schrieb Bruce Perens on 2011-12-07 04:20: > On 12/06/2011 06:39 PM, James Hall wrote:
>> Bruce, when you say the radio design presently looks at lot like the >> USRP, I'm hoping the price isn't going to look a lot like USRP as well. > I don't think it has to. The expensive parts are the gate-array, the > DAC, and the ADC. The USRP hasn't really followed the prices of these > components. How much baseband sampling rate are you thinking of? I guess the frontend would have to do mix to baseband anyway. SDRWidget[1] does 192kSps at 24 with highend consumer codecs, which should are by far not as expensive as the USRP MSps parts. Of course more bandwidth is better, I would be very glad to have the maximum allowed bandwidth for amateur radio operation available in digital baseband. This would open options for really all kinds of modulations. Was checking for low power SoC systems that can run Linux with some peripherals, and I stumbled over the Rasperry Pi[2] and the Pandaboard[3]. Combined with an frontend and a FPGA this could result in some portable radio. For some more FPGA-centered approach, the Charleston SDR[4] could be an starting point: A Digilent FPGA education board with an RX frontend. The Digilent board seems a little cumbersome to handle, especially if you do not want to use the Digilent tools, moreover it is no embedded system but a periferal. But I think it's a very nice idea. Patrick [1] http://sites.google.com/site/lofturj/sdr_widget [2] http://www.raspberrypi.org/ [3] http://pandaboard.org/ [4] http://www.amrad.org/projects/charleston_sdr/ -- Engineers motto: cheap, good, fast: choose any two Patrick Strasser <patrick dot strasser at tugraz dot at> Student of Telematik, Techn. University Graz, Austria ------------------------------------------------------------------------------ Cloud Services Checklist: Pricing and Packaging Optimization This white paper is intended to serve as a reference, checklist and point of discussion for anyone considering optimizing the pricing and packaging model of a cloud services business. Read Now! http://www.accelacomm.com/jaw/sfnl/114/51491232/ _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
