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Re: [softrock40] Re: Interesting SDR project funded by DARPA

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  • David Turnbull
    I can t confirm that anything we use actually runs on it, but Raspberry Pi has enough power many times over for ham SDR. The ARM11 has single-cycle 16x16 and
    Message 1 of 36 , Oct 29, 2012
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      I can't confirm that anything we use actually runs on it, but
      Raspberry Pi has enough power many times over for ham SDR. The ARM11
      has single-cycle 16x16 and 32x16 MAC instructions. That's right, the
      main CPU has a DSP instruction set. A Cortex M4 like on the new
      Stellaris LauchPad has MAC instructions and enough power to do any DSP
      you can imagine on audio bandwidth. You could even get certain models
      of the Cortex M3 at 33MHz to decode SSB and FM from 48kHz. The
      SimpleSDR is decoding SSB with an 8051 and a 128-tap DSP. Cheap DSP on
      audio bandwidth is a problem solved long ago.

      73 David AE9RB
      http://AE9RB.com/
    • Sid Boyce
      They must get a real good deal as the Origen board starts at $199.
      Message 36 of 36 , Oct 29, 2012
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        They must get a real good deal as the Origen board starts at $199.
        http://www.samsung.com/global/business/semiconductor/minisite/Exynos/platform_partners_platform.html#Arndale-Board
        73 ... Sid.

        On 29/10/12 22:02, Alex Turcu wrote:
         

        ODROID-X is indeed an impressive platform. However at $129 it seems subsidized (the CPU module itself sells for $119 and is out of stock), but as with the BeagleBone, I like the modularity!

        Alex

        On Mon, Oct 29, 2012 at 5:37 PM, Sid Boyce <sboyce@...> wrote:
         

        I gave up on the Pi largely because of the USB load problems and the tussles I had with trying unsuccessfully to get sound working.

        I have replaced it with the ODROID-X which is running hiqsdr-server, dspserver and QtRadio happily.
        73 ... Sid.

         
        On 29/10/12 20:25, Shirley Márquez Dúlcey wrote:
         

        > Cheap as it is, I dislike the RPi for its closed SoC, and I seriously doubt it has the horsepower for SDR (last time I checked I had no confirmation it would work). While it does have a GPU that may have enough horsepower, > it lacks OpenCL support and Broadcom don't seem to eager to implement it anytime soon (nor release specs for the open-source community to implement)


        The closed-source issue is no longer true as of a few days ago: http://www.raspberrypi.org/archives/2221

        The lack of computing power remains. I don't know whether the GPU in the Pi has enough flexibility to implement meaningful OpenCL support... though with the driver source now available it's something the community can investigate.

        Broadcom has historically been a problem for the open-source community, notably its WiFi interfaces. Kudos to them for opening up the source for the SoC in the Pi.



        -- 
        Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
        Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
        Senior Staff Specialist, Cricket Coach
        Microsoft Windows Free Zone - Linux used for all Computing Tasks
        



        -- 
        Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
        Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
        Senior Staff Specialist, Cricket Coach
        Microsoft Windows Free Zone - Linux used for all Computing Tasks
        
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