Hello,
I am usin OFDM Modulation and demodulation along with PCCC encoder and
PCCC decoder.. I am using QPSK modulation in OFDM. But Pccc decoder combo
also using Demodulation parameter Constellation and Dimension. is it mean
that demodulating twice? how can I use OFDM Block with PCCC decoder?
Thank you Marcus.
I saw my mistakes, now both blocks are finally working fine! Thank you for
all your help. And thank to all that helped me.
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Hey Doug,
This particular part of the flowgraph deals with reception of a 2
antenna transmitter. That implies that an Alamouti code is applied
before transmission. Thus, for correct reception, it is necessary to
perform the inverse Alamouti code operation. This is generally called
Precoding. For
Marcus,
I'll send information only if no one else is sending. So, 0/1 will just
tell me when I can send my data (0 = I can't; 1 = I can).
Zero means another person is using the spectrum, so my data will be
lost, because that's not my band, I'm just using it for a short period
of time.
One
Marcus,
Letter c.
Thank you.
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I'd hate to be 'that guy', but this thread is getting a little ridiculous
at this point (actually it started out a bit silly with a request for a
flowgraph to generate some random FSK signal from a picture). Antonny, it's
pretty common when learning new software or tools that you can't
immediately
Daniele,
I just want a kind of random multiplyer. It's necessary to lose the
signal when I can't send it. I still don't have details about my
purposes after that, but it's not necessary. I just want pass or not my
sine wave to the output without changing it like Rafael did above.
Thank you.
Cool! Now I know what kind of system we're talking about.
The problem is now:
If you just lay after chunk of signal that passes through your tap one
after another, you'll end up with *exactly* the signal you fed into the
tap, only sliced:
http://imgur.com/aa4ZjR2
Now, what GNU Radio does is
Marcus,
I made the drawing; it's attached. I want the entire signal or nothing
in the output.
It's the same of multiplying my signal by 0 or 1. The problem is: these
factors (0 and 1) have to appear in a random way. I can't predict it,
that is, I don't know when the output is nothing or the
Hi,
sadly, I still don't understand:
your control won't be 0 or 1 forever. What do you do with the signal
that comes in while it's 0? Will it be forgotten? Will it be saved for
the time when control is 1 again?
Hence, I'll just repeat my question, could you please say a, b, c
or none of these?
On 02/07/15 15:05, Antonny Caesar wrote:
I'll send information only if no one else is sending. So, 0/1 will just
tell me when I can send my data (0 = I can't; 1 = I can).
Zero means another person is using the spectrum, so my data will be
lost, because that's not my band, I'm just using it
Could you really please answer my question, a,b,c or none of these?
On 07/02/2015 03:05 PM, Antonny Caesar wrote:
Marcus,
I'll send information only if no one else is sending. So, 0/1 will just
tell me when I can send my data (0 = I can't; 1 = I can).
Zero means another person is using
Hi Jeon,
What I concern is, USRP can process bipolar signal, has a low noise
amplifier (LNA) and an ADC at the receiving end.
That's not true. The USRP motherboard itself doesn't have an amplifier;
amplifiers are, if they exist, on the daughterboards.
The LFRX doesn't have an LNA -- it just has
I am using LFTX and LFRX to transmit and receive data between two nodes.
I am modulating a bit stream with on-off keying (OOK) in which bit 1 is
modulated into HIGH voltage and bit 0 is modulated into LOW voltage close
to zero.
What I concern is, USRP can process bipolar signal, has a low noise
On 07/01/2015 10:19 AM, Piotr Krysik wrote:
Hi all,
UHD host library generates prints on the stdout. For example on each
retune I get something like:
-- Tune Request: 959.00 MHz
-- The RF LO does not support the requested frequency:
-- Requested LO Frequency: 959.00 MHz
--
On Tue, Jun 30, 2015 at 2:00 PM, bob wole bnw...@gmail.com wrote:
On Tue, Jun 16, 2015 at 11:45 PM, bob wole bnw...@gmail.com wrote:
On Tue, Jun 16, 2015 at 11:41 PM, Tom Rondeau t...@trondeau.com wrote:
On Tue, Jun 16, 2015 at 1:03 PM, bob wole bnw...@gmail.com wrote:
On 16.06.2015
Hi Jeon,
is this the mail you were referring to on discuss-gnuradio? I'm
including it in my reply, because that seems sensible.
What you're looking at looks very much like a synchronization problem.
