IWR1443: Where is the API for the phase shifter?

Part Number: IWR1443

Hi there

Since there is a phase shifter in each transmitting channel, I want to steer the direction of beam by changing the phase of each channel. However, I cannot find the corresponding API. Can you tell me where can I find it?

Another question, based on the MMW demo, TI does the frequency domain beamforming for the received data without transmitting beamforming. Since there is a phase shifter for each channel, why the demo conducts the receiving beamforming instead of tranmistting beamforming?  Are there any considerations?

And also, where is the Technical Reference Manual for each of xWR14/16 chips? What I can find is just the datasheet.

Thanks

Xining Yu