Support MIMO beamforming on gNB

[zenghuacheng]

Hello:

I wonder if the current code can support transmitter-side beamforming for a two antenna gNB. I do see the receiver has code for 2x2 zero-forcing channel estimation and equalization. Does the transmitter side support 2x2 beamforming? If not, does the transmitter support multiple data streams to USRP? We want to implement a beamforming algorithm by three steps: (1) gNB's RF calibration; (2) uplink 2x2 channel estimation at gNB, (3) downlink beamforming at gNB (using channel reciprocity). Is it doable on srsRAN_Project? We have implemented and tested this solution in real time on USRP devices, but want to implement it on srsRAN_Project to evaluate its performance in 5G systems.

Thanks in advance!

Huacheng Zeng

[ismagom]

We are currently working on adding support for MIMO. Beamforming will come after that.

[frankist]

DL MIMO 2x2 and 4x4 has been added in the main branch.

[BENIEJAISON]

Which directory of srsRAN project has ZF for channel estimation