[Discuss-gnuradio] Strange Error

Sometimes When I run my GRC flow graph it gives following error and the program runs very slowly and sometimes GRC also crashes... (python: (no.) ): Gtk:CRITICAL **:gtk_progress_set_percentage: assertion 'percentage >= 0 && percentage <= 1.0' failed the no. contains value like 3031, 2986 etc...

Re: [Discuss-gnuradio] Strange Error

On 3 May 2010 11:28, Umair Naeem wrote: > Sometimes When I run my GRC flow graph it gives following error and the > program runs very slowly and sometimes GRC also crashes... > > (python: (no.) ): Gtk:CRITICAL **:gtk_progress_set_percentage: assertion > 'percentage >= 0 && percentage <= 1.0' fai

[Discuss-gnuradio] File Source and FIle Sink

I need to know how are File source and file sink used. I am trying to use file sink to store samples that can be read into number sink but when i use file source to read the same file and try to read that data to number sink it shows None in the numbe sink. Is there any file extension problem or

[Discuss-gnuradio] Controlling multiple USRP 2 on the TX path

Hi everybody, just wanted to know if anything like this was done before by anybody: The idea is to control multiple USRP2 from one single host, over the very same Ethernet link. Like.. the closest possible thing to delivering them a phy-level copy of the very same Ethernet signal and having them t

Re: [Discuss-gnuradio] ofdm occupied tones concept

On 5/3/2010 1:48 AM, George Nychis wrote: On Sun, May 2, 2010 at 4:08 AM, jf w > wrote: Hi all, I'm thinking about implementing non-contiguous OFDM with gnuradio. So I read the ofdm codes of gnuradio. And I find the occupied tones concept in gnuradi

[Discuss-gnuradio] amplitude block returns instable values

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, I am trying to calculate the amplitude of a sine-signal. In grc the scope shows a instable value jumping between 0 and the real amplitude. My code is in the attachment. regards Georg -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (GNU/Linux)

Re: [Discuss-gnuradio] DQPSK Modulation/Demodulation issue

Hi Marcin, some answers - unfortunately only to those of your questions that I feel confident to answer. On Thu, Apr 29, 2010 at 06:45:23AM -0700, marcin_w wrote: > Getting back to the USRP model, i can't seen to work out whether my > bitrates/sample rates are correct. > For instance, the inter

Re: [Discuss-gnuradio] DQPSK Modulation/Demodulation issue

Hi Marcin, On Sun, May 02, 2010 at 10:24:57PM -0700, marcin_w wrote: > anyone? > Surely someone has created a dqpsk trasmitter/receiver that works with a > simple vector source as input & vector sink as output. I've tried that independent of you last week, but also was unable to make it work.

Re: [Discuss-gnuradio] ofdm occupied tones concept

George, > Since the code they built to do the NC-OFDM was based originally on the > code inside GNU Radio, doesn't it make sense to put that back into GNU Radio > instead of CGRAN? The way that I originally wrote the code was to allow for > people to do this by manipulating the subcarrier map, so

Re: [Discuss-gnuradio] How to set up MP-Benchmark Test PowerPC Processors (using Altivec)

On Mon, May 03, 2010 at 02:10:07PM +0200, matty wrote: > Hi, > > here is my mp-benchmark of PS3! Looks a little bit deformed at pipe 6. I'm > running at the moment another test, to check out. Do you have anything else running? Window manager? I've got mine configured to runlevel 3, no X, then ss

[Discuss-gnuradio] two doubts concerning WBX and **TX

Hello people, I'd like to know if I can do some modification in the WBX to go as low as 26MHz, is it possible? If not, what is better - BasicTX or LFTX, and what kind of RF frontend should I use - amplifiers and what more? Is there any transmitter daughterboard that covers bands lower than 50MHz fo

Re: [Discuss-gnuradio] ofdm occupied tones concept

On 05/03/2010 08:09 AM, Tom Rondeau wrote: On 5/3/2010 1:48 AM, George Nychis wrote: On Sun, May 2, 2010 at 4:08 AM, jf w mailto:jfwang...@gmail.com>> wrote: Hi all, I'm thinking about implementing non-contiguous OFDM with gnuradio. So I read the ofdm codes of gnuradio. And I find the occupie

