Disable AMPDU and retransmission on RaspberryPi 4

[FaDoSolReLaMiTi]

Hi,

I am using firmware 7.45.189 on RaspberryPi 4 onboard Wi-Fi and everything works well. I captured the transmitted waveform using an SDR device and use MATLAB WLAN Toolbox to analyze it. There are 7 retransmission packets and the packet content is A-MPDU. I tried

set_intioctl(wlc, NEX_SET_AMPDU_TX, 0);
set_intioctl(wlc, WLC_SET_LRL, 0);
set_intioctl(wlc, WLC_SET_SRL, 0);

but there is no difference and I found those functions are not implemented. Is there a way to disable AMPDU and retransmission for a better injection?