Thank you Josh for your reply! > Well in gnuradio, you dont have access to the send function.
I created a usrp sink using uhd_make_usrp_sink(), and using the pointer to the multi_usrp that is returned from calling get_device() on the usrp sink variable, I access send() (ofcourse including the necessary uhd libraries). In fact, the method I use to access the send() function is the same as that used in the gr_uhd_usrp_sink.cc work() and start() functions. > The > scheduler will deliver two streams of equal length (from 2 ports). I use the uhd send() function to transmit data, as shown in rx_multi_samples.cpp for the receiver, and I actually referred to tx_bursts.cpp to implement the transmitter. Then I guess to control the data [source] in the streams, I would have to transmit samples from a .dat file (as done in tx_samples_from_file.cpp) using an ifstream, correct? Can I avoid the gnuradio usrp_sink scheduler by doing this? I also want to control when to use MIMO vs SISO, sometimes I only want to use a single antenna/transmitter. I can't find a method to specify which usrp/channel to use in send(). Is there a way to transmit on a single antenna/channel in a MIMO setting? There's set_antenna() in gr-uhd (set_tx_antenna() in UHD multi_usrp.hpp), can it be used to implement this? Thanks again, Lara -- View this message in context: http://gnuradio.4.n7.nabble.com/How-to-implement-MIMO-transmissions-tp39546p39574.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
