RE: [Discuss-gnuradio] gnuradio land speed record?

[Clark Pope]

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> Date: Fri, 30 Jul 2010 10:19:35 -0700
> From: address@hidden
> To: address@hidden
> CC: address@hidden; address@hidden
> Subject: Re: [Discuss-gnuradio] gnuradio land speed record?
>
> > On 07/30/2010 09:33 AM, Clark Pope wrote:
> >>
> >> I'm curious what people do with the wideband capability of the
> >> gnuradio/usrp and what is the widest bandwidth signal one can really
> >> process with available computers?
> >>
> >> What's the most anyone has recorded or processed continuously? What
> >> level of compexity was the processing?
> >
> >
> > With RAID arrays or SSDs, it isn't that hard anymore to sustain 100 MB/s
> > recording to disk. With 4 and 6 core systems and the i7 architecture you can
> > get more than 5X the performance of your laptop.
> >
> > There are a lot of applications using the full 25 MHz of RF bandwidth. You
> > just need to pay a lot of attention to efficiency of your program and
> > algorithms.
> >
>
> For 'speed record' type information, you might be interested in SORA, a
> software radio project from Microsoft Research. They use different
> hardware and custom software, but the fundamentals are the same.
>
> As Matt points out, efficiency is a function of engineering. Using modern
> processors, 64-bit architecture, multicore, software LUTs, and a variety
> of other optimizations they were able to fully process 802.11g signals of
> 20 MHz bandwidth and sustain reception of 54 Mbps signals including
> Viterbi decoding, etc. I see no reason this couldn't be done with
> USRP(2) / GNU Radio... but looking at Microsoft's author list they had a
> lot of developers working pretty hard on it!
>
> There's not a ton of detail in the original paper, and what code is
> available is almost certainly not something you want to look at without
> reading the license very carefully, but here's the link to the project
> website:
>
> http://research.microsoft.com/en-us/projects/sora/
>
> and the original paper:
>
> http://research.microsoft.com/apps/pubs/default.aspx?id=79927
>
> Dan
>
 
Thanks that's a good data point! So a huge corporation with infinite resources 
tops out at about 20 MHz sustained processing of what I would call a real world 
practical signal. -Clark