Hello,
inside the gmsk_demod function there is a quadrature_demod_cf block connected
to a clock_recovery_mm_ff block.
What is the purpose of the clock_recovery block? Is it there to correct the
timing when the sample rate is not an exact integral multiple of the
samples/symbol?
If that's t
Hi Josh,
This is really nice. A great interface. The only problem is that it doesn't
have some of the blocks I am using. :(
Feature request: rational_resampler and freq_xlating_fir_filter
Thanks,
Hans
- Original Message -
From: Josh Blum
To: discuss-gnuradio@gnu.org
Sent: T
Josh,
Hey that's great. Is there any way to set the Mux through GRC?
Thanks very much,
Hans
- Original Message -
From: Josh Blum
To: Hans Glitsch
Sent: Friday, February 09, 2007 10:06 AM
Subject: Re: [Discuss-gnuradio] GRC version 0.60
Hans,
Ok i wil
Hello,
If I want to use the rational resampler without filtering, is it valid do this?
taps = [1]
self.resampler = gr.rational_resampler_base_scc( 3, 2, taps )
Thanks,
Hans___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/
Hello,
I'm still new at this. Please be patient with me.
I'm getting confused by the variances in docs and articles I can find on the
internet. I'm confused about the exact capabilities of the usrp, and the Basic
RXs that I have. I have a usrp rev 4.1 and two basic RX boards (not sure about
Hello,
Does anyone have an example build tree for compiling one, or more custom blocks
besides the 'howto-write-a-block' example? If so, please send urls, or
tarballs.
I made my own blocks by adding to the how-to-write-a-block example and I was
able to build and use them with gnuradio, but be
Hello Daniel,
Thank you, your build tree helped a lot. I finally got my build tree to
work.
Hans
- Original Message -
From: "Daniel Garcia" <[EMAIL PROTECTED]>
To: "Hans Glitsch" <[EMAIL PROTECTED]>
Sent: Friday, March 02, 2007 4:17 PM
Subject:
Hello,
I want to change the clock on the usrp. Anyone know of a mail order place that
would have the right kind of vctcxo at 38.4MHz ? I tried Digikey and Mouser.
no luck.
Thanks,
Hans___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http:/
From: "Eric Blossom" <[EMAIL PROTECTED]>
To: "Hans Glitsch" <[EMAIL PROTECTED]>
Cc: "gnuradio mailing list"
Sent: Thursday, March 08, 2007 3:25 PM
Subject: Re: [Discuss-gnuradio] changing the vctcxo
On Thu, Mar 08, 2007 at 02:44:12PM -0800, Hans Glitsch w
Eric wrote:
Have you tried using oprofile to determine where the hot-spots are in
the code? http://oprofile.sf.net
In some of our other code we've noticed that substantial time is being
consumed computing sin and cos in some NCOs. That's one of the next
places we're looking at addressing wit
Hello,
I currently have four complex input signals coming in through USB and I have a
1pps timing pulse coming from a gps source that I need to synchronize the
64MHz clock to and also pass on to the PC so that I know exactly which sample
it occurred on. Can someone give me some guidance as to
I currently have four complex input signals coming in through USB
and I have a 1pps timing pulse coming from a gps source that I need
to synchronize the 64MHz clock to and also pass on to the PC so that
I know exactly which sample it occurred on. Can someone give me
some guidance as to how I mi
Hi,
You can use decimation and a rational_resampler block.
If you really need to change the clock read this:
http://www.comsec.com/wiki?USRPClockingNotes
It explains how to use an external clock source with the usrp. I was able
to use a 38.4MHz clock with the usrp from a signal generator. It
Hello,
What is the stop band of the FPGA CIC filter? How do I figure out the
attenuation at a given frequency outside my bandwidth?
I'm decimating by 250.
Thanks,
Hans
- Original Message -
From: "Vincenzo Pellegrini" <[EMAIL PROTECTED]>
To: "gnuradio mailing list"
Sent: Wednesda
iras abbas
To: Hans Glitsch
Cc: gnuradio mailing list ; Eric Blossom
Sent: Wednesday, May 16, 2007 11:19 PM
Subject: Re: [Discuss-gnuradio] CIC stop band
Dear Hans,
I think you meant the frequency response of CIC+ HBF filters. However, the
USRP CIC decimation filter has 4 sta
Hi,
Thank you very much for your help. Can you post the output of your matlab
program for 250 total decimation? I would do it myself with your m file,
but I don't have matlab.
Thanks,
Hans
- Original Message -
From: "Eng. Firas" <[EMAIL PROTECTED]>
To:
Sent: Thursday, May 17, 2
I'm using 4rx_0tx.rbf.
