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

On 07/30/2010 01:19 PM, Daniel Halperin wrote:
>> 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:

I don't think you need to read the license carefully to realize you do
not want to download the code.

1) No commercial use clause.
2) You cannot distribute derived works.
3) You grant MS the right to use your modifications to the code.

Even if you are in an academic situation, you need to think about your
future in the commercial space before looking at the code.

Philip

>
> http://research.microsoft.com/en-us/projects/sora/
>
> and the original paper:
>
> http://research.microsoft.com/apps/pubs/default.aspx?id=79927
>
> Dan
>
>
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