Re: [Discuss-gnuradio] grc code generation issues with name confliction

2011-09-09 Thread Josh Blum
On 09/09/2011 09:36 PM, Kyle Zhou wrote: > If I have two packages 'packa' and 'packb', each of them has a module 'modc'. > This is not a problem since they belong to different packages. > But if I use these two modules in GRC at the same time, the following python > codes are generated: > > fro

[Discuss-gnuradio] grc code generation issues with name confliction

2011-09-09 Thread Kyle Zhou
If I have two packages 'packa' and 'packb', each of them has a module 'modc'. This is not a problem since they belong to different packages. But if I use these two modules in GRC at the same time, the following python codes are generated: from packa import modc from packb import modc Thereafter,

Re: [Discuss-gnuradio] OFDM Implementation

2011-09-09 Thread Colby Boyer
Check out some of the publications by Fred Harris. He has written some good stuff on sync. algorithms. On Fri, Sep 9, 2011 at 5:48 PM, Tuan (Johnny) Ta wrote: > Thanks Marcus, that was very informative! > > On Fri, Sep 9, 2011 at 8:00 PM, Marcus D. Leech wrote: > >> On 09/09/2011 07:26 PM, Tuan

Re: [Discuss-gnuradio] OFDM Implementation

2011-09-09 Thread Tuan (Johnny) Ta
Thanks Marcus, that was very informative! On Fri, Sep 9, 2011 at 8:00 PM, Marcus D. Leech wrote: > On 09/09/2011 07:26 PM, Tuan (Johnny) Ta wrote: > >> As far as I know there's no open source code for an OFDM transceiver >> available. I was trying to build one half a year back but wasn't success

Re: [Discuss-gnuradio] OFDM Implementation

2011-09-09 Thread Marcus D. Leech
On 09/09/2011 07:26 PM, Tuan (Johnny) Ta wrote: As far as I know there's no open source code for an OFDM transceiver available. I was trying to build one half a year back but wasn't successful before I had to move on to something else. The benchmark_ofdm code will give you a simplex OFDM system

Re: [Discuss-gnuradio] OFDM Implementation

2011-09-09 Thread Tuan (Johnny) Ta
As far as I know there's no open source code for an OFDM transceiver available. I was trying to build one half a year back but wasn't successful before I had to move on to something else. The benchmark_ofdm code will give you a simplex OFDM system. Ie you can run the transmitter on 1 USRP and recei

Re: [Discuss-gnuradio] OFDM benchmark transmit signal bandwidth

2011-09-09 Thread Guanbo Zheng
Great!! Thanks for your explanation! Guanbo On Fri, Sep 9, 2011 at 5:41 PM, Tom Rondeau wrote: > On Fri, Sep 9, 2011 at 6:36 PM, Guanbo Zheng wrote: > >> >> >> On Fri, Sep 9, 2011 at 8:18 AM, Tom Rondeau wrote: >> >>> On Thu, Sep 8, 2011 at 6:47 PM, Guanbo Zheng wrote: >>> Hi all >>

Re: [Discuss-gnuradio] OFDM benchmark transmit signal bandwidth

2011-09-09 Thread Tom Rondeau
On Fri, Sep 9, 2011 at 6:36 PM, Guanbo Zheng wrote: > > > On Fri, Sep 9, 2011 at 8:18 AM, Tom Rondeau wrote: > >> On Thu, Sep 8, 2011 at 6:47 PM, Guanbo Zheng wrote: >> >>> Hi all >>> >>> I am currently using OFDM benchmark to generate OFDM signal under the >>> setting of FFT len, CP length, occ

Re: [Discuss-gnuradio] OFDM benchmark transmit signal bandwidth

2011-09-09 Thread Guanbo Zheng
On Fri, Sep 9, 2011 at 8:18 AM, Tom Rondeau wrote: > On Thu, Sep 8, 2011 at 6:47 PM, Guanbo Zheng wrote: > >> Hi all >> >> I am currently using OFDM benchmark to generate OFDM signal under the >> setting of FFT len, CP length, occupied-tones and something. >> But I can not find out what is the r

