[hpsdr] Teamspeak items (softcore/FFT)

[Phil Harman]

Hi Charles,

I'm interested in adding an FFT to Metis. One of our members has modified
the Mercury code to be a complete receiver i.e. filtering, demodulation
and AGC done in the FPGA. This way Mercury can be used as a remote
receiver and the data rate is OK to send over a VHF/UHF link.

I am intending the add an FFT to this project so you can have a remote
bandscope as well.

Part of the project is to implement the FFT, the other is to find an
elegant way of compressing the bandscope data.

I've tried the Altera Megafunction FFT and that compiles in the project
OK.  However, I need to write my own version since the purchase price is
too high.

I'm presently reading an ebook "An Introduction to Signal Processing and
Fast Fourier Transform" by Kevin McGee. It's the best detailed explanation
of the FFT that I've come across and highly recommended.

73 Phil....VK6APH



> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Charles,
>
> I am trying to get the Nios II soft core processor running on Metis.
>
> Currently having some problems with the JTAG UART debug port, but I am
> now suspecting it is my USB Blaster clone that is the problem.
>
> My goal initially is to try to get the current network code working in C
> rather than the current FPGA code and then to look at implementing my
> linux server code on the board.
>
> Still very early in the development cycle at the moment.
>
> Regards,
>
> John g0orx/n6lyt
>
> On Wed, 2010-11-24 at 07:51 +0000, Charles Brain wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hello All,
>>
>> There was a brief mention on Teamspeak that someone was
>> doing a softcore processor, is there any further information
>> about this or is it a wait and see job?
>>
>> Also on an earlier session someone mentioned something about
>> an FPGA FFT implementation.
>>
>> Now that I am actively doing some FPGA programming (finally
>> got my fixed point Cordic working)  both of these items suddenly
>> are of interest to me.
>>
>> On another, off topic item, I see that Ettus are producing a standalone
>> USRP that has a Gumstix board (720 MHz OMAP3) inside it (USRPE100).
>>
>> - Charles G4GUO
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