[Discuss-gnuradio] Cyclic Prefixer Rolloff Samples

2013-08-23 Thread Bastian Bloessl
Hi, I wonder why the OFDM Cyclic Prefixer uses the samples at the beginning of the symbol to calculate the roll off. I would have expected that the samples from the end of the previous symbol are used. So something like this: https://github.com/bastibl/gnuradio/commit/1a1f0f92cedac90ccadf5e4

Re: [Discuss-gnuradio] Cyclic Prefixer Rolloff Samples

2013-08-23 Thread Martin Braun (CEL)
On Fri, Aug 23, 2013 at 10:10:13AM +0200, Bastian Bloessl wrote: > I wonder why the OFDM Cyclic Prefixer uses the samples at the > beginning of the symbol to calculate the roll off. I would have > expected that the samples from the end of the previous symbol are > used. So something like this: > >

[Discuss-gnuradio] GRAS Installation issue

2013-08-23 Thread Karan Talasila
Hi, I am trying to install grextras and so I tried to clone gras.git using the command git clone http://github.com/guruofquality/gras.git there is an error saying fatal:http request failed. when i tried to access the link directly without using git command it opened. So i tried to download

[Discuss-gnuradio] Problem with cmake not finding includes

2013-08-23 Thread matt . nottingham
Hi, I'm porting my real time Doppler correction block from 3.6 to 3.7 but have come across an issue that when I try to cmake it, I get an error saying it cannot find the runtime includes. To replicate this I created a new block ('howto') and tried to cmake that and got the same error: # gr_modto

[Discuss-gnuradio] Setting FIR Taps to None in C++

2013-08-23 Thread Luke B
I am writing a GR C++ program I would like to do a simple rate resampling and I don't need to use any FIR filters. Is there a Null Tap or a pass through filter I could use? Would some form of this work? upsample_audio = gr_make_rational_resampler_base_fff(44100, 8000, std::vector(1,0)); In pytho

Re: [Discuss-gnuradio] Setting FIR Taps to None in C++

2013-08-23 Thread Martin Braun (CEL)
On Fri, Aug 23, 2013 at 07:28:50AM -0400, Luke B wrote: > I am writing a GR C++ program I would like to do a simple rate resampling and > I > don't need to use any FIR filters. Is there a Null Tap or a pass through > filter > I could use? Would some form of this work? Luke, when you're resampli

Re: [Discuss-gnuradio] Cyclic Prefixer Rolloff Samples

2013-08-23 Thread Bastian Bloessl
On 08/23/2013 11:35 AM, Martin Braun (CEL) wrote: On Fri, Aug 23, 2013 at 10:10:13AM +0200, Bastian Bloessl wrote: I wonder why the OFDM Cyclic Prefixer uses the samples at the beginning of the symbol to calculate the roll off. I would have expected that the samples from the end of the previous

[Discuss-gnuradio] No attribute 'message_port_register_hier_out'

2013-08-23 Thread Gong Zhang
Hi, I execute the flowgraph in attachment and I got the following. What's the problem? I'm using Ubuntu 12.04, boost 1.48 and gnuradio 3.6.4. Thanks in advance. Traceback (most recent call last): File "/home/harry/Desktop/qwer/GRC/top_block.py", line 75, in tb = top_block() File "/hom

Re: [Discuss-gnuradio] Make tests failed when Building for version 3.7.1git

2013-08-23 Thread Tom Rondeau
On Fri, Aug 23, 2013 at 1:53 AM, Damon wrote: > >> On Tue, Aug 20, 2013 at 9:05 AM, Damon wrote: On Mon, Aug 19, 2013 at 8:29 AM, Damon wrote: > > Hi all, > > I tried installing GNUradio v3.7.1git. The build completed, but several > of > the build tests fail. >>

Re: [Discuss-gnuradio] Make tests failed when Building for version 3.7.1git

2013-08-23 Thread Marcus Leech
Is this a 32-bit install on 64-bit hardware issue?     on Aug 23, 2013, Tom Rondeau wrote: On Fri, Aug 23, 2013 at 1:53 AM, Damon wrote:>>> On Tue, Aug 20, 2013 at 9:05 AM, Damon wrote: On Mon, Aug 19, 2013 at 8:29 AM, Damon

Re: [Discuss-gnuradio] make test failure at qa_constellation_receiver

2013-08-23 Thread Tom Rondeau
On Thu, Aug 22, 2013 at 7:09 PM, Curt Karnstedt wrote: > Here are the results. I get a segfault, same as the last time after I fixed > the ownership. > > [curt@localhost build]$ ctest -V -R qa_constellation_receiver > UpdateCTestConfiguration from > :/home/curt/Downloads/gnuradio-3.7.0/build/Dar

Re: [Discuss-gnuradio] Make tests failed when Building for version 3.7.1git

2013-08-23 Thread Tom Rondeau
On Fri, Aug 23, 2013 at 10:32 AM, Marcus Leech wrote: > Is this a 32-bit install on 64-bit hardware issue? Possibly. I was wondering about that, too. Thought we had fixed those issues, but this might be a new version of it. -- Tom Visit us at GRCon13 Oct. 1 - 4 http://www.trondeau.com/grcon13

