You are not seeing harmonics. You are seeing DC offset, which you have
not corrected for. Also, you seem to be transmitting a very low power
which results in your signal being below the DC offset level.
Matt
Quoc Lai wrote:
Hello,
I am a beginner with USRP. Please help with my problem
I'm using an older version of GNU Radio. I don't have the exact version
number right now, but it's 2.x something. I'm using Ubuntu Linux 32-bit
on a Core Duo Dell laptop. I don't know the name of the USRP daughter
board I'm using, but it receives in the ~1GHz range that I'm working
with and
On Fri, Mar 6, 2009 at 10:29 AM, Stefan Brüns
wrote:
> So d_phase gets incremented by d_freq on every incoming sample, and once every
> symbol.
>
> Any comments, is this actually a bug?
Yes. Your fix was applied to the trunk today as r10702.
Thanks!
Johnathan
___
Thanks
Oh yes the "-m" specifies the mod and demod. But the modulation seems
related to some other parameters, which I can't see with the "-h" option. We
can change the rate by --bitrate, but how about transmit power, and receiver
acquisition loop?
BTW, does anybody have the correct parameters
Hi everyone,
I am trying to implement a transmitter receiver handshake in which the
transmitter first sends a 'Ready to send' and the receiver upon receiving it
sends a 'Clear to send' back. After this the TX is supposed to send data and
RX is supposed to receive it which they are not being able t
Hi,
>From :
http://gnuradio.org/trac/wiki/ReportingErrors
Some GNU-Radio-specific things that we'll need to know are:
* What version of GNU Radio are you using?
* What operating system are you using? (Linux, BSD, Mac OS X, Windows, or
other? Which distribution? Which version? 32- or
adib_sairi wrote:
Eric Blossom wrote:
There is no documentation of that type for OFDM.
Eric
if i want to reconfigure the modulation for each sub-carrier (bit loading
for OFDM), can i just edit the ofdm benchmark python file? or i have to go
in detail until the IFFT and FFT? the OFD
yyzhuang wrote:
Hi,
I'm pretty new in working with gnuradio. Could you please tell me a bit of
detail about how to change the symbol rate, transmit power, and receiver
acquisition loop (command line? the script code?) Thanks a ton!!
Yanyan
We use OptionParser for all of our command-line a
Tom Rondeau wrote:
>
> I you want to know if the two blocks are reciprocals or each other, you
> can always look at the code. Neither of these blocks are very
> complicated.
>
> Tom
Sir,
I have tried using the float_to_char block and char_to_float bloack
simultaneously and tried to listen to s
Tom Rondeau wrote:
> Fatima Af wrote:
>>
>> Regards
>>
>
> You probably need to adjust for the difference in dynamic range. Float's
> give you 32-bits and chars are only 8-bits, so you will likely be
> clipping a lot. You need to understand the data types to convert from
> the floating-point
Hi,
I'm pretty new in working with gnuradio. Could you please tell me a bit of
detail about how to change the symbol rate, transmit power, and receiver
acquisition loop (command line? the script code?) Thanks a ton!!
Yanyan
Tom Rondeau wrote:
>
> yyzhuang wrote:
>> Hi All,
>>
>> We are tryi
On Sun, Mar 29, 2009 at 1:46 PM, Andrew Buck wrote:
> Thanks for the response Brian. What you described is actually what I'm
> currently doing: recording raw data to the hard drive and then processing it
> later. The raw data that I recorded is jagged. That's what I can't figure
> out. If the
Thomas,
Thanks for your clearly presented question. Answers embedded below.
Thomas wrote:
Hi all,
I have been trying to get a simple DSB AM exercise working without
success. I'm sure I'm doing something fairly dumb, and I would really
appreciate any help you can offer.
I have two USRP's, e
Thanks for the response Brian. What you described is actually what I'm
currently doing: recording raw data to the hard drive and then
processing it later. The raw data that I recorded is jagged. That's
what I can't figure out. If the USRP can record HDTV data, what am I
doing wrong that I c
From:
Konkreets Bass
Subject:
[Discuss-gnuradio] recorded FM signal from USRP
Date:
Sun, 29 Mar 2009 18:38:23 +0300
User-agent:
Inbox.lv Webmail
> Hi!
>
> I'm exploring GNU Radio in my
master thesys in context of FM reciever. Where could i > get >some
recorded
Fatima Af wrote:
Hi,
I am working on a project on Cognitive radios. I want to achieve
real-time transmission n reception of audio between two USRP boards. The
biggest problems i am facing are in designing the flow graphs because of
data type mis matches. For example i am taking the audio input f
On Sun, Mar 29, 2009 at 10:29 AM, Tom Rondeau wrote:
> I have used DBPSK and DQPSK fine with tunnel.py. You will probably have to
> play with the symbol rate, transmit power, and possibly the receiver
> acquisition loop settings.
In my experience, the acquisition loop settings are the most
sensi
yyzhuang wrote:
Hi All,
We are trying to set different modulation and demodulation schemes in
gnuradio example tunnel.py. The default is gmsk, which works fine. But when
we used -m dbpsk option, the two PCs can't ping each other (although after
ifconfig setup, both sender and receiver have outpu
On Sun, Mar 29, 2009 at 11:17 AM, Andrew Buck wrote:
> Hi,
>
> I'm trying to use a USRP to decode a CPFSK signal at 980MHz and 1Mb/s. The
> decoder successfully detects the sync pattern, but only about once a minute
> when the pattern is transmitted once a second. And when the decoder does
> det
Hi,
> On Sun, 3/29/09, slimchao wrote:
>
> Hi Firas,
>
> thanks! i am sure that a 4 Stage CIC Decimator is in the
> USRP FPGA DDC and 4x interpolation in the AD9860 (an interpolation rate
> of 4x is achieved using both interpolation filters). but how many Stage
> CIC Interpolator is in the F
Hi!
I'm exploring GNU Radio in my master thesys in context of FM
reciever. Where could i get some recorded FM sample signals from
USRP?
Thanks!___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradi
Hi,
I'm trying to use a USRP to decode a CPFSK signal at 980MHz and 1Mb/s.
The decoder successfully detects the sync pattern, but only about once a
minute when the pattern is transmitted once a second. And when the
decoder does detect the sync pattern, the data following the pattern is
inco
Hi,
> On Sat, 3/28/09, slimchao wrote:
>
> Hello,
>
> can anyone explain how implemented the CIC interploator
> Filter (how many
> stages) in the FPGA. if we want a interpolation of 32, the
> interpolation
> rate is 4 in the AD9860 (4x interpolation), sothat the
> interpolation is
> 32/4=8
Hi,
I am writing an interface between Windows and USRP. I have a simple question
to ask, does the USRP need any manual board configurations before I start
communicating with the FPGA through USB?
Thanks.
___
Discuss-gnuradio mailing list
Discuss-gnuradio
>
>
> On Sat, Mar 28, 2009 at 9:27 AM, Karthik wrote:
>
>> 2009/3/27 Mikhail Tadjikov
>>
>> Hello,
>>>
>>> I'm trying to build several signal processing blocks for a project that
>>> I'm doing using USRP2. I was going through the examples and sample code
>>> along with browsing the source code
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