code of GRC
app itself. I'll try it later.
Again thank you for your kind answers
Regards,
Jeon.
2015-06-09 16:13 GMT+09:00 Marcus Müller :
> Hi Jeon,
>
> the input fields just take "normal" python, so
>
> "/my/file/path"+ str(time)
ways?
Regards,
Jeon.
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Dear Tom and Marcus
Thank you for very detailed explanations.
Regards,
Jeon.
2015-06-12 22:24 GMT+09:00 Tom Rondeau :
> On Fri, Jun 12, 2015 at 2:24 AM, Marcus Müller
> wrote:
>
>> Have a look at the performance counters, and especially the graphical
>> monitor, gr-p
a byte individually, use unpack_k_bits
with k = 8.
Regards,
Jeon.
2015-06-17 11:49 GMT+09:00 Marbellys :
> Thank you.
>
>
>
> --
> View this message in context:
> http://gnuradio.4.n7.nabble.com/variable-type-while-creating-a-block-tp54226p54232.html
> Sent from the GnuRa
Dear Anil,
Not every 64 items,but work() function is called if there are more than 64
items in the input stream (buffer).
Regards,
Jeon.
2015-06-19 11:51 GMT+09:00 Anil Kumar Yerrapragada :
> Hi,
>
> A quick question on tags.
>
> I'm coding a custom block in python and my
Devices Found
Could you suggest anything else what I haven't done yet?
I use Cat 5 ethernet cable to connect USRP and PC (not sure it is 5e, I'll
check it.)
Regards,
Jeon.
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Thanks Marcus :)
2015-06-25 16:42 GMT+09:00 Marcus Müller :
> Hi Jeon,
>
> In my case, my OOT module use IT++ (for convolutional code) and
> [ezpwd-reed-solomon](https://github.com/pjkundert/ezpwd-reed-solomon)
> Isn't it the case that I can port it easily?
>
> Sin
it there later. :)
Regards,
Jeon.
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e.
Nathan,
LFTX and LFRX can use center frequnecy of 0 Hz (maybe) which are what I
am using now.
Regards,
Jeon.
2015-06-25 22:58 GMT+09:00 West, Nathan :
> Hi Jeon,
>
> I stared at this over my morning coffee. I can't quite explain why you're
> getting 7.8kHz output on
If those overshoots are unwanted but inevitable due to hardware
characteristics and limitations,
you can generate a wave form with vector source with input sequence
101001111...
Then, the output will be HLHLLHHHH... (H = HIGH, LOW = LOW)
Regards,
Jeon.
2015-06-29 23:23 GMT+09:00
.
Regards,
Jeon.
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ight be wrong. There can be a block can do what you want, but not sure
about it.)
I recommend you to build a pass-or-drop, pass-or-block block.
Regard,
Jeon.
2015-07-01 11:59 GMT+09:00 Antonny Caesar :
> Marcus, I see what you mean, but you didn't understand what I wanna do.
> Using a
Dear Tim and Marcus,
Thank you very much.
I'll take a look at those projects.
Regards,
Jeon.
2015-07-01 0:03 GMT+09:00 Tim :
> Jeon,
> Also check out
> http://wp.me/p55sJw-2v
> software based half duplex burst PSK modem which can operate using a
> single USRP, file lo
. I make a thread in discuss-gnuradio since I've got no reply on
USRP-users several days or weeks ago (I don't remember exactly...).
Regards,
Jeon.
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Dear Marcus.
Thank you for your answer.
Yes, I mean daughterboards, not USRP. I made an expression too short :)
And I am happy to hear that I don't need to worry about what I've been
concerning.
Regards,
Jeon.
2015-07-03 0:27 GMT+09:00 Marcus Müller :
> Hi Jeon,
>
> What
whileni didnt look into null source block code,
but the basic behavior of null source block is,
it outputs nothing.
