On Mon, Sep 19, 2005 at 04:54:35PM -0400, Aaditeshwar Seth wrote: > Hi > > This is a follow-up on a mail I had sent out earlier to the list but > didn't get a reply. I found something interesting that I thought of > sharing with you guys. And it'll be great if you can tell me about some > public CDMA SDR implementations, and whether the people on this list are > thinking of doing anything about it in the future. > > Ok, so making this kind of a relay is indeed possible. And the kind of > applications it opens up are quite interesting. Have a look at > http://blizzard.cs.uwaterloo.ca/keshav/mediawiki-1.4.7/index.php/Recycling_a_billion_cell_phones > > which is my PhD supervisor's idea on reusing old cellphones. Now, when you > have this kind of a low-bandwidth cellular relay, you can have all your old > cellphones plugged in different rooms as security cameras (all cellphones > have cameras already!), or for medical survelliance, or just to do some > cool digital-home kind of stuff. So, it is indeed useful to have something > like this. And to do it, here is a small email exchange I had with people > working at a leading cellular provider.
Aaditeshwar, It is a shame if I have to buy or build a basestation to get any use out of old cell phones in my home, even if I can use a USRP and GNU Radio to do it. :-) Are any cellular modes more symmetric than CDMA? Is direct phone-to-phone communication possible, even without WiFi? Do you know whether or not it is possible to get instructions for re-programming the old phones? Dave -- David Young OJC Technologies [EMAIL PROTECTED] Urbana, IL * (217) 278-3933 _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