[Discuss-gnuradio] Thoughts on relative_rate

2011-09-09 Thread Eugene Grayver
Hi, As GR is maturing, we get more support for complex blocks with nontrivial input/output relationships. The option to 'produce' inside the ::work function is a major step in this direction. Consider a block with two outputs: one at 1:1 rate, and one at N:1 rate. It may be useful to allow

Re: [Discuss-gnuradio] Cognitive Radio Implementation with, XML

2011-09-09 Thread Eugene Grayver
Hi Songsong, This is not entirely on topic but you may be interested in my work on XML description for waveforms. See http://sdrphy.org I know some VT folks are using it for their cognitive radio research. We implemented a really basic interpreter to configure a predefined GRC design based on

Re: [Discuss-gnuradio] Bug in 'gr_tagged_file_sink.cc'

2011-09-09 Thread Tom Rondeau
On Wed, Sep 7, 2011 at 5:16 AM, Daniel Bartel wrote: > Hi, > > I found a bug in the 'gr_tagged_file_sink.cc' file during my work on a > burst detection. > > Line 203 should be changed to: > 203 int count = fwrite (&inbuf[d_itemsize*idx], d_itemsize, > noutput_items-idx, d_handle); > > The origin

Re: [Discuss-gnuradio] Thoughts on stream tag propagation

2011-09-09 Thread Tom Rondeau
On Thu, Sep 8, 2011 at 6:22 PM, Martin Braun wrote: > On Thu, Sep 08, 2011 at 09:41:03AM -0700, Eugene Grayver wrote: > > Hello, > > I am starting to actively use stream tags and am finding them quite > useful. I > > have one suggestion: > > > > Tags propagated through a block with a known delay

Re: [Discuss-gnuradio] Cognitive Radio Implementation with XML

2011-09-09 Thread Tom Rondeau
On Fri, Sep 9, 2011 at 2:09 AM, Songsong Gee wrote: > Hello, > > I'm now trying to make congitive radio with help of a following article. > Configurable SDR Operation for Cognitive Radio Applications using GNU Radio > and the Universal Software Radio Peripheral, * > http://scholar.lib.vt.edu/thes

Re: [Discuss-gnuradio] OFDM benchmark transmit signal bandwidth

2011-09-09 Thread Tom Rondeau
On Thu, Sep 8, 2011 at 6:47 PM, Guanbo Zheng wrote: > Hi all > > I am currently using OFDM benchmark to generate OFDM signal under the > setting of FFT len, CP length, occupied-tones and something. > But I can not find out what is the real bandwidth of signal it generated. > Because when I change

Re: [Discuss-gnuradio] OSX Audio Problem - AudioUnitRender kAudioUnitErr_CanNotDoInCurrentContext

2011-09-09 Thread Michael Dickens
As a bit of history, I wrote the OSX audio interface back in Winter of 2005/6; it was designed for OSX 10.4, and IIRC worked under 10.5 without changes. 10.6 introduced some small changes, which is where the "GR_USE_OLD_AUDIO_UNIT" came from -- someone else did the work, and I helped test it.

Re: [Discuss-gnuradio] OSX Audio Problem - AudioUnitRender kAudioUnitErr_CanNotDoInCurrentContext

2011-09-09 Thread chris lirakis
Hi Kunal, It has been very helpful discussing this with you! The java program you sent me compiled. I had two problems one was that there was an issue with the settings. OSX told me that the hardware did not support the combination of settings. Once I got past that it rejected the network connecti

Re: [Discuss-gnuradio] UHD + USRP2 + WBX doubt

2011-09-09 Thread skcruser
sumitstop wrote: > >>> http://www.youtube.com/watch?v=REDK7M-83WQ > i had seen that video sumit..in tht LED B turns on in the end rite... > in my case it was not turning on..so i got worried > now i knw tht it turns on only when mimo cable is being used > >>> uhd_fft.py receives the signal from