[Discuss-gnuradio] gr-osmosdr compile problems

2012-06-02 Thread Phil
Thank you for reading this. I've progressed a little since I last wrote and have received my ezcap USB dongle. Unfortunately, I'm still having problems. Cmake produces the following, which seems to indicate that all is well: -- ## -- # gr-o

Re: [Discuss-gnuradio] dc offset is different from unit to unit

2012-06-02 Thread James Jordan
Hi John, Thanks. But how to deal with rx dc offset? On 6/2/12, John Malsbury wrote: > James, > > In the case of DC calibration for tx, we'd recommend running the dc > calibration routines provided with UHD for each unit. The cal routines > make it a relatively easy process. > > In theory, if the

[Discuss-gnuradio] Question on DQPSK Modulation - issue with output

2012-06-02 Thread Vahid Behzadan
Dear all, I am currently trying to implement a pi/4 dqpsk modulator and demodulator. I have tried two approaches, one uses the CQPSK.py (included in osmocom's TETRA project) and the other uses digital.qpsk.dqpsk_mod. Both of these approaches have failed to return the same string of bits after the

[Discuss-gnuradio] Is it possible to have 2 TX x 1 RX MISO in GNU Radio

2012-06-02 Thread Nick Iliev
Hello, we have implemented a 2 TX x 1 RX MISO testbed with GNU Radio 3.4 and USRP1 . Both transmitters are using at 2.4GHz ( actually tx1 uses 2.401GHz and tx2 uses 2.403GHz ) , and are sending data ( BPSK modulated ) at the same time ( in the same time slot ). The summation of both transmission

Re: [Discuss-gnuradio] GRC - converting complex stream to vector for FFT

2012-06-02 Thread John Shields
Thanks, Josh. Will give it a whirl. Kind Regards, John On 03/06/12 05:33, Josh Blum wrote: On 06/02/2012 01:00 AM, John Shields wrote: I have complex multiplied a couple of 1 msps complex values and I wish to do a 2048 FFT so am trying to convert to 2048-len

[Discuss-gnuradio] GrExtras - write blocks in python, message passing, misc features...

2012-06-02 Thread Josh Blum
Hey list, I have put together a project on github with all (but a few) of the various features I have created for GNU Radio in the past 6 months or so. I have probably posted a link a few times, but I have been waiting to find the time to clean it up, make a wiki page, and announce. So here it is:

Re: [Discuss-gnuradio] GRC - converting complex stream to vector for FFT

2012-06-02 Thread Josh Blum
On 06/02/2012 01:00 AM, John Shields wrote: > I have complex multiplied a couple of 1 msps complex values and I wish > to do a 2048 FFT so am trying to convert to 2048-length vector but I > cannot find a suitable block in the 'stream conversion' group of GRC. By > making vec length 2048 I get the

[Discuss-gnuradio] crashes, memory errors and valgrind

2012-06-02 Thread Patrick Strasser
Hello list, I'm playing around with gqrx, an excellent example which great standalone software can be built with gnuradio. I'm running phirsch's rtlsdr fork, do not have a Funcube Dongle or USRP at hand, but rather a Terratex NOXON DAB stick - 25€ part does the trick fine enough for me ;-) I'm r

[Discuss-gnuradio] GRC - converting complex stream to vector for FFT

2012-06-02 Thread John Shields
I have complex multiplied a couple of 1 msps complex values and I wish to do a 2048 FFT so am trying to convert to 2048-length vector but I cannot find a suitable block in the 'stream conversion' group of GRC. By making vec length 2048 I get the correct kind of connector on the output of the bl