It seems like if you have one USRP sink (for MIMO tx) and one USRP source (for rx) that's all you should need. You can evaluate the rx_time from the rx to know where you are in time.
Although I admit I'm probably not fully understanding what you want to do. Maybe you can eloborate? m On 04/13/2016 09:23 AM, Pavan Yedavalli wrote: > Hi, > > I have been trying to do some research using MIMO transmitters and > feedback from a receiver. Specifically, I have two antennas connected to > two USRPs, and I am transmitting the same signal from both of those > (MIMO synchronized) to another USRP and antenna.This receive USRP and > antenna needs to measure its received power, which I then feed back to > my computer, do some processing on it, and then produce a new > transmission from the two antennas on the left, and that keeps going > until my loop is done. > > What I'm having trouble with is how to set up my self-created block to > transmit from the two synchronized ones with my particular weights but > also receive from the one on the right correctly so that it gives me the > proper received power. Right now, I'm doing both the transmit and > receive processes independently, and it's very difficult to get the > proper capture on the receive side and send it back. > > I'm not sure if that makes sense, but that type of feedback has been > very difficult. Note that I've been able to create this loop, block, and > feedback setup with an RSSI circuit and the two transmitters because I > can feedback its reading through USB nicely/if not with a bit of a hack > using minicom. I just can't do it when the receiver is a USRP. I must be > missing something. Thank you for any help. > > -- > Pavan > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