Manchester tells me we have a reliable rate of transitions, so that's
handy :)
I'd go for
I am slowly getting to know the 'pybombs' handling I think, lot of guessing and
trail and error. I have started to troubleshoot each problem in order, first
one is failing install of 'cmake', I have tested a number of versions but each
have same problem in PCLinuxOS KDE64. Build fails at
Hi all,
I'm new to GNURadio and I'm trying to use a USRP E310 to capture GSM signals
from a cellphone and store the RSSI values in a text file. If you take a look
at my flow graph I've managed to capture the average strength across the 200kHz
GSM band and I'm trying to filter out the unwanted
On 07/02/2015 11:07 AM, Varun Nambiar wrote:
Hi all,
I'm new to GNURadio and I'm trying to use a USRP E310 to capture GSM signals
from a cellphone and store the RSSI values in a text file. If you take a look
at my flow graph I've managed to capture the average strength across the
Hi
I am using GNU Radio 3.6.4.2 on Ubuntu 12.04. I am unable to use the TCP
Source and Sink blocks which I want to connect to hardware. Whenever I
use them, I get the following error:
File /home/vlab/Documents/top_block.py, line 13, in module
from grc_gnuradio import blks2 as grc_blks2
I'm hoping to access the built-in method to avoid something like that, because
the code I'm modifying makes counting it myself tricky.
Rich
Sent from my iPad
On Jul 2, 2015, at 10:31 PM, Jawad Seddar jawad.sed...@gmail.com wrote:
Maybe something like this?
for(int
Maybe something like this?
for(int i=0;inoutput_items;i++){
current_item = nitems_read() + i;
}
Le 3 juil. 2015 12:17 AM, Richard Bell richard.be...@gmail.com a écrit :
Is there a way to access the counter used to give tag offsets for debug
purposes without using tags? I'd like to be able to
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 marcus.muel...@ettus.com:
Hi Jeon,
On 07/02/2015 11:25 AM, Varun Nambiar wrote:
Hi Philip,
At the moment of execution a file size of 32KB with just 0s is written to my
file and then it doesn't add anymore values after that. I am on release-2 and
I've attached my GRC file.
I dropped the throttle block and saw the output
Mike,
After spending the better part of 8 hrs doing the whole migration
procedure, as specified at the link you provided, I'm pretty much
worse off than before. The restore script failed when building a
component (this time TCL instead of swig) with the same error.
fatal error: 'iosfwd' file
Hi Ed - Sorry to hear of your troubles migrating / upgrading MacPorts.
Yes, it can be a real pain. If you stick with default variants, then
most of the ports will be downloaded as pre-compiled binary. If you just
use MacPorts for GNU Radio related ports, then the easier way is to:
1) wipe all MP
Thanks Johannes,
At some point I'd like to pick up a B210 and try out the MIMO flowgraph, but
for now I'm stuck with an N210.
So what I've got now is going straight from the LTE OFDM hier block into Decode
PBCH hier block.
I've run into just a couple snags in the PBCH hier block.
First one
Hi all,
Here's the GRC file. Any help would be appreciated!
Thank you,
Varun
From: Philip Balister phi...@balister.org
Sent: Thursday, July 2, 2015 1:35 PM
To: Varun Nambiar; GNURadio Discussion List
Subject: Re: [Discuss-gnuradio] Writing RSSI Values to
On 07/02/2015 03:26 PM, Varun Nambiar wrote:
Hi all,
Here's the GRC file. Any help would be appreciated!
Thank you,
Varun
Could you clarify whether you want RSSI estimates over the whole input
bandwidth, or for each discrete frequency bin?
This graph shows confusion in a number of areas,
Hey Marcus,
I'm getting the FFT over a 1 MHz bandwidth and I'm computing the average signal
strength over a 125 kHz region of that 1 MHz region by integrating all the
samples and dividing by the number of samples. I'm hoping to get an RSSI
estimate over the input bandwidth. My issue is that I
On 07/02/2015 05:51 PM, Varun Nambiar wrote:
Hey Marcus,
I'm getting the FFT over a 1 MHz bandwidth and I'm computing the
average signal strength over a 125 kHz region of that 1 MHz region by
integrating all the samples and dividing by the number of samples. I'm
hoping to get an RSSI
Is there a way to access the counter used to give tag offsets for debug
purposes without using tags? I'd like to be able to print item number when
I'm not using tags.
Rich
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