Re: AD9361 Receive RF Rx phase delay shift

  Hi,

I understand that there is digital delay. In order to implement QPSK I need to synchronize the phase of the Rx path, so I thought of sending sine wave training sequence from the transmitter and to move the RX phase until I get a perfect sine wave (not shifted sine wave – cosine) in the receiver.

I had few ideas

1. Maybe it is possible to control the phase of the ADC_CLK coming from the BBPLL or maybe a different way.

2.     Instead of using crystal oscillator I will a PLL that can move it’s phase.

3.     Using the DCXO to change the frequency up or down and then to return it to the original frequency which will cause phase shift.

Of course option 1 is the best one for me, is it possible or can you suggest other ways?

Thanks,

Lior