I wonder why this was not developed/contributed to the GNU Radio toolkit ( http://gnuradio.org/redmine/projects/gnuradio/wiki ) .
Because it probably does not use GNU Radio. Only the NI hardware.
A 4G LTE base station running entirely in software on a standard PC
61–70 of 134 posts
Re: A 4G LTE base station running entirely in software on a standard PC
#62I thought the frequencies necessary for LTE in the US are licensed exclusively to carriers? Or does LTE tolerate different networks on the same frequency?
You're right. This would be in violation of FCC regulation as it would interfere with a pre-existing network at 2600 MHz.
Re: A 4G LTE base station running entirely in software on a standard PC
#63Earlier quoted context omitted.
Because it's Fabrice Bellard. Look at his ouerve, he doesn't bother integrating any of his projects into anything else, or put more charitably, dance to the politics of other peoples' projects. I don't blame him. Contributing to GNU projects as an outsider is a PITA.
It's more than that, I think: I've worked with people of his caliber in other fields, and I can appreciate that they need to work at their own pace. e.g., if he submitted QEMU as a patch for bochs, and it was rejected (for whatever reason), does anyone think his time was better spent fixing that patch? He produces ingenious, high quality code, and does so at an unbelievable rate (note, none of his open source project…
What does he do for a living? I can't find anything about it on the wikipedia page, his personal page and the blog page about his achievements - strange.
Re: A 4G LTE base station running entirely in software on a standard PC
#64I thought the frequencies necessary for LTE in the US are licensed exclusively to carriers? Or does LTE tolerate different networks on the same frequency?
They are, which makes the carriers "primary users" of those bands. As an unlicensed user, you may still legally transmit on these bands as long as your transmissions are limited to a small range and do not interfere with a primary user's use.
This means that you must transmit at a low power, but exactly how low depends on the band.
Re: A 4G LTE base station running entirely in software on a standard PC
#65As cool as this is, the title is a bit misleading. This setup requires a "low cost software radio frontend" costing about $2000 and the author is using a high end i7 processor. Still a very cool use of SDR and probably considerably cheaper than the alternatives.
$2k is exceedingly cheap in the cellular space I would guess. So, the title would only be misleading out of context, in which Fabrice assumes you will find your own context, because he is to busy saving the world with code.
Also agree this is very cool use of SoftRadio.
Re: A 4G LTE base station running entirely in software on a standard PC
#66Re: A 4G LTE base station running entirely in software on a standard PC
#67The higher the genius, the simpler the webpage.
Bjarne Stroustrup says about this too.
Also have a look at Larry Wall's web page: http://www.wall.org/~larry/
Re: A 4G LTE base station running entirely in software on a standard PC
#68I always think how these hackers manage to do it. If you look at the projects in his homepage they vary across domains.
How do they manage to stay motivated, how do they learn all the stuff they do. And if I'm not wrong they do this apart from their day jobs.
Projects on his page are inspiring.
Re: A 4G LTE base station running entirely in software on a standard PC
#69Considering that this is from Fabrice Bellard, I actually was quite disappointed that this isn't really software-only, i.e. uses the side effect radio waves generated by some standard hardware to do it. Talk about high expectations…
Not sure what your comment means. Did you want a software EM field?
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Re: A 4G LTE base station running entirely in software on a standard PC
#70The higher the genius, the simpler the webpage.
Bjarne Stroustrup says about this too. Also have a look at Larry Wall's web page: http://www.wall.org/~larry/
My favorite example is http://okmij.org/ftp/
Quite beautiful.