Hi,
You could build your own design on top of the base overlay. This block design is heavy, I would be time consuming to build another one from scratch.
Specifically, you would have to change the transmitter block, I did some explanations here:
[RF SoC 4x2] How to send complexes from a board to another via the analog converters?
For the packet generator blocks, I did not find their codes. It seems they are formatting the frames received by the ADC to be understood as complexes. When I deleted that block, the 2 DMA blocks were not able to save the complexes received, they did not detect the values.