Another free online DSP book, that I stumbled upon this evening is Signal Processing for Communications. I have not gone much past the table of contents, but it looks interesting.
http://www.signalprocessingforcommunications.org/ <http://www.signalprocessingforcommunications.org/index.html> <http://www.signalprocessingforcommunications.org/index.html>Jim KA2RVO On Wednesday, July 27, 2016, tomb18 <tom...@videotron.ca> wrote: > Hi It's not that simple Basically you take the I and q signals, sample > them with the sound card, convert them to a complex number, pop them in a > fast Fourier transform, do a rectangular to polar conversion and then > calculate the magnitude in dBm. Then plot them. There's a few more nuances > but that's the overall idea. Check out the free book on the Internet called > the scientists guide to digital signal processing.73 Tom va2fsq.com > > > Sent from my Samsung Galaxy smartphone. > -------- Original message --------From: Enzo Adrian-Reyes < > enzo.adrianre...@gmail.com <javascript:;>> Date: 2016-07-27 7:16 PM > (GMT-05:00) To: Elecraft List <elecraft@mailman.qth.net <javascript:;>> > Subject: [Elecraft] KX3 SDR > Hi All > > Yes this topic might be a little bit more complicated than the title > suggest. > > So I have the KX3 plugged into the audio input of my computer, and its > sending quadrature data (IQ) to the sound card, the sound card samples at > 96Khz. > > So my question is how I process this? Yes I know use a piece of software, > but I am trying to write this, I know the IQ data is coming through down > and if I use the right process on the IQ data I get base band data out. I > kind of know that however I dont understand the SDR data coming out, so for > example and I getting sample of IQ data at freq point Y, or is it a > circular buffer arrangement. > > I guess what I am saying is, is the IQ data coming from teh KX3 data from > teh Centre Freq (+/-) the bandwith scope, or just the centre freq + some > additional side bands? > > How are bandwith and sampling rate related? I mean if I am sampling at at > 96Khz, with a band with of 48Khz does that mean I am only getting 2 samples > per second at perticular freq??? Or am I getting the entire band of 48Khz > at 96Khz. > > Regards > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net <javascript:;> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to tom...@videotron.ca <javascript:;> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net <javascript:;> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to ka2...@gmail.com <javascript:;> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
