On Tue, 19 Apr 2011 11:41:46 -0700, Matt Ettus <[email protected]> wrote: > On 04/19/2011 11:38 AM, Colby Boyer wrote: >> Hi All, >> >> In RFID applications, a reader receives (backscatter from RFID tag) and >> transmits (constant tone) at the same frequency. With commercial >> readers, a single LO will be shared by the RX and TX chain. However, in >> the USRP case, two separate daughter boards are used so different LOs >> are in use for the RX and TX chain. So you should end up with some >> frequency offset in RX chain due to mismatched clocks. >> >> Is it possible to lock the LOs of a TX daughter board and a RX daughter >> board, as you would for a traditional MIMO 2 TX or 2 RX setup? There >> appears to numerous discussions and examples of the latter. I'm thinking >> it would be possible. But I'm more of a systems guy and less of a RF >> hardware guy, so any comments would be appreciated. >> >> Thanks, >> Colby > > > As long as you set them to the same frequency, they're already locked. > No need to do anything different. > > Matt > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
True, for a SISO system with TDD(not FDD) theres no problem for your kind of application. Regards Agile Solutions _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
