[Discuss-gnuradio] RANT ALERT: WTF Is wrong with you people?

2010-04-25 Thread Marcus D. Leech
I've noticed a disquieting, nay, alarming, trend on this mailing list in the last year or so. Software Defined Radio has become cool, it has become the chic thing to do in graduate school, or as the foundation for the start up of a new business. Everybody wants to do it. People get on to this

Re: [Discuss-gnuradio] RANT ALERT: WTF Is wrong with you people?

2010-04-25 Thread George Nychis
In my time here, I've learned that SDRs bring together two worlds... those in EE, and those in CS. Those from the CS world don't understand a lot of the RF world, but would like to leverage SDRs to achieve something at the higher level and are thrown in to the RF world. Those in the EE world,

Re: [Discuss-gnuradio] RANT ALERT: WTF Is wrong with you people?

2010-04-25 Thread Jeff Brower
Marcus- Your sentiments are understandable. I know the feeling. But please allow me to give an a different perspective. I've posted for years (since 1999) 1000s of times on DSP, audio, speech, MATLAB and FPGA groups -- on voluntary basis, because I want to. I can't count the number of times

Re: [Discuss-gnuradio] RANT ALERT: WTF Is wrong with you people?

2010-04-25 Thread Marcus D. Leech
On 04/25/2010 02:04 PM, Jeff Brower wrote: Yes I know such positive results are a minority of the posts you're thinking about. And yes it takes patience and can be exasperating, but isn't that generally true of raising kids? They have to learn the hard way, and someone has to help them,

Re: [Discuss-gnuradio] git commit for previous releases

2010-04-25 Thread Thomas Tsou
On Sat, Apr 24, 2010 at 1:05 AM, Firas Abbas firasmail2...@yahoo.com wrote: http://gnuradio.org/redmine/wiki/gnuradio/DevelopingWithGit Perhaps I should rephrase my question. In git, I want to track changesets between the current development tree and previous *releases*. It turns out to be a

[Discuss-gnuradio] Spam Filter Test

2010-04-25 Thread William Pretty Security Inc
Hi All. If this message makes it thru then I apologize for the spam, but I have been having trouble posting on the list. Here Goes . Bill ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org

[Discuss-gnuradio] discontinuous OFDM implementation?

2010-04-25 Thread George Nychis
Hi all, Has anyone out there implemented discontinuous OFDM on GNU Radio and the USRP? I've seen a couple papers with an implementation on GNU Radio in DySPAN and some other conferences, but nobody has responded to my requests for the implementation. - George

Re: [Discuss-gnuradio] discontinuous OFDM implementation?

2010-04-25 Thread Tom Rondeau
On Sun, Apr 25, 2010 at 2:37 PM, George Nychis gnyc...@cmu.edu wrote: Hi all, Has anyone out there implemented discontinuous OFDM on GNU Radio and the USRP?  I've seen a couple papers with an implementation on GNU Radio in DySPAN and some other conferences, but nobody has responded to my

Re: [Discuss-gnuradio] Clearly, I got gr.freq_xlating_fir_filter_ccc working!

2010-04-25 Thread Tom Rondeau
On Thu, Apr 22, 2010 at 1:07 AM, Marcus D. Leech mle...@ripnet.com wrote: Well, after a little bit of mucking about, I was able to down-shift the segment I needed into a range that  is audible to the human ear.  Here's a snippet: http://www.sbrac.org/files/vlf.mp3 Marcus, That's great! Glad

[Discuss-gnuradio] Recomendations for a new System ??