Re: [Discuss-gnuradio] two doubts concerning WBX and **TX

On Mon, May 3, 2010 at 10:32 AM, Rafael Diniz wrote: > Hello people, > I'd like to know if I can do some modification in the WBX to go as low as > 26MHz, is it possible? > If not, what is better - BasicTX or LFTX, and what kind of RF frontend > should I use - amplifiers and what more? Is there any

Re: [Discuss-gnuradio] two doubts concerning WBX and **TX

On 05/03/2010 07:32 AM, Rafael Diniz wrote: Hello people, I'd like to know if I can do some modification in the WBX to go as low as 26MHz, is it possible? If not, what is better - BasicTX or LFTX, and what kind of RF frontend should I use - amplifiers and what more? Is there any transmitter daugh

Re: [Discuss-gnuradio] How to set up MP-Benchmark Test PowerPC Processors (using Altivec)

On Mon, May 03, 2010 at 07:16:18PM +0200, matty wrote: > Best thanks, > > i'm running Fedora 11 with XFCE4! I will run another test in text mode. > My second benchmark was essentially better. > > Is there any usable benchmark-code for *gcell*, where the SPEs are working? There are benchmarks tha

Re: [Discuss-gnuradio] How to set up MP-Benchmark Test PowerPC Processors (using Altivec)

Best thanks, i'm running Fedora 11 with XFCE4! I will run another test in text mode. My second benchmark was essentially better. Is there any usable benchmark-code for *gcell*, where the SPEs are working? Matty 2010/5/3 Eric Blossom > On Mon, May 03, 2010 at 02:10:07PM +0200, matty wrote: > >

Re: [Discuss-gnuradio] File Source and FIle Sink

There are many examples in the python files. Look into the logging section of any modulator/demodulator code. If you are reading or writing complex data use these gr.file_source(gr.sizeof_gr_complex,"filename") gr.file_sink(gr.sizeof_gr_complex,"filename") The first argument is the sizeof(dataty

[Discuss-gnuradio] OFDM with arbitrary modulations

This might be relevant to the "ofdm occupied tones concept" thread on this list. I have uploaded some code on github that implements an OFDM tx/rx with arbitrary modulation schemes per carrier. The user specifies a list of constellations (say, zeros, or pilots or QPSK or 16QAM) and then the index

Re: [Discuss-gnuradio] Parallel transmission and reception....

Hi Ali - I think if you search the GNU Radio discussion list you'll find some references similar to what you want to do. As a quick reply: If you want to monitor the channel using the same Tx/Rx antenna and Flex board, then you have 2 choices: (1) Do simultaneous Tx and Rx: You'll need to

[Discuss-gnuradio] Some basic questions

Hi, Could someone please answer following questions of mine : 1) In pkt = ofdm_packet_utils.make_packet(payload, 1, 1, self._pad_for_usrp, whitening=True) what is whitening? 2) In gr.fft_vcc(fft_size,forward, window, shift=false) What is window vector? 3) in ofdm_mod there is a portion o

[Discuss-gnuradio] New trunk incompatible with old USRPs?

Hi everybody, I have notice an oddity with recent trunks.. since I updated a couple of months ago, my USRP (#541) is not working any more with the current trunk. When I try to send out an 8MHz band, samples get consumed by the USRP slower than they are supposed to. This does not happen if I use old

Re: [Discuss-gnuradio] More Swept FFT

On 05/03/2010 10:37 PM, William Pretty Security Inc wrote: > > Ok. > > So I combined the suggestions from Josh and Marcus: > > > > Variables: > > decim: Value: 8 > > samp_rate: Value: 100e6/decim > > tun_freq:Value: 56e6+(tune*1e6) > > tune:

Re: [Discuss-gnuradio] More Swept FFT

The FFT Sink block controls work, but the center frequency doesn't change. When the connections are grey, its because one or both of the blocks it connects are disabled. Does the background the block(s) look greyed out as well? -Josh ___ Discu