On Sun, Mar 05, 2006 at 05:20:48PM +1100, Jovan Mostanovski wrote: > Hi group, > As part of my major uni project I'm using software radio to create a > data communications network for long range HF transmission.
Sounds good. > The problem is that to do make this system we only have 8 months, and it > has become evident that there is too much work involved in this project > when including all the real world testing. > Not only that, but we need to start working right away, and waiting > weeks to receive the USRP and other hardware required is no longer an > option. I suspect Matt can get you USRP's within a week. Money has a way of speeding up those global transportation problems ;) > I've come up with the idea to implement the whole system in software > initially, so that we can start working on it straight away, and this > takes real world testing out of the equation, because it is impractical > for us to test the system for transmissions between moving nodes > situated hundreds of kilometers apart. Also, we are only undergrad > students and just don't have the experience. > > What I'm thinking of doing is something like this: > > ---------- --------------- -------------------- > Protocol |--> | Modulator |--> | Freq conv to RF |--> > ---------- --------------- -------------------- > > ------------------------------- -------------------- ---------- > | Simulation of doppler shift |--> |Freq conv to IF |--> | Demod | > | & multi path fading | | | | | > -------------------------------- -------------------- ---------- > > etc etc....... > > Each part would be designed as a GNU Radio block, hence reuseable for > other application... This sounds reasonable. We currently don't have anything that simulates fading channels and it would be great to add that to our collection of blocks. > What are your opinions on this approach? How will you know if your simulation is correct and that your channel simulator reflects some semblance of reality? [ The devil made me say it ;) ] Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