So stream mux waits until input blocks pass a given number of samples and
it takes forever
Regards
Jeon
2015. 7. 9. 오전 11:27에 "Nowlan, Sean" 님이 작성:
> I’m some
Oh I didnt know it.
Thanks for correcting it
Regards
Jeon
2015. 7. 9. 오전 11:51에 "Nowlan, Sean" 님이 작성:
> Null source just sets all outputs to zero, so it’s equivalent to a
> constant source with the scalar=0.
>
>
>
> …
>
> for(size_t n = 0; n < input_
a clock rate of USRP (15 MHz) is a
multiple of every given clock rates (200k, 400 kHz, ...) and because it's
not a sinusoid, but a simple on-off keying.
So, how do you think of it? Are there something that I am missing in a real
implementation?
Regards,
Jeon.
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try both of them with various parameters, see the
results/differences and post something if I make some progress.
Regards,
Jeon.
2015-07-24 23:00 GMT+09:00 Marcus Müller :
> Hi Jeon,
> what USRP are you using?
>
> You're right: The point is that only integer factor of the U
h pass filter? Or is it just ok to
use high pass filter block in GNU Radio. I think the former is better to
reduce the computational cost of GNU Radio. And it is more proper to filter
out before it passes through the ADC...
Regards,
Jeon.
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Discuss-g
50 ohms) and so...
It's just curiosity. I'm not going to use such things right now.
So if it is hard to tell in short time, YES or NO is sufficient. or you can
just ignore this question.
Thanks again.
Regards,
Jeon.
2015-07-30 23:40 GMT+09:00 :
> Jeon:
>
> Gnu Radio, per se, knows
d5cea6e4(
https://gnuradio.org/redmine/projects/gnuradio/repository/revisions/d5cea6e44e29db6b62fabe2b1e5ec16e91b41e68)`
in Jun 22 2015. I can't remember exactly, but I think this commit was used
to install the GNU Radio.
Regards,
Jeon.
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ergen
You can get one in http://conferences.sigcomm.org/sigcomm/2013/srif.php
It does not fully describe how it can be used, though, through this you can
get a hint.
Regards,
Jeon.
2015-08-04 16:36 GMT+09:00 bob wole :
> Ubuntu 14.04 64-bit
>
> I just installed frest gnuradio 3.7.8rc
,
Run commands:
./bootstrap
./configure
make
[sudo] make install
[sudo] ldconfig
(Assuming you have the proper version of GNU Radio, gr-ieee802_15_4)
Regards,
Jeon.
2015-08-05 0:27 GMT+09:00 Jaeho :
> i am sorry, i have more question about your advice.
>
&g
.
Regards,
Jeon.
2015-08-05 9:15 GMT+09:00 Jaeho :
> Thank you for your advice.
>
> but i think, your advice is for about old version gr-ieee802_15_4 which
> name
> was UCLA Zigbee PHY.
>
> it supported only until gnuradio version 3.5, and i am now using gnuradio
> ve
messing around my PC.
If you have a system with some fresh installation and configuration, it
won't be a problem.
Regards,
Jeon.
2015-08-04 0:05 GMT+09:00 Tom Rondeau :
> On Sat, Aug 1, 2015 at 1:41 AM, Volker Schroer wrote:
>
>> The same error happens in the 3.7.8 release candida
a what it means.
Can anyone give me a tiny hint of it?
Regards
Jeon.
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to be
monitored.
Is what I guess is correct?
If so, this might be a problem when I want to monitor a certain block
which has an optional output signature so that it is recognized as a sink
block.
Is there a way to monitor a such block?
Regards,
Jeon.
2015-08-06 19:31 GMT+09:00 Jeon :
> I
.
Is it also applied to GNU Radio?
Regards,
Jeon.
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Please
Is there anyone who could tell me what do those subdev_spec index stans for in
thefollowing statement?:
subdev_spec = (0, 1)
I did some googling and there are lots of examples about it
But i couldnt find the meanings of those indexes
Thank you
Sent from my iPad
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