I need to implement BLE AoA Direction finding using PDDA (propagation direct data aquisition) algorithm in python as explained in the paper below. I am using a 12 antenna array as mentioned in this paper.

https://ieeexplore.ieee.org/document/9676583

I managed to solve till step (8), but could not implement step (9) onwards. any pointers to the PDDA python implementation for BLE AoA or if it is too easy for someone to just write the code, I would really appreciate. TIA.