I am using AD_FMCOMMS3 and ML605 FPGA,and I am puzzled with rf_rx_bandwidth and rf_tx_bandwidth. In the AD9361 Evaluation Software , a typical LTE 20M should set rf_rx_bandwidth to 18MHz with a sample rate 30.72MHz.
But in the UG-570 ,it said :desired BBBW is 10Mhz in the LTE 20M，
What is the relationship between BBBW and rf_tx_bandwidth?
And now I send a data generated by PN sequence generator with QPSK modulation and after 4x inserted zeros the sample rate is 30.72MHz, What rf_rx_bandwidth should I set ?