2010-04-25 Thread William Pretty Security Inc
Hi All; My Gnuradio development system just had a major brain fart, so I'm looking for recommendations on a replacement system. I know there are a number of flavors of quad core system out there but some appear to be better than others for this application. From what I have observed,

[Discuss-gnuradio] fft gui question

2010-04-25 Thread dave k
Can someone give me an idea on how i can put some kind of visual markers on a fft graph? attached is a photoshop image of what i would like to accomplish. Any ideas on how i could go about doing this? ___ Discuss-gnuradio mailing list

Re: [Discuss-gnuradio] fft gui question

2010-04-25 Thread Jacob Helwig
On Sun, Apr 25, 2010 at 15:14, dave k dave_k_...@yahoo.com wrote: Can someone give me an idea on how i can put some kind of visual markers on a fft graph?  attached is a photoshop image of what i would like to accomplish. Any ideas on how i could go about doing this? Looks like you forgot

Re: [Discuss-gnuradio] fft gui question

2010-04-25 Thread dave k
i tried reposting with attachment but it did not go through here is a link http://kd8eyf.org/images/FFT.png - Original Message From: Jacob Helwig jacob.hel...@gmail.com To: dave k dave_k_...@yahoo.com Cc: gnuradio Discuss-gnuradio@gnu.org Sent: Sun, April 25, 2010 6:18:29 PM Subject:

[Discuss-gnuradio] Intel Core i7 processors

2010-04-25 Thread William Pretty Security Inc
From what I have found so far, it seems that the i7 920 is only available in desktop systems. The leading edge in laptops seems to be the i7-720 processor. I could always develop on a desktop and then port the software to a laptop later, when prices come down J It's good to hear that Gnu

[Discuss-gnuradio] Ultimate SDR system ??

2010-04-25 Thread William Pretty Security Inc
Hi All; Found this little baby on Tiger Direct: http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=57 05306 http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=5 705306CatId=4938 CatId=4938 Hp Pavilion Intel i7-720QM processor, 6GB of DDR3 RAM

Re: [Discuss-gnuradio] Ultimate SDR system ??

2010-04-25 Thread Berndt Josef Wulf
G'day William, FYI: About a week ago, I was facing the same situation and decided to purchase a Dell Studio XPS 1645 laptop. The major factors for my decision were 1.) Onsite warranty repair 2.) Better screen resolution 1080p (1920x1080) 3.) Free inclusion of a blue-ray player (special) 4.)

[Discuss-gnuradio] Function:set_gain()

2010-04-25 Thread 陈小惠
Hi, everyone I'm confusing with the function set_gain().I got the gain range by function gain_range(),the first value is 0dB, the second is 90dB, and step is 0.05, the gain is from daughter board, or include the gain from ADC? Anyone can expain the details? 2010-04-26 --

[Discuss-gnuradio] Two daughter board cause frequency shift

2010-04-25 Thread abbasi9999
Hi all, I have problem using two daughter boards one as transceiver and the other for sensing. The process is ok, decimation rate is 256, freq: 2.4 - 2.5 GHz but there is a shift in the sensed frequencies. I read 'FSK with RFX2400' it explained about it, however when i use only one board for

Re: [Discuss-gnuradio] discontinuous OFDM implementation?

2010-04-25 Thread George Nychis
Do you mean discontinuous in time or frequency? If you're talking about frequency (selectively turning off subcarriers, which I've heard referred to as non-contiguous OFDM mostly), then there are definitely a few implementations out there. I saw two groups at the latest IEEE DySPAN

[Discuss-gnuradio] Error on reconnecting to TCP port

2010-04-25 Thread Berndt Josef Wulf
G'day, I've created a simple application in GRC using a TCP source in server mode. When started, it excepts connections on the allocated port for the first time. However, after statefully disconnecting from the port, any further attempts to make a new connection with the server application

Re: [Discuss-gnuradio] Error on reconnecting to TCP port

2010-04-25 Thread Josh Blum
Yes, definitely expected because of the way things are implemented: The server block waits on listen, and passes the file descriptor to the first connection to the gnuradio file descriptor source/sink. After that there is no way for it to accept another connection and replace the file

[Discuss-gnuradio] DQPSK Transmitter and Receiver

2010-04-25 Thread devin kelly
Hello Everyone, I've made a basic DBPSK transmitter and receiver. I can receive ASCII strings fine and the spectrum looks exactly as it should. However, if I swap the DBPSK modulator/demodulator for the DQPSK modulator/demodulator, my system breaks. I can no longer receive the same strings