On Mon, Jan 3, 2011 at 11:50 PM, <mm...@cicese.mx> wrote: > Hi all, > > Maybe this question has already been done, but I didn't found any relevant > information about it. I want to implement a MIMO OFDM system (2X1) with > the Alamouti's code in the URSP one, but so far I've only been able to run > an OFDM system using the benchmark_ofdm_tx.py and benchmark_ofdm_rx.py > codes. > > The system that I'll implement consist in two RFX2200 cards in the same > USRP working as the transmitter and one RFX2200 in another USRP working as > a receiver. > > I really don´t know how I can connect the two RFX2200 cards in the first > USRP one to sincronize them, because I tried to implement the alamouti > code and I need both of them transmitting at the same time, then in the > receiver use the Alamouti decoding to obtain the information sent. I once > read that it had to connect both RFX2200 card with a wired link in order > to sincronize them, is this correct or how I can sincronize them, or if > need a cable how I can make the connection with the RFX2200 cards ? > > I want to ask too if there are any MIMO-OFDM implementation in GNURadio, I > was checking and I didn't found any related to this. > > I hope someone can help or guide me with my doubts, any link, information > or answer will be helpful. > > Thks in advance.
Matt Ettus and I did some preliminary work on getting Alamouti codes into GNU Radio a while back. We've never found the time to complete it, but you can find it by setting up a remote tracking branch to http://gnuradio.org/git/trondeau.git and checkout the branch ofdm. It's in various stages of working, so no guarantees, but it will at least show you how we did the synchronization. Tom _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
