You have two options: 1. Burst both TX and RX. To do that, you call send() on the TX streamer with the EOB flag set in the metadata, and you use issue_stream_command() on the RX streamer to request fixed number of samples. In both cases, you would also provide a timestamp.
2. Permanently RX, and send TX bursts. On the TX side, it's the same as before. On the RX side, you simply issue stream command (to stream continuously) and then send bursts. That means your receiver will pick up TX leakage when you're transmitting, though. You can see rx_timed_samples and tx_bursts as UHD references. In GNU Radio, to transmit bursts, you throw down a regular USRP Sink and attach timestamps. If you look at the OFDM TX examples, they do that. However, to receive, you will need to write some Python to call issue_stream_command() on the USRP Source in the same way as explained before. -- M On Mon, Oct 29, 2018 at 8:34 PM Huacheng Zeng via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi All: > > I am using N210 (with SBX daughter board) to test the channel reciprocity. > I wish to transmit signal using antenna "Tx/Rx" in time slot 1, and then > receive signal using the same antenna in time slot 2, and so on so forth. > > I can do this manually, but do not know how to do it by programming > (either using GR or OOT C++ blocks). Any one can help? > > Thanks in advance! > Hua > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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