Thanks for your help,
Hans
- Original Message -
From: "Eric Blossom" <[EMAIL PROTECTED]>
To: "Hans Glitsch" <[EMAIL PROTECTED]>
Cc: "gnuradio mailing list"
Sent: Thursday, May 17, 2007 8:04 PM
Subject: Re: [Di
Hi,
I've got my own swig problem that I can't seem to figure out. I'm sorry this
email is so long. I'm asking for swig help from the gnuradio group because I
didn't think anyone else would understand the gnuradio block build environment.
I'm trying to use the tinyxml++ code in my gnuradio blo
Hello,
I have a complex signal at around 0Hz that I want to translate up to 25kHz.
I tried to use the freq_xlating_fir_filter like so:
gr.freq_xlating_fir_filter_ccf( 1, [1], 25e3, data_rate)
I want no decimation and no filtering in this operation.
when I set the decimation to 1, I get an as
Hello,
Please help me. I'm having a lot of trouble understanding the make files to
build gnuradio and the makefiles I use to build my own gnuradio blocks.
Also, swig hates me and I hate it. So far I've had no trouble building
gnuradio and building my own blocks by delicately modifying an exa
then later call the new function with:
sm.run_radio( adc._u )
When python executes the last line it throws an exception:
"TypeError: in method 'run_radio', argument 1 of type
'usrp1_source_sptr'"
My question is, what type should the parameter be in the run_radio
function? How do I get swig
Thanks, Chris and Eric, for the help so far. I was finally able to pass the
usrp1_source_c_sptr smart pointer into my c++ code. I have one more step that
I still can't seem to figure out:
I want to call functions on the smart pointer, but the functions are not
getting linked into my c++ code.
Hi,
I want to frequency shift my signal down to zero Hz. I can do that with the
ddc and a freq_xlating_fir_filter block, but there is always some frequency
error. Is there a block that will auto fine tune the shift frequency so the
output is as close as possible to 0 Hz?
If so, is there an e
Hi,
I got svn rev 6467 of the gnuradio trunk today and it built fine (with no
errors) on my Ubuntu desktop machine. Then I tried the same on my Ubuntu
server machine and 'make' ended with the following:
I deleted the entire `/home/superuser/SM1680/build/gnuradio' directory, did a
svn checkout
x
gr-audio-portaudio
gr-audio-windows
gr-comedi
gr-qtgui
These components will not be built.
- Original Message -
From: "George Nychis" <[EMAIL PROTECTED]>
To: "Hans Glitsch" <[EMAIL PROTECTED]>
Cc: "gnuradio mailing list"
Sent: Tuesday, September 18,
Hi,
What exactly does it mean to "look at change in phase over 1 SYMBOL"? Is it
just measuring the phase difference of two samples (separated by the number of
samples in one symbol) and then subtracting the phase rotation of the center
frequency across one symbol? Or does your algorithm look
Hi,
Please help me figure out the strange problem I'm having.
In my system, the software is receiving four interleaved streams of complex
data from the usrp. I am trying to receive two channels on each input of
the usrp, so I setup the usrp to ddc the center of the two channels down to
zero
Hello,
I may be having similar problems. I'm using 2 basic RX boards and I want to
receive four complex signals. I seem to be losing the complex part of the
first signal. I was using a mux of 0xf3f2f1f0, and after seeing your
message, I tried 0x32103210. Both of them show the same problem
For the Basic Rx, 0xf3f2f1f0 is the correct setting to feed 4 separate
signals into the I inputs of 4 DDCs, with zeros fed to the Q inputs.
To use 4 channels, you must use the std_4rx_0tx.rbf fpga image.
If you use the std_4rx_0tx.rbf image, the decimation rate must be <= 128.
If you need more d
Yes
- Original Message -
From: "Eric Blossom" <[EMAIL PROTECTED]>
To: "Hans Glitsch" <[EMAIL PROTECTED]>
Cc:
Sent: Tuesday, October 23, 2007 5:37 PM
Subject: Re: [Discuss-gnuradio] found problem with std_4rx_0tx.rbf
On Tue, Oct 23, 2007 at 05:16:14P
f anyone on the list has been able to reproduce this problem.
Thanks for your help,
Hans
- Original Message -
From: "Eric Blossom" <[EMAIL PROTECTED]>
To: "Hans Glitsch" <[EMAIL PROTECTED]>
Cc:
Sent: Tuesday, October 23, 2007 6:37 PM
Subject: Re: [Discu
Eric, thanks for your attention.
If anyone fixes this bug, or has a work-around, please let me know.
Thanks,
Hans
- Original Message -
From: "Eric Blossom" <[EMAIL PROTECTED]>
To: "Hans Glitsch" <[EMAIL PROTECTED]>
Cc:
Sent: Wednesday, October 24, 200
Ok, I found that the bug was introduced into std_4rx_0tx.rbf at version
4848. Version 4287 does not have the problem.
Hans
- Original Message -
From: "Johnathan Corgan" <[EMAIL PROTECTED]>
To: "Eric Blossom" <[EMAIL PROTECTED]>
Cc: "Han
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