Hello, we have implemented a 2 TX x 1 RX MISO testbed with GNU Radio 3.4 and USRP1 . Both transmitters are using at 2.4GHz ( actually tx1 uses 2.401GHz and tx2 uses 2.403GHz ) , and are sending data ( BPSK modulated ) at the same time ( in the same time slot ).
The summation of both transmissions is causing problems at the receiver : 1 - the Costas PLL does not appear to lock to a single frequency 2 - the MM bit-synchronizer does not appear to work Has anyone attempted this type of MISO system with the default GNU Radio 3.4 and USRP1 distribution ? Our goal is to plot the constellation of all superimposed received symbols but to achieve this we need a frequency-locked receiver and a recovered ( bit-synchronous ) clock. Han and Nick UIC Wireless Lab _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
