Re: Suggestion for an SDR computer

[Johannes Demel]

Hi Moses,

2GSps sounds like a lot of samples. Assuming you have 16bit I and Q that 
would be around 64Gbit/s (4 * 8bit * 2e9) if streamed continuously. 
Thus, I'd focus on whatever interface you need to get your samples in 
and out of your CPU.

In my experience GNU Radio flowgraphs do not require a lot of RAM. I 
focused on core count and high CPU frequency.

Cheers
Johannes

On 20.02.21 22:27, Moses Browne Mwakyanjala wrote:
> Hi everyone,
> I will be acquiring a frontend that could receive up to 2 Gsps. The 
> frontend has an FPGA that could host user-defined VHDL signal processing 
> RTL. It can also stream data directly to the CPU or GPU. I understand 
> that using the FPGA or the GPU could be quite efficient. BUT, I want the 
> signal processing functions done in the CPU whereby the waveform is 
> processed in GNU Radio (or other C++ implementations). I'm currently 
> looking for a computer that could handle this sample rate. What kind of 
> specs do you think I could look for (RAM, CPU frequency, cache size 
> etc).? What specific products would you recommend?
>
> Regards,
> Moses.