Re: [Discuss-gnuradio] make test failure at qa_constellation_receiver

2013-08-23 Thread Curt Karnstedt
After running some of the python scripts were listed in error message in the tracebacks, I ran the test again, and it passed. It's like either some dependency or library got built or loaded after I was fooling around. Test the theory, I rebuilt everything from scratch in a separate directory. Ho

Re: [Discuss-gnuradio] Setting FIR Taps to None in C++

2013-08-23 Thread Luke B
> when you're resampling, you *always* need FIR filters. Can you confirm > your application really doesn't need them and that you have fully > understood the theory behind resampling? > > I definitely don't really understand what I am doing. I am more of a software guy. Prior to resampling I alread

Re: [Discuss-gnuradio] Setting FIR Taps to None in C++

2013-08-23 Thread Jeffrey Walton
On Fri, Aug 23, 2013 at 11:09 AM, Luke B wrote: > > ... > I definitely don't really understand what I am doing. I am more of a > software guy. It looks like Amazon has a good selection of books on the subject (including recent titles using GNU gear): http://www.amazon.com/s/ref=nb_sb_noss_2?url=se

Re: [Discuss-gnuradio] Setting FIR Taps to None in C++

2013-08-23 Thread Martin Braun (CEL)
On Fri, Aug 23, 2013 at 11:09:46AM -0400, Luke B wrote: > I definitely don't really understand what I am doing. I am more of a software > guy. Prior to resampling I already used a low-pass filter to get the section > of > signal I need. The GRC file I am basing my program off of simply has "[]" fo

Re: [Discuss-gnuradio] Make tests failed when Building for version 3.7.1git

2013-08-23 Thread guowang qiu
Hi Tom, I don't change any files in the source code. I have downloaded the source code again this morning by: git clone git://git.gnuradio.org/gnuradio The installation environment： Ubuntu 12.04 32bit, with kernel version Linux 3.2.0-51-generic-pae， Intel(R) Core(tm) i7-3770 CPU @ 3.40GHz × 8 .

Re: [Discuss-gnuradio] Problem with cmake not finding includes

2013-08-23 Thread Andrew Davis
Wow, what a coincidence, I just ran into this problem this morning and was about to ask about it right before I saw your post, I too am having the exact same problem on xubuntu amd64. I have not done a git pull for a few days so this problem was not caused this morning by any commit if that helps.

Re: [Discuss-gnuradio] Problem with cmake not finding includes

2013-08-23 Thread Tom Rondeau
On Fri, Aug 23, 2013 at 10:51 AM, wrote: > Tom Rondeau writes: > > On Fri, Aug 23, 2013 at 6:11 AM, wrote: > > > > > > Hi, > > > > > > I'm porting my real time Doppler correction block from 3.6 to 3.7 but > > > have come across an issue that when I try to cmake it, I get an error > > > s

Re: [Discuss-gnuradio] Problem with cmake not finding includes

2013-08-23 Thread Johnathan Corgan
On Fri, Aug 23, 2013 at 3:11 AM, wrote: > -- Could NOT find GNURADIO_RUNTIME (missing: > GNURADIO_RUNTIME_INCLUDE_DIRS) > This might be the result of a recent merge...checking now. -- Johnathan Corgan Corgan Labs - SDR Training and Development Services http://corganlabs.com _

Re: [Discuss-gnuradio] Problem with cmake not finding includes

2013-08-23 Thread Tom Rondeau
On Fri, Aug 23, 2013 at 1:01 PM, Andrew Davis wrote: > Wow, what a coincidence, I just ran into this problem this morning and was > about to ask about it right before I saw your post, I too am having the > exact same problem on xubuntu amd64. I have not done a git pull for a few > days so this pro

[Discuss-gnuradio] UHD Error

2013-08-23 Thread Kapil Borle
Hi, I am trying to run benchmark_rx.py and the first time I execute it after booting up the PC, I encounter the error pasted at the end of this message. The error goes away when I try to run benchmark_rx again, but comes back again after rebooting and executing bechmark_rx. Some information about

Re: [Discuss-gnuradio] UHD Error

2013-08-23 Thread Marcus D. Leech
On 08/23/2013 09:03 PM, Kapil Borle wrote: Hi, I am trying to run benchmark_rx.py and the first time I execute it after booting up the PC, I encounter the error pasted at the end of this message. The error goes away when I try to run benchmark_rx again, but comes back again after rebooting an

Re: [Discuss-gnuradio] UHD Error

2013-08-23 Thread Kapil Borle
Hi Marcus, Adding an entry for the USRP in the arp table indeed solves the problem. But there is some discrepancy. As far as I know, I can add the entry using: 1. ping 192.168.10.2 2. arp -i eth1 -s 192.168.10.2 {HWADDR} 3. uhd_find_devices If I use the 1st method, I run into the same problem